* Copyright (c) 2000-2006 Apple Computer, 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) 1991 NeXT Computer, Inc. All rights reserved.
#include <vm/vm_kern.h>
#include <vm/vm_protos.h> /* last */
-#include <vm/vm_map.h> /* current_map() */
-#include <mach/mach_vm.h> /* mach_vm_region_recurse() */
-#include <mach/task.h> /* task_suspend() */
-#include <kern/task.h> /* get_task_numacts() */
+#include <vm/vm_map.h> /* current_map() */
+#include <mach/mach_vm.h> /* mach_vm_region_recurse() */
+#include <mach/task.h> /* task_suspend() */
+#include <kern/task.h> /* get_task_numacts() */
#include <security/audit/audit.h>
-#if CONFIG_CSR
-#include <sys/codesign.h>
-#include <sys/csr.h>
-#endif
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif /* CONFIG_MACF */
typedef struct {
- int flavor; /* the number for this flavor */
- mach_msg_type_number_t count; /* count of ints in this flavor */
+ int flavor; /* the number for this flavor */
+ mach_msg_type_number_t count; /* count of ints in this flavor */
} mythread_state_flavor_t;
#if defined (__i386__) || defined (__x86_64__)
-mythread_state_flavor_t thread_flavor_array [] = {
- {x86_THREAD_STATE, x86_THREAD_STATE_COUNT},
- {x86_FLOAT_STATE, x86_FLOAT_STATE_COUNT},
- {x86_EXCEPTION_STATE, x86_EXCEPTION_STATE_COUNT},
- };
-int mynum_flavors=3;
+mythread_state_flavor_t thread_flavor_array[] = {
+ {x86_THREAD_STATE, x86_THREAD_STATE_COUNT},
+ {x86_FLOAT_STATE, x86_FLOAT_STATE_COUNT},
+ {x86_EXCEPTION_STATE, x86_EXCEPTION_STATE_COUNT},
+};
+int mynum_flavors = 3;
#elif defined (__arm__)
-mythread_state_flavor_t thread_flavor_array[]={
- {ARM_THREAD_STATE , ARM_THREAD_STATE_COUNT},
- {ARM_VFP_STATE, ARM_VFP_STATE_COUNT},
- {ARM_EXCEPTION_STATE, ARM_EXCEPTION_STATE_COUNT}
- };
-int mynum_flavors=3;
+mythread_state_flavor_t thread_flavor_array[] = {
+ {ARM_THREAD_STATE, ARM_THREAD_STATE_COUNT},
+ {ARM_VFP_STATE, ARM_VFP_STATE_COUNT},
+ {ARM_EXCEPTION_STATE, ARM_EXCEPTION_STATE_COUNT}
+};
+int mynum_flavors = 3;
#elif defined (__arm64__)
-mythread_state_flavor_t thread_flavor_array[]={
- {ARM_THREAD_STATE64 , ARM_THREAD_STATE64_COUNT},
- /* ARM64_TODO: VFP */
- {ARM_EXCEPTION_STATE64, ARM_EXCEPTION_STATE64_COUNT}
- };
-int mynum_flavors=2;
+mythread_state_flavor_t thread_flavor_array[] = {
+ {ARM_THREAD_STATE64, ARM_THREAD_STATE64_COUNT},
+ /* ARM64_TODO: VFP */
+ {ARM_EXCEPTION_STATE64, ARM_EXCEPTION_STATE64_COUNT}
+};
+int mynum_flavors = 2;
#else
#error architecture not supported
#endif
typedef struct {
- vm_offset_t header;
- int hoffset;
+ vm_offset_t header;
+ size_t hoffset;
mythread_state_flavor_t *flavors;
- int tstate_size;
- int flavor_count;
+ size_t tstate_size;
+ size_t flavor_count;
} tir_t;
extern int freespace_mb(vnode_t vp);
/* XXX not in a Mach header anywhere */
kern_return_t thread_getstatus(thread_t act, int flavor,
- thread_state_t tstate, mach_msg_type_number_t *count);
-void task_act_iterate_wth_args(task_t, void(*)(thread_t, void *), void *);
+ thread_state_t tstate, mach_msg_type_number_t *count);
+void task_act_iterate_wth_args(task_t, void (*)(thread_t, void *), void *);
#ifdef SECURE_KERNEL
-__XNU_PRIVATE_EXTERN int do_coredump = 0; /* default: don't dump cores */
+__XNU_PRIVATE_EXTERN int do_coredump = 0; /* default: don't dump cores */
#else
-__XNU_PRIVATE_EXTERN int do_coredump = 1; /* default: dump cores */
+__XNU_PRIVATE_EXTERN int do_coredump = 1; /* default: dump cores */
#endif
__XNU_PRIVATE_EXTERN int sugid_coredump = 0; /* default: but not SGUID binaries */
{
cpu_type_t what_we_think;
#if defined (__i386__) || defined (__x86_64__)
- if (IS_64BIT_PROCESS(core_proc)) {
+ if (IS_64BIT_PROCESS(core_proc)) {
what_we_think = CPU_TYPE_X86_64;
} else {
what_we_think = CPU_TYPE_I386;
what_we_think = CPU_TYPE_ARM;
}
#endif
+
return what_we_think;
}
{
cpu_type_t what_we_think;
#if defined (__i386__) || defined (__x86_64__)
- if (IS_64BIT_PROCESS(core_proc)) {
+ if (IS_64BIT_PROCESS(core_proc)) {
what_we_think = CPU_SUBTYPE_X86_64_ALL;
} else {
what_we_think = CPU_SUBTYPE_I386_ALL;
}
#elif defined (__arm__) || defined(__arm64__)
- if (IS_64BIT_PROCESS(core_proc)) {
+ if (IS_64BIT_PROCESS(core_proc)) {
what_we_think = CPU_SUBTYPE_ARM64_ALL;
} else {
what_we_think = CPU_SUBTYPE_ARM_ALL;
static void
collectth_state(thread_t th_act, void *tirp)
{
- vm_offset_t header;
- int hoffset, i ;
+ vm_offset_t header;
+ size_t hoffset, i;
mythread_state_flavor_t *flavors;
- struct thread_command *tc;
+ struct thread_command *tc;
tir_t *t = (tir_t *)tirp;
- /*
- * Fill in thread command structure.
- */
- header = t->header;
- hoffset = t->hoffset;
- flavors = t->flavors;
-
- tc = (struct thread_command *) (header + hoffset);
- tc->cmd = LC_THREAD;
- tc->cmdsize = sizeof(struct thread_command)
- + t->tstate_size;
- hoffset += sizeof(struct thread_command);
- /*
- * Follow with a struct thread_state_flavor and
- * the appropriate thread state struct for each
- * thread state flavor.
- */
- for (i = 0; i < t->flavor_count; i++) {
- *(mythread_state_flavor_t *)(header+hoffset) =
- flavors[i];
- hoffset += sizeof(mythread_state_flavor_t);
- thread_getstatus(th_act, flavors[i].flavor,
- (thread_state_t)(header+hoffset),
- &flavors[i].count);
- hoffset += flavors[i].count*sizeof(int);
- }
+ /*
+ * Fill in thread command structure.
+ */
+ header = t->header;
+ hoffset = t->hoffset;
+ flavors = t->flavors;
+
+ tc = (struct thread_command *) (header + hoffset);
+ tc->cmd = LC_THREAD;
+ tc->cmdsize = (uint32_t)(sizeof(struct thread_command)
+ + t->tstate_size);
+ hoffset += sizeof(struct thread_command);
+ /*
+ * Follow with a struct thread_state_flavor and
+ * the appropriate thread state struct for each
+ * thread state flavor.
+ */
+ for (i = 0; i < t->flavor_count; i++) {
+ *(mythread_state_flavor_t *)(header + hoffset) =
+ flavors[i];
+ hoffset += sizeof(mythread_state_flavor_t);
+ thread_getstatus(th_act, flavors[i].flavor,
+ (thread_state_t)(header + hoffset),
+ &flavors[i].count);
+ hoffset += flavors[i].count * sizeof(int);
+ }
- t->hoffset = hoffset;
+ t->hoffset = hoffset;
}
/*
* coredump_flags Extra options (ignore rlimit, run fsync)
*
* Returns: 0 Success
- * EFAULT Failed
+ * !0 Failure errno
*
* IMPORTANT: This function can only be called on the current process, due
* to assumptions below; see variable declaration section for
* details.
*/
-#define MAX_TSTATE_FLAVORS 10
+#define MAX_TSTATE_FLAVORS 10
int
coredump(proc_t core_proc, uint32_t reserve_mb, int coredump_flags)
{
/* Begin assumptions that limit us to only the current process */
vfs_context_t ctx = vfs_context_current();
- vm_map_t map = current_map();
- task_t task = current_task();
+ vm_map_t map = current_map();
+ task_t task = current_task();
/* End assumptions */
kauth_cred_t cred = vfs_context_ucred(ctx);
int error = 0;
struct vnode_attr va;
- int thread_count, segment_count;
- int command_size, header_size, tstate_size;
- int hoffset;
- off_t foffset;
+ size_t thread_count, segment_count;
+ size_t command_size, header_size, tstate_size;
+ size_t hoffset;
+ off_t foffset;
mach_vm_offset_t vmoffset;
- vm_offset_t header;
- mach_vm_size_t vmsize;
- vm_prot_t prot;
- vm_prot_t maxprot;
- vm_inherit_t inherit;
- int error1 = 0;
- char stack_name[MAXCOMLEN+6];
- char *alloced_name = NULL;
- char *name;
+ vm_offset_t header;
+ mach_vm_size_t vmsize;
+ vm_prot_t prot;
+ vm_prot_t maxprot;
+ vm_inherit_t inherit;
+ int error1 = 0;
+ char stack_name[MAXCOMLEN + 6];
+ char *alloced_name = NULL;
+ char *name = NULL;
mythread_state_flavor_t flavors[MAX_TSTATE_FLAVORS];
- vm_size_t mapsize;
- int i;
+ vm_size_t mapsize;
+ size_t i;
uint32_t nesting_depth = 0;
- kern_return_t kret;
+ kern_return_t kret;
struct vm_region_submap_info_64 vbr;
mach_msg_type_number_t vbrcount = 0;
tir_t tir1;
struct vnode * vp;
- struct mach_header *mh = NULL; /* protected by is_64 */
- struct mach_header_64 *mh64 = NULL; /* protected by is_64 */
- int is_64 = 0;
- size_t mach_header_sz = sizeof(struct mach_header);
- size_t segment_command_sz = sizeof(struct segment_command);
-
+ struct mach_header *mh = NULL; /* protected by is_64 */
+ struct mach_header_64 *mh64 = NULL; /* protected by is_64 */
+ int is_64 = 0;
+ size_t mach_header_sz = sizeof(struct mach_header);
+ size_t segment_command_sz = sizeof(struct segment_command);
+
if (current_proc() != core_proc) {
panic("coredump() called against proc that is not current_proc: %p", core_proc);
}
- if (do_coredump == 0 || /* Not dumping at all */
- ( (sugid_coredump == 0) && /* Not dumping SUID/SGID binaries */
- ( (kauth_cred_getsvuid(cred) != kauth_cred_getruid(cred)) ||
- (kauth_cred_getsvgid(cred) != kauth_cred_getrgid(cred))))) {
-
-#if CONFIG_AUDIT
- audit_proc_coredump(core_proc, NULL, EFAULT);
-#endif
- return (EFAULT);
+ if (do_coredump == 0 || /* Not dumping at all */
+ ((sugid_coredump == 0) && /* Not dumping SUID/SGID binaries */
+ ((kauth_cred_getsvuid(cred) != kauth_cred_getruid(cred)) ||
+ (kauth_cred_getsvgid(cred) != kauth_cred_getrgid(cred))))) {
+ error = EFAULT;
+ goto out2;
}
-#if CONFIG_CSR
- /* If the process is restricted, CSR isn't configured to allow
- * restricted processes to be debugged, and CSR isn't configured in
- * AppleInternal mode, then don't dump core. */
- if (cs_restricted(core_proc) &&
- csr_check(CSR_ALLOW_TASK_FOR_PID) &&
- csr_check(CSR_ALLOW_APPLE_INTERNAL)) {
-#if CONFIG_AUDIT
- audit_proc_coredump(core_proc, NULL, EFAULT);
-#endif
- return (EFAULT);
+#if CONFIG_MACF
+ error = mac_proc_check_dump_core(core_proc);
+ if (error != 0) {
+ goto out2;
}
#endif
mapsize = get_vmmap_size(map);
if (((coredump_flags & COREDUMP_IGNORE_ULIMIT) == 0) &&
- (mapsize >= core_proc->p_rlimit[RLIMIT_CORE].rlim_cur))
- return (EFAULT);
+ (mapsize >= proc_limitgetcur(core_proc, RLIMIT_CORE, FALSE))) {
+ error = EFAULT;
+ goto out2;
+ }
(void) task_suspend_internal(task);
/* if name creation fails, fall back to historical behaviour... */
if (alloced_name == NULL ||
proc_core_name(core_proc->p_comm, kauth_cred_getuid(cred),
- core_proc->p_pid, alloced_name, MAXPATHLEN)) {
+ core_proc->p_pid, alloced_name, MAXPATHLEN)) {
snprintf(stack_name, sizeof(stack_name),
- "/cores/core.%d", core_proc->p_pid);
+ "/cores/core.%d", core_proc->p_pid);
name = stack_name;
- } else
+ } else {
name = alloced_name;
+ }
- if ((error = vnode_open(name, (O_CREAT | FWRITE | O_NOFOLLOW), S_IRUSR, VNODE_LOOKUP_NOFOLLOW, &vp, ctx)))
+ if ((error = vnode_open(name, (O_CREAT | FWRITE | O_NOFOLLOW), S_IRUSR, VNODE_LOOKUP_NOFOLLOW, &vp, ctx))) {
goto out2;
+ }
VATTR_INIT(&va);
VATTR_WANTED(&va, va_nlink);
goto out;
}
- VATTR_INIT(&va); /* better to do it here than waste more stack in vnode_setsize */
+ VATTR_INIT(&va); /* better to do it here than waste more stack in vnode_setsize */
VATTR_SET(&va, va_data_size, 0);
if (core_proc == initproc) {
VATTR_SET(&va, va_dataprotect_class, PROTECTION_CLASS_D);
*/
thread_count = get_task_numacts(task);
- segment_count = get_vmmap_entries(map); /* XXX */
- tir1.flavor_count = sizeof(thread_flavor_array)/sizeof(mythread_state_flavor_t);
- bcopy(thread_flavor_array, flavors,sizeof(thread_flavor_array));
+ segment_count = get_vmmap_entries(map); /* XXX */
+ tir1.flavor_count = sizeof(thread_flavor_array) / sizeof(mythread_state_flavor_t);
+ bcopy(thread_flavor_array, flavors, sizeof(thread_flavor_array));
tstate_size = 0;
- for (i = 0; i < tir1.flavor_count; i++)
+ for (i = 0; i < tir1.flavor_count; i++) {
tstate_size += sizeof(mythread_state_flavor_t) +
- (flavors[i].count * sizeof(int));
- command_size = segment_count * segment_command_sz +
- thread_count*sizeof(struct thread_command) +
- tstate_size*thread_count;
+ (flavors[i].count * sizeof(int));
+ }
+
+ {
+ size_t lhs;
+ size_t rhs;
+
+ /* lhs = segment_count * segment_command_sz */
+ if (os_mul_overflow(segment_count, segment_command_sz, &lhs)) {
+ error = ENOMEM;
+ goto out;
+ }
+
+ /* rhs = (tstate_size + sizeof(struct thread_command)) * thread_count */
+ if (os_add_and_mul_overflow(tstate_size, sizeof(struct thread_command), thread_count, &rhs)) {
+ error = ENOMEM;
+ goto out;
+ }
+
+ /* command_size = lhs + rhs */
+ if (os_add_overflow(lhs, rhs, &command_size)) {
+ error = ENOMEM;
+ goto out;
+ }
+ }
- header_size = command_size + mach_header_sz;
+ if (os_add_overflow(command_size, mach_header_sz, &header_size)) {
+ error = ENOMEM;
+ goto out;
+ }
if (kmem_alloc(kernel_map, &header, (vm_size_t)header_size, VM_KERN_MEMORY_DIAG) != KERN_SUCCESS) {
error = ENOMEM;
mh64->cputype = process_cpu_type(core_proc);
mh64->cpusubtype = process_cpu_subtype(core_proc);
mh64->filetype = MH_CORE;
- mh64->ncmds = segment_count + thread_count;
- mh64->sizeofcmds = command_size;
- mh64->reserved = 0; /* 8 byte alignment */
+ mh64->ncmds = (uint32_t)(segment_count + thread_count);
+ mh64->sizeofcmds = (uint32_t)command_size;
+ mh64->reserved = 0; /* 8 byte alignment */
} else {
mh = (struct mach_header *)header;
mh->magic = MH_MAGIC;
mh->cputype = process_cpu_type(core_proc);
mh->cpusubtype = process_cpu_subtype(core_proc);
mh->filetype = MH_CORE;
- mh->ncmds = segment_count + thread_count;
- mh->sizeofcmds = command_size;
+ mh->ncmds = (uint32_t)(segment_count + thread_count);
+ mh->sizeofcmds = (uint32_t)command_size;
}
- hoffset = mach_header_sz; /* offset into header */
- foffset = round_page(header_size); /* offset into file */
- vmoffset = MACH_VM_MIN_ADDRESS; /* offset into VM */
+ hoffset = mach_header_sz; /* offset into header */
+ foffset = round_page(header_size); /* offset into file */
+ vmoffset = MACH_VM_MIN_ADDRESS; /* offset into VM */
/*
- * We use to check for an error, here, now we try and get
+ * We use to check for an error, here, now we try and get
* as much as we can
*/
while (segment_count > 0) {
- struct segment_command *sc;
- struct segment_command_64 *sc64;
+ struct segment_command *sc;
+ struct segment_command_64 *sc64;
/*
* Get region information for next region.
*/
-
+
while (1) {
vbrcount = VM_REGION_SUBMAP_INFO_COUNT_64;
- if((kret = mach_vm_region_recurse(map,
- &vmoffset, &vmsize, &nesting_depth,
- (vm_region_recurse_info_t)&vbr,
- &vbrcount)) != KERN_SUCCESS) {
+ if ((kret = mach_vm_region_recurse(map,
+ &vmoffset, &vmsize, &nesting_depth,
+ (vm_region_recurse_info_t)&vbr,
+ &vbrcount)) != KERN_SUCCESS) {
break;
}
/*
*/
if (!(is_64) &&
(vmoffset + vmsize > VM_MAX_ADDRESS)) {
- kret = KERN_INVALID_ADDRESS;
+ kret = KERN_INVALID_ADDRESS;
break;
}
- if(vbr.is_submap) {
+ if (vbr.is_submap) {
nesting_depth++;
continue;
} else {
break;
}
}
- if(kret != KERN_SUCCESS)
+ if (kret != KERN_SUCCESS) {
break;
+ }
prot = vbr.protection;
maxprot = vbr.max_protection;
sc64->initprot = prot;
sc64->nsects = 0;
sc64->flags = 0;
- } else {
+ } else {
sc = (struct segment_command *) (header + hoffset);
sc->cmd = LC_SEGMENT;
sc->cmdsize = sizeof(struct segment_command);
/* segment name is zeroed by kmem_alloc */
sc->segname[0] = 0;
- sc->vmaddr = CAST_DOWN_EXPLICIT(vm_offset_t,vmoffset);
- sc->vmsize = CAST_DOWN_EXPLICIT(vm_size_t,vmsize);
- sc->fileoff = CAST_DOWN_EXPLICIT(uint32_t,foffset); /* will never truncate */
- sc->filesize = CAST_DOWN_EXPLICIT(uint32_t,vmsize); /* will never truncate */
+ sc->vmaddr = CAST_DOWN_EXPLICIT(uint32_t, vmoffset);
+ sc->vmsize = CAST_DOWN_EXPLICIT(uint32_t, vmsize);
+ sc->fileoff = CAST_DOWN_EXPLICIT(uint32_t, foffset); /* will never truncate */
+ sc->filesize = CAST_DOWN_EXPLICIT(uint32_t, vmsize); /* will never truncate */
sc->maxprot = maxprot;
sc->initprot = prot;
sc->nsects = 0;
*/
if ((prot & VM_PROT_READ) == 0) {
mach_vm_protect(map, vmoffset, vmsize, FALSE,
- prot|VM_PROT_READ);
+ prot | VM_PROT_READ);
}
/*
* Only actually perform write if we can read.
* a hole in the file.
*/
if ((maxprot & VM_PROT_READ) == VM_PROT_READ
- && vbr.user_tag != VM_MEMORY_IOKIT
- && coredumpok(map,vmoffset)) {
-
+ && vbr.user_tag != VM_MEMORY_IOKIT
+ && coredumpok(map, vmoffset)) {
error = vn_rdwr_64(UIO_WRITE, vp, vmoffset, vmsize, foffset,
- (IS_64BIT_PROCESS(core_proc) ? UIO_USERSPACE64 : UIO_USERSPACE32),
- IO_NOCACHE|IO_NODELOCKED|IO_UNIT, cred, (int64_t *) 0, core_proc);
-
+ (IS_64BIT_PROCESS(core_proc) ? UIO_USERSPACE64 : UIO_USERSPACE32),
+ IO_NOCACHE | IO_NODELOCKED | IO_UNIT, cred, (int64_t *) 0, core_proc);
}
hoffset += segment_command_sz;
tir1.hoffset = hoffset;
tir1.flavors = flavors;
tir1.tstate_size = tstate_size;
- task_act_iterate_wth_args(task, collectth_state,&tir1);
+ task_act_iterate_wth_args(task, collectth_state, &tir1);
/*
* Write out the Mach header at the beginning of the
* file. OK to use a 32 bit write for this.
*/
- error = vn_rdwr(UIO_WRITE, vp, (caddr_t)header, header_size, (off_t)0,
- UIO_SYSSPACE, IO_NOCACHE|IO_NODELOCKED|IO_UNIT, cred, (int *) 0, core_proc);
+ error = vn_rdwr(UIO_WRITE, vp, (caddr_t)header, (int)MIN(header_size, INT_MAX), (off_t)0,
+ UIO_SYSSPACE, IO_NOCACHE | IO_NODELOCKED | IO_UNIT, cred, (int *) 0, core_proc);
kmem_free(kernel_map, header, header_size);
- if ((coredump_flags & COREDUMP_FULLFSYNC) && error == 0)
+ if ((coredump_flags & COREDUMP_FULLFSYNC) && error == 0) {
error = VNOP_IOCTL(vp, F_FULLFSYNC, (caddr_t)NULL, 0, ctx);
+ }
out:
error1 = vnode_close(vp, FWRITE, ctx);
out2:
#if CONFIG_AUDIT
audit_proc_coredump(core_proc, name, error);
#endif
- if (alloced_name != NULL)
+ if (alloced_name != NULL) {
FREE(alloced_name, M_TEMP);
- if (error == 0)
+ }
+ if (error == 0) {
error = error1;
+ }
- return (error);
+ return error;
}
#else /* CONFIG_COREDUMP */
projects / apple / xnu.git / blobdiff