/*
- * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2019 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*/
-
+
/*-
* Copyright (c) 1982, 1986, 1991, 1993
* The Regents of the University of California. All rights reserved.
#include <sys/malloc.h>
#include <sys/namei.h>
#include <sys/mount_internal.h>
-#include <sys/vnode_internal.h>
+#include <sys/vnode_internal.h>
#include <sys/file_internal.h>
#include <sys/stat.h>
#include <sys/uio_internal.h>
#include <sys/persona.h>
#include <sys/reason.h>
#if SYSV_SHM
-#include <sys/shm_internal.h> /* shmexec() */
+#include <sys/shm_internal.h> /* shmexec() */
#endif
-#include <sys/ubc_internal.h> /* ubc_map() */
+#include <sys/ubc_internal.h> /* ubc_map() */
#include <sys/spawn.h>
#include <sys/spawn_internal.h>
#include <sys/process_policy.h>
#include <ipc/ipc_types.h>
+#include <mach/mach_param.h>
#include <mach/mach_types.h>
#include <mach/port.h>
#include <mach/task.h>
#include <security/mac_mach_internal.h>
#endif
+#if CONFIG_AUDIT
+#include <bsm/audit_kevents.h>
+#endif
+
+#if CONFIG_ARCADE
+#include <kern/arcade.h>
+#endif
+
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_protos.h>
#include <kdp/kdp_dyld.h>
+#include <machine/machine_routines.h>
#include <machine/pal_routines.h>
#include <pexpert/pexpert.h>
#include <sys/kern_memorystatus.h>
#endif
+#include <IOKit/IOBSD.h>
+
+extern boolean_t vm_darkwake_mode;
+
+extern int bootarg_execfailurereports; /* bsd_init.c */
+
#if CONFIG_DTRACE
/* Do not include dtrace.h, it redefines kmem_[alloc/free] */
extern void dtrace_proc_exec(proc_t);
#endif
/* support for child creation in exec after vfork */
-thread_t fork_create_child(task_t parent_task, coalition_t *parent_coalition, proc_t child_proc, int inherit_memory, int is64bit, int in_exec);
+thread_t fork_create_child(task_t parent_task,
+ coalition_t *parent_coalition,
+ proc_t child_proc,
+ int inherit_memory,
+ int is_64bit_addr,
+ int is_64bit_data,
+ int in_exec);
void vfork_exit(proc_t p, int rv);
extern void proc_apply_task_networkbg_internal(proc_t, thread_t);
extern void task_set_did_exec_flag(task_t task);
void thread_copy_resource_info(thread_t dst_thread, thread_t src_thread);
void *ipc_importance_exec_switch_task(task_t old_task, task_t new_task);
extern void ipc_importance_release(void *elem);
+extern boolean_t task_has_watchports(task_t task);
/*
* Mach things for which prototypes are unavailable from Mach headers
*/
-void ipc_task_reset(
- task_t task);
-void ipc_thread_reset(
- thread_t thread);
+#define IPC_KMSG_FLAGS_ALLOW_IMMOVABLE_SEND 0x1
+void ipc_task_reset(
+ task_t task);
+void ipc_thread_reset(
+ thread_t thread);
kern_return_t ipc_object_copyin(
- ipc_space_t space,
- mach_port_name_t name,
- mach_msg_type_name_t msgt_name,
- ipc_object_t *objectp);
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_msg_type_name_t msgt_name,
+ ipc_object_t *objectp,
+ mach_port_context_t context,
+ mach_msg_guard_flags_t *guard_flags,
+ uint32_t kmsg_flags);
void ipc_port_release_send(ipc_port_t);
#if DEVELOPMENT || DEBUG
* activator in exec_activate_image() before treating
* it as malformed/corrupt.
*/
-#define EAI_ITERLIMIT 3
+#define EAI_ITERLIMIT 3
/*
* For #! interpreter parsing
extern vm_map_t bsd_pageable_map;
extern const struct fileops vnops;
+extern int nextpidversion;
-#define USER_ADDR_ALIGN(addr, val) \
+#define USER_ADDR_ALIGN(addr, val) \
( ( (user_addr_t)(addr) + (val) - 1) \
- & ~((val) - 1) )
+ & ~((val) - 1) )
- /* Platform Code Exec Logging */
+/* Platform Code Exec Logging */
static int platform_exec_logging = 0;
SYSCTL_DECL(_security_mac);
SYSCTL_INT(_security_mac, OID_AUTO, platform_exec_logging, CTLFLAG_RW, &platform_exec_logging, 0,
- "log cdhashes for all platform binary executions");
+ "log cdhashes for all platform binary executions");
static os_log_t peLog = OS_LOG_DEFAULT;
-struct image_params; /* Forward */
+struct exec_port_actions {
+ uint32_t portwatch_count;
+ uint32_t registered_count;
+ ipc_port_t *portwatch_array;
+ ipc_port_t *registered_array;
+};
+
+struct image_params; /* Forward */
static int exec_activate_image(struct image_params *imgp);
static int exec_copyout_strings(struct image_params *imgp, user_addr_t *stackp);
static int load_return_to_errno(load_return_t lrtn);
static int exec_add_apple_strings(struct image_params *imgp, const load_result_t *load_result);
static int exec_handle_sugid(struct image_params *imgp);
static int sugid_scripts = 0;
-SYSCTL_INT (_kern, OID_AUTO, sugid_scripts, CTLFLAG_RW | CTLFLAG_LOCKED, &sugid_scripts, 0, "");
+SYSCTL_INT(_kern, OID_AUTO, sugid_scripts, CTLFLAG_RW | CTLFLAG_LOCKED, &sugid_scripts, 0, "");
static kern_return_t create_unix_stack(vm_map_t map, load_result_t* load_result, proc_t p);
static int copyoutptr(user_addr_t ua, user_addr_t ptr, int ptr_size);
static void exec_resettextvp(proc_t, struct image_params *);
static int check_for_signature(proc_t, struct image_params *);
static void exec_prefault_data(proc_t, struct image_params *, load_result_t *);
-static errno_t exec_handle_port_actions(struct image_params *imgp, boolean_t * portwatch_present, ipc_port_t * portwatch_ports);
-static errno_t exec_handle_spawnattr_policy(proc_t p, int psa_apptype, uint64_t psa_qos_clamp, uint64_t psa_darwin_role,
- ipc_port_t * portwatch_ports, int portwatch_count);
+static errno_t exec_handle_port_actions(struct image_params *imgp,
+ struct exec_port_actions *port_actions);
+static errno_t exec_handle_spawnattr_policy(proc_t p, thread_t thread, int psa_apptype, uint64_t psa_qos_clamp,
+ uint64_t psa_darwin_role, struct exec_port_actions *port_actions);
+static void exec_port_actions_destroy(struct exec_port_actions *port_actions);
/*
* exec_add_user_string
exec_add_user_string(struct image_params *imgp, user_addr_t str, int seg, boolean_t is_ncargs)
{
int error = 0;
-
+
do {
size_t len = 0;
int space;
-
- if (is_ncargs)
+
+ if (is_ncargs) {
space = imgp->ip_argspace; /* by definition smaller than ip_strspace */
- else
+ } else {
space = imgp->ip_strspace;
-
+ }
+
if (space <= 0) {
error = E2BIG;
break;
}
-
+
if (!UIO_SEG_IS_USER_SPACE(seg)) {
- char *kstr = CAST_DOWN(char *,str); /* SAFE */
+ char *kstr = CAST_DOWN(char *, str); /* SAFE */
error = copystr(kstr, imgp->ip_strendp, space, &len);
- } else {
+ } else {
error = copyinstr(str, imgp->ip_strendp, space, &len);
}
imgp->ip_strendp += len;
imgp->ip_strspace -= len;
- if (is_ncargs)
+ if (is_ncargs) {
imgp->ip_argspace -= len;
-
+ }
} while (error == ENAMETOOLONG);
-
+
return error;
}
* dyld is now passed the executable path as a getenv-like variable
* in the same fashion as the stack_guard and malloc_entropy keys.
*/
-#define EXECUTABLE_KEY "executable_path="
+#define EXECUTABLE_KEY "executable_path="
/*
* exec_save_path
len = MIN(MAXPATHLEN, imgp->ip_strspace);
- switch(seg) {
+ switch (seg) {
case UIO_USERSPACE32:
- case UIO_USERSPACE64: /* Same for copyin()... */
+ case UIO_USERSPACE64: /* Same for copyin()... */
error = copyinstr(path, imgp->ip_strings + strlen(EXECUTABLE_KEY), len, &len);
break;
case UIO_SYSSPACE:
- kpath = CAST_DOWN(char *,path); /* SAFE */
+ kpath = CAST_DOWN(char *, path); /* SAFE */
error = copystr(kpath, imgp->ip_strings + strlen(EXECUTABLE_KEY), len, &len);
break;
default:
}
}
- return(error);
+ return error;
}
/*
*
* If we detect a shell script, we need to reset the string area
* state so that the interpreter can be saved onto the stack.
-
+ *
* Parameters; struct image_params * image parameter block
*
* Returns: int 0 Success
{
imgp->ip_strendp = imgp->ip_strings;
imgp->ip_argspace = NCARGS;
- imgp->ip_strspace = ( NCARGS + PAGE_SIZE );
+ imgp->ip_strspace = (NCARGS + PAGE_SIZE);
- return (0);
+ return 0;
}
/*
if (vdata[0] != '#' ||
vdata[1] != '!' ||
(imgp->ip_flags & IMGPF_INTERPRET) != 0) {
- return (-1);
+ return -1;
}
if (imgp->ip_origcputype != 0) {
/* Fat header previously matched, don't allow shell script inside */
- return (-1);
+ return -1;
}
imgp->ip_flags |= IMGPF_INTERPRET;
}
/* Try to find the first non-whitespace character */
- for( ihp = &vdata[2]; ihp < &vdata[IMG_SHSIZE]; ihp++ ) {
+ for (ihp = &vdata[2]; ihp < &vdata[IMG_SHSIZE]; ihp++) {
if (IS_EOL(*ihp)) {
/* Did not find interpreter, "#!\n" */
- return (ENOEXEC);
+ return ENOEXEC;
} else if (IS_WHITESPACE(*ihp)) {
/* Whitespace, like "#! /bin/sh\n", keep going. */
} else {
if (ihp == &vdata[IMG_SHSIZE]) {
/* All whitespace, like "#! " */
- return (ENOEXEC);
+ return ENOEXEC;
}
line_startp = ihp;
/* Try to find the end of the interpreter+args string */
- for ( ; ihp < &vdata[IMG_SHSIZE]; ihp++ ) {
+ for (; ihp < &vdata[IMG_SHSIZE]; ihp++) {
if (IS_EOL(*ihp)) {
/* Got it */
break;
if (ihp == &vdata[IMG_SHSIZE]) {
/* A long line, like "#! blah blah blah" without end */
- return (ENOEXEC);
+ return ENOEXEC;
}
/* Backtrack until we find the last non-whitespace */
/* copy the interpreter name */
interp = imgp->ip_interp_buffer;
- for ( ihp = line_startp; (ihp < line_endp) && !IS_WHITESPACE(*ihp); ihp++)
+ for (ihp = line_startp; (ihp < line_endp) && !IS_WHITESPACE(*ihp); ihp++) {
*interp++ = *ihp;
+ }
*interp = '\0';
exec_reset_save_path(imgp);
exec_save_path(imgp, CAST_USER_ADDR_T(imgp->ip_interp_buffer),
- UIO_SYSSPACE, NULL);
+ UIO_SYSSPACE, NULL);
/* Copy the entire interpreter + args for later processing into argv[] */
interp = imgp->ip_interp_buffer;
- for ( ihp = line_startp; (ihp < line_endp); ihp++)
+ for (ihp = line_startp; (ihp < line_endp); ihp++) {
*interp++ = *ihp;
+ }
*interp = '\0';
#if !SECURE_KERNEL
p = vfs_context_proc(imgp->ip_vfs_context);
error = falloc(p, &fp, &fd, imgp->ip_vfs_context);
- if (error)
- return(error);
+ if (error) {
+ return error;
+ }
fp->f_fglob->fg_flag = FREAD;
fp->f_fglob->fg_ops = &vnops;
fp->f_fglob->fg_data = (caddr_t)imgp->ip_vp;
-
+
proc_fdlock(p);
procfdtbl_releasefd(p, fd, NULL);
fp_drop(p, fd, fp, 1);
}
#endif
- return (-3);
+ return -3;
}
* activators should not be given the opportunity to attempt
* to activate the image.
*
- * If we find an encapsulated binary, we make no assertions
+ * If we find an encapsulated binary, we make no assertions
* about its validity; instead, we leave that up to a rescan
* for an activator to claim it, and, if it is claimed by one,
* that activator is responsible for determining validity.
}
lret = fatfile_getbestarch_for_cputype(pref,
- (vm_offset_t)fat_header,
- PAGE_SIZE,
- &fat_arch);
+ (vm_offset_t)fat_header,
+ PAGE_SIZE,
+ imgp,
+ &fat_arch);
if (lret == LOAD_SUCCESS) {
goto use_arch;
}
regular_grading:
/* Look up our preferred architecture in the fat file. */
lret = fatfile_getbestarch((vm_offset_t)fat_header,
- PAGE_SIZE,
- &fat_arch);
+ PAGE_SIZE,
+ imgp,
+ &fat_arch);
if (lret != LOAD_SUCCESS) {
error = load_return_to_errno(lret);
goto bad;
use_arch:
/* Read the Mach-O header out of fat_arch */
error = vn_rdwr(UIO_READ, imgp->ip_vp, imgp->ip_vdata,
- PAGE_SIZE, fat_arch.offset,
- UIO_SYSSPACE, (IO_UNIT|IO_NODELOCKED),
- cred, &resid, p);
+ PAGE_SIZE, fat_arch.offset,
+ UIO_SYSSPACE, (IO_UNIT | IO_NODELOCKED),
+ cred, &resid, p);
if (error) {
goto bad;
}
bad:
kauth_cred_unref(&cred);
- return (error);
+ return error;
}
static int
int ret;
task_set_dyld_info(task, MACH_VM_MIN_ADDRESS, 0);
- if (result->is64bit) {
- task_set_64bit(task, TRUE);
+ task_set_64bit(task, result->is_64bit_addr, result->is_64bit_data);
+ if (result->is_64bit_addr) {
OSBitOrAtomic(P_LP64, &p->p_flag);
} else {
- task_set_64bit(task, FALSE);
OSBitAndAtomic(~((uint32_t)P_LP64), &p->p_flag);
}
+ task_set_mach_header_address(task, result->mach_header);
ret = thread_state_initialize(thread);
if (ret != KERN_SUCCESS) {
}
bcopy((caddr_t)imgp->ip_ndp->ni_cnd.cn_nameptr, (caddr_t)p->p_name,
- (unsigned)imgp->ip_ndp->ni_cnd.cn_namelen);
+ (unsigned)imgp->ip_ndp->ni_cnd.cn_namelen);
p->p_name[imgp->ip_ndp->ni_cnd.cn_namelen] = '\0';
if (imgp->ip_ndp->ni_cnd.cn_namelen > MAXCOMLEN) {
}
bcopy((caddr_t)imgp->ip_ndp->ni_cnd.cn_nameptr, (caddr_t)p->p_comm,
- (unsigned)imgp->ip_ndp->ni_cnd.cn_namelen);
+ (unsigned)imgp->ip_ndp->ni_cnd.cn_namelen);
p->p_comm[imgp->ip_ndp->ni_cnd.cn_namelen] = '\0';
}
-static uint64_t get_va_fsid(struct vnode_attr *vap)
-{
- if (VATTR_IS_SUPPORTED(vap, va_fsid64)) {
- return *(uint64_t *)&vap->va_fsid64;
- } else {
- return vap->va_fsid;
- }
-}
-
/*
* exec_mach_imgact
*
exec_mach_imgact(struct image_params *imgp)
{
struct mach_header *mach_header = (struct mach_header *)imgp->ip_vdata;
- proc_t p = vfs_context_proc(imgp->ip_vfs_context);
- int error = 0;
- task_t task;
- task_t new_task = NULL; /* protected by vfexec */
- thread_t thread;
- struct uthread *uthread;
+ proc_t p = vfs_context_proc(imgp->ip_vfs_context);
+ int error = 0;
+ task_t task;
+ task_t new_task = NULL; /* protected by vfexec */
+ thread_t thread;
+ struct uthread *uthread;
vm_map_t old_map = VM_MAP_NULL;
vm_map_t map = VM_MAP_NULL;
- load_return_t lret;
- load_result_t load_result;
+ load_return_t lret;
+ load_result_t load_result = {};
struct _posix_spawnattr *psa = NULL;
- int spawn = (imgp->ip_flags & IMGPF_SPAWN);
- int vfexec = (imgp->ip_flags & IMGPF_VFORK_EXEC);
- int exec = (imgp->ip_flags & IMGPF_EXEC);
- os_reason_t exec_failure_reason = OS_REASON_NULL;
+ int spawn = (imgp->ip_flags & IMGPF_SPAWN);
+ int vfexec = (imgp->ip_flags & IMGPF_VFORK_EXEC);
+ int exec = (imgp->ip_flags & IMGPF_EXEC);
+ os_reason_t exec_failure_reason = OS_REASON_NULL;
/*
* make sure it's a Mach-O 1.0 or Mach-O 2.0 binary; the difference
* is a reserved field on the end, so for the most part, we can
* treat them as if they were identical. Reverse-endian Mach-O
* binaries are recognized but not compatible.
- */
+ */
if ((mach_header->magic == MH_CIGAM) ||
(mach_header->magic == MH_CIGAM_64)) {
error = EBADARCH;
if (imgp->ip_origcputype != 0) {
/* Fat header previously had an idea about this thin file */
if (imgp->ip_origcputype != mach_header->cputype ||
- imgp->ip_origcpusubtype != mach_header->cpusubtype) {
+ imgp->ip_origcpusubtype != mach_header->cpusubtype) {
error = EBADARCH;
goto bad;
}
thread = current_thread();
uthread = get_bsdthread_info(thread);
- if ((mach_header->cputype & CPU_ARCH_ABI64) == CPU_ARCH_ABI64)
- imgp->ip_flags |= IMGPF_IS_64BIT;
+ if ((mach_header->cputype & CPU_ARCH_ABI64) == CPU_ARCH_ABI64) {
+ imgp->ip_flags |= IMGPF_IS_64BIT_ADDR | IMGPF_IS_64BIT_DATA;
+ }
/* If posix_spawn binprefs exist, respect those prefs. */
psa = (struct _posix_spawnattr *) imgp->ip_px_sa;
goto bad;
}
grade:
- if (!grade_binary(imgp->ip_origcputype, imgp->ip_origcpusubtype & ~CPU_SUBTYPE_MASK)) {
+ if (!grade_binary(imgp->ip_origcputype, imgp->ip_origcpusubtype & ~CPU_SUBTYPE_MASK, TRUE)) {
+ error = EBADARCH;
+ goto bad;
+ }
+
+ if (validate_potential_simulator_binary(imgp->ip_origcputype, imgp,
+ imgp->ip_arch_offset, imgp->ip_arch_size) != LOAD_SUCCESS) {
+#if __x86_64__
+ const char *excpath;
+ error = exec_save_path(imgp, imgp->ip_user_fname, imgp->ip_seg, &excpath);
+ os_log_error(OS_LOG_DEFAULT, "Unsupported 32-bit executable: \"%s\"", (error) ? imgp->ip_vp->v_name : excpath);
+#endif
error = EBADARCH;
goto bad;
}
+#if defined(HAS_APPLE_PAC)
+ assert(mach_header->cputype == CPU_TYPE_ARM64
+ );
+
+ if (((mach_header->cputype == CPU_TYPE_ARM64 &&
+ (mach_header->cpusubtype & ~CPU_SUBTYPE_MASK) == CPU_SUBTYPE_ARM64E)
+ ) && (CPU_SUBTYPE_ARM64_PTR_AUTH_VERSION(mach_header->cpusubtype) == 0)) {
+ imgp->ip_flags &= ~IMGPF_NOJOP;
+ } else {
+ imgp->ip_flags |= IMGPF_NOJOP;
+ }
+#endif
+
/* Copy in arguments/environment from the old process */
error = exec_extract_strings(imgp);
- if (error)
+ if (error) {
goto bad;
+ }
- AUDIT_ARG(argv, imgp->ip_startargv, imgp->ip_argc,
+ AUDIT_ARG(argv, imgp->ip_startargv, imgp->ip_argc,
imgp->ip_endargv - imgp->ip_startargv);
AUDIT_ARG(envv, imgp->ip_endargv, imgp->ip_envc,
imgp->ip_endenvv - imgp->ip_endargv);
* new child process.
*/
if (vfexec) {
- imgp->ip_new_thread = fork_create_child(task, NULL, p, FALSE, (imgp->ip_flags & IMGPF_IS_64BIT), FALSE);
+ imgp->ip_new_thread = fork_create_child(task,
+ NULL,
+ p,
+ FALSE,
+ (imgp->ip_flags & IMGPF_IS_64BIT_ADDR),
+ (imgp->ip_flags & IMGPF_IS_64BIT_DATA),
+ FALSE);
/* task and thread ref returned, will be released in __mac_execve */
if (imgp->ip_new_thread == NULL) {
error = ENOMEM;
error = load_return_to_errno(lret);
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_BAD_MACHO, 0, 0);
+ p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_BAD_MACHO, 0, 0);
if (lret == LOAD_BADMACHO_UPX) {
- /* set anything that might be useful in the crash report */
set_proc_name(imgp, p);
-
exec_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_UPX);
exec_failure_reason->osr_flags |= OS_REASON_FLAG_GENERATE_CRASH_REPORT;
- exec_failure_reason->osr_flags |= OS_REASON_FLAG_CONSISTENT_FAILURE;
} else {
exec_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_BAD_MACHO);
+
+ if (bootarg_execfailurereports) {
+ set_proc_name(imgp, p);
+ exec_failure_reason->osr_flags |= OS_REASON_FLAG_GENERATE_CRASH_REPORT;
+ }
}
+ exec_failure_reason->osr_flags |= OS_REASON_FLAG_CONSISTENT_FAILURE;
+
goto badtoolate;
}
proc_lock(p);
p->p_cputype = imgp->ip_origcputype;
p->p_cpusubtype = imgp->ip_origcpusubtype;
+ p->p_platform = load_result.ip_platform;
+ p->p_sdk = load_result.lr_sdk;
proc_unlock(p);
vm_map_set_user_wire_limit(map, p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur);
- /*
+ /*
* Set code-signing flags if this binary is signed, or if parent has
* requested them on exec.
*/
if (load_result.csflags & CS_VALID) {
- imgp->ip_csflags |= load_result.csflags &
- (CS_VALID|CS_SIGNED|CS_DEV_CODE|
- CS_HARD|CS_KILL|CS_RESTRICT|CS_ENFORCEMENT|CS_REQUIRE_LV|
- CS_ENTITLEMENTS_VALIDATED|CS_DYLD_PLATFORM|
- CS_ENTITLEMENT_FLAGS|
- CS_EXEC_SET_HARD|CS_EXEC_SET_KILL|CS_EXEC_SET_ENFORCEMENT);
+ imgp->ip_csflags |= load_result.csflags &
+ (CS_VALID | CS_SIGNED | CS_DEV_CODE |
+ CS_HARD | CS_KILL | CS_RESTRICT | CS_ENFORCEMENT | CS_REQUIRE_LV |
+ CS_FORCED_LV | CS_ENTITLEMENTS_VALIDATED | CS_DYLD_PLATFORM | CS_RUNTIME |
+ CS_ENTITLEMENT_FLAGS |
+ CS_EXEC_SET_HARD | CS_EXEC_SET_KILL | CS_EXEC_SET_ENFORCEMENT);
} else {
imgp->ip_csflags &= ~CS_VALID;
}
- if (p->p_csflags & CS_EXEC_SET_HARD)
+ if (p->p_csflags & CS_EXEC_SET_HARD) {
imgp->ip_csflags |= CS_HARD;
- if (p->p_csflags & CS_EXEC_SET_KILL)
+ }
+ if (p->p_csflags & CS_EXEC_SET_KILL) {
imgp->ip_csflags |= CS_KILL;
- if (p->p_csflags & CS_EXEC_SET_ENFORCEMENT)
+ }
+ if (p->p_csflags & CS_EXEC_SET_ENFORCEMENT) {
imgp->ip_csflags |= CS_ENFORCEMENT;
+ }
if (p->p_csflags & CS_EXEC_INHERIT_SIP) {
- if (p->p_csflags & CS_INSTALLER)
+ if (p->p_csflags & CS_INSTALLER) {
imgp->ip_csflags |= CS_INSTALLER;
- if (p->p_csflags & CS_DATAVAULT_CONTROLLER)
+ }
+ if (p->p_csflags & CS_DATAVAULT_CONTROLLER) {
imgp->ip_csflags |= CS_DATAVAULT_CONTROLLER;
- if (p->p_csflags & CS_NVRAM_UNRESTRICTED)
+ }
+ if (p->p_csflags & CS_NVRAM_UNRESTRICTED) {
imgp->ip_csflags |= CS_NVRAM_UNRESTRICTED;
+ }
}
/*
* Set up the system reserved areas in the new address space.
*/
- vm_map_exec(map, task, load_result.is64bit, (void *)p->p_fd->fd_rdir, cpu_type());
+ int cpu_subtype;
+ cpu_subtype = 0; /* all cpu_subtypes use the same shared region */
+#if defined(HAS_APPLE_PAC)
+ if (cpu_type() == CPU_TYPE_ARM64 &&
+ (p->p_cpusubtype & ~CPU_SUBTYPE_MASK) == CPU_SUBTYPE_ARM64E) {
+ assertf(p->p_cputype == CPU_TYPE_ARM64,
+ "p %p cpu_type() 0x%x p->p_cputype 0x%x p->p_cpusubtype 0x%x",
+ p, cpu_type(), p->p_cputype, p->p_cpusubtype);
+ /*
+ * arm64e uses pointer authentication, so request a separate
+ * shared region for this CPU subtype.
+ */
+ cpu_subtype = p->p_cpusubtype & ~CPU_SUBTYPE_MASK;
+ }
+#endif /* HAS_APPLE_PAC */
+ vm_map_exec(map, task, load_result.is_64bit_addr, (void *)p->p_fd->fd_rdir, cpu_type(), cpu_subtype);
/*
* Close file descriptors which specify close-on-exec.
vm_map_deallocate(map);
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_SUGID_FAILURE, 0, 0);
+ p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_SUGID_FAILURE, 0, 0);
+
exec_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_SUGID_FAILURE);
+ if (bootarg_execfailurereports) {
+ set_proc_name(imgp, p);
+ exec_failure_reason->osr_flags |= OS_REASON_FLAG_GENERATE_CRASH_REPORT;
+ }
+
goto badtoolate;
}
lret = activate_exec_state(task, p, thread, &load_result);
if (lret != KERN_SUCCESS) {
-
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_ACTV_THREADSTATE, 0, 0);
+ p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_ACTV_THREADSTATE, 0, 0);
+
exec_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_ACTV_THREADSTATE);
+ if (bootarg_execfailurereports) {
+ set_proc_name(imgp, p);
+ exec_failure_reason->osr_flags |= OS_REASON_FLAG_GENERATE_CRASH_REPORT;
+ }
+
goto badtoolate;
}
/*
* deal with voucher on exec-calling thread.
*/
- if (imgp->ip_new_thread == NULL)
+ if (imgp->ip_new_thread == NULL) {
thread_set_mach_voucher(current_thread(), IPC_VOUCHER_NULL);
+ }
/* Make sure we won't interrupt ourself signalling a partial process */
- if (!vfexec && !spawn && (p->p_lflag & P_LTRACED))
+ if (!vfexec && !spawn && (p->p_lflag & P_LTRACED)) {
psignal(p, SIGTRAP);
+ }
if (load_result.unixproc &&
- create_unix_stack(get_task_map(task),
- &load_result,
- p) != KERN_SUCCESS) {
+ create_unix_stack(get_task_map(task),
+ &load_result,
+ p) != KERN_SUCCESS) {
error = load_return_to_errno(LOAD_NOSPACE);
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_STACK_ALLOC, 0, 0);
+ p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_STACK_ALLOC, 0, 0);
+
exec_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_STACK_ALLOC);
+ if (bootarg_execfailurereports) {
+ set_proc_name(imgp, p);
+ exec_failure_reason->osr_flags |= OS_REASON_FLAG_GENERATE_CRASH_REPORT;
+ }
+
goto badtoolate;
}
error = exec_add_apple_strings(imgp, &load_result);
if (error) {
-
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_APPLE_STRING_INIT, 0, 0);
+ p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_APPLE_STRING_INIT, 0, 0);
+
exec_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_APPLE_STRING_INIT);
+ if (bootarg_execfailurereports) {
+ set_proc_name(imgp, p);
+ exec_failure_reason->osr_flags |= OS_REASON_FLAG_GENERATE_CRASH_REPORT;
+ }
goto badtoolate;
}
old_map = vm_map_switch(get_task_map(task));
if (load_result.unixproc) {
- user_addr_t ap;
+ user_addr_t ap;
/*
* Copy the strings area out into the new process address
vm_map_switch(old_map);
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_COPYOUT_STRINGS, 0, 0);
+ p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_COPYOUT_STRINGS, 0, 0);
+
exec_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_COPYOUT_STRINGS);
+ if (bootarg_execfailurereports) {
+ set_proc_name(imgp, p);
+ exec_failure_reason->osr_flags |= OS_REASON_FLAG_GENERATE_CRASH_REPORT;
+ }
goto badtoolate;
}
/* Set the stack */
}
if (load_result.dynlinker) {
- uint64_t ap;
- int new_ptr_size = (imgp->ip_flags & IMGPF_IS_64BIT) ? 8 : 4;
+ uint64_t ap;
+ int new_ptr_size = (imgp->ip_flags & IMGPF_IS_64BIT_ADDR) ? 8 : 4;
/* Adjust the stack */
ap = thread_adjuserstack(thread, -new_ptr_size);
vm_map_switch(old_map);
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_COPYOUT_DYNLINKER, 0, 0);
+ p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_COPYOUT_DYNLINKER, 0, 0);
+
exec_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_COPYOUT_DYNLINKER);
+ if (bootarg_execfailurereports) {
+ set_proc_name(imgp, p);
+ exec_failure_reason->osr_flags |= OS_REASON_FLAG_GENERATE_CRASH_REPORT;
+ }
goto badtoolate;
}
task_set_dyld_info(task, load_result.all_image_info_addr,
vm_map_switch(old_map);
- /* Stop profiling */
- stopprofclock(p);
-
/*
* Reset signal state.
*/
#if SYSV_SHM
/* FIXME: Till vmspace inherit is fixed: */
- if (!vfexec && p->vm_shm)
+ if (!vfexec && p->vm_shm) {
shmexec(p);
+ }
#endif
#if SYSV_SEM
/* Clean up the semaphores */
if (secluded_for_apps &&
load_result.platform_binary) {
if (strncmp(p->p_name,
- "Camera",
- sizeof (p->p_name)) == 0) {
+ "Camera",
+ sizeof(p->p_name)) == 0) {
task_set_could_use_secluded_mem(task, TRUE);
} else {
task_set_could_use_secluded_mem(task, FALSE);
}
if (strncmp(p->p_name,
- "mediaserverd",
- sizeof (p->p_name)) == 0) {
+ "mediaserverd",
+ sizeof(p->p_name)) == 0) {
task_set_could_also_use_secluded_mem(task, TRUE);
}
}
#endif /* CONFIG_SECLUDED_MEMORY */
+#if __arm64__
+ if (load_result.legacy_footprint) {
+ task_set_legacy_footprint(task);
+ }
+#endif /* __arm64__ */
+
pal_dbg_set_task_name(task);
/*
#endif
if (kdebug_enable) {
- long dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4;
-
- /*
- * Collect the pathname for tracing
- */
- kdbg_trace_string(p, &dbg_arg1, &dbg_arg2, &dbg_arg3, &dbg_arg4);
+ long args[4] = {};
uintptr_t fsid = 0, fileid = 0;
if (imgp->ip_vattr) {
- uint64_t fsid64 = get_va_fsid(imgp->ip_vattr);
+ uint64_t fsid64 = vnode_get_va_fsid(imgp->ip_vattr);
fsid = fsid64;
fileid = imgp->ip_vattr->va_fileid;
// check for (unexpected) overflow and trace zero in that case
fsid = fileid = 0;
}
}
- KERNEL_DEBUG_CONSTANT1(TRACE_DATA_EXEC | DBG_FUNC_NONE,
- p->p_pid , fsid, fileid, 0, (uintptr_t)thread_tid(thread));
- KERNEL_DEBUG_CONSTANT1(TRACE_STRING_EXEC | DBG_FUNC_NONE,
- dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4, (uintptr_t)thread_tid(thread));
+ KERNEL_DEBUG_CONSTANT_IST1(TRACE_DATA_EXEC, p->p_pid, fsid, fileid, 0,
+ (uintptr_t)thread_tid(thread));
+
+ /*
+ * Collect the pathname for tracing
+ */
+ kdbg_trace_string(p, &args[0], &args[1], &args[2], &args[3]);
+ KERNEL_DEBUG_CONSTANT_IST1(TRACE_STRING_EXEC, args[0], args[1],
+ args[2], args[3], (uintptr_t)thread_tid(thread));
}
/*
os_reason_free(exec_failure_reason);
exec_failure_reason = OS_REASON_NULL;
}
-
+
done:
if (load_result.threadstate) {
kfree(load_result.threadstate, load_result.threadstate_sz);
bad:
/* If we hit this, we likely would have leaked an exit reason */
assert(exec_failure_reason == OS_REASON_NULL);
- return(error);
+ return error;
}
* XXX hardcoded, for now; should use linker sets
*/
struct execsw {
- int (*ex_imgact)(struct image_params *);
+ int(*const ex_imgact)(struct image_params *);
const char *ex_name;
-} execsw[] = {
- { exec_mach_imgact, "Mach-o Binary" },
- { exec_fat_imgact, "Fat Binary" },
- { exec_shell_imgact, "Interpreter Script" },
+}const execsw[] = {
+ { exec_mach_imgact, "Mach-o Binary" },
+ { exec_fat_imgact, "Fat Binary" },
+ { exec_shell_imgact, "Interpreter Script" },
{ NULL, NULL}
};
const char *excpath;
int error;
int resid;
- int once = 1; /* save SGUID-ness for interpreted files */
+ int once = 1; /* save SGUID-ness for interpreted files */
int i;
int itercount = 0;
proc_t p = vfs_context_proc(imgp->ip_vfs_context);
error = execargs_alloc(imgp);
- if (error)
+ if (error) {
goto bad_notrans;
-
+ }
+
error = exec_save_path(imgp, imgp->ip_user_fname, imgp->ip_seg, &excpath);
if (error) {
goto bad_notrans;
}
NDINIT(ndp, LOOKUP, OP_LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1,
- UIO_SYSSPACE, CAST_USER_ADDR_T(excpath), imgp->ip_vfs_context);
+ UIO_SYSSPACE, CAST_USER_ADDR_T(excpath), imgp->ip_vfs_context);
again:
error = namei(ndp);
- if (error)
+ if (error) {
goto bad_notrans;
- imgp->ip_ndp = ndp; /* successful namei(); call nameidone() later */
- imgp->ip_vp = ndp->ni_vp; /* if set, need to vnode_put() at some point */
+ }
+ imgp->ip_ndp = ndp; /* successful namei(); call nameidone() later */
+ imgp->ip_vp = ndp->ni_vp; /* if set, need to vnode_put() at some point */
/*
* Before we start the transition from binary A to binary B, make
}
error = proc_transstart(p, 1, 0);
proc_unlock(p);
- if (error)
+ if (error) {
goto bad_notrans;
+ }
error = exec_check_permissions(imgp);
- if (error)
+ if (error) {
goto bad;
+ }
/* Copy; avoid invocation of an interpreter overwriting the original */
if (once) {
}
error = vn_rdwr(UIO_READ, imgp->ip_vp, imgp->ip_vdata, PAGE_SIZE, 0,
- UIO_SYSSPACE, IO_NODELOCKED,
- vfs_context_ucred(imgp->ip_vfs_context),
- &resid, vfs_context_proc(imgp->ip_vfs_context));
- if (error)
+ UIO_SYSSPACE, IO_NODELOCKED,
+ vfs_context_ucred(imgp->ip_vfs_context),
+ &resid, vfs_context_proc(imgp->ip_vfs_context));
+ if (error) {
goto bad;
+ }
if (resid) {
memset(imgp->ip_vdata + (PAGE_SIZE - resid), 0x0, resid);
goto bad;
}
error = -1;
- for(i = 0; error == -1 && execsw[i].ex_imgact != NULL; i++) {
-
+ for (i = 0; error == -1 && execsw[i].ex_imgact != NULL; i++) {
error = (*execsw[i].ex_imgact)(imgp);
switch (error) {
/* case -1: not claimed: continue */
- case -2: /* Encapsulated binary, imgp->ip_XXX set for next iteration */
+ case -2: /* Encapsulated binary, imgp->ip_XXX set for next iteration */
goto encapsulated_binary;
- case -3: /* Interpreter */
+ case -3: /* Interpreter */
#if CONFIG_MACF
/*
* Copy the script label for later use. Note that
* the label can be different when the script is
* actually read by the interpreter.
*/
- if (imgp->ip_scriptlabelp)
+ if (imgp->ip_scriptlabelp) {
mac_vnode_label_free(imgp->ip_scriptlabelp);
+ }
imgp->ip_scriptlabelp = mac_vnode_label_alloc();
if (imgp->ip_scriptlabelp == NULL) {
error = ENOMEM;
break;
}
mac_vnode_label_copy(imgp->ip_vp->v_label,
- imgp->ip_scriptlabelp);
+ imgp->ip_scriptlabelp);
/*
* Take a ref of the script vnode for later use.
*/
- if (imgp->ip_scriptvp)
+ if (imgp->ip_scriptvp) {
vnode_put(imgp->ip_scriptvp);
- if (vnode_getwithref(imgp->ip_vp) == 0)
+ imgp->ip_scriptvp = NULLVP;
+ }
+ if (vnode_getwithref(imgp->ip_vp) == 0) {
imgp->ip_scriptvp = imgp->ip_vp;
+ }
#endif
nameidone(ndp);
vnode_put(imgp->ip_vp);
- imgp->ip_vp = NULL; /* already put */
+ imgp->ip_vp = NULL; /* already put */
imgp->ip_ndp = NULL; /* already nameidone */
/* Use excpath, which exec_shell_imgact reset to the interpreter */
NDINIT(ndp, LOOKUP, OP_LOOKUP, FOLLOW | LOCKLEAF,
- UIO_SYSSPACE, CAST_USER_ADDR_T(excpath), imgp->ip_vfs_context);
+ UIO_SYSSPACE, CAST_USER_ADDR_T(excpath), imgp->ip_vfs_context);
proc_transend(p, 0);
goto again;
}
}
- /*
- * Call out to allow 3rd party notification of exec.
- * Ignore result of kauth_authorize_fileop call.
- */
- if (error == 0 && kauth_authorize_fileop_has_listeners()) {
- kauth_authorize_fileop(vfs_context_ucred(imgp->ip_vfs_context),
- KAUTH_FILEOP_EXEC,
- (uintptr_t)ndp->ni_vp, 0);
+ if (error == 0) {
+ if (imgp->ip_flags & IMGPF_INTERPRET && ndp->ni_vp) {
+ AUDIT_ARG(vnpath, ndp->ni_vp, ARG_VNODE2);
+ }
+
+ /*
+ * Call out to allow 3rd party notification of exec.
+ * Ignore result of kauth_authorize_fileop call.
+ */
+ if (kauth_authorize_fileop_has_listeners()) {
+ kauth_authorize_fileop(vfs_context_ucred(imgp->ip_vfs_context),
+ KAUTH_FILEOP_EXEC,
+ (uintptr_t)ndp->ni_vp, 0);
+ }
}
bad:
proc_transend(p, 0);
bad_notrans:
- if (imgp->ip_strings)
+ if (imgp->ip_strings) {
execargs_free(imgp);
- if (imgp->ip_ndp)
+ }
+ if (imgp->ip_ndp) {
nameidone(imgp->ip_ndp);
- if (ndp)
+ }
+ if (ndp) {
FREE(ndp, M_TEMP);
+ }
- return (error);
+ return error;
}
+/*
+ * exec_validate_spawnattr_policy
+ *
+ * Description: Validates the entitlements required to set the apptype.
+ *
+ * Parameters: int psa_apptype posix spawn attribute apptype
+ *
+ * Returns: 0 Success
+ * EPERM Failure
+ */
+static errno_t
+exec_validate_spawnattr_policy(int psa_apptype)
+{
+ if ((psa_apptype & POSIX_SPAWN_PROC_TYPE_MASK) != 0) {
+ int proctype = psa_apptype & POSIX_SPAWN_PROC_TYPE_MASK;
+ if (proctype == POSIX_SPAWN_PROC_TYPE_DRIVER) {
+ if (!IOTaskHasEntitlement(current_task(), POSIX_SPAWN_ENTITLEMENT_DRIVER)) {
+ return EPERM;
+ }
+ }
+ }
+
+ return 0;
+}
/*
* exec_handle_spawnattr_policy
* Returns: 0 Success
*/
static errno_t
-exec_handle_spawnattr_policy(proc_t p, int psa_apptype, uint64_t psa_qos_clamp, uint64_t psa_darwin_role,
- ipc_port_t * portwatch_ports, int portwatch_count)
+exec_handle_spawnattr_policy(proc_t p, thread_t thread, int psa_apptype, uint64_t psa_qos_clamp,
+ uint64_t psa_darwin_role, struct exec_port_actions *port_actions)
{
int apptype = TASK_APPTYPE_NONE;
int qos_clamp = THREAD_QOS_UNSPECIFIED;
if ((psa_apptype & POSIX_SPAWN_PROC_TYPE_MASK) != 0) {
int proctype = psa_apptype & POSIX_SPAWN_PROC_TYPE_MASK;
- switch(proctype) {
- case POSIX_SPAWN_PROC_TYPE_DAEMON_INTERACTIVE:
- apptype = TASK_APPTYPE_DAEMON_INTERACTIVE;
- break;
- case POSIX_SPAWN_PROC_TYPE_DAEMON_STANDARD:
- apptype = TASK_APPTYPE_DAEMON_STANDARD;
- break;
- case POSIX_SPAWN_PROC_TYPE_DAEMON_ADAPTIVE:
- apptype = TASK_APPTYPE_DAEMON_ADAPTIVE;
- break;
- case POSIX_SPAWN_PROC_TYPE_DAEMON_BACKGROUND:
- apptype = TASK_APPTYPE_DAEMON_BACKGROUND;
- break;
- case POSIX_SPAWN_PROC_TYPE_APP_DEFAULT:
- apptype = TASK_APPTYPE_APP_DEFAULT;
- break;
+ switch (proctype) {
+ case POSIX_SPAWN_PROC_TYPE_DAEMON_INTERACTIVE:
+ apptype = TASK_APPTYPE_DAEMON_INTERACTIVE;
+ break;
+ case POSIX_SPAWN_PROC_TYPE_DAEMON_STANDARD:
+ apptype = TASK_APPTYPE_DAEMON_STANDARD;
+ break;
+ case POSIX_SPAWN_PROC_TYPE_DAEMON_ADAPTIVE:
+ apptype = TASK_APPTYPE_DAEMON_ADAPTIVE;
+ break;
+ case POSIX_SPAWN_PROC_TYPE_DAEMON_BACKGROUND:
+ apptype = TASK_APPTYPE_DAEMON_BACKGROUND;
+ break;
+ case POSIX_SPAWN_PROC_TYPE_APP_DEFAULT:
+ apptype = TASK_APPTYPE_APP_DEFAULT;
+ break;
#if !CONFIG_EMBEDDED
- case POSIX_SPAWN_PROC_TYPE_APP_TAL:
- apptype = TASK_APPTYPE_APP_TAL;
- break;
+ case POSIX_SPAWN_PROC_TYPE_APP_TAL:
+ apptype = TASK_APPTYPE_APP_TAL;
+ break;
#endif /* !CONFIG_EMBEDDED */
- default:
- apptype = TASK_APPTYPE_NONE;
- /* TODO: Should an invalid value here fail the spawn? */
- break;
+ case POSIX_SPAWN_PROC_TYPE_DRIVER:
+ apptype = TASK_APPTYPE_DRIVER;
+ break;
+ default:
+ apptype = TASK_APPTYPE_NONE;
+ /* TODO: Should an invalid value here fail the spawn? */
+ break;
}
}
if (psa_qos_clamp != POSIX_SPAWN_PROC_CLAMP_NONE) {
switch (psa_qos_clamp) {
- case POSIX_SPAWN_PROC_CLAMP_UTILITY:
- qos_clamp = THREAD_QOS_UTILITY;
- break;
- case POSIX_SPAWN_PROC_CLAMP_BACKGROUND:
- qos_clamp = THREAD_QOS_BACKGROUND;
- break;
- case POSIX_SPAWN_PROC_CLAMP_MAINTENANCE:
- qos_clamp = THREAD_QOS_MAINTENANCE;
- break;
- default:
- qos_clamp = THREAD_QOS_UNSPECIFIED;
- /* TODO: Should an invalid value here fail the spawn? */
- break;
+ case POSIX_SPAWN_PROC_CLAMP_UTILITY:
+ qos_clamp = THREAD_QOS_UTILITY;
+ break;
+ case POSIX_SPAWN_PROC_CLAMP_BACKGROUND:
+ qos_clamp = THREAD_QOS_BACKGROUND;
+ break;
+ case POSIX_SPAWN_PROC_CLAMP_MAINTENANCE:
+ qos_clamp = THREAD_QOS_MAINTENANCE;
+ break;
+ default:
+ qos_clamp = THREAD_QOS_UNSPECIFIED;
+ /* TODO: Should an invalid value here fail the spawn? */
+ break;
}
}
proc_darwin_role_to_task_role(psa_darwin_role, &role);
}
- if (apptype != TASK_APPTYPE_NONE ||
+ if (apptype != TASK_APPTYPE_NONE ||
qos_clamp != THREAD_QOS_UNSPECIFIED ||
- role != TASK_UNSPECIFIED) {
- proc_set_task_spawnpolicy(p->task, apptype, qos_clamp, role,
- portwatch_ports, portwatch_count);
+ role != TASK_UNSPECIFIED ||
+ port_actions->portwatch_count) {
+ proc_set_task_spawnpolicy(p->task, thread, apptype, qos_clamp, role,
+ port_actions->portwatch_array, port_actions->portwatch_count);
+ }
+
+ if (port_actions->registered_count) {
+ if (mach_ports_register(p->task, port_actions->registered_array,
+ port_actions->registered_count)) {
+ return EINVAL;
+ }
+ /* mach_ports_register() consumed the array */
+ port_actions->registered_array = NULL;
+ port_actions->registered_count = 0;
}
- return (0);
+ return 0;
}
+static void
+exec_port_actions_destroy(struct exec_port_actions *port_actions)
+{
+ if (port_actions->portwatch_array) {
+ for (uint32_t i = 0; i < port_actions->portwatch_count; i++) {
+ ipc_port_t port = NULL;
+ if ((port = port_actions->portwatch_array[i]) != NULL) {
+ ipc_port_release_send(port);
+ }
+ }
+ kfree(port_actions->portwatch_array,
+ port_actions->portwatch_count * sizeof(ipc_port_t *));
+ }
+
+ if (port_actions->registered_array) {
+ for (uint32_t i = 0; i < port_actions->registered_count; i++) {
+ ipc_port_t port = NULL;
+ if ((port = port_actions->registered_array[i]) != NULL) {
+ ipc_port_release_send(port);
+ }
+ }
+ kfree(port_actions->registered_array,
+ port_actions->registered_count * sizeof(ipc_port_t *));
+ }
+}
/*
* exec_handle_port_actions
*
- * Description: Go through the _posix_port_actions_t contents,
- * calling task_set_special_port, task_set_exception_ports
- * and/or audit_session_spawnjoin for the current task.
+ * Description: Go through the _posix_port_actions_t contents,
+ * calling task_set_special_port, task_set_exception_ports
+ * and/or audit_session_spawnjoin for the current task.
*
* Parameters: struct image_params * Image parameter block
*
* Returns: 0 Success
- * EINVAL Failure
- * ENOTSUP Illegal posix_spawn attr flag was set
+ * EINVAL Failure
+ * ENOTSUP Illegal posix_spawn attr flag was set
*/
static errno_t
-exec_handle_port_actions(struct image_params *imgp, boolean_t * portwatch_present,
- ipc_port_t * portwatch_ports)
+exec_handle_port_actions(struct image_params *imgp,
+ struct exec_port_actions *actions)
{
_posix_spawn_port_actions_t pacts = imgp->ip_px_spa;
#if CONFIG_AUDIT
task_t task = get_threadtask(imgp->ip_new_thread);
ipc_port_t port = NULL;
errno_t ret = 0;
- int i;
+ int i, portwatch_i = 0, registered_i = 0;
kern_return_t kr;
+ boolean_t task_has_watchport_boost = task_has_watchports(current_task());
+ boolean_t in_exec = (imgp->ip_flags & IMGPF_EXEC);
+ boolean_t suid_cred_specified = FALSE;
+
+ for (i = 0; i < pacts->pspa_count; i++) {
+ act = &pacts->pspa_actions[i];
+
+ switch (act->port_type) {
+ case PSPA_SPECIAL:
+ case PSPA_EXCEPTION:
+#if CONFIG_AUDIT
+ case PSPA_AU_SESSION:
+#endif
+ break;
+ case PSPA_IMP_WATCHPORTS:
+ if (++actions->portwatch_count > TASK_MAX_WATCHPORT_COUNT) {
+ ret = EINVAL;
+ goto done;
+ }
+ break;
+ case PSPA_REGISTERED_PORTS:
+ if (++actions->registered_count > TASK_PORT_REGISTER_MAX) {
+ ret = EINVAL;
+ goto done;
+ }
+ break;
+
+ case PSPA_SUID_CRED:
+ /* Only a single suid credential can be specified. */
+ if (suid_cred_specified) {
+ ret = EINVAL;
+ goto done;
+ }
+ suid_cred_specified = TRUE;
+ break;
+
+ default:
+ ret = EINVAL;
+ goto done;
+ }
+ }
+
+ if (actions->portwatch_count) {
+ if (in_exec && task_has_watchport_boost) {
+ ret = EINVAL;
+ goto done;
+ }
+ actions->portwatch_array =
+ kalloc(sizeof(ipc_port_t *) * actions->portwatch_count);
+ if (actions->portwatch_array == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
+ bzero(actions->portwatch_array,
+ sizeof(ipc_port_t *) * actions->portwatch_count);
+ }
- *portwatch_present = FALSE;
+ if (actions->registered_count) {
+ actions->registered_array =
+ kalloc(sizeof(ipc_port_t *) * actions->registered_count);
+ if (actions->registered_array == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
+ bzero(actions->registered_array,
+ sizeof(ipc_port_t *) * actions->registered_count);
+ }
for (i = 0; i < pacts->pspa_count; i++) {
act = &pacts->pspa_actions[i];
if (MACH_PORT_VALID(act->new_port)) {
kr = ipc_object_copyin(get_task_ipcspace(current_task()),
- act->new_port, MACH_MSG_TYPE_COPY_SEND,
- (ipc_object_t *) &port);
+ act->new_port, MACH_MSG_TYPE_COPY_SEND,
+ (ipc_object_t *) &port, 0, NULL, IPC_KMSG_FLAGS_ALLOW_IMMOVABLE_SEND);
if (kr != KERN_SUCCESS) {
ret = EINVAL;
case PSPA_SPECIAL:
kr = task_set_special_port(task, act->which, port);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
ret = EINVAL;
+ }
break;
case PSPA_EXCEPTION:
kr = task_set_exception_ports(task, act->mask, port,
- act->behavior, act->flavor);
- if (kr != KERN_SUCCESS)
+ act->behavior, act->flavor);
+ if (kr != KERN_SUCCESS) {
ret = EINVAL;
+ }
break;
#if CONFIG_AUDIT
case PSPA_AU_SESSION:
break;
#endif
case PSPA_IMP_WATCHPORTS:
- if (portwatch_ports != NULL && IPC_PORT_VALID(port)) {
- *portwatch_present = TRUE;
+ if (actions->portwatch_array) {
/* hold on to this till end of spawn */
- portwatch_ports[i] = port;
+ actions->portwatch_array[portwatch_i++] = port;
} else {
ipc_port_release_send(port);
}
+ break;
+ case PSPA_REGISTERED_PORTS:
+ /* hold on to this till end of spawn */
+ actions->registered_array[registered_i++] = port;
+ break;
+ case PSPA_SUID_CRED:
+ imgp->ip_sc_port = port;
break;
+
default:
ret = EINVAL;
break;
}
done:
- if (0 != ret)
+ if (0 != ret) {
DTRACE_PROC1(spawn__port__failure, mach_port_name_t, act->new_port);
- return (ret);
+ }
+ return ret;
}
/*
int action;
proc_t p = vfs_context_proc(imgp->ip_vfs_context);
_posix_spawn_file_actions_t px_sfap = imgp->ip_px_sfa;
- int ival[2]; /* dummy retval for system calls) */
+ int ival[2]; /* dummy retval for system calls) */
+#if CONFIG_AUDIT
+ struct uthread *uthread = get_bsdthread_info(current_thread());
+#endif
for (action = 0; action < px_sfap->psfa_act_count; action++) {
- _psfa_action_t *psfa = &px_sfap->psfa_act_acts[ action];
+ _psfa_action_t *psfa = &px_sfap->psfa_act_acts[action];
- switch(psfa->psfaa_type) {
+ switch (psfa->psfaa_type) {
case PSFA_OPEN: {
/*
* Open is different, in that it requires the use of
VATTR_INIT(vap);
/* Mask off all but regular access permissions */
- mode = ((mode &~ p->p_fd->fd_cmask) & ALLPERMS) & ~S_ISTXT;
+ mode = ((mode & ~p->p_fd->fd_cmask) & ALLPERMS) & ~S_ISTXT;
VATTR_SET(vap, va_mode, mode & ACCESSPERMS);
+ AUDIT_SUBCALL_ENTER(OPEN, p, uthread);
+
NDINIT(ndp, LOOKUP, OP_OPEN, FOLLOW | AUDITVNPATH1, UIO_SYSSPACE,
- CAST_USER_ADDR_T(psfa->psfaa_openargs.psfao_path),
- imgp->ip_vfs_context);
+ CAST_USER_ADDR_T(psfa->psfaa_openargs.psfao_path),
+ imgp->ip_vfs_context);
- error = open1(imgp->ip_vfs_context,
- ndp,
- psfa->psfaa_openargs.psfao_oflag,
- vap,
- fileproc_alloc_init, NULL,
- ival);
+ error = open1(imgp->ip_vfs_context,
+ ndp,
+ psfa->psfaa_openargs.psfao_oflag,
+ vap,
+ fileproc_alloc_init, NULL,
+ ival);
FREE(bufp, M_TEMP);
+ AUDIT_SUBCALL_EXIT(uthread, error);
+
/*
* If there's an error, or we get the right fd by
* accident, then drop out here. This is easier than
* reworking all the open code to preallocate fd
* slots, and internally taking one as an argument.
*/
- if (error || ival[0] == psfa->psfaa_filedes)
+ if (error || ival[0] == psfa->psfaa_filedes) {
break;
+ }
origfd = ival[0];
/*
* can ignore that, since if we didn't get the
* fd we wanted, the error will stop us.
*/
+ AUDIT_SUBCALL_ENTER(DUP2, p, uthread);
error = dup2(p, &dup2a, ival);
- if (error)
+ AUDIT_SUBCALL_EXIT(uthread, error);
+ if (error) {
break;
+ }
/*
* Finally, close the original fd.
*/
ca.fd = origfd;
+ AUDIT_SUBCALL_ENTER(CLOSE, p, uthread);
error = close_nocancel(p, &ca, ival);
- }
- break;
+ AUDIT_SUBCALL_EXIT(uthread, error);
+ }
+ break;
case PSFA_DUP2: {
struct dup2_args dup2a;
dup2a.from = psfa->psfaa_filedes;
- dup2a.to = psfa->psfaa_openargs.psfao_oflag;
+ dup2a.to = psfa->psfaa_dup2args.psfad_newfiledes;
/*
* The dup2() system call implementation sets
* can ignore that, since if we didn't get the
* fd we wanted, the error will stop us.
*/
+ AUDIT_SUBCALL_ENTER(DUP2, p, uthread);
error = dup2(p, &dup2a, ival);
+ AUDIT_SUBCALL_EXIT(uthread, error);
+ }
+ break;
+
+ case PSFA_FILEPORT_DUP2: {
+ ipc_port_t port;
+ kern_return_t kr;
+ struct dup2_args dup2a;
+ struct close_nocancel_args ca;
+
+ if (!MACH_PORT_VALID(psfa->psfaa_fileport)) {
+ error = EINVAL;
+ break;
+ }
+
+ kr = ipc_object_copyin(get_task_ipcspace(current_task()),
+ psfa->psfaa_fileport, MACH_MSG_TYPE_COPY_SEND,
+ (ipc_object_t *) &port, 0, NULL, IPC_KMSG_FLAGS_ALLOW_IMMOVABLE_SEND);
+
+ if (kr != KERN_SUCCESS) {
+ error = EINVAL;
+ break;
+ }
+
+ error = fileport_makefd_internal(p, port, 0, ival);
+
+ if (IPC_PORT_NULL != port) {
+ ipc_port_release_send(port);
+ }
+
+ if (error || ival[0] == psfa->psfaa_dup2args.psfad_newfiledes) {
+ break;
}
- break;
+
+ dup2a.from = ca.fd = ival[0];
+ dup2a.to = psfa->psfaa_dup2args.psfad_newfiledes;
+ AUDIT_SUBCALL_ENTER(DUP2, p, uthread);
+ error = dup2(p, &dup2a, ival);
+ AUDIT_SUBCALL_EXIT(uthread, error);
+ if (error) {
+ break;
+ }
+
+ AUDIT_SUBCALL_ENTER(CLOSE, p, uthread);
+ error = close_nocancel(p, &ca, ival);
+ AUDIT_SUBCALL_EXIT(uthread, error);
+ }
+ break;
case PSFA_CLOSE: {
struct close_nocancel_args ca;
ca.fd = psfa->psfaa_filedes;
+ AUDIT_SUBCALL_ENTER(CLOSE, p, uthread);
error = close_nocancel(p, &ca, ival);
- }
- break;
+ AUDIT_SUBCALL_EXIT(uthread, error);
+ }
+ break;
case PSFA_INHERIT: {
struct fcntl_nocancel_args fcntla;
*/
fcntla.fd = psfa->psfaa_filedes;
fcntla.cmd = F_GETFD;
- if ((error = fcntl_nocancel(p, &fcntla, ival)) != 0)
+ if ((error = fcntl_nocancel(p, &fcntla, ival)) != 0) {
break;
+ }
if ((ival[0] & FD_CLOEXEC) == FD_CLOEXEC) {
fcntla.fd = psfa->psfaa_filedes;
fcntla.arg = ival[0] & ~FD_CLOEXEC;
error = fcntl_nocancel(p, &fcntla, ival);
}
+ }
+ break;
- }
- break;
+ case PSFA_CHDIR: {
+ /*
+ * Chdir is different, in that it requires the use of
+ * a path argument, which is normally copied in from
+ * user space; because of this, we have to support a
+ * chdir from kernel space that passes an address space
+ * context of UIO_SYSSPACE, and casts the address
+ * argument to a user_addr_t.
+ */
+ struct nameidata nd;
+
+ AUDIT_SUBCALL_ENTER(CHDIR, p, uthread);
+ NDINIT(&nd, LOOKUP, OP_CHDIR, FOLLOW | AUDITVNPATH1, UIO_SYSSPACE,
+ CAST_USER_ADDR_T(psfa->psfaa_chdirargs.psfac_path),
+ imgp->ip_vfs_context);
+
+ error = chdir_internal(p, imgp->ip_vfs_context, &nd, 0);
+ AUDIT_SUBCALL_EXIT(uthread, error);
+ }
+ break;
+
+ case PSFA_FCHDIR: {
+ struct fchdir_args fchdira;
+
+ fchdira.fd = psfa->psfaa_filedes;
+
+ AUDIT_SUBCALL_ENTER(FCHDIR, p, uthread);
+ error = fchdir(p, &fchdira, ival);
+ AUDIT_SUBCALL_EXIT(uthread, error);
+ }
+ break;
default:
error = EINVAL;
if (error) {
if (PSFA_OPEN == psfa->psfaa_type) {
DTRACE_PROC1(spawn__open__failure, uintptr_t,
- psfa->psfaa_openargs.psfao_path);
+ psfa->psfaa_openargs.psfao_path);
} else {
DTRACE_PROC1(spawn__fd__failure, int, psfa->psfaa_filedes);
}
}
}
- if (error != 0 || (psa_flags & POSIX_SPAWN_CLOEXEC_DEFAULT) == 0)
- return (error);
+ if (error != 0 || (psa_flags & POSIX_SPAWN_CLOEXEC_DEFAULT) == 0) {
+ return error;
+ }
/*
* If POSIX_SPAWN_CLOEXEC_DEFAULT is set, behave (during
switch (psfa->psfaa_type) {
case PSFA_DUP2:
- fd = psfa->psfaa_openargs.psfao_oflag;
- /*FALLTHROUGH*/
+ case PSFA_FILEPORT_DUP2:
+ fd = psfa->psfaa_dup2args.psfad_newfiledes;
+ /*FALLTHROUGH*/
case PSFA_OPEN:
case PSFA_INHERIT:
*fdflags(p, fd) |= UF_INHERIT;
break;
case PSFA_CLOSE:
+ case PSFA_CHDIR:
+ case PSFA_FCHDIR:
+ /*
+ * Although PSFA_FCHDIR does have a file descriptor, it is not
+ * *creating* one, thus we do not automatically mark it for
+ * inheritance under POSIX_SPAWN_CLOEXEC_DEFAULT. A client that
+ * wishes it to be inherited should use the PSFA_INHERIT action
+ * explicitly.
+ */
break;
}
}
proc_fdunlock(p);
- return (0);
+ return 0;
}
#if CONFIG_MACF
const struct _posix_spawn_mac_policy_extensions *psmx = macextensions;
int i;
- if (psmx == NULL)
+ if (psmx == NULL) {
return NULL;
+ }
for (i = 0; i < psmx->psmx_count; i++) {
const _ps_mac_policy_extension_t *extension = &psmx->psmx_extensions[i];
if (strncmp(extension->policyname, policyname, sizeof(extension->policyname)) == 0) {
- if (lenp != NULL)
+ if (lenp != NULL) {
*lenp = extension->datalen;
+ }
return extension->datap;
}
}
- if (lenp != NULL)
+ if (lenp != NULL) {
*lenp = 0;
+ }
return NULL;
}
}
MALLOC(psmx, _posix_spawn_mac_policy_extensions_t, px_args->mac_extensions_size, M_TEMP, M_WAITOK);
- if ((error = copyin(px_args->mac_extensions, psmx, px_args->mac_extensions_size)) != 0)
+ if ((error = copyin(px_args->mac_extensions, psmx, px_args->mac_extensions_size)) != 0) {
goto bad;
+ }
size_t extsize = PS_MAC_EXTENSIONS_SIZE(psmx->psmx_count);
if (extsize == 0 || extsize > px_args->mac_extensions_size) {
bad:
if (psmx != NULL) {
- for (i = 0; i < copycnt; i++)
+ for (i = 0; i < copycnt; i++) {
FREE(psmx->psmx_extensions[i].datap, M_TEMP);
+ }
FREE(psmx, M_TEMP);
}
return error;
{
int i;
- if (psmx == NULL)
+ if (psmx == NULL) {
return;
- for (i = 0; i < psmx->psmx_count; i++)
+ }
+ for (i = 0; i < psmx->psmx_count; i++) {
FREE(psmx->psmx_extensions[i].datap, M_TEMP);
+ }
FREE(psmx, M_TEMP);
}
#endif /* CONFIG_MACF */
#if CONFIG_COALITIONS
-static inline void spawn_coalitions_release_all(coalition_t coal[COALITION_NUM_TYPES])
+static inline void
+spawn_coalitions_release_all(coalition_t coal[COALITION_NUM_TYPES])
{
for (int c = 0; c < COALITION_NUM_TYPES; c++) {
if (coal[c]) {
#endif
#if CONFIG_PERSONAS
-static int spawn_validate_persona(struct _posix_spawn_persona_info *px_persona)
+static int
+spawn_validate_persona(struct _posix_spawn_persona_info *px_persona)
{
int error = 0;
struct persona *persona = NULL;
int verify = px_persona->pspi_flags & POSIX_SPAWN_PERSONA_FLAGS_VERIFY;
- /*
- * TODO: rdar://problem/19981151
- * Add entitlement check!
- */
- if (!kauth_cred_issuser(kauth_cred_get()))
+ if (!IOTaskHasEntitlement(current_task(), PERSONA_MGMT_ENTITLEMENT)) {
return EPERM;
+ }
+
+ if (px_persona->pspi_flags & POSIX_SPAWN_PERSONA_GROUPS) {
+ if (px_persona->pspi_ngroups > NGROUPS_MAX) {
+ return EINVAL;
+ }
+ }
persona = persona_lookup(px_persona->pspi_id);
if (!persona) {
}
}
if (px_persona->pspi_flags & POSIX_SPAWN_PERSONA_GROUPS) {
- int ngroups = 0;
+ unsigned ngroups = 0;
gid_t groups[NGROUPS_MAX];
if (persona_get_groups(persona, &ngroups, groups,
- px_persona->pspi_ngroups) != 0) {
+ px_persona->pspi_ngroups) != 0) {
error = EINVAL;
goto out;
}
- if (ngroups != (int)px_persona->pspi_ngroups) {
+ if (ngroups != px_persona->pspi_ngroups) {
error = EINVAL;
goto out;
}
}
out:
- if (persona)
+ if (persona) {
persona_put(persona);
+ }
return error;
}
-static int spawn_persona_adopt(proc_t p, struct _posix_spawn_persona_info *px_persona)
+static int
+spawn_persona_adopt(proc_t p, struct _posix_spawn_persona_info *px_persona)
{
int ret;
kauth_cred_t cred;
struct persona *persona = NULL;
int override = !!(px_persona->pspi_flags & POSIX_SPAWN_PERSONA_FLAGS_OVERRIDE);
- if (!override)
+ if (!override) {
return persona_proc_adopt_id(p, px_persona->pspi_id, NULL);
+ }
/*
* we want to spawn into the given persona, but we want to override
* the kauth with a different UID/GID combo
*/
persona = persona_lookup(px_persona->pspi_id);
- if (!persona)
+ if (!persona) {
return ESRCH;
+ }
cred = persona_get_cred(persona);
if (!cred) {
if (px_persona->pspi_flags & POSIX_SPAWN_PERSONA_UID) {
cred = kauth_cred_setresuid(cred,
- px_persona->pspi_uid,
- px_persona->pspi_uid,
- px_persona->pspi_uid,
- KAUTH_UID_NONE);
+ px_persona->pspi_uid,
+ px_persona->pspi_uid,
+ px_persona->pspi_uid,
+ KAUTH_UID_NONE);
}
if (px_persona->pspi_flags & POSIX_SPAWN_PERSONA_GID) {
cred = kauth_cred_setresgid(cred,
- px_persona->pspi_gid,
- px_persona->pspi_gid,
- px_persona->pspi_gid);
+ px_persona->pspi_gid,
+ px_persona->pspi_gid,
+ px_persona->pspi_gid);
}
if (px_persona->pspi_flags & POSIX_SPAWN_PERSONA_GROUPS) {
cred = kauth_cred_setgroups(cred,
- px_persona->pspi_groups,
- px_persona->pspi_ngroups,
- px_persona->pspi_gmuid);
+ px_persona->pspi_groups,
+ px_persona->pspi_ngroups,
+ px_persona->pspi_gmuid);
}
ret = persona_proc_adopt(p, persona, cred);
}
#endif
+#if __arm64__
+extern int legacy_footprint_entitlement_mode;
+static inline void
+proc_legacy_footprint_entitled(proc_t p, task_t task, const char *caller)
+{
+#pragma unused(p, caller)
+ boolean_t legacy_footprint_entitled;
+
+ switch (legacy_footprint_entitlement_mode) {
+ case LEGACY_FOOTPRINT_ENTITLEMENT_IGNORE:
+ /* the entitlement is ignored */
+ break;
+ case LEGACY_FOOTPRINT_ENTITLEMENT_IOS11_ACCT:
+ /* the entitlement grants iOS11 legacy accounting */
+ legacy_footprint_entitled = IOTaskHasEntitlement(task,
+ "com.apple.private.memory.legacy_footprint");
+ if (legacy_footprint_entitled) {
+ task_set_legacy_footprint(task);
+ }
+ break;
+ case LEGACY_FOOTPRINT_ENTITLEMENT_LIMIT_INCREASE:
+ /* the entitlement grants a footprint limit increase */
+ legacy_footprint_entitled = IOTaskHasEntitlement(task,
+ "com.apple.private.memory.legacy_footprint");
+ if (legacy_footprint_entitled) {
+ task_set_extra_footprint_limit(task);
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static inline void
+proc_ios13extended_footprint_entitled(proc_t p, task_t task, const char *caller)
+{
+#pragma unused(p, caller)
+ boolean_t ios13extended_footprint_entitled;
+
+ /* the entitlement grants a footprint limit increase */
+ ios13extended_footprint_entitled = IOTaskHasEntitlement(task,
+ "com.apple.developer.memory.ios13extended_footprint");
+ if (ios13extended_footprint_entitled) {
+ task_set_ios13extended_footprint_limit(task);
+ }
+}
+#endif /* __arm64__ */
+
+/*
+ * Apply a modification on the proc's kauth cred until it converges.
+ *
+ * `update` consumes its argument to return a new kauth cred.
+ */
+static void
+apply_kauth_cred_update(proc_t p,
+ kauth_cred_t (^update)(kauth_cred_t orig_cred))
+{
+ kauth_cred_t my_cred, my_new_cred;
+
+ my_cred = kauth_cred_proc_ref(p);
+ for (;;) {
+ my_new_cred = update(my_cred);
+ if (my_cred == my_new_cred) {
+ kauth_cred_unref(&my_new_cred);
+ break;
+ }
+
+ /* try update cred on proc */
+ proc_ucred_lock(p);
+
+ if (p->p_ucred == my_cred) {
+ /* base pointer didn't change, donate our ref */
+ p->p_ucred = my_new_cred;
+ PROC_UPDATE_CREDS_ONPROC(p);
+ proc_ucred_unlock(p);
+
+ /* drop p->p_ucred reference */
+ kauth_cred_unref(&my_cred);
+ break;
+ }
+
+ /* base pointer changed, retry */
+ my_cred = p->p_ucred;
+ kauth_cred_ref(my_cred);
+ proc_ucred_unlock(p);
+
+ kauth_cred_unref(&my_new_cred);
+ }
+}
+
+static int
+spawn_posix_cred_adopt(proc_t p,
+ struct _posix_spawn_posix_cred_info *px_pcred_info)
+{
+ int error = 0;
+
+ if (px_pcred_info->pspci_flags & POSIX_SPAWN_POSIX_CRED_GID) {
+ struct setgid_args args = {
+ .gid = px_pcred_info->pspci_gid,
+ };
+ error = setgid(p, &args, NULL);
+ if (error) {
+ return error;
+ }
+ }
+
+ if (px_pcred_info->pspci_flags & POSIX_SPAWN_POSIX_CRED_GROUPS) {
+ error = setgroups_internal(p,
+ px_pcred_info->pspci_ngroups,
+ px_pcred_info->pspci_groups,
+ px_pcred_info->pspci_gmuid);
+ if (error) {
+ return error;
+ }
+ }
+
+ if (px_pcred_info->pspci_flags & POSIX_SPAWN_POSIX_CRED_UID) {
+ struct setuid_args args = {
+ .uid = px_pcred_info->pspci_uid,
+ };
+ error = setuid(p, &args, NULL);
+ if (error) {
+ return error;
+ }
+ }
+ return 0;
+}
+
/*
* posix_spawn
*
* exec_activate_image:ENAMETOOLONG Filename too long
* exec_activate_image:ENOEXEC Executable file format error
* exec_activate_image:ETXTBSY Text file busy [misuse of error code]
+ * exec_activate_image:EAUTH Image decryption failed
* exec_activate_image:EBADEXEC The executable is corrupt/unknown
* exec_activate_image:???
* mac_execve_enter:???
int
posix_spawn(proc_t ap, struct posix_spawn_args *uap, int32_t *retval)
{
- proc_t p = ap; /* quiet bogus GCC vfork() warning */
+ proc_t p = ap; /* quiet bogus GCC vfork() warning */
user_addr_t pid = uap->pid;
- int ival[2]; /* dummy retval for setpgid() */
- char *bufp = NULL;
+ int ival[2]; /* dummy retval for setpgid() */
+ char *bufp = NULL;
struct image_params *imgp;
struct vnode_attr *vap;
struct vnode_attr *origvap;
- struct uthread *uthread = 0; /* compiler complains if not set to 0*/
+ struct uthread *uthread = 0; /* compiler complains if not set to 0*/
int error, sig;
int is_64 = IS_64BIT_PROCESS(p);
struct vfs_context context;
boolean_t spawn_no_exec = FALSE;
boolean_t proc_transit_set = TRUE;
boolean_t exec_done = FALSE;
- int portwatch_count = 0;
- ipc_port_t * portwatch_ports = NULL;
+ struct exec_port_actions port_actions = { };
vm_size_t px_sa_offset = offsetof(struct _posix_spawnattr, psa_ports);
+ task_t old_task = current_task();
task_t new_task = NULL;
boolean_t should_release_proc_ref = FALSE;
void *inherit = NULL;
#if CONFIG_PERSONAS
struct _posix_spawn_persona_info *px_persona = NULL;
#endif
+ struct _posix_spawn_posix_cred_info *px_pcred_info = NULL;
/*
- * Allocate a big chunk for locals instead of using stack since these
+ * Allocate a big chunk for locals instead of using stack since these
* structures are pretty big.
*/
MALLOC(bufp, char *, (sizeof(*imgp) + sizeof(*vap) + sizeof(*origvap)), M_TEMP, M_WAITOK | M_ZERO);
imgp->ip_vattr = vap;
imgp->ip_origvattr = origvap;
imgp->ip_vfs_context = &context;
- imgp->ip_flags = (is_64 ? IMGPF_WAS_64BIT : IMGPF_NONE);
+ imgp->ip_flags = (is_64 ? IMGPF_WAS_64BIT_ADDR : IMGPF_NONE);
imgp->ip_seg = (is_64 ? UIO_USERSPACE64 : UIO_USERSPACE32);
imgp->ip_mac_return = 0;
imgp->ip_px_persona = NULL;
+ imgp->ip_px_pcred_info = NULL;
imgp->ip_cs_error = OS_REASON_NULL;
+ imgp->ip_simulator_binary = IMGPF_SB_DEFAULT;
if (uap->adesc != USER_ADDR_NULL) {
- if(is_64) {
+ if (is_64) {
error = copyin(uap->adesc, &px_args, sizeof(px_args));
} else {
struct user32__posix_spawn_args_desc px_args32;
px_args.coal_info = CAST_USER_ADDR_T(px_args32.coal_info);
px_args.persona_info_size = px_args32.persona_info_size;
px_args.persona_info = CAST_USER_ADDR_T(px_args32.persona_info);
+ px_args.posix_cred_info_size = px_args32.posix_cred_info_size;
+ px_args.posix_cred_info = CAST_USER_ADDR_T(px_args32.posix_cred_info);
}
- if (error)
+ if (error) {
goto bad;
+ }
if (px_args.attr_size != 0) {
- /*
- * We are not copying the port_actions pointer,
- * because we already have it from px_args.
+ /*
+ * We are not copying the port_actions pointer,
+ * because we already have it from px_args.
* This is a bit fragile: <rdar://problem/16427422>
*/
- if ((error = copyin(px_args.attrp, &px_sa, px_sa_offset) != 0))
- goto bad;
-
- bzero( (void *)( (unsigned long) &px_sa + px_sa_offset), sizeof(px_sa) - px_sa_offset );
+ if ((error = copyin(px_args.attrp, &px_sa, px_sa_offset)) != 0) {
+ goto bad;
+ }
+
+ bzero((void *)((unsigned long) &px_sa + px_sa_offset), sizeof(px_sa) - px_sa_offset );
imgp->ip_px_sa = &px_sa;
}
}
imgp->ip_px_sfa = px_sfap;
- if ((error = copyin(px_args.file_actions, px_sfap,
- px_args.file_actions_size)) != 0)
+ if ((error = copyin(px_args.file_actions, px_sfap,
+ px_args.file_actions_size)) != 0) {
goto bad;
+ }
/* Verify that the action count matches the struct size */
size_t psfsize = PSF_ACTIONS_SIZE(px_sfap->psfa_act_count);
if (px_args.port_actions_size != 0) {
/* Limit port_actions to one page of data */
if (px_args.port_actions_size < PS_PORT_ACTIONS_SIZE(1) ||
- px_args.port_actions_size > PAGE_SIZE) {
+ px_args.port_actions_size > PAGE_SIZE) {
error = EINVAL;
goto bad;
}
- MALLOC(px_spap, _posix_spawn_port_actions_t,
- px_args.port_actions_size, M_TEMP, M_WAITOK);
+ MALLOC(px_spap, _posix_spawn_port_actions_t,
+ px_args.port_actions_size, M_TEMP, M_WAITOK);
if (px_spap == NULL) {
error = ENOMEM;
goto bad;
}
imgp->ip_px_spa = px_spap;
- if ((error = copyin(px_args.port_actions, px_spap,
- px_args.port_actions_size)) != 0)
+ if ((error = copyin(px_args.port_actions, px_spap,
+ px_args.port_actions_size)) != 0) {
goto bad;
+ }
/* Verify that the action count matches the struct size */
size_t pasize = PS_PORT_ACTIONS_SIZE(px_spap->pspa_count);
goto bad;
}
- MALLOC(px_persona, struct _posix_spawn_persona_info *, px_args.persona_info_size, M_TEMP, M_WAITOK|M_ZERO);
+ MALLOC(px_persona, struct _posix_spawn_persona_info *, px_args.persona_info_size, M_TEMP, M_WAITOK | M_ZERO);
if (px_persona == NULL) {
error = ENOMEM;
goto bad;
imgp->ip_px_persona = px_persona;
if ((error = copyin(px_args.persona_info, px_persona,
- px_args.persona_info_size)) != 0)
+ px_args.persona_info_size)) != 0) {
goto bad;
- if ((error = spawn_validate_persona(px_persona)) != 0)
+ }
+ if ((error = spawn_validate_persona(px_persona)) != 0) {
goto bad;
+ }
}
#endif
+ /* copy in the posix cred info */
+ if (px_args.posix_cred_info_size != 0 && px_args.posix_cred_info != 0) {
+ /* for now, we need the exact same struct in user space */
+ if (px_args.posix_cred_info_size != sizeof(*px_pcred_info)) {
+ error = ERANGE;
+ goto bad;
+ }
+
+ if (!kauth_cred_issuser(kauth_cred_get())) {
+ error = EPERM;
+ goto bad;
+ }
+
+ MALLOC(px_pcred_info, struct _posix_spawn_posix_cred_info *,
+ px_args.posix_cred_info_size, M_TEMP, M_WAITOK | M_ZERO);
+ if (px_pcred_info == NULL) {
+ error = ENOMEM;
+ goto bad;
+ }
+ imgp->ip_px_pcred_info = px_pcred_info;
+
+ if ((error = copyin(px_args.posix_cred_info, px_pcred_info,
+ px_args.posix_cred_info_size)) != 0) {
+ goto bad;
+ }
+
+ if (px_pcred_info->pspci_flags & POSIX_SPAWN_POSIX_CRED_GROUPS) {
+ if (px_pcred_info->pspci_ngroups > NGROUPS_MAX) {
+ error = EINVAL;
+ goto bad;
+ }
+ }
+ }
#if CONFIG_MACF
if (px_args.mac_extensions_size != 0) {
- if ((error = spawn_copyin_macpolicyinfo(&px_args, (_posix_spawn_mac_policy_extensions_t *)&imgp->ip_px_smpx)) != 0)
+ if ((error = spawn_copyin_macpolicyinfo(&px_args, (_posix_spawn_mac_policy_extensions_t *)&imgp->ip_px_smpx)) != 0) {
goto bad;
+ }
}
#endif /* CONFIG_MACF */
}
* which depends on it.
*/
if (uthread->uu_flag & UT_VFORK) {
- error = EINVAL;
- goto bad;
+ error = EINVAL;
+ goto bad;
+ }
+
+ if (imgp->ip_px_sa != NULL) {
+ struct _posix_spawnattr *psa = (struct _posix_spawnattr *) imgp->ip_px_sa;
+ if ((error = exec_validate_spawnattr_policy(psa->psa_apptype)) != 0) {
+ goto bad;
+ }
}
/*
* which is one of the most expensive things about using fork()
* and execve().
*/
- if (imgp->ip_px_sa == NULL || !(px_sa.psa_flags & POSIX_SPAWN_SETEXEC)){
-
+ if (imgp->ip_px_sa == NULL || !(px_sa.psa_flags & POSIX_SPAWN_SETEXEC)) {
/* Set the new task's coalition, if it is requested. */
coalition_t coal[COALITION_NUM_TYPES] = { COALITION_NULL };
#if CONFIG_COALITIONS
struct _posix_spawn_coalition_info coal_info;
int coal_role[COALITION_NUM_TYPES];
- if (imgp->ip_px_sa == NULL || !px_args.coal_info)
+ if (imgp->ip_px_sa == NULL || !px_args.coal_info) {
goto do_fork1;
+ }
memset(&coal_info, 0, sizeof(coal_info));
- if (px_args.coal_info_size > sizeof(coal_info))
+ if (px_args.coal_info_size > sizeof(coal_info)) {
px_args.coal_info_size = sizeof(coal_info);
+ }
error = copyin(px_args.coal_info,
- &coal_info, px_args.coal_info_size);
- if (error != 0)
+ &coal_info, px_args.coal_info_size);
+ if (error != 0) {
goto bad;
+ }
ncoals = 0;
for (i = 0; i < COALITION_NUM_TYPES; i++) {
*/
if (!task_is_in_privileged_coalition(p->task, i)) {
coal_dbg("ERROR: %d not in privilegd "
- "coalition of type %d",
- p->p_pid, i);
+ "coalition of type %d",
+ p->p_pid, i);
spawn_coalitions_release_all(coal);
error = EPERM;
goto bad;
coal[i] = coalition_find_and_activate_by_id(cid);
if (coal[i] == COALITION_NULL) {
coal_dbg("could not find coalition id:%llu "
- "(perhaps it has been terminated or reaped)", cid);
+ "(perhaps it has been terminated or reaped)", cid);
/*
* release any other coalition's we
* may have a reference to
}
if (coalition_type(coal[i]) != i) {
coal_dbg("coalition with id:%lld is not of type:%d"
- " (it's type:%d)", cid, i, coalition_type(coal[i]));
+ " (it's type:%d)", cid, i, coalition_type(coal[i]));
error = ESRCH;
goto bad;
}
/* set the roles of this task within each given coalition */
if (error == 0) {
kr = coalitions_set_roles(coal, new_task, coal_role);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
error = EINVAL;
+ }
if (kdebug_debugid_enabled(MACHDBG_CODE(DBG_MACH_COALITION,
- MACH_COALITION_ADOPT))) {
+ MACH_COALITION_ADOPT))) {
for (i = 0; i < COALITION_NUM_TYPES; i++) {
if (coal[i] != COALITION_NULL) {
/*
* will get truncated to 32 bits
*/
KDBG_RELEASE(MACHDBG_CODE(
- DBG_MACH_COALITION,
- MACH_COALITION_ADOPT),
- coalition_id(coal[i]),
- get_task_uniqueid(new_task));
+ DBG_MACH_COALITION,
+ MACH_COALITION_ADOPT),
+ coalition_id(coal[i]),
+ get_task_uniqueid(new_task));
}
}
}
if (error != 0) {
goto bad;
}
- imgp->ip_flags |= IMGPF_SPAWN; /* spawn w/o exec */
- spawn_no_exec = TRUE; /* used in later tests */
-
-#if CONFIG_PERSONAS
- /*
- * If the parent isn't in a persona (launchd), and
- * hasn't specified a new persona for the process,
- * then we'll put the process into the system persona
- *
- * TODO: this will have to be re-worked because as of
- * now, without any launchd adoption, the resulting
- * xpcproxy process will not have sufficient
- * privileges to setuid/gid.
- */
-#if 0
- if (!proc_has_persona(p) && imgp->ip_px_persona == NULL) {
- MALLOC(px_persona, struct _posix_spawn_persona_info *,
- sizeof(*px_persona), M_TEMP, M_WAITOK|M_ZERO);
- if (px_persona == NULL) {
- error = ENOMEM;
- goto bad;
- }
- px_persona->pspi_id = persona_get_id(g_system_persona);
- imgp->ip_px_persona = px_persona;
- }
-#endif /* 0 */
-#endif /* CONFIG_PERSONAS */
+ imgp->ip_flags |= IMGPF_SPAWN; /* spawn w/o exec */
+ spawn_no_exec = TRUE; /* used in later tests */
} else {
/*
* For execve case, create a new task and thread
* During exec any transition from new_task -> proc is fine, but don't allow
* transition from proc->task, since it will modify old_task.
*/
- imgp->ip_new_thread = fork_create_child(current_task(),
- NULL, p, FALSE, p->p_flag & P_LP64, TRUE);
+ imgp->ip_new_thread = fork_create_child(old_task,
+ NULL,
+ p,
+ FALSE,
+ p->p_flag & P_LP64,
+ task_get_64bit_data(old_task),
+ TRUE);
/* task and thread ref returned by fork_create_child */
if (imgp->ip_new_thread == NULL) {
error = ENOMEM;
if (spawn_no_exec) {
p = (proc_t)get_bsdthreadtask_info(imgp->ip_new_thread);
-
+
/*
* We had to wait until this point before firing the
* proc:::create probe, otherwise p would not point to the
assert(p != NULL);
context.vc_thread = imgp->ip_new_thread;
- context.vc_ucred = p->p_ucred; /* XXX must NOT be kauth_cred_get() */
+ context.vc_ucred = p->p_ucred; /* XXX must NOT be kauth_cred_get() */
/*
* Post fdcopy(), pre exec_handle_sugid() - this is where we want
* The POSIX_SPAWN_CLOEXEC_DEFAULT flag
* is handled in exec_handle_file_actions().
*/
- if ((error = exec_handle_file_actions(imgp,
- imgp->ip_px_sa != NULL ? px_sa.psa_flags : 0)) != 0)
+#if CONFIG_AUDIT
+ /*
+ * The file actions auditing can overwrite the upath of
+ * AUE_POSIX_SPAWN audit record. Save the audit record.
+ */
+ struct kaudit_record *save_uu_ar = uthread->uu_ar;
+ uthread->uu_ar = NULL;
+#endif
+ error = exec_handle_file_actions(imgp,
+ imgp->ip_px_sa != NULL ? px_sa.psa_flags : 0);
+#if CONFIG_AUDIT
+ /* Restore the AUE_POSIX_SPAWN audit record. */
+ uthread->uu_ar = save_uu_ar;
+#endif
+ if (error != 0) {
goto bad;
+ }
}
/* Has spawn port actions? */
if (imgp->ip_px_spa != NULL) {
- boolean_t is_adaptive = FALSE;
- boolean_t portwatch_present = FALSE;
-
- /* Will this process become adaptive? The apptype isn't ready yet, so we can't look there. */
- if (imgp->ip_px_sa != NULL && px_sa.psa_apptype == POSIX_SPAWN_PROC_TYPE_DAEMON_ADAPTIVE)
- is_adaptive = TRUE;
-
+#if CONFIG_AUDIT
/*
- * portwatch only:
- * Allocate a place to store the ports we want to bind to the new task
- * We can't bind them until after the apptype is set.
+ * Do the same for the port actions as we did for the file
+ * actions. Save the AUE_POSIX_SPAWN audit record.
*/
- if (px_spap->pspa_count != 0 && is_adaptive) {
- portwatch_count = px_spap->pspa_count;
- MALLOC(portwatch_ports, ipc_port_t *, (sizeof(ipc_port_t) * portwatch_count), M_TEMP, M_WAITOK | M_ZERO);
- } else {
- portwatch_ports = NULL;
- }
-
- if ((error = exec_handle_port_actions(imgp, &portwatch_present, portwatch_ports)) != 0)
+ struct kaudit_record *save_uu_ar = uthread->uu_ar;
+ uthread->uu_ar = NULL;
+#endif
+ error = exec_handle_port_actions(imgp, &port_actions);
+#if CONFIG_AUDIT
+ /* Restore the AUE_POSIX_SPAWN audit record. */
+ uthread->uu_ar = save_uu_ar;
+#endif
+ if (error != 0) {
goto bad;
-
- if (portwatch_present == FALSE && portwatch_ports != NULL) {
- FREE(portwatch_ports, M_TEMP);
- portwatch_ports = NULL;
- portwatch_count = 0;
}
}
/* Has spawn attr? */
if (imgp->ip_px_sa != NULL) {
- /*
- * Set the process group ID of the child process; this has
- * to happen before the image activation.
- */
- if (px_sa.psa_flags & POSIX_SPAWN_SETPGROUP) {
- struct setpgid_args spga;
- spga.pid = p->p_pid;
- spga.pgid = px_sa.psa_pgroup;
- /*
- * Effectively, call setpgid() system call; works
- * because there are no pointer arguments.
- */
- if((error = setpgid(p, &spga, ival)) != 0)
- goto bad;
- }
-
/*
* Reset UID/GID to parent's RUID/RGID; This works only
* because the operation occurs *after* the vfork() and
* proc's ucred lock. This prevents others from accessing
* a garbage credential.
*/
- while (px_sa.psa_flags & POSIX_SPAWN_RESETIDS) {
- kauth_cred_t my_cred = kauth_cred_proc_ref(p);
- kauth_cred_t my_new_cred = kauth_cred_setuidgid(my_cred, kauth_cred_getruid(my_cred), kauth_cred_getrgid(my_cred));
+ if (px_sa.psa_flags & POSIX_SPAWN_RESETIDS) {
+ apply_kauth_cred_update(p, ^kauth_cred_t (kauth_cred_t my_cred){
+ return kauth_cred_setuidgid(my_cred,
+ kauth_cred_getruid(my_cred),
+ kauth_cred_getrgid(my_cred));
+ });
+ }
- if (my_cred == my_new_cred) {
- kauth_cred_unref(&my_cred);
- break;
+ if (imgp->ip_px_pcred_info) {
+ if (!spawn_no_exec) {
+ error = ENOTSUP;
+ goto bad;
}
- /* update cred on proc */
- proc_ucred_lock(p);
-
- if (p->p_ucred != my_cred) {
- proc_ucred_unlock(p);
- kauth_cred_unref(&my_new_cred);
- continue;
+ error = spawn_posix_cred_adopt(p, imgp->ip_px_pcred_info);
+ if (error != 0) {
+ goto bad;
}
-
- /* donate cred reference on my_new_cred to p->p_ucred */
- p->p_ucred = my_new_cred;
- PROC_UPDATE_CREDS_ONPROC(p);
- proc_ucred_unlock(p);
-
- /* drop additional reference that was taken on the previous cred */
- kauth_cred_unref(&my_cred);
}
#if CONFIG_PERSONAS
- if (spawn_no_exec && imgp->ip_px_persona != NULL) {
+ if (imgp->ip_px_persona != NULL) {
+ if (!spawn_no_exec) {
+ error = ENOTSUP;
+ goto bad;
+ }
+
/*
* If we were asked to spawn a process into a new persona,
* do the credential switch now (which may override the UID/GID
* being executed.
*/
error = spawn_persona_adopt(p, imgp->ip_px_persona);
- if (error != 0)
+ if (error != 0) {
goto bad;
+ }
}
#endif /* CONFIG_PERSONAS */
#if !SECURE_KERNEL
* useful or necessary to disable ASLR on a per-process
* basis for unit testing and debugging.
*/
- if (px_sa.psa_flags & _POSIX_SPAWN_DISABLE_ASLR)
+ if (px_sa.psa_flags & _POSIX_SPAWN_DISABLE_ASLR) {
OSBitOrAtomic(P_DISABLE_ASLR, &p->p_flag);
+ }
#endif /* !SECURE_KERNEL */
/* Randomize high bits of ASLR slide */
- if (px_sa.psa_flags & _POSIX_SPAWN_HIGH_BITS_ASLR)
+ if (px_sa.psa_flags & _POSIX_SPAWN_HIGH_BITS_ASLR) {
imgp->ip_flags |= IMGPF_HIGH_BITS_ASLR;
+ }
+#if !SECURE_KERNEL
/*
* Forcibly disallow execution from data pages for the spawned process
* even if it would otherwise be permitted by the architecture default.
*/
- if (px_sa.psa_flags & _POSIX_SPAWN_ALLOW_DATA_EXEC)
+ if (px_sa.psa_flags & _POSIX_SPAWN_ALLOW_DATA_EXEC) {
imgp->ip_flags |= IMGPF_ALLOW_DATA_EXEC;
+ }
+#endif /* !SECURE_KERNEL */
+
+ if ((px_sa.psa_apptype & POSIX_SPAWN_PROC_TYPE_MASK) ==
+ POSIX_SPAWN_PROC_TYPE_DRIVER) {
+ imgp->ip_flags |= IMGPF_DRIVER;
+ }
}
/*
* _POSIX_SPAWN_DISABLE_ASLR attribute was found above or if
* P_DISABLE_ASLR was inherited from the parent process.
*/
- if (p->p_flag & P_DISABLE_ASLR)
+ if (p->p_flag & P_DISABLE_ASLR) {
imgp->ip_flags |= IMGPF_DISABLE_ASLR;
+ }
- /*
+ /*
* Clear transition flag so we won't hang if exec_activate_image() causes
* an automount (and launchd does a proc sysctl to service it).
*
proc_transit_set = 0;
}
-#if MAC_SPAWN /* XXX */
+#if MAC_SPAWN /* XXX */
if (uap->mac_p != USER_ADDR_NULL) {
error = mac_execve_enter(uap->mac_p, imgp);
- if (error)
+ if (error) {
goto bad;
+ }
}
#endif
* Activate the image
*/
error = exec_activate_image(imgp);
-
+#if defined(HAS_APPLE_PAC)
+ ml_task_set_disable_user_jop(new_task, imgp->ip_flags & IMGPF_NOJOP ? TRUE : FALSE);
+ ml_thread_set_disable_user_jop(imgp->ip_new_thread, imgp->ip_flags & IMGPF_NOJOP ? TRUE : FALSE);
+#endif
+
if (error == 0 && !spawn_no_exec) {
- p = proc_exec_switch_task(p, current_task(), new_task, imgp->ip_new_thread);
+ p = proc_exec_switch_task(p, old_task, new_task, imgp->ip_new_thread);
/* proc ref returned */
should_release_proc_ref = TRUE;
+
+ /*
+ * Need to transfer pending watch port boosts to the new task while still making
+ * sure that the old task remains in the importance linkage. Create an importance
+ * linkage from old task to new task, then switch the task importance base
+ * of old task and new task. After the switch the port watch boost will be
+ * boosting the new task and new task will be donating importance to old task.
+ */
+ inherit = ipc_importance_exec_switch_task(old_task, new_task);
}
if (error == 0) {
error = ENOEXEC;
}
- /*
- * If we have a spawn attr, and it contains signal related flags,
- * the we need to process them in the "context" of the new child
- * process, so we have to process it following image activation,
- * prior to making the thread runnable in user space. This is
- * necessitated by some signal information being per-thread rather
- * than per-process, and we don't have the new allocation in hand
- * until after the image is activated.
- */
if (!error && imgp->ip_px_sa != NULL) {
thread_t child_thread = imgp->ip_new_thread;
uthread_t child_uthread = get_bsdthread_info(child_thread);
+ /*
+ * Because of POSIX_SPAWN_SETEXEC, we need to handle this after image
+ * activation, else when image activation fails (before the point of no
+ * return) would leave the parent process in a modified state.
+ */
+ if (px_sa.psa_flags & POSIX_SPAWN_SETPGROUP) {
+ struct setpgid_args spga;
+ spga.pid = p->p_pid;
+ spga.pgid = px_sa.psa_pgroup;
+ /*
+ * Effectively, call setpgid() system call; works
+ * because there are no pointer arguments.
+ */
+ if ((error = setpgid(p, &spga, ival)) != 0) {
+ goto bad;
+ }
+ }
+
+ if (px_sa.psa_flags & POSIX_SPAWN_SETSID) {
+ error = setsid_internal(p);
+ if (error != 0) {
+ goto bad;
+ }
+ }
+
+ /*
+ * If we have a spawn attr, and it contains signal related flags,
+ * the we need to process them in the "context" of the new child
+ * process, so we have to process it following image activation,
+ * prior to making the thread runnable in user space. This is
+ * necessitated by some signal information being per-thread rather
+ * than per-process, and we don't have the new allocation in hand
+ * until after the image is activated.
+ */
+
/*
* Mask a list of signals, instead of them being unmasked, if
* they were unmasked in the parent; note that some signals
* are not maskable.
*/
- if (px_sa.psa_flags & POSIX_SPAWN_SETSIGMASK)
+ if (px_sa.psa_flags & POSIX_SPAWN_SETSIGMASK) {
child_uthread->uu_sigmask = (px_sa.psa_sigmask & ~sigcantmask);
+ }
/*
* Default a list of signals instead of ignoring them, if
* they were ignored in the parent. Note that we pass
vec.sa_tramp = 0;
vec.sa_mask = 0;
vec.sa_flags = 0;
- for (sig = 1; sig < NSIG; sig++)
- if (px_sa.psa_sigdefault & (1 << (sig-1))) {
+ for (sig = 1; sig < NSIG; sig++) {
+ if (px_sa.psa_sigdefault & (1 << (sig - 1))) {
error = setsigvec(p, child_thread, sig, &vec, spawn_no_exec);
+ }
}
}
* whomever is turning it on could just as easily choose not to do so.
*/
error = proc_set_task_ruse_cpu(p->task,
- TASK_POLICY_RESOURCE_ATTRIBUTE_NOTIFY_EXC,
- px_sa.psa_cpumonitor_percent,
- px_sa.psa_cpumonitor_interval * NSEC_PER_SEC,
- 0, TRUE);
+ TASK_POLICY_RESOURCE_ATTRIBUTE_NOTIFY_EXC,
+ px_sa.psa_cpumonitor_percent,
+ px_sa.psa_cpumonitor_interval * NSEC_PER_SEC,
+ 0, TRUE);
+ }
+
+
+ if (px_pcred_info &&
+ (px_pcred_info->pspci_flags & POSIX_SPAWN_POSIX_CRED_LOGIN)) {
+ /*
+ * setlogin() must happen after setsid()
+ */
+ setlogin_internal(p, px_pcred_info->pspci_login);
}
}
if (error == 0) {
/* reset delay idle sleep status if set */
#if !CONFIG_EMBEDDED
- if ((p->p_flag & P_DELAYIDLESLEEP) == P_DELAYIDLESLEEP)
+ if ((p->p_flag & P_DELAYIDLESLEEP) == P_DELAYIDLESLEEP) {
OSBitAndAtomic(~((uint32_t)P_DELAYIDLESLEEP), &p->p_flag);
+ }
#endif /* !CONFIG_EMBEDDED */
/* upon successful spawn, re/set the proc control state */
if (imgp->ip_px_sa != NULL) {
switch (px_sa.psa_pcontrol) {
- case POSIX_SPAWN_PCONTROL_THROTTLE:
- p->p_pcaction = P_PCTHROTTLE;
- break;
- case POSIX_SPAWN_PCONTROL_SUSPEND:
- p->p_pcaction = P_PCSUSP;
- break;
- case POSIX_SPAWN_PCONTROL_KILL:
- p->p_pcaction = P_PCKILL;
- break;
- case POSIX_SPAWN_PCONTROL_NONE:
- default:
- p->p_pcaction = 0;
- break;
- };
+ case POSIX_SPAWN_PCONTROL_THROTTLE:
+ p->p_pcaction = P_PCTHROTTLE;
+ break;
+ case POSIX_SPAWN_PCONTROL_SUSPEND:
+ p->p_pcaction = P_PCSUSP;
+ break;
+ case POSIX_SPAWN_PCONTROL_KILL:
+ p->p_pcaction = P_PCKILL;
+ break;
+ case POSIX_SPAWN_PCONTROL_NONE:
+ default:
+ p->p_pcaction = 0;
+ break;
+ }
+ ;
}
exec_resettextvp(p, imgp);
-
+
#if CONFIG_MEMORYSTATUS
+ /* Set jetsam priority for DriverKit processes */
+ if (px_sa.psa_apptype == POSIX_SPAWN_PROC_TYPE_DRIVER) {
+ px_sa.psa_priority = JETSAM_PRIORITY_DRIVER_APPLE;
+ }
+
/* Has jetsam attributes? */
if (imgp->ip_px_sa != NULL && (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_SET)) {
/*
* we attempt to mimic previous behavior by forcing the BG limit data into the
* inactive/non-fatal mode and force the active slots to hold system_wide/fatal mode.
*/
+
if (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_HIWATER_BACKGROUND) {
- memorystatus_update(p, px_sa.psa_priority, 0,
- (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_USE_EFFECTIVE_PRIORITY),
- TRUE,
- -1, TRUE,
- px_sa.psa_memlimit_inactive, FALSE);
+ memorystatus_update(p, px_sa.psa_priority, 0, FALSE, /* assertion priority */
+ (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_USE_EFFECTIVE_PRIORITY),
+ TRUE,
+ -1, TRUE,
+ px_sa.psa_memlimit_inactive, FALSE);
} else {
- memorystatus_update(p, px_sa.psa_priority, 0,
- (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_USE_EFFECTIVE_PRIORITY),
- TRUE,
- px_sa.psa_memlimit_active,
- (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_MEMLIMIT_ACTIVE_FATAL),
- px_sa.psa_memlimit_inactive,
- (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_MEMLIMIT_INACTIVE_FATAL));
+ memorystatus_update(p, px_sa.psa_priority, 0, FALSE, /* assertion priority */
+ (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_USE_EFFECTIVE_PRIORITY),
+ TRUE,
+ px_sa.psa_memlimit_active,
+ (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_MEMLIMIT_ACTIVE_FATAL),
+ px_sa.psa_memlimit_inactive,
+ (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_MEMLIMIT_INACTIVE_FATAL));
}
+ }
+ /* Has jetsam relaunch behavior? */
+ if (imgp->ip_px_sa != NULL && (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_RELAUNCH_BEHAVIOR_MASK)) {
+ /*
+ * Launchd has passed in data indicating the behavior of this process in response to jetsam.
+ * This data would be used by the jetsam subsystem to determine the position and protection
+ * offered to this process on dirty -> clean transitions.
+ */
+ int relaunch_flags = P_MEMSTAT_RELAUNCH_UNKNOWN;
+ switch (px_sa.psa_jetsam_flags & POSIX_SPAWN_JETSAM_RELAUNCH_BEHAVIOR_MASK) {
+ case POSIX_SPAWN_JETSAM_RELAUNCH_BEHAVIOR_LOW:
+ relaunch_flags = P_MEMSTAT_RELAUNCH_LOW;
+ break;
+ case POSIX_SPAWN_JETSAM_RELAUNCH_BEHAVIOR_MED:
+ relaunch_flags = P_MEMSTAT_RELAUNCH_MED;
+ break;
+ case POSIX_SPAWN_JETSAM_RELAUNCH_BEHAVIOR_HIGH:
+ relaunch_flags = P_MEMSTAT_RELAUNCH_HIGH;
+ break;
+ default:
+ break;
+ }
+ memorystatus_relaunch_flags_update(p, relaunch_flags);
}
+
#endif /* CONFIG_MEMORYSTATUS */
+ if (imgp->ip_px_sa != NULL && px_sa.psa_thread_limit > 0) {
+ task_set_thread_limit(new_task, (uint16_t)px_sa.psa_thread_limit);
+ }
}
/*
* before check_for_signature(), which uses psignal.
*/
if (spawn_no_exec) {
- if (proc_transit_set)
+ if (proc_transit_set) {
proc_transend(p, 0);
+ }
/*
* Drop the signal lock on the child which was taken on our
}
/* flag exec has occurred, notify only if it has not failed due to FP Key error */
- if (!error && ((p->p_lflag & P_LTERM_DECRYPTFAIL) == 0))
+ if (!error && ((p->p_lflag & P_LTERM_DECRYPTFAIL) == 0)) {
proc_knote(p, NOTE_EXEC);
+ }
if (error == 0) {
error = proc_transstart(p, 0, 0);
if (error == 0) {
- task_bank_init(get_threadtask(imgp->ip_new_thread));
+ task_bank_init(new_task);
proc_transend(p, 0);
}
+
+#if __arm64__
+ proc_legacy_footprint_entitled(p, new_task, __FUNCTION__);
+ proc_ios13extended_footprint_entitled(p, new_task, __FUNCTION__);
+#endif /* __arm64__ */
}
/* Inherit task role from old task to new task for exec */
if (error == 0 && !spawn_no_exec) {
- proc_inherit_task_role(get_threadtask(imgp->ip_new_thread), current_task());
+ proc_inherit_task_role(new_task, old_task);
+ }
+
+#if CONFIG_ARCADE
+ if (error == 0) {
+ /*
+ * Check to see if we need to trigger an arcade upcall AST now
+ * that the vnode has been reset on the task.
+ */
+ arcade_prepare(new_task, imgp->ip_new_thread);
+ }
+#endif /* CONFIG_ARCADE */
+
+ /* Clear the initial wait on the thread before handling spawn policy */
+ if (imgp && imgp->ip_new_thread) {
+ task_clear_return_wait(get_threadtask(imgp->ip_new_thread), TCRW_CLEAR_INITIAL_WAIT);
}
/*
if (error == 0 && imgp->ip_px_sa != NULL) {
struct _posix_spawnattr *psa = (struct _posix_spawnattr *) imgp->ip_px_sa;
- exec_handle_spawnattr_policy(p, psa->psa_apptype, psa->psa_qos_clamp, psa->psa_darwin_role,
- portwatch_ports, portwatch_count);
+ error = exec_handle_spawnattr_policy(p, imgp->ip_new_thread, psa->psa_apptype, psa->psa_qos_clamp,
+ psa->psa_darwin_role, &port_actions);
+ }
+
+ /* Transfer the turnstile watchport boost to new task if in exec */
+ if (error == 0 && !spawn_no_exec) {
+ task_transfer_turnstile_watchports(old_task, new_task, imgp->ip_new_thread);
}
/*
- * Need to transfer pending watch port boosts to the new task while still making
- * sure that the old task remains in the importance linkage. Create an importance
- * linkage from old task to new task, then switch the task importance base
- * of old task and new task. After the switch the port watch boost will be
- * boosting the new task and new task will be donating importance to old task.
+ * Apply the requested maximum address.
*/
- if (error == 0 && task_did_exec(current_task())) {
- inherit = ipc_importance_exec_switch_task(current_task(), get_threadtask(imgp->ip_new_thread));
+ if (error == 0 && imgp->ip_px_sa != NULL) {
+ struct _posix_spawnattr *psa = (struct _posix_spawnattr *) imgp->ip_px_sa;
+
+ if (psa->psa_max_addr) {
+ vm_map_set_max_addr(get_task_map(new_task), psa->psa_max_addr);
+ }
}
if (error == 0) {
- /* Apply the main thread qos */
+ /* Apply the main thread qos */
thread_t main_thread = imgp->ip_new_thread;
- task_set_main_thread_qos(get_threadtask(imgp->ip_new_thread), main_thread);
+ task_set_main_thread_qos(new_task, main_thread);
#if CONFIG_MACF
/*
* a jumbo-size map.
*/
if (mac_proc_check_map_anon(p, 0, 0, 0, MAP_JIT, NULL) == 0) {
- vm_map_set_jumbo(get_task_map(p->task));
+ vm_map_set_jumbo(get_task_map(new_task));
+ vm_map_set_jit_entitled(get_task_map(new_task));
}
#endif /* CONFIG_MACF */
}
* Release any ports we kept around for binding to the new task
* We need to release the rights even if the posix_spawn has failed.
*/
- if (portwatch_ports != NULL) {
- for (int i = 0; i < portwatch_count; i++) {
- ipc_port_t port = NULL;
- if ((port = portwatch_ports[i]) != NULL) {
- ipc_port_release_send(port);
- }
- }
- FREE(portwatch_ports, M_TEMP);
- portwatch_ports = NULL;
- portwatch_count = 0;
+ if (imgp->ip_px_spa != NULL) {
+ exec_port_actions_destroy(&port_actions);
}
/*
psignal_vfork(p, p->task, imgp->ip_new_thread, SIGTRAP);
}
- if (error == 0 && !spawn_no_exec)
- KDBG(BSDDBG_CODE(DBG_BSD_PROC,BSD_PROC_EXEC),
- p->p_pid);
+ if (error == 0 && !spawn_no_exec) {
+ KDBG(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXEC),
+ p->p_pid);
+ }
}
if (imgp != NULL) {
- if (imgp->ip_vp)
+ if (imgp->ip_vp) {
vnode_put(imgp->ip_vp);
- if (imgp->ip_scriptvp)
+ }
+ if (imgp->ip_scriptvp) {
vnode_put(imgp->ip_scriptvp);
- if (imgp->ip_strings)
+ }
+ if (imgp->ip_strings) {
execargs_free(imgp);
- if (imgp->ip_px_sfa != NULL)
+ }
+ if (imgp->ip_px_sfa != NULL) {
FREE(imgp->ip_px_sfa, M_TEMP);
- if (imgp->ip_px_spa != NULL)
+ }
+ if (imgp->ip_px_spa != NULL) {
FREE(imgp->ip_px_spa, M_TEMP);
+ }
#if CONFIG_PERSONAS
- if (imgp->ip_px_persona != NULL)
+ if (imgp->ip_px_persona != NULL) {
FREE(imgp->ip_px_persona, M_TEMP);
+ }
#endif
+ if (imgp->ip_px_pcred_info != NULL) {
+ FREE(imgp->ip_px_pcred_info, M_TEMP);
+ }
#if CONFIG_MACF
- if (imgp->ip_px_smpx != NULL)
+ if (imgp->ip_px_smpx != NULL) {
spawn_free_macpolicyinfo(imgp->ip_px_smpx);
- if (imgp->ip_execlabelp)
+ }
+ if (imgp->ip_execlabelp) {
mac_cred_label_free(imgp->ip_execlabelp);
- if (imgp->ip_scriptlabelp)
+ }
+ if (imgp->ip_scriptlabelp) {
mac_vnode_label_free(imgp->ip_scriptlabelp);
+ }
if (imgp->ip_cs_error != OS_REASON_NULL) {
os_reason_free(imgp->ip_cs_error);
imgp->ip_cs_error = OS_REASON_NULL;
}
#endif
+ if (imgp->ip_sc_port != NULL) {
+ ipc_port_release_send(imgp->ip_sc_port);
+ imgp->ip_sc_port = NULL;
+ }
}
#if CONFIG_DTRACE
(*dtrace_proc_waitfor_hook)(p);
}
#endif
+
+#if CONFIG_AUDIT
+ if (!error && AUDIT_ENABLED() && p) {
+ /* Add the CDHash of the new process to the audit record */
+ uint8_t *cdhash = cs_get_cdhash(p);
+ if (cdhash) {
+ AUDIT_ARG(data, cdhash, sizeof(uint8_t), CS_CDHASH_LEN);
+ }
+ }
+#endif
+
/*
* clear bsd_info from old task if it did exec.
*/
- if (task_did_exec(current_task())) {
- set_bsdtask_info(current_task(), NULL);
+ if (task_did_exec(old_task)) {
+ set_bsdtask_info(old_task, NULL);
}
/* clear bsd_info from new task and terminate it if exec failed */
/*
* If the parent wants the pid, copy it out
*/
- if (pid != USER_ADDR_NULL)
- (void)suword(pid, p->p_pid);
+ if (pid != USER_ADDR_NULL) {
+ _Static_assert(sizeof(p->p_pid) == 4, "posix_spawn() assumes a 32-bit pid_t");
+ bool aligned = (pid & 3) == 0;
+ if (aligned) {
+ (void)copyout_atomic32(p->p_pid, pid);
+ } else {
+ (void)suword(pid, p->p_pid);
+ }
+ }
retval[0] = error;
/*
* switch the tasks, terminating the current task without the switch would
* result in loosing the SIGKILL status.
*/
- if (task_did_exec(current_task())) {
+ if (task_did_exec(old_task)) {
/* Terminate the current task, since exec will start in new task */
- task_terminate_internal(current_task());
+ task_terminate_internal(old_task);
}
/* Release the thread ref returned by fork_create_child/fork1 */
if (imgp != NULL && imgp->ip_new_thread) {
/* wake up the new thread */
- task_clear_return_wait(get_threadtask(imgp->ip_new_thread));
+ task_clear_return_wait(get_threadtask(imgp->ip_new_thread), TCRW_CLEAR_FINAL_WAIT);
thread_deallocate(imgp->ip_new_thread);
imgp->ip_new_thread = NULL;
}
if (inherit != NULL) {
ipc_importance_release(inherit);
}
-
- return(error);
+
+ return error;
}
/*
/* Clear dispatchqueue and workloop ast offset */
p->p_dispatchqueue_offset = 0;
p->p_dispatchqueue_serialno_offset = 0;
+ p->p_dispatchqueue_label_offset = 0;
p->p_return_to_kernel_offset = 0;
/* Copy the signal state, dtrace state and set bsd ast on new thread */
muap.mac_p = USER_ADDR_NULL;
err = __mac_execve(p, &muap, retval);
- return(err);
+ return err;
}
/*
int
__mac_execve(proc_t p, struct __mac_execve_args *uap, int32_t *retval)
{
- char *bufp = NULL;
+ char *bufp = NULL;
struct image_params *imgp;
struct vnode_attr *vap;
struct vnode_attr *origvap;
int error;
int is_64 = IS_64BIT_PROCESS(p);
struct vfs_context context;
- struct uthread *uthread;
+ struct uthread *uthread;
+ task_t old_task = current_task();
task_t new_task = NULL;
boolean_t should_release_proc_ref = FALSE;
boolean_t exec_done = FALSE;
void *inherit = NULL;
context.vc_thread = current_thread();
- context.vc_ucred = kauth_cred_proc_ref(p); /* XXX must NOT be kauth_cred_get() */
+ context.vc_ucred = kauth_cred_proc_ref(p); /* XXX must NOT be kauth_cred_get() */
- /* Allocate a big chunk for locals instead of using stack since these
+ /* Allocate a big chunk for locals instead of using stack since these
* structures a pretty big.
*/
MALLOC(bufp, char *, (sizeof(*imgp) + sizeof(*vap) + sizeof(*origvap)), M_TEMP, M_WAITOK | M_ZERO);
}
vap = (struct vnode_attr *) (bufp + sizeof(*imgp));
origvap = (struct vnode_attr *) (bufp + sizeof(*imgp) + sizeof(*vap));
-
+
/* Initialize the common data in the image_params structure */
imgp->ip_user_fname = uap->fname;
imgp->ip_user_argv = uap->argp;
imgp->ip_vattr = vap;
imgp->ip_origvattr = origvap;
imgp->ip_vfs_context = &context;
- imgp->ip_flags = (is_64 ? IMGPF_WAS_64BIT : IMGPF_NONE) | ((p->p_flag & P_DISABLE_ASLR) ? IMGPF_DISABLE_ASLR : IMGPF_NONE);
+ imgp->ip_flags = (is_64 ? IMGPF_WAS_64BIT_ADDR : IMGPF_NONE) | ((p->p_flag & P_DISABLE_ASLR) ? IMGPF_DISABLE_ASLR : IMGPF_NONE);
imgp->ip_seg = (is_64 ? UIO_USERSPACE64 : UIO_USERSPACE32);
imgp->ip_mac_return = 0;
imgp->ip_cs_error = OS_REASON_NULL;
+ imgp->ip_simulator_binary = IMGPF_SB_DEFAULT;
#if CONFIG_MACF
if (uap->mac_p != USER_ADDR_NULL) {
* During exec any transition from new_task -> proc is fine, but don't allow
* transition from proc->task, since it will modify old_task.
*/
- imgp->ip_new_thread = fork_create_child(current_task(),
- NULL, p, FALSE, p->p_flag & P_LP64, TRUE);
+ imgp->ip_new_thread = fork_create_child(old_task,
+ NULL,
+ p,
+ FALSE,
+ p->p_flag & P_LP64,
+ task_get_64bit_data(old_task),
+ TRUE);
/* task and thread ref returned by fork_create_child */
if (imgp->ip_new_thread == NULL) {
error = ENOMEM;
* for vfexec.
*/
new_task = get_threadtask(imgp->ip_new_thread);
+#if defined(HAS_APPLE_PAC)
+ ml_task_set_disable_user_jop(new_task, imgp->ip_flags & IMGPF_NOJOP ? TRUE : FALSE);
+ ml_thread_set_disable_user_jop(imgp->ip_new_thread, imgp->ip_flags & IMGPF_NOJOP ? TRUE : FALSE);
+#endif
}
if (!error && !in_vfexec) {
- p = proc_exec_switch_task(p, current_task(), new_task, imgp->ip_new_thread);
+ p = proc_exec_switch_task(p, old_task, new_task, imgp->ip_new_thread);
/* proc ref returned */
should_release_proc_ref = TRUE;
+
+ /*
+ * Need to transfer pending watch port boosts to the new task while still making
+ * sure that the old task remains in the importance linkage. Create an importance
+ * linkage from old task to new task, then switch the task importance base
+ * of old task and new task. After the switch the port watch boost will be
+ * boosting the new task and new task will be donating importance to old task.
+ */
+ inherit = ipc_importance_exec_switch_task(old_task, new_task);
}
kauth_cred_unref(&context.vc_ucred);
-
+
/* Image not claimed by any activator? */
- if (error == -1)
+ if (error == -1) {
error = ENOEXEC;
+ }
if (!error) {
exec_done = TRUE;
}
/* flag exec has occurred, notify only if it has not failed due to FP Key error */
- if (exec_done && ((p->p_lflag & P_LTERM_DECRYPTFAIL) == 0))
+ if (exec_done && ((p->p_lflag & P_LTERM_DECRYPTFAIL) == 0)) {
proc_knote(p, NOTE_EXEC);
+ }
- if (imgp->ip_vp != NULLVP)
+ if (imgp->ip_vp != NULLVP) {
vnode_put(imgp->ip_vp);
- if (imgp->ip_scriptvp != NULLVP)
+ }
+ if (imgp->ip_scriptvp != NULLVP) {
vnode_put(imgp->ip_scriptvp);
- if (imgp->ip_strings)
+ }
+ if (imgp->ip_strings) {
execargs_free(imgp);
+ }
#if CONFIG_MACF
- if (imgp->ip_execlabelp)
+ if (imgp->ip_execlabelp) {
mac_cred_label_free(imgp->ip_execlabelp);
- if (imgp->ip_scriptlabelp)
+ }
+ if (imgp->ip_scriptlabelp) {
mac_vnode_label_free(imgp->ip_scriptlabelp);
+ }
#endif
if (imgp->ip_cs_error != OS_REASON_NULL) {
os_reason_free(imgp->ip_cs_error);
}
if (!error) {
- task_bank_init(get_threadtask(imgp->ip_new_thread));
+ task_bank_init(new_task);
proc_transend(p, 0);
+#if __arm64__
+ proc_legacy_footprint_entitled(p, new_task, __FUNCTION__);
+ proc_ios13extended_footprint_entitled(p, new_task, __FUNCTION__);
+#endif /* __arm64__ */
+
/* Sever any extant thread affinity */
thread_affinity_exec(current_thread());
/* Inherit task role from old task to new task for exec */
if (!in_vfexec) {
- proc_inherit_task_role(get_threadtask(imgp->ip_new_thread), current_task());
+ proc_inherit_task_role(new_task, old_task);
}
thread_t main_thread = imgp->ip_new_thread;
task_set_main_thread_qos(new_task, main_thread);
+#if CONFIG_ARCADE
+ /*
+ * Check to see if we need to trigger an arcade upcall AST now
+ * that the vnode has been reset on the task.
+ */
+ arcade_prepare(new_task, imgp->ip_new_thread);
+#endif /* CONFIG_ARCADE */
+
#if CONFIG_MACF
/*
* Processes with the MAP_JIT entitlement are permitted to have
*/
if (mac_proc_check_map_anon(p, 0, 0, 0, MAP_JIT, NULL) == 0) {
vm_map_set_jumbo(get_task_map(new_task));
+ vm_map_set_jit_entitled(get_task_map(new_task));
}
#endif /* CONFIG_MACF */
+ if (vm_darkwake_mode == TRUE) {
+ /*
+ * This process is being launched when the system
+ * is in darkwake. So mark it specially. This will
+ * cause all its pages to be entered in the background Q.
+ */
+ task_set_darkwake_mode(new_task, vm_darkwake_mode);
+ }
#if CONFIG_DTRACE
dtrace_thread_didexec(imgp->ip_new_thread);
- if ((dtrace_proc_waitfor_hook = dtrace_proc_waitfor_exec_ptr) != NULL)
+ if ((dtrace_proc_waitfor_hook = dtrace_proc_waitfor_exec_ptr) != NULL) {
(*dtrace_proc_waitfor_hook)(p);
+ }
+#endif
+
+#if CONFIG_AUDIT
+ if (!error && AUDIT_ENABLED() && p) {
+ /* Add the CDHash of the new process to the audit record */
+ uint8_t *cdhash = cs_get_cdhash(p);
+ if (cdhash) {
+ AUDIT_ARG(data, cdhash, sizeof(uint8_t), CS_CDHASH_LEN);
+ }
+ }
#endif
if (in_vfexec) {
/*
* clear bsd_info from old task if it did exec.
*/
- if (task_did_exec(current_task())) {
- set_bsdtask_info(current_task(), NULL);
+ if (task_did_exec(old_task)) {
+ set_bsdtask_info(old_task, NULL);
}
/* clear bsd_info from new task and terminate it if exec failed */
task_terminate_internal(new_task);
}
- /*
- * Need to transfer pending watch port boosts to the new task while still making
- * sure that the old task remains in the importance linkage. Create an importance
- * linkage from old task to new task, then switch the task importance base
- * of old task and new task. After the switch the port watch boost will be
- * boosting the new task and new task will be donating importance to old task.
- */
- if (error == 0 && task_did_exec(current_task())) {
- inherit = ipc_importance_exec_switch_task(current_task(), get_threadtask(imgp->ip_new_thread));
- }
-
if (imgp != NULL) {
+ /* Clear the initial wait on the thread transferring watchports */
+ if (imgp->ip_new_thread) {
+ task_clear_return_wait(get_threadtask(imgp->ip_new_thread), TCRW_CLEAR_INITIAL_WAIT);
+ }
+
+ /* Transfer the watchport boost to new task */
+ if (!error && !in_vfexec) {
+ task_transfer_turnstile_watchports(old_task,
+ new_task, imgp->ip_new_thread);
+ }
/*
* Do not terminate the current task, if proc_exec_switch_task did not
* switch the tasks, terminating the current task without the switch would
* result in loosing the SIGKILL status.
*/
- if (task_did_exec(current_task())) {
+ if (task_did_exec(old_task)) {
/* Terminate the current task, since exec will start in new task */
- task_terminate_internal(current_task());
+ task_terminate_internal(old_task);
}
/* Release the thread ref returned by fork_create_child */
if (imgp->ip_new_thread) {
/* wake up the new exec thread */
- task_clear_return_wait(get_threadtask(imgp->ip_new_thread));
+ task_clear_return_wait(get_threadtask(imgp->ip_new_thread), TCRW_CLEAR_FINAL_WAIT);
thread_deallocate(imgp->ip_new_thread);
imgp->ip_new_thread = NULL;
}
if (inherit != NULL) {
ipc_importance_release(inherit);
}
-
- return(error);
+
+ return error;
}
if (ptr_size == 4) {
/* 64 bit value containing 32 bit address */
- unsigned int i;
+ unsigned int i = 0;
error = copyin(froma, &i, 4);
- *toptr = CAST_USER_ADDR_T(i); /* SAFE */
+ *toptr = CAST_USER_ADDR_T(i); /* SAFE */
} else {
error = copyin(froma, toptr, 8);
}
- return (error);
+ return error;
}
if (ptr_size == 4) {
/* 64 bit value containing 32 bit address */
- unsigned int i = CAST_DOWN_EXPLICIT(unsigned int,ua); /* SAFE */
+ unsigned int i = CAST_DOWN_EXPLICIT(unsigned int, ua); /* SAFE */
error = copyout(&i, ptr, 4);
} else {
error = copyout(&ua, ptr, 8);
}
- return (error);
+ return error;
}
exec_copyout_strings(struct image_params *imgp, user_addr_t *stackp)
{
proc_t p = vfs_context_proc(imgp->ip_vfs_context);
- int ptr_size = (imgp->ip_flags & IMGPF_IS_64BIT) ? 8 : 4;
- int ptr_area_size;
+ int ptr_size = (imgp->ip_flags & IMGPF_IS_64BIT_ADDR) ? 8 : 4;
+ int ptr_area_size;
void *ptr_buffer_start, *ptr_buffer;
int string_size;
- user_addr_t string_area; /* *argv[], *env[] */
- user_addr_t ptr_area; /* argv[], env[], applev[] */
- user_addr_t argc_area; /* argc */
- user_addr_t stack;
+ user_addr_t string_area; /* *argv[], *env[] */
+ user_addr_t ptr_area; /* argv[], env[], applev[] */
+ user_addr_t argc_area; /* argc */
+ user_addr_t stack;
int error;
unsigned i;
struct copyout_desc {
- char *start_string;
- int count;
+ char *start_string;
+ int count;
#if CONFIG_DTRACE
- user_addr_t *dtrace_cookie;
+ user_addr_t *dtrace_cookie;
#endif
- boolean_t null_term;
+ boolean_t null_term;
} descriptors[] = {
{
.start_string = imgp->ip_startargv,
* Need room for one pointer for each string, plus
* one for the NULLs terminating the argv, envv, and apple areas.
*/
- ptr_area_size = (imgp->ip_argc + imgp->ip_envc + imgp->ip_applec + 3) *
- ptr_size;
+ ptr_area_size = (imgp->ip_argc + imgp->ip_envc + imgp->ip_applec + 3) * ptr_size;
stack -= ptr_area_size;
ptr_area = stack;
* Copy out the entire strings area.
*/
error = copyout(imgp->ip_strings, string_area,
- string_size);
- if (error)
+ string_size);
+ if (error) {
goto bad;
+ }
- for (i = 0; i < sizeof(descriptors)/sizeof(descriptors[0]); i++) {
+ for (i = 0; i < sizeof(descriptors) / sizeof(descriptors[0]); i++) {
char *cur_string = descriptors[i].start_string;
int j;
*/
for (j = 0; j < descriptors[i].count; j++) {
user_addr_t cur_address = string_area + (cur_string - imgp->ip_strings);
-
+
/* Copy out the pointer to the current string. Alignment has been verified */
if (ptr_size == 8) {
*(uint64_t *)ptr_buffer = (uint64_t)cur_address;
} else {
*(uint32_t *)ptr_buffer = (uint32_t)cur_address;
}
-
+
ptr_buffer = (void *)((uintptr_t)ptr_buffer + ptr_size);
cur_string += strlen(cur_string) + 1; /* Only a NUL between strings in the same area */
}
} else {
*(uint32_t *)ptr_buffer = 0;
}
-
+
ptr_buffer = (void *)((uintptr_t)ptr_buffer + ptr_size);
}
}
* Copy out all our pointer arrays in bulk.
*/
error = copyout(ptr_buffer_start, ptr_area,
- ptr_area_size);
- if (error)
+ ptr_area_size);
+ if (error) {
goto bad;
+ }
/* argc (int32, stored in a ptr_size area) */
error = copyoutptr((user_addr_t)imgp->ip_argc, argc_area, ptr_size);
- if (error)
+ if (error) {
goto bad;
+ }
bad:
- return(error);
+ return error;
}
exec_extract_strings(struct image_params *imgp)
{
int error = 0;
- int ptr_size = (imgp->ip_flags & IMGPF_WAS_64BIT) ? 8 : 4;
- int new_ptr_size = (imgp->ip_flags & IMGPF_IS_64BIT) ? 8 : 4;
- user_addr_t argv = imgp->ip_user_argv;
- user_addr_t envv = imgp->ip_user_envv;
+ int ptr_size = (imgp->ip_flags & IMGPF_WAS_64BIT_ADDR) ? 8 : 4;
+ int new_ptr_size = (imgp->ip_flags & IMGPF_IS_64BIT_ADDR) ? 8 : 4;
+ user_addr_t argv = imgp->ip_user_argv;
+ user_addr_t envv = imgp->ip_user_envv;
/*
* Adjust space reserved for the path name by however much padding it
- * needs. Doing this here since we didn't know if this would be a 32-
+ * needs. Doing this here since we didn't know if this would be a 32-
* or 64-bit process back in exec_save_path.
*/
while (imgp->ip_strspace % new_ptr_size != 0) {
imgp->ip_startargv = imgp->ip_strendp;
imgp->ip_argc = 0;
- if((imgp->ip_flags & IMGPF_INTERPRET) != 0) {
- user_addr_t arg;
+ if ((imgp->ip_flags & IMGPF_INTERPRET) != 0) {
+ user_addr_t arg;
char *argstart, *ch;
/* First, the arguments in the "#!" string are tokenized and extracted. */
}
/* Error-check, regardless of whether this is the last interpreter arg or not */
- if (error)
+ if (error) {
goto bad;
+ }
if (imgp->ip_argspace < new_ptr_size) {
error = E2BIG;
goto bad;
* to locate their script arguments.
*/
error = copyinptr(argv, &arg, ptr_size);
- if (error)
+ if (error) {
goto bad;
+ }
if (arg != 0LL) {
argv += ptr_size; /* consume without using */
}
} else {
error = exec_add_user_string(imgp, imgp->ip_user_fname, imgp->ip_seg, TRUE);
}
-
- if (error)
+
+ if (error) {
goto bad;
+ }
if (imgp->ip_argspace < new_ptr_size) {
error = E2BIG;
goto bad;
}
while (argv != 0LL) {
- user_addr_t arg;
+ user_addr_t arg;
error = copyinptr(argv, &arg, ptr_size);
- if (error)
+ if (error) {
goto bad;
+ }
if (arg == 0LL) {
break;
argv += ptr_size;
/*
- * av[n...] = arg[n]
- */
+ * av[n...] = arg[n]
+ */
error = exec_add_user_string(imgp, arg, imgp->ip_seg, TRUE);
- if (error)
+ if (error) {
goto bad;
+ }
if (imgp->ip_argspace < new_ptr_size) {
error = E2BIG;
goto bad;
}
imgp->ip_argspace -= new_ptr_size; /* to hold argv[] entry */
imgp->ip_argc++;
- }
+ }
/* Save space for argv[] NULL terminator */
if (imgp->ip_argspace < new_ptr_size) {
goto bad;
}
imgp->ip_argspace -= new_ptr_size;
-
+
/* Note where the args ends and env begins. */
imgp->ip_endargv = imgp->ip_strendp;
imgp->ip_envc = 0;
/* Now, get the environment */
while (envv != 0LL) {
- user_addr_t env;
+ user_addr_t env;
error = copyinptr(envv, &env, ptr_size);
- if (error)
+ if (error) {
goto bad;
+ }
envv += ptr_size;
if (env == 0LL) {
break;
}
/*
- * av[n...] = env[n]
- */
+ * av[n...] = env[n]
+ */
error = exec_add_user_string(imgp, env, imgp->ip_seg, TRUE);
- if (error)
+ if (error) {
goto bad;
+ }
if (imgp->ip_argspace < new_ptr_size) {
error = E2BIG;
goto bad;
imgp->ip_strspace--;
imgp->ip_argspace--;
}
-
+
/* Note where the envv ends and applev begins. */
imgp->ip_endenvv = imgp->ip_strendp;
* 8-byte guard. Until somebody needs more than an 8-byte guard value, don't
* do the work to construct them.
*/
-#define GUARD_VALUES 1
-#define GUARD_KEY "stack_guard="
+#define GUARD_VALUES 1
+#define GUARD_KEY "stack_guard="
/*
* System malloc needs some entropy when it is initialized.
*/
-#define ENTROPY_VALUES 2
+#define ENTROPY_VALUES 2
#define ENTROPY_KEY "malloc_entropy="
+/*
+ * libplatform needs a random pointer-obfuscation value when it is initialized.
+ */
+#define PTR_MUNGE_VALUES 1
+#define PTR_MUNGE_KEY "ptr_munge="
+
/*
* System malloc engages nanozone for UIAPP.
*/
#define FSID_KEY "executable_file="
#define DYLD_FSID_KEY "dyld_file="
#define CDHASH_KEY "executable_cdhash="
+#define DYLD_FLAGS_KEY "dyld_flags="
#define FSID_MAX_STRING "0x1234567890abcdef,0x1234567890abcdef"
static int
exec_add_entropy_key(struct image_params *imgp,
- const char *key,
- int values,
- boolean_t embedNUL)
+ const char *key,
+ int values,
+ boolean_t embedNUL)
{
const int limit = 8;
uint64_t entropy[limit];
values = limit;
}
- read_random(entropy, sizeof(entropy[0]) * values);
+ read_random(entropy, sizeof(entropy[0]) * values);
if (embedNUL) {
entropy[0] &= ~(0xffull << 8);
}
- int len = snprintf(str, sizeof(str), "%s0x%llx", key, entropy[0]);
+ int len = scnprintf(str, sizeof(str), "%s0x%llx", key, entropy[0]);
int remaining = sizeof(str) - len;
for (int i = 1; i < values && remaining > 0; ++i) {
int start = sizeof(str) - remaining;
- len = snprintf(&str[start], remaining, ",0x%llx", entropy[i]);
+ len = scnprintf(&str[start], remaining, ",0x%llx", entropy[i]);
remaining -= len;
}
/*
* Build up the contents of the apple[] string vector
*/
+#if (DEVELOPMENT || DEBUG)
+uint64_t dyld_flags = 0;
+#endif
+
static int
exec_add_apple_strings(struct image_params *imgp,
- const load_result_t *load_result)
+ const load_result_t *load_result)
{
int error;
- int img_ptr_size = (imgp->ip_flags & IMGPF_IS_64BIT) ? 8 : 4;
+ int img_ptr_size = (imgp->ip_flags & IMGPF_IS_64BIT_ADDR) ? 8 : 4;
/* exec_save_path stored the first string */
imgp->ip_applec = 1;
if ((proc_flags & _POSIX_SPAWN_NANO_ALLOCATOR) == _POSIX_SPAWN_NANO_ALLOCATOR) {
const char *nano_string = NANO_ENGAGE_KEY;
error = exec_add_user_string(imgp, CAST_USER_ADDR_T(nano_string), UIO_SYSSPACE, FALSE);
- if (error){
+ if (error) {
goto bad;
}
imgp->ip_applec++;
}
imgp->ip_applec++;
- /*
+ /*
+ * Supply libpthread & libplatform with a random value to use for pointer
+ * obfuscation.
+ */
+ error = exec_add_entropy_key(imgp, PTR_MUNGE_KEY, PTR_MUNGE_VALUES, FALSE);
+ if (error) {
+ goto bad;
+ }
+ imgp->ip_applec++;
+
+ /*
* Add MAIN_STACK_KEY: Supplies the address and size of the main thread's
* stack if it was allocated by the kernel.
*
if (load_result->unixproc) {
char stack_string[strlen(MAIN_STACK_KEY) + (HEX_STR_LEN + 1) * MAIN_STACK_VALUES + 1];
snprintf(stack_string, sizeof(stack_string),
- MAIN_STACK_KEY "0x%llx,0x%llx,0x%llx,0x%llx",
- (uint64_t)load_result->user_stack,
- (uint64_t)load_result->user_stack_size,
- (uint64_t)load_result->user_stack_alloc,
- (uint64_t)load_result->user_stack_alloc_size);
+ MAIN_STACK_KEY "0x%llx,0x%llx,0x%llx,0x%llx",
+ (uint64_t)load_result->user_stack,
+ (uint64_t)load_result->user_stack_size,
+ (uint64_t)load_result->user_stack_alloc,
+ (uint64_t)load_result->user_stack_alloc_size);
error = exec_add_user_string(imgp, CAST_USER_ADDR_T(stack_string), UIO_SYSSPACE, FALSE);
if (error) {
goto bad;
}
if (imgp->ip_vattr) {
- uint64_t fsid = get_va_fsid(imgp->ip_vattr);
+ uint64_t fsid = vnode_get_va_fsid(imgp->ip_vattr);
uint64_t fsobjid = imgp->ip_vattr->va_fileid;
char fsid_string[strlen(FSID_KEY) + strlen(FSID_MAX_STRING) + 1];
snprintf(fsid_string, sizeof(fsid_string),
- FSID_KEY "0x%llx,0x%llx", fsid, fsobjid);
+ FSID_KEY "0x%llx,0x%llx", fsid, fsobjid);
error = exec_add_user_string(imgp, CAST_USER_ADDR_T(fsid_string), UIO_SYSSPACE, FALSE);
if (error) {
goto bad;
imgp->ip_applec++;
}
- if (imgp->ip_dyld_fsid || imgp->ip_dyld_fsobjid ) {
+ if (imgp->ip_dyld_fsid || imgp->ip_dyld_fsobjid) {
char fsid_string[strlen(DYLD_FSID_KEY) + strlen(FSID_MAX_STRING) + 1];
snprintf(fsid_string, sizeof(fsid_string),
- DYLD_FSID_KEY "0x%llx,0x%llx", imgp->ip_dyld_fsid, imgp->ip_dyld_fsobjid);
+ DYLD_FSID_KEY "0x%llx,0x%llx", imgp->ip_dyld_fsid, imgp->ip_dyld_fsobjid);
error = exec_add_user_string(imgp, CAST_USER_ADDR_T(fsid_string), UIO_SYSSPACE, FALSE);
if (error) {
goto bad;
}
imgp->ip_applec++;
}
-
- uint8_t cdhash[SHA1_RESULTLEN];
+
+ uint8_t cdhash[SHA1_RESULTLEN];
int cdhash_errror = ubc_cs_getcdhash(imgp->ip_vp, imgp->ip_arch_offset, cdhash);
if (cdhash_errror == 0) {
- char hash_string[strlen(CDHASH_KEY) + 2*SHA1_RESULTLEN + 1];
+ char hash_string[strlen(CDHASH_KEY) + 2 * SHA1_RESULTLEN + 1];
strncpy(hash_string, CDHASH_KEY, sizeof(hash_string));
- char *p = hash_string + sizeof(CDHASH_KEY) - 1;
- for (int i = 0; i < SHA1_RESULTLEN; i++) {
+ char *p = hash_string + sizeof(CDHASH_KEY) - 1;
+ for (int i = 0; i < SHA1_RESULTLEN; i++) {
snprintf(p, 3, "%02x", (int) cdhash[i]);
- p += 2;
+ p += 2;
}
error = exec_add_user_string(imgp, CAST_USER_ADDR_T(hash_string), UIO_SYSSPACE, FALSE);
if (error) {
}
imgp->ip_applec++;
}
+#if (DEVELOPMENT || DEBUG)
+ if (dyld_flags) {
+ char dyld_flags_string[strlen(DYLD_FLAGS_KEY) + HEX_STR_LEN + 1];
+ snprintf(dyld_flags_string, sizeof(dyld_flags_string), DYLD_FLAGS_KEY "0x%llx", dyld_flags);
+ error = exec_add_user_string(imgp, CAST_USER_ADDR_T(dyld_flags_string), UIO_SYSSPACE, FALSE);
+ if (error) {
+ goto bad;
+ }
+ imgp->ip_applec++;
+ }
+#endif
/* Align the tail of the combined applev area */
while (imgp->ip_strspace % img_ptr_size != 0) {
return error;
}
-#define unix_stack_size(p) (p->p_rlimit[RLIMIT_STACK].rlim_cur)
+#define unix_stack_size(p) (p->p_rlimit[RLIMIT_STACK].rlim_cur)
/*
* exec_check_permissions
kauth_action_t action;
/* Only allow execution of regular files */
- if (!vnode_isreg(vp))
- return (EACCES);
-
+ if (!vnode_isreg(vp)) {
+ return EACCES;
+ }
+
/* Get the file attributes that we will be using here and elsewhere */
VATTR_INIT(vap);
VATTR_WANTED(vap, va_uid);
VATTR_WANTED(vap, va_fsid64);
VATTR_WANTED(vap, va_fileid);
VATTR_WANTED(vap, va_data_size);
- if ((error = vnode_getattr(vp, vap, imgp->ip_vfs_context)) != 0)
- return (error);
+ if ((error = vnode_getattr(vp, vap, imgp->ip_vfs_context)) != 0) {
+ return error;
+ }
/*
* Ensure that at least one execute bit is on - otherwise root
* will always succeed, and we don't want to happen unless the
* file really is executable.
*/
- if (!vfs_authopaque(vnode_mount(vp)) && ((vap->va_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0))
- return (EACCES);
+ if (!vfs_authopaque(vnode_mount(vp)) && ((vap->va_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
+ return EACCES;
+ }
/* Disallow zero length files */
- if (vap->va_data_size == 0)
- return (ENOEXEC);
+ if (vap->va_data_size == 0) {
+ return ENOEXEC;
+ }
imgp->ip_arch_offset = (user_size_t)0;
imgp->ip_arch_size = vap->va_data_size;
/* Disable setuid-ness for traced programs or if MNT_NOSUID */
- if ((vp->v_mount->mnt_flag & MNT_NOSUID) || (p->p_lflag & P_LTRACED))
+ if ((vp->v_mount->mnt_flag & MNT_NOSUID) || (p->p_lflag & P_LTRACED)) {
vap->va_mode &= ~(VSUID | VSGID);
+ }
/*
* Disable _POSIX_SPAWN_ALLOW_DATA_EXEC and _POSIX_SPAWN_DISABLE_ASLR
* flags for setuid/setgid binaries.
*/
- if (vap->va_mode & (VSUID | VSGID))
+ if (vap->va_mode & (VSUID | VSGID)) {
imgp->ip_flags &= ~(IMGPF_ALLOW_DATA_EXEC | IMGPF_DISABLE_ASLR);
+ }
#if CONFIG_MACF
error = mac_vnode_check_exec(imgp->ip_vfs_context, vp, imgp);
- if (error)
- return (error);
+ if (error) {
+ return error;
+ }
#endif
- /* Check for execute permission */
- action = KAUTH_VNODE_EXECUTE;
- /* Traced images must also be readable */
- if (p->p_lflag & P_LTRACED)
- action |= KAUTH_VNODE_READ_DATA;
- if ((error = vnode_authorize(vp, NULL, action, imgp->ip_vfs_context)) != 0)
- return (error);
+ /* Check for execute permission */
+ action = KAUTH_VNODE_EXECUTE;
+ /* Traced images must also be readable */
+ if (p->p_lflag & P_LTRACED) {
+ action |= KAUTH_VNODE_READ_DATA;
+ }
+ if ((error = vnode_authorize(vp, NULL, action, imgp->ip_vfs_context)) != 0) {
+ return error;
+ }
#if 0
/* Don't let it run if anyone had it open for writing */
if (vp->v_writecount) {
panic("going to return ETXTBSY %x", vp);
vnode_unlock(vp);
- return (ETXTBSY);
+ return ETXTBSY;
}
vnode_unlock(vp);
#endif
/* XXX May want to indicate to underlying FS that vnode is open */
- return (error);
+ return error;
}
static int
exec_handle_sugid(struct image_params *imgp)
{
- proc_t p = vfs_context_proc(imgp->ip_vfs_context);
- kauth_cred_t cred = vfs_context_ucred(imgp->ip_vfs_context);
- kauth_cred_t my_cred, my_new_cred;
- int i;
- int leave_sugid_clear = 0;
- int mac_reset_ipc = 0;
- int error = 0;
- task_t task = NULL;
+ proc_t p = vfs_context_proc(imgp->ip_vfs_context);
+ kauth_cred_t cred = vfs_context_ucred(imgp->ip_vfs_context);
+ int i;
+ int leave_sugid_clear = 0;
+ int mac_reset_ipc = 0;
+ int error = 0;
+ task_t task = NULL;
#if CONFIG_MACF
- int mac_transition, disjoint_cred = 0;
- int label_update_return = 0;
+ int mac_transition, disjoint_cred = 0;
+ int label_update_return = 0;
/*
* Determine whether a call to update the MAC label will result in the
* slow down the exec fast path for normal binaries.
*/
mac_transition = mac_cred_check_label_update_execve(
- imgp->ip_vfs_context,
- imgp->ip_vp,
- imgp->ip_arch_offset,
- imgp->ip_scriptvp,
- imgp->ip_scriptlabelp,
- imgp->ip_execlabelp,
- p,
- imgp->ip_px_smpx);
+ imgp->ip_vfs_context,
+ imgp->ip_vp,
+ imgp->ip_arch_offset,
+ imgp->ip_scriptvp,
+ imgp->ip_scriptlabelp,
+ imgp->ip_execlabelp,
+ p,
+ imgp->ip_px_smpx);
#endif
OSBitAndAtomic(~((uint32_t)P_SUGID), &p->p_flag);
* such a call.
*/
if (((imgp->ip_origvattr->va_mode & VSUID) != 0 &&
- kauth_cred_getuid(cred) != imgp->ip_origvattr->va_uid) ||
+ kauth_cred_getuid(cred) != imgp->ip_origvattr->va_uid) ||
((imgp->ip_origvattr->va_mode & VSGID) != 0 &&
- ((kauth_cred_ismember_gid(cred, imgp->ip_origvattr->va_gid, &leave_sugid_clear) || !leave_sugid_clear) ||
- (kauth_cred_getgid(cred) != imgp->ip_origvattr->va_gid)))) {
-
+ ((kauth_cred_ismember_gid(cred, imgp->ip_origvattr->va_gid, &leave_sugid_clear) || !leave_sugid_clear) ||
+ (kauth_cred_getgid(cred) != imgp->ip_origvattr->va_gid))) ||
+ (imgp->ip_sc_port != NULL)) {
#if CONFIG_MACF
/* label for MAC transition and neither VSUID nor VSGID */
handle_mac_transition:
* proc's ucred lock. This prevents others from accessing
* a garbage credential.
*/
- while (imgp->ip_origvattr->va_mode & VSUID) {
- my_cred = kauth_cred_proc_ref(p);
- my_new_cred = kauth_cred_setresuid(my_cred, KAUTH_UID_NONE, imgp->ip_origvattr->va_uid, imgp->ip_origvattr->va_uid, KAUTH_UID_NONE);
-
- if (my_new_cred == my_cred) {
- kauth_cred_unref(&my_cred);
- break;
- }
- /* update cred on proc */
- proc_ucred_lock(p);
+ if (imgp->ip_sc_port != NULL) {
+ extern int suid_cred_verify(ipc_port_t, vnode_t, uint32_t *);
+ int ret = -1;
+ uid_t uid = UINT32_MAX;
- if (p->p_ucred != my_cred) {
- proc_ucred_unlock(p);
- kauth_cred_unref(&my_new_cred);
- continue;
+ /*
+ * Check that the vnodes match. If a script is being
+ * executed check the script's vnode rather than the
+ * interpreter's.
+ */
+ struct vnode *vp = imgp->ip_scriptvp != NULL ? imgp->ip_scriptvp : imgp->ip_vp;
+
+ ret = suid_cred_verify(imgp->ip_sc_port, vp, &uid);
+ if (ret == 0) {
+ apply_kauth_cred_update(p, ^kauth_cred_t (kauth_cred_t my_cred) {
+ return kauth_cred_setresuid(my_cred,
+ KAUTH_UID_NONE,
+ uid,
+ uid,
+ KAUTH_UID_NONE);
+ });
+ } else {
+ error = EPERM;
}
-
- /* donate cred reference on my_new_cred to p->p_ucred */
- p->p_ucred = my_new_cred;
- PROC_UPDATE_CREDS_ONPROC(p);
- proc_ucred_unlock(p);
-
- /* drop additional reference that was taken on the previous cred */
- kauth_cred_unref(&my_cred);
-
- break;
}
- while (imgp->ip_origvattr->va_mode & VSGID) {
- my_cred = kauth_cred_proc_ref(p);
- my_new_cred = kauth_cred_setresgid(my_cred, KAUTH_GID_NONE, imgp->ip_origvattr->va_gid, imgp->ip_origvattr->va_gid);
-
- if (my_new_cred == my_cred) {
- kauth_cred_unref(&my_cred);
- break;
- }
-
- /* update cred on proc */
- proc_ucred_lock(p);
-
- if (p->p_ucred != my_cred) {
- proc_ucred_unlock(p);
- kauth_cred_unref(&my_new_cred);
- continue;
- }
-
- /* donate cred reference on my_new_cred to p->p_ucred */
- p->p_ucred = my_new_cred;
- PROC_UPDATE_CREDS_ONPROC(p);
- proc_ucred_unlock(p);
-
- /* drop additional reference that was taken on the previous cred */
- kauth_cred_unref(&my_cred);
+ if (imgp->ip_origvattr->va_mode & VSUID) {
+ apply_kauth_cred_update(p, ^kauth_cred_t (kauth_cred_t my_cred) {
+ return kauth_cred_setresuid(my_cred,
+ KAUTH_UID_NONE,
+ imgp->ip_origvattr->va_uid,
+ imgp->ip_origvattr->va_uid,
+ KAUTH_UID_NONE);
+ });
+ }
- break;
+ if (imgp->ip_origvattr->va_mode & VSGID) {
+ apply_kauth_cred_update(p, ^kauth_cred_t (kauth_cred_t my_cred) {
+ return kauth_cred_setresgid(my_cred,
+ KAUTH_GID_NONE,
+ imgp->ip_origvattr->va_gid,
+ imgp->ip_origvattr->va_gid);
+ });
}
#endif /* !SECURE_KERNEL */
#if CONFIG_MACF
- /*
+ /*
* If a policy has indicated that it will transition the label,
* before making the call into the MAC policies, get a new
* duplicate credential, so they can modify it without
* modifying any others sharing it.
*/
- if (mac_transition) {
+ if (mac_transition) {
/*
* This hook may generate upcalls that require
* importance donation from the kernel.
thread_t thread = current_thread();
thread_enable_send_importance(thread, TRUE);
kauth_proc_label_update_execve(p,
- imgp->ip_vfs_context,
- imgp->ip_vp,
- imgp->ip_arch_offset,
- imgp->ip_scriptvp,
- imgp->ip_scriptlabelp,
- imgp->ip_execlabelp,
- &imgp->ip_csflags,
- imgp->ip_px_smpx,
- &disjoint_cred, /* will be non zero if disjoint */
- &label_update_return);
+ imgp->ip_vfs_context,
+ imgp->ip_vp,
+ imgp->ip_arch_offset,
+ imgp->ip_scriptvp,
+ imgp->ip_scriptlabelp,
+ imgp->ip_execlabelp,
+ &imgp->ip_csflags,
+ imgp->ip_px_smpx,
+ &disjoint_cred, /* will be non zero if disjoint */
+ &label_update_return);
thread_enable_send_importance(thread, FALSE);
if (disjoint_cred) {
*/
leave_sugid_clear = 0;
}
-
+
imgp->ip_mac_return = label_update_return;
}
-
+
mac_reset_ipc = mac_proc_check_inherit_ipc_ports(p, p->p_textvp, p->p_textoff, imgp->ip_vp, imgp->ip_arch_offset, imgp->ip_scriptvp);
-#endif /* CONFIG_MACF */
+#endif /* CONFIG_MACF */
/*
* If 'leave_sugid_clear' is non-zero, then we passed the
* the previous cred was a member of the VSGID group, but
* that it was not the default at the time of the execve,
* and that the post-labelling credential was not disjoint.
- * So we don't set the P_SUGID or reset mach ports and fds
+ * So we don't set the P_SUGID or reset mach ports and fds
* on the basis of simply running this code.
*/
if (mac_reset_ipc || !leave_sugid_clear) {
* task/thread after.
*/
ipc_task_reset((imgp->ip_new_thread != NULL) ?
- get_threadtask(imgp->ip_new_thread) : p->task);
+ get_threadtask(imgp->ip_new_thread) : p->task);
ipc_thread_reset((imgp->ip_new_thread != NULL) ?
- imgp->ip_new_thread : current_thread());
+ imgp->ip_new_thread : current_thread());
}
if (!leave_sugid_clear) {
* to libc.
*/
for (i = 0; i < 3; i++) {
-
- if (p->p_fd->fd_ofiles[i] != NULL)
+ if (p->p_fd->fd_ofiles[i] != NULL) {
continue;
+ }
/*
* Do the kernel equivalent of
*
- * if i == 0
- * (void) open("/dev/null", O_RDONLY);
- * else
- * (void) open("/dev/null", O_WRONLY);
+ * if i == 0
+ * (void) open("/dev/null", O_RDONLY);
+ * else
+ * (void) open("/dev/null", O_WRONLY);
*/
struct fileproc *fp;
int flag;
struct nameidata *ndp = NULL;
- if (i == 0)
+ if (i == 0) {
flag = FREAD;
- else
+ } else {
flag = FWRITE;
+ }
if ((error = falloc(p,
- &fp, &indx, imgp->ip_vfs_context)) != 0)
+ &fp, &indx, imgp->ip_vfs_context)) != 0) {
continue;
+ }
MALLOC(ndp, struct nameidata *, sizeof(*ndp), M_TEMP, M_WAITOK | M_ZERO);
if (ndp == NULL) {
}
}
-#endif /* CONFIG_MACF */
+#endif /* CONFIG_MACF */
/*
* Implement the semantic where the effective user and group become
* proc's ucred lock. This prevents others from accessing
* a garbage credential.
*/
- for (;;) {
- my_cred = kauth_cred_proc_ref(p);
- my_new_cred = kauth_cred_setsvuidgid(my_cred, kauth_cred_getuid(my_cred), kauth_cred_getgid(my_cred));
-
- if (my_new_cred == my_cred) {
- kauth_cred_unref(&my_cred);
- break;
- }
-
- /* update cred on proc */
- proc_ucred_lock(p);
-
- if (p->p_ucred != my_cred) {
- proc_ucred_unlock(p);
- kauth_cred_unref(&my_new_cred);
- continue;
- }
-
- /* donate cred reference on my_new_cred to p->p_ucred */
- p->p_ucred = my_new_cred;
- PROC_UPDATE_CREDS_ONPROC(p);
- proc_ucred_unlock(p);
-
- /* drop additional reference that was taken on the previous cred */
- kauth_cred_unref(&my_cred);
-
- break;
- }
-
+ apply_kauth_cred_update(p, ^kauth_cred_t (kauth_cred_t my_cred) {
+ return kauth_cred_setsvuidgid(my_cred,
+ kauth_cred_getuid(my_cred),
+ kauth_cred_getgid(my_cred));
+ });
/* Update the process' identity version and set the security token */
- p->p_idversion++;
+ p->p_idversion = OSIncrementAtomic(&nextpidversion);
if (imgp->ip_new_thread != NULL) {
task = get_threadtask(imgp->ip_new_thread);
}
set_security_token_task_internal(p, task);
- return(error);
+ return error;
}
* !KERN_SUCCESS Mach failure code
*/
static kern_return_t
-create_unix_stack(vm_map_t map, load_result_t* load_result,
- proc_t p)
+create_unix_stack(vm_map_t map, load_result_t* load_result,
+ proc_t p)
{
- mach_vm_size_t size, prot_size;
- mach_vm_offset_t addr, prot_addr;
- kern_return_t kr;
+ mach_vm_size_t size, prot_size;
+ mach_vm_offset_t addr, prot_addr;
+ kern_return_t kr;
+
+ mach_vm_address_t user_stack = load_result->user_stack;
- mach_vm_address_t user_stack = load_result->user_stack;
-
proc_lock(p);
p->user_stack = user_stack;
+ if (load_result->custom_stack) {
+ p->p_lflag |= P_LCUSTOM_STACK;
+ }
proc_unlock(p);
if (load_result->user_stack_alloc_size > 0) {
}
addr = mach_vm_trunc_page(load_result->user_stack - size);
kr = mach_vm_allocate_kernel(map, &addr, size,
- VM_FLAGS_FIXED, VM_MEMORY_STACK);
+ VM_FLAGS_FIXED, VM_MEMORY_STACK);
if (kr != KERN_SUCCESS) {
// Can't allocate at default location, try anywhere
addr = 0;
kr = mach_vm_allocate_kernel(map, &addr, size,
- VM_FLAGS_ANYWHERE, VM_MEMORY_STACK);
+ VM_FLAGS_ANYWHERE, VM_MEMORY_STACK);
if (kr != KERN_SUCCESS) {
return kr;
}
* size limit for this process.
*/
if (load_result->user_stack_size == 0) {
+ proc_list_lock();
load_result->user_stack_size = unix_stack_size(p);
+ proc_list_unlock();
prot_size = mach_vm_trunc_page(size - load_result->user_stack_size);
} else {
prot_size = PAGE_SIZE;
prot_addr = addr;
kr = mach_vm_protect(map,
- prot_addr,
- prot_size,
- FALSE,
- VM_PROT_NONE);
+ prot_addr,
+ prot_size,
+ FALSE,
+ VM_PROT_NONE);
if (kr != KERN_SUCCESS) {
(void)mach_vm_deallocate(map, addr, size);
return kr;
* path NULL terminated path
*
* Returns: KERN_SUCCESS Success
- * !KERN_SUCCESS See execve/mac_execve for error codes
+ * !KERN_SUCCESS See execve/mac_execve for error codes
*
* Notes: The process that is passed in is the first manufactured
* process on the system, and gets here via bsd_ast() firing
size_t path_length = strlen(path) + 1;
argv0 = scratch_addr;
error = copyout(path, argv0, path_length);
- if (error)
+ if (error) {
return error;
+ }
scratch_addr = USER_ADDR_ALIGN(scratch_addr + path_length, sizeof(user_addr_t));
*/
if (boothowto & RB_SINGLE) {
const char *init_args = "-s";
- size_t init_args_length = strlen(init_args)+1;
+ size_t init_args_length = strlen(init_args) + 1;
argv1 = scratch_addr;
error = copyout(init_args, argv1, init_args_length);
- if (error)
+ if (error) {
return error;
+ }
scratch_addr = USER_ADDR_ALIGN(scratch_addr + init_args_length, sizeof(user_addr_t));
}
if (proc_is64bit(p)) {
- user64_addr_t argv64bit[3];
+ user64_addr_t argv64bit[3] = {};
argv64bit[0] = argv0;
argv64bit[1] = argv1;
argv64bit[2] = USER_ADDR_NULL;
error = copyout(argv64bit, scratch_addr, sizeof(argv64bit));
- if (error)
+ if (error) {
return error;
+ }
} else {
- user32_addr_t argv32bit[3];
+ user32_addr_t argv32bit[3] = {};
argv32bit[0] = (user32_addr_t)argv0;
argv32bit[1] = (user32_addr_t)argv1;
argv32bit[2] = USER_ADDR_NULL;
error = copyout(argv32bit, scratch_addr, sizeof(argv32bit));
- if (error)
+ if (error) {
return error;
+ }
}
/*
if (PE_parse_boot_argn("launchdsuffix", launchd_suffix, sizeof(launchd_suffix))) {
char launchd_path[128];
boolean_t is_release_suffix = ((launchd_suffix[0] == 0) ||
- (strcmp(launchd_suffix, "release") == 0));
+ (strcmp(launchd_suffix, "release") == 0));
if (is_release_suffix) {
printf("load_init_program: attempting to load /sbin/launchd\n");
error = load_init_program_at_path(p, (user_addr_t)scratch_addr, "/sbin/launchd");
- if (!error)
+ if (!error) {
return;
+ }
panic("Process 1 exec of launchd.release failed, errno %d", error);
} else {
#endif
error = ENOENT;
- for (i = 0; i < sizeof(init_programs)/sizeof(init_programs[0]); i++) {
+ for (i = 0; i < sizeof(init_programs) / sizeof(init_programs[0]); i++) {
printf("load_init_program: attempting to load %s\n", init_programs[i]);
error = load_init_program_at_path(p, (user_addr_t)scratch_addr, init_programs[i]);
if (!error) {
}
}
- panic("Process 1 exec of %s failed, errno %d", ((i == 0) ? "<null>" : init_programs[i-1]), error);
+ panic("Process 1 exec of %s failed, errno %d", ((i == 0) ? "<null>" : init_programs[i - 1]), error);
}
/*
* EIO An I/O error occurred
* EBADEXEC The executable is corrupt/unknown
*/
-static int
+static int
load_return_to_errno(load_return_t lrtn)
{
switch (lrtn) {
return ENOENT;
case LOAD_IOERROR:
return EIO;
- case LOAD_FAILURE:
case LOAD_DECRYPTFAIL:
+ return EAUTH;
+ case LOAD_FAILURE:
default:
return EBADEXEC;
}
lck_mtx_t *execargs_cache_lock;
static void
-execargs_lock_lock(void) {
+execargs_lock_lock(void)
+{
lck_mtx_lock_spin(execargs_cache_lock);
}
static void
-execargs_lock_unlock(void) {
+execargs_lock_unlock(void)
+{
lck_mtx_unlock(execargs_cache_lock);
}
static wait_result_t
-execargs_lock_sleep(void) {
- return(lck_mtx_sleep(execargs_cache_lock, LCK_SLEEP_DEFAULT, &execargs_free_count, THREAD_INTERRUPTIBLE));
+execargs_lock_sleep(void)
+{
+ return lck_mtx_sleep(execargs_cache_lock, LCK_SLEEP_DEFAULT, &execargs_free_count, THREAD_INTERRUPTIBLE);
}
static kern_return_t
-execargs_purgeable_allocate(char **execarg_address) {
+execargs_purgeable_allocate(char **execarg_address)
+{
kern_return_t kr = vm_allocate_kernel(bsd_pageable_map, (vm_offset_t *)execarg_address, BSD_PAGEABLE_SIZE_PER_EXEC, VM_FLAGS_ANYWHERE | VM_FLAGS_PURGABLE, VM_KERN_MEMORY_NONE);
assert(kr == KERN_SUCCESS);
return kr;
}
static kern_return_t
-execargs_purgeable_reference(void *execarg_address) {
+execargs_purgeable_reference(void *execarg_address)
+{
int state = VM_PURGABLE_NONVOLATILE;
kern_return_t kr = vm_purgable_control(bsd_pageable_map, (vm_offset_t) execarg_address, VM_PURGABLE_SET_STATE, &state);
}
static kern_return_t
-execargs_purgeable_volatilize(void *execarg_address) {
+execargs_purgeable_volatilize(void *execarg_address)
+{
int state = VM_PURGABLE_VOLATILE | VM_PURGABLE_ORDERING_OBSOLETE;
kern_return_t kr;
kr = vm_purgable_control(bsd_pageable_map, (vm_offset_t) execarg_address, VM_PURGABLE_SET_STATE, &state);
}
static void
-execargs_wakeup_waiters(void) {
+execargs_wakeup_waiters(void)
+{
thread_wakeup(&execargs_free_count);
}
execargs_waiters--;
if (res != THREAD_AWAKENED) {
execargs_lock_unlock();
- return (EINTR);
+ return EINTR;
}
}
assert(execargs_free_count >= 0);
execargs_lock_unlock();
-
+
if (cache_index == -1) {
kret = execargs_purgeable_allocate(&imgp->ip_strings);
- }
- else
+ } else {
kret = execargs_purgeable_reference(imgp->ip_strings);
+ }
assert(kret == KERN_SUCCESS);
if (kret != KERN_SUCCESS) {
- return (ENOMEM);
+ return ENOMEM;
}
/* last page used to read in file headers */
- imgp->ip_vdata = imgp->ip_strings + ( NCARGS + PAGE_SIZE );
+ imgp->ip_vdata = imgp->ip_strings + (NCARGS + PAGE_SIZE);
imgp->ip_strendp = imgp->ip_strings;
imgp->ip_argspace = NCARGS;
- imgp->ip_strspace = ( NCARGS + PAGE_SIZE );
+ imgp->ip_strspace = (NCARGS + PAGE_SIZE);
- return (0);
+ return 0;
}
/*
kern_return_t kret;
int i;
boolean_t needs_wakeup = FALSE;
-
+
kret = execargs_purgeable_volatilize(imgp->ip_strings);
execargs_lock_lock();
assert(imgp->ip_strings == NULL);
- if (execargs_waiters > 0)
+ if (execargs_waiters > 0) {
needs_wakeup = TRUE;
-
+ }
+
execargs_lock_unlock();
- if (needs_wakeup == TRUE)
+ if (needs_wakeup == TRUE) {
execargs_wakeup_waiters();
+ }
- return ((kret == KERN_SUCCESS ? 0 : EINVAL));
+ return kret == KERN_SUCCESS ? 0 : EINVAL;
}
static void
vp = imgp->ip_vp;
offset = imgp->ip_arch_offset;
- if (vp == NULLVP)
+ if (vp == NULLVP) {
panic("exec_resettextvp: expected valid vp");
+ }
ret = vnode_ref(vp);
proc_lock(p);
p->p_textvp = vp;
p->p_textoff = offset;
} else {
- p->p_textvp = NULLVP; /* this is paranoia */
+ p->p_textvp = NULLVP; /* this is paranoia */
p->p_textoff = 0;
}
proc_unlock(p);
- if ( tvp != NULLVP) {
+ if (tvp != NULLVP) {
if (vnode_getwithref(tvp) == 0) {
vnode_rele(tvp);
vnode_put(tvp);
}
- }
-
+ }
}
// Includes the 0-byte (therefore "SIZE" instead of "LEN").
static const size_t CS_CDHASH_STRING_SIZE = CS_CDHASH_LEN * 2 + 1;
-static void cdhash_to_string(char str[CS_CDHASH_STRING_SIZE], uint8_t const * const cdhash) {
- static char const nibble[] = "0123456789abcdef";
-
- /* Apparently still the safest way to get a hex representation
- * of binary data.
- * xnu's printf routines have %*D/%20D in theory, but "not really", see:
- * <rdar://problem/33328859> confusion around %*D/%nD in printf
- */
- for (int i = 0; i < CS_CDHASH_LEN; ++i) {
- str[i*2] = nibble[(cdhash[i] & 0xf0) >> 4];
- str[i*2+1] = nibble[cdhash[i] & 0x0f];
- }
- str[CS_CDHASH_STRING_SIZE - 1] = 0;
-}
-
-/*
- * If the process is not signed or if it contains entitlements, we
- * need to communicate through the task_access_port to taskgated.
- *
- * taskgated will provide a detached code signature if present, and
- * will enforce any restrictions on entitlements.
- */
-
-static boolean_t
-taskgated_required(proc_t p, boolean_t *require_success)
+static void
+cdhash_to_string(char str[CS_CDHASH_STRING_SIZE], uint8_t const * const cdhash)
{
- size_t length;
- void *blob;
- int error;
-
- if (cs_debug > 2)
- csvnode_print_debug(p->p_textvp);
-
-#if !CONFIG_EMBEDDED
- const int can_skip_taskgated = csproc_get_platform_binary(p) && !csproc_get_platform_path(p);
-#else
- const int can_skip_taskgated = csproc_get_platform_binary(p);
-#endif
- if (can_skip_taskgated) {
- if (cs_debug) printf("taskgated not required for: %s\n", p->p_name);
- *require_success = FALSE;
- return FALSE;
- }
-
- if ((p->p_csflags & CS_VALID) == 0) {
- *require_success = FALSE;
- return TRUE;
- }
-
- error = cs_entitlements_blob_get(p, &blob, &length);
- if (error == 0 && blob != NULL) {
-#if !CONFIG_EMBEDDED
- /*
- * fatal on the desktop when entitlements are present,
- * unless we started in single-user mode
- */
- if ((boothowto & RB_SINGLE) == 0)
- *require_success = TRUE;
- /*
- * Allow initproc to run without causing taskgated to launch
- */
- if (p == initproc) {
- *require_success = FALSE;
- return FALSE;
- }
+ static char const nibble[] = "0123456789abcdef";
-#endif
- if (cs_debug) printf("taskgated required for: %s\n", p->p_name);
-
- return TRUE;
+ /* Apparently still the safest way to get a hex representation
+ * of binary data.
+ * xnu's printf routines have %*D/%20D in theory, but "not really", see:
+ * <rdar://problem/33328859> confusion around %*D/%nD in printf
+ */
+ for (int i = 0; i < CS_CDHASH_LEN; ++i) {
+ str[i * 2] = nibble[(cdhash[i] & 0xf0) >> 4];
+ str[i * 2 + 1] = nibble[cdhash[i] & 0x0f];
}
-
- *require_success = FALSE;
- return FALSE;
+ str[CS_CDHASH_STRING_SIZE - 1] = 0;
}
/*
* __EXEC_WAITING_ON_TASKGATED_CODE_SIGNATURE_UPCALL__
- *
+ *
* Description: Waits for the userspace daemon to respond to the request
- * we made. Function declared non inline to be visible in
+ * we made. Function declared non inline to be visible in
* stackshots and spindumps as well as debugging.
*/
-__attribute__((noinline)) int
+__attribute__((noinline)) int
__EXEC_WAITING_ON_TASKGATED_CODE_SIGNATURE_UPCALL__(mach_port_t task_access_port, int32_t new_pid)
{
return find_code_signature(task_access_port, new_pid);
static int
check_for_signature(proc_t p, struct image_params *imgp)
{
- mach_port_t port = NULL;
+ mach_port_t port = IPC_PORT_NULL;
kern_return_t kr = KERN_FAILURE;
int error = EACCES;
boolean_t unexpected_failure = FALSE;
- unsigned char hash[CS_CDHASH_LEN];
+ struct cs_blob *csb;
boolean_t require_success = FALSE;
int spawn = (imgp->ip_flags & IMGPF_SPAWN);
int vfexec = (imgp->ip_flags & IMGPF_VFORK_EXEC);
proc_unlock(p);
/* Set the switch_protect flag on the map */
- if(p->p_csflags & (CS_HARD|CS_KILL)) {
+ if (p->p_csflags & (CS_HARD | CS_KILL)) {
vm_map_switch_protect(get_task_map(p->task), TRUE);
}
* approve of exec, kill and return immediately.
*/
if (imgp->ip_mac_return != 0) {
-
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_SECURITY_POLICY, 0, 0);
+ p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_SECURITY_POLICY, 0, 0);
signature_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_SECURITY_POLICY);
error = imgp->ip_mac_return;
unexpected_failure = TRUE;
goto done;
}
- /* check if callout to taskgated is needed */
- if (!taskgated_required(p, &require_success)) {
+ /* If the code signature came through the image activation path, we skip the
+ * taskgated / externally attached path. */
+ if (imgp->ip_csflags & CS_SIGNED) {
error = 0;
goto done;
}
+ /* The rest of the code is for signatures that either already have been externally
+ * attached (likely, but not necessarily by a previous run through the taskgated
+ * path), or that will now be attached by taskgated. */
+
kr = task_get_task_access_port(p->task, &port);
if (KERN_SUCCESS != kr || !IPC_PORT_VALID(port)) {
error = 0;
if (require_success) {
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_CODESIGNING, CODESIGNING_EXIT_REASON_TASK_ACCESS_PORT, 0, 0);
+ p->p_pid, OS_REASON_CODESIGNING, CODESIGNING_EXIT_REASON_TASK_ACCESS_PORT, 0, 0);
signature_failure_reason = os_reason_create(OS_REASON_CODESIGNING, CODESIGNING_EXIT_REASON_TASK_ACCESS_PORT);
error = EACCES;
}
/*
* taskgated returns KERN_SUCCESS if it has completed its work
- * and the exec should continue, KERN_FAILURE if the exec should
- * fail, or it may error out with different error code in an
- * event of mig failure (e.g. process was signalled during the
+ * and the exec should continue, KERN_FAILURE if the exec should
+ * fail, or it may error out with different error code in an
+ * event of mig failure (e.g. process was signalled during the
* rpc call, taskgated died, mig server died etc.).
*/
error = EACCES;
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_CODESIGNING, CODESIGNING_EXIT_REASON_TASKGATED_INVALID_SIG, 0, 0);
+ p->p_pid, OS_REASON_CODESIGNING, CODESIGNING_EXIT_REASON_TASKGATED_INVALID_SIG, 0, 0);
signature_failure_reason = os_reason_create(OS_REASON_CODESIGNING, CODESIGNING_EXIT_REASON_TASKGATED_INVALID_SIG);
goto done;
default:
error = EACCES;
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
- p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_TASKGATED_OTHER, 0, 0);
+ p->p_pid, OS_REASON_EXEC, EXEC_EXIT_REASON_TASKGATED_OTHER, 0, 0);
signature_failure_reason = os_reason_create(OS_REASON_EXEC, EXEC_EXIT_REASON_TASKGATED_OTHER);
unexpected_failure = TRUE;
goto done;
/* Only do this if exec_resettextvp() did not fail */
if (p->p_textvp != NULLVP) {
- /*
- * If there's a new code directory, mark this process
- * as signed.
- */
- if (0 == ubc_cs_getcdhash(p->p_textvp, p->p_textoff, hash)) {
- proc_lock(p);
- p->p_csflags |= CS_VALID;
- proc_unlock(p);
+ csb = ubc_cs_blob_get(p->p_textvp, -1, p->p_textoff);
+
+ if (csb != NULL) {
+ /* As the enforcement we can do here is very limited, we only allow things that
+ * are the only reason why this code path still exists:
+ * Adhoc signed non-platform binaries without special cs_flags and without any
+ * entitlements (unrestricted ones still pass AMFI). */
+ if (
+ /* Revalidate the blob if necessary through bumped generation count. */
+ (ubc_cs_generation_check(p->p_textvp) == 0 ||
+ ubc_cs_blob_revalidate(p->p_textvp, csb, imgp, 0) == 0) &&
+ /* Only CS_ADHOC, no CS_KILL, CS_HARD etc. */
+ (csb->csb_flags & CS_ALLOWED_MACHO) == CS_ADHOC &&
+ /* If it has a CMS blob, it's not adhoc. The CS_ADHOC flag can lie. */
+ csblob_find_blob_bytes((const uint8_t *)csb->csb_mem_kaddr, csb->csb_mem_size,
+ CSSLOT_SIGNATURESLOT,
+ CSMAGIC_BLOBWRAPPER) == NULL &&
+ /* It could still be in a trust cache (unlikely with CS_ADHOC), or a magic path. */
+ csb->csb_platform_binary == 0 &&
+ /* No entitlements, not even unrestricted ones. */
+ csb->csb_entitlements_blob == NULL) {
+ proc_lock(p);
+ p->p_csflags |= CS_SIGNED | CS_VALID;
+ proc_unlock(p);
+ } else {
+ uint8_t cdhash[CS_CDHASH_LEN];
+ char cdhash_string[CS_CDHASH_STRING_SIZE];
+ proc_getcdhash(p, cdhash);
+ cdhash_to_string(cdhash_string, cdhash);
+ printf("ignoring detached code signature on '%s' with cdhash '%s' "
+ "because it is invalid, or not a simple adhoc signature.\n",
+ p->p_name, cdhash_string);
+ }
}
}
cdhash_to_string(cdhash_string, cdhash);
os_log(peLog, "CS Platform Exec Logging: Executing platform signed binary "
- "'%s' with cdhash %s\n", p->p_name, cdhash_string);
+ "'%s' with cdhash %s\n", p->p_name, cdhash_string);
}
} else {
- if (!unexpected_failure)
+ if (!unexpected_failure) {
p->p_csflags |= CS_KILLED;
+ }
/* make very sure execution fails */
if (vfexec || spawn) {
assert(signature_failure_reason != OS_REASON_NULL);
psignal_vfork_with_reason(p, p->task, imgp->ip_new_thread,
- SIGKILL, signature_failure_reason);
+ SIGKILL, signature_failure_reason);
signature_failure_reason = OS_REASON_NULL;
error = 0;
} else {
}
}
+ if (port != IPC_PORT_NULL) {
+ ipc_port_release_send(port);
+ }
+
/* If we hit this, we likely would have leaked an exit reason */
assert(signature_failure_reason == OS_REASON_NULL);
return error;
* in the process' page tables, we prefault some pages if
* possible. Errors are non-fatal.
*/
-static void exec_prefault_data(proc_t p __unused, struct image_params *imgp, load_result_t *load_result)
+static void
+exec_prefault_data(proc_t p __unused, struct image_params *imgp, load_result_t *load_result)
{
int ret;
size_t expected_all_image_infos_size;
* Prefault executable or dyld entry point.
*/
vm_fault(current_map(),
- vm_map_trunc_page(load_result->entry_point,
- vm_map_page_mask(current_map())),
- VM_PROT_READ | VM_PROT_EXECUTE,
- FALSE, VM_KERN_MEMORY_NONE,
- THREAD_UNINT, NULL, 0);
-
- if (imgp->ip_flags & IMGPF_IS_64BIT) {
+ vm_map_trunc_page(load_result->entry_point,
+ vm_map_page_mask(current_map())),
+ VM_PROT_READ | VM_PROT_EXECUTE,
+ FALSE, VM_KERN_MEMORY_NONE,
+ THREAD_UNINT, NULL, 0);
+
+ if (imgp->ip_flags & IMGPF_IS_64BIT_ADDR) {
expected_all_image_infos_size = sizeof(struct user64_dyld_all_image_infos);
} else {
expected_all_image_infos_size = sizeof(struct user32_dyld_all_image_infos);
/* Decode dyld anchor structure from <mach-o/dyld_images.h> */
if (load_result->dynlinker &&
- load_result->all_image_info_addr &&
- load_result->all_image_info_size >= expected_all_image_infos_size) {
+ load_result->all_image_info_addr &&
+ load_result->all_image_info_size >= expected_all_image_infos_size) {
union {
- struct user64_dyld_all_image_infos infos64;
- struct user32_dyld_all_image_infos infos32;
+ struct user64_dyld_all_image_infos infos64;
+ struct user32_dyld_all_image_infos infos32;
} all_image_infos;
/*
* and recovery path.
*/
vm_fault(current_map(),
- vm_map_trunc_page(load_result->all_image_info_addr,
- vm_map_page_mask(current_map())),
- VM_PROT_READ | VM_PROT_WRITE,
- FALSE, VM_KERN_MEMORY_NONE,
- THREAD_UNINT, NULL, 0);
+ vm_map_trunc_page(load_result->all_image_info_addr,
+ vm_map_page_mask(current_map())),
+ VM_PROT_READ | VM_PROT_WRITE,
+ FALSE, VM_KERN_MEMORY_NONE,
+ THREAD_UNINT, NULL, 0);
if ((load_result->all_image_info_addr & PAGE_MASK) + expected_all_image_infos_size > PAGE_SIZE) {
/* all_image_infos straddles a page */
vm_fault(current_map(),
- vm_map_trunc_page(load_result->all_image_info_addr + expected_all_image_infos_size - 1,
- vm_map_page_mask(current_map())),
- VM_PROT_READ | VM_PROT_WRITE,
- FALSE, VM_KERN_MEMORY_NONE,
- THREAD_UNINT, NULL, 0);
+ vm_map_trunc_page(load_result->all_image_info_addr + expected_all_image_infos_size - 1,
+ vm_map_page_mask(current_map())),
+ VM_PROT_READ | VM_PROT_WRITE,
+ FALSE, VM_KERN_MEMORY_NONE,
+ THREAD_UNINT, NULL, 0);
}
ret = copyin(load_result->all_image_info_addr,
- &all_image_infos,
- expected_all_image_infos_size);
+ &all_image_infos,
+ expected_all_image_infos_size);
if (ret == 0 && all_image_infos.infos32.version >= DYLD_ALL_IMAGE_INFOS_ADDRESS_MINIMUM_VERSION) {
-
user_addr_t notification_address;
user_addr_t dyld_image_address;
user_addr_t dyld_version_address;
user_addr_t dyld_all_image_infos_address;
user_addr_t dyld_slide_amount;
- if (imgp->ip_flags & IMGPF_IS_64BIT) {
+ if (imgp->ip_flags & IMGPF_IS_64BIT_ADDR) {
notification_address = all_image_infos.infos64.notification;
dyld_image_address = all_image_infos.infos64.dyldImageLoadAddress;
dyld_version_address = all_image_infos.infos64.dyldVersion;
#if 0
kprintf("exec_prefault: 0x%016llx 0x%08x 0x%016llx 0x%016llx 0x%016llx 0x%016llx\n",
- (uint64_t)load_result->all_image_info_addr,
- all_image_infos.infos32.version,
- (uint64_t)notification_address,
- (uint64_t)dyld_image_address,
- (uint64_t)dyld_version_address,
- (uint64_t)dyld_all_image_infos_address);
+ (uint64_t)load_result->all_image_info_addr,
+ all_image_infos.infos32.version,
+ (uint64_t)notification_address,
+ (uint64_t)dyld_image_address,
+ (uint64_t)dyld_version_address,
+ (uint64_t)dyld_all_image_infos_address);
#endif
vm_fault(current_map(),
- vm_map_trunc_page(notification_address + dyld_slide_amount,
- vm_map_page_mask(current_map())),
- VM_PROT_READ | VM_PROT_EXECUTE,
- FALSE, VM_KERN_MEMORY_NONE,
- THREAD_UNINT, NULL, 0);
+ vm_map_trunc_page(notification_address + dyld_slide_amount,
+ vm_map_page_mask(current_map())),
+ VM_PROT_READ | VM_PROT_EXECUTE,
+ FALSE, VM_KERN_MEMORY_NONE,
+ THREAD_UNINT, NULL, 0);
vm_fault(current_map(),
- vm_map_trunc_page(dyld_image_address + dyld_slide_amount,
- vm_map_page_mask(current_map())),
- VM_PROT_READ | VM_PROT_EXECUTE,
- FALSE, VM_KERN_MEMORY_NONE,
- THREAD_UNINT, NULL, 0);
+ vm_map_trunc_page(dyld_image_address + dyld_slide_amount,
+ vm_map_page_mask(current_map())),
+ VM_PROT_READ | VM_PROT_EXECUTE,
+ FALSE, VM_KERN_MEMORY_NONE,
+ THREAD_UNINT, NULL, 0);
vm_fault(current_map(),
- vm_map_trunc_page(dyld_version_address + dyld_slide_amount,
- vm_map_page_mask(current_map())),
- VM_PROT_READ,
- FALSE, VM_KERN_MEMORY_NONE,
- THREAD_UNINT, NULL, 0);
+ vm_map_trunc_page(dyld_version_address + dyld_slide_amount,
+ vm_map_page_mask(current_map())),
+ VM_PROT_READ,
+ FALSE, VM_KERN_MEMORY_NONE,
+ THREAD_UNINT, NULL, 0);
vm_fault(current_map(),
- vm_map_trunc_page(dyld_all_image_infos_address + dyld_slide_amount,
- vm_map_page_mask(current_map())),
- VM_PROT_READ | VM_PROT_WRITE,
- FALSE, VM_KERN_MEMORY_NONE,
- THREAD_UNINT, NULL, 0);
+ vm_map_trunc_page(dyld_all_image_infos_address + dyld_slide_amount,
+ vm_map_page_mask(current_map())),
+ VM_PROT_READ | VM_PROT_WRITE,
+ FALSE, VM_KERN_MEMORY_NONE,
+ THREAD_UNINT, NULL, 0);
}
}
}
projects / apple / xnu.git / blobdiff