/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
+ * Copyright (c) 2007 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
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * 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.
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1988 University of Utah.
*
* @(#)vm_mmap.c 8.10 (Berkeley) 2/19/95
*/
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
/*
* Mapped file (mmap) interface to VM
#include <sys/conf.h>
#include <sys/stat.h>
#include <sys/ubc.h>
+#include <sys/ubc_internal.h>
#include <sys/sysproto.h>
+#if CONFIG_PROTECT
+#include <sys/cprotect.h>
+#endif
-#include <bsm/audit_kernel.h>
+#include <sys/syscall.h>
+#include <sys/kdebug.h>
+
+#include <security/audit/audit.h>
#include <bsm/audit_kevents.h>
#include <mach/mach_types.h>
#include <mach/vm_map.h>
#include <mach/host_priv.h>
+#include <machine/machine_routines.h>
+
#include <kern/cpu_number.h>
#include <kern/host.h>
+#include <kern/task.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_pager.h>
+#include <vm/vm_protos.h>
-int
-sbrk(__unused struct proc *p, __unused struct sbrk_args *uap, __unused register_t *retval)
-{
- /* Not yet implemented */
- return (ENOTSUP);
-}
-
-int
-sstk(__unused struct proc *p, __unused struct sstk_args *uap, __unused register_t *retval)
-{
- /* Not yet implemented */
- return (ENOTSUP);
-}
-
-
-struct osmmap_args {
- caddr_t addr;
- int len;
- int prot;
- int share;
- int fd;
- long pos;
-};
-
-int
-osmmap(
- struct proc *curp,
- register struct osmmap_args *uap,
- register_t *retval)
-{
- struct mmap_args newargs;
- user_addr_t addr;
- int ret;
-
- if ((uap->share == MAP_SHARED )|| (uap->share == MAP_PRIVATE )) {
- newargs.addr = CAST_USER_ADDR_T(uap->addr);
- newargs.len = CAST_USER_ADDR_T(uap->len);
- newargs.prot = uap->prot;
- newargs.flags = uap->share;
- newargs.fd = uap->fd;
- newargs.pos = (off_t)uap->pos;
- ret = mmap(curp, &newargs, &addr);
- if (ret == 0)
- *retval = CAST_DOWN(register_t, addr);
- } else
- ret = EINVAL;
- return ret;
-}
-
+/* XXX the following function should probably be static */
+kern_return_t map_fd_funneled(int, vm_object_offset_t, vm_offset_t *,
+ boolean_t, vm_size_t);
+/*
+ * XXX Internally, we use VM_PROT_* somewhat interchangeably, but the correct
+ * XXX usage is PROT_* from an interface perspective. Thus the values of
+ * XXX VM_PROT_* and PROT_* need to correspond.
+ */
int
-mmap(struct proc *p, struct mmap_args *uap, user_addr_t *retval)
+mmap(proc_t p, struct mmap_args *uap, user_addr_t *retval)
{
/*
* Map in special device (must be SHARED) or file
int err=0;
vm_map_t user_map;
kern_return_t result;
- mach_vm_offset_t user_addr;
- mach_vm_size_t user_size;
+ vm_map_offset_t user_addr;
+ vm_map_size_t user_size;
vm_object_offset_t pageoff;
vm_object_offset_t file_pos;
- int alloc_flags;
+ int alloc_flags=0;
boolean_t docow;
vm_prot_t maxprot;
void *handle;
- vm_pager_t pager;
+ memory_object_t pager = MEMORY_OBJECT_NULL;
+ memory_object_control_t control;
int mapanon=0;
int fpref=0;
int error =0;
int fd = uap->fd;
+ int num_retries = 0;
- user_addr = (mach_vm_offset_t)uap->addr;
- user_size = (mach_vm_size_t) uap->len;
+ user_map = current_map();
+ user_addr = (vm_map_offset_t)uap->addr;
+ user_size = (vm_map_size_t) uap->len;
AUDIT_ARG(addr, user_addr);
AUDIT_ARG(len, user_size);
AUDIT_ARG(fd, uap->fd);
prot = (uap->prot & VM_PROT_ALL);
+#if 3777787
+ /*
+ * Since the hardware currently does not support writing without
+ * read-before-write, or execution-without-read, if the request is
+ * for write or execute access, we must imply read access as well;
+ * otherwise programs expecting this to work will fail to operate.
+ */
+ if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
+ prot |= VM_PROT_READ;
+#endif /* radar 3777787 */
+
flags = uap->flags;
vp = NULLVP;
/* make sure mapping fits into numeric range etc */
- if ((file_pos + user_size > (vm_object_offset_t)-PAGE_SIZE_64) ||
- ((flags & MAP_ANON) && fd != -1))
+ if (file_pos + user_size > (vm_object_offset_t)-PAGE_SIZE_64)
return (EINVAL);
/*
* Align the file position to a page boundary,
* and save its page offset component.
*/
- pageoff = (file_pos & PAGE_MASK);
+ pageoff = (file_pos & vm_map_page_mask(user_map));
file_pos -= (vm_object_offset_t)pageoff;
/* Adjust size for rounding (on both ends). */
- user_size += pageoff; /* low end... */
- user_size = mach_vm_round_page(user_size); /* hi end */
-
+ user_size += pageoff; /* low end... */
+ user_size = vm_map_round_page(user_size,
+ vm_map_page_mask(user_map)); /* hi end */
+ if ((flags & MAP_JIT) && ((flags & MAP_FIXED) || (flags & MAP_SHARED) || !(flags & MAP_ANON))){
+ return EINVAL;
+ }
/*
* Check for illegal addresses. Watch out for address wrap... Note
* that VM_*_ADDRESS are not constants due to casts (argh).
* should be aligned after adjustment by pageoff.
*/
user_addr -= pageoff;
- if (user_addr & PAGE_MASK)
+ if (user_addr & vm_map_page_mask(user_map))
return (EINVAL);
}
#ifdef notyet
* There should really be a pmap call to determine a reasonable
* location.
*/
- else if (addr < mach_vm_round_page(p->p_vmspace->vm_daddr + MAXDSIZ))
- addr = mach_vm_round_page(p->p_vmspace->vm_daddr + MAXDSIZ);
+ else if (addr < vm_map_round_page(p->p_vmspace->vm_daddr + MAXDSIZ,
+ vm_map_page_mask(user_map)))
+ addr = vm_map_round_page(p->p_vmspace->vm_daddr + MAXDSIZ,
+ vm_map_page_mask(user_map));
#endif
+ alloc_flags = 0;
if (flags & MAP_ANON) {
+
+ maxprot = VM_PROT_ALL;
+#if CONFIG_MACF
/*
- * Mapping blank space is trivial.
+ * Entitlement check.
*/
+ error = mac_proc_check_map_anon(p, user_addr, user_size, prot, flags, &maxprot);
+ if (error) {
+ return EINVAL;
+ }
+#endif /* MAC */
+
+ /*
+ * Mapping blank space is trivial. Use positive fds as the alias
+ * value for memory tracking.
+ */
+ if (fd != -1) {
+ /*
+ * Use "fd" to pass (some) Mach VM allocation flags,
+ * (see the VM_FLAGS_* definitions).
+ */
+ alloc_flags = fd & (VM_FLAGS_ALIAS_MASK | VM_FLAGS_SUPERPAGE_MASK |
+ VM_FLAGS_PURGABLE);
+ if (alloc_flags != fd) {
+ /* reject if there are any extra flags */
+ return EINVAL;
+ }
+ }
+
handle = NULL;
- maxprot = VM_PROT_ALL;
file_pos = 0;
mapanon = 1;
} else {
struct vnode_attr va;
- struct vfs_context context;
+ vfs_context_t ctx = vfs_context_current();
+
+ if (flags & MAP_JIT)
+ return EINVAL;
+
/*
* Mapping file, get fp for validation. Obtain vnode and make
* sure it is of appropriate type.
if (err)
return(err);
fpref = 1;
- if(fp->f_fglob->fg_type == DTYPE_PSXSHM) {
+ switch (FILEGLOB_DTYPE(fp->f_fglob)) {
+ case DTYPE_PSXSHM:
uap->addr = (user_addr_t)user_addr;
uap->len = (user_size_t)user_size;
uap->prot = prot;
uap->pos = file_pos;
error = pshm_mmap(p, uap, retval, fp, (off_t)pageoff);
goto bad;
- }
-
- if (fp->f_fglob->fg_type != DTYPE_VNODE) {
+ case DTYPE_VNODE:
+ break;
+ default:
error = EINVAL;
goto bad;
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
- /* conformance change - mmap needs to update access time for mapped
- * files
+ /*
+ * POSIX: mmap needs to update access time for mapped files
*/
- VATTR_INIT(&va);
- nanotime(&va.va_access_time);
- VATTR_SET_ACTIVE(&va, va_access_time);
- context.vc_proc = p;
- context.vc_ucred = kauth_cred_get();
- vnode_setattr(vp, &va, &context);
+ if ((vnode_vfsvisflags(vp) & MNT_NOATIME) == 0) {
+ VATTR_INIT(&va);
+ nanotime(&va.va_access_time);
+ VATTR_SET_ACTIVE(&va, va_access_time);
+ vnode_setattr(vp, &va, ctx);
+ }
/*
* XXX hack to handle use of /dev/zero to map anon memory (ala
*/
if ((flags & MAP_SHARED) != 0) {
- if ((fp->f_fglob->fg_flag & FWRITE) != 0) {
+ if ((fp->f_fglob->fg_flag & FWRITE) != 0 &&
+ /*
+ * Do not allow writable mappings of
+ * swap files (see vm_swapfile_pager.c).
+ */
+ !vnode_isswap(vp)) {
/*
* check for write access
*
* Note that we already made this check when granting FWRITE
* against the file, so it seems redundant here.
*/
- error = vnode_authorize(vp, NULL, KAUTH_VNODE_CHECKIMMUTABLE, &context);
+ error = vnode_authorize(vp, NULL, KAUTH_VNODE_CHECKIMMUTABLE, ctx);
/* if not granted for any reason, but we wanted it, bad */
if ((prot & PROT_WRITE) && (error != 0)) {
maxprot |= VM_PROT_WRITE;
handle = (void *)vp;
+#if CONFIG_MACF
+ error = mac_file_check_mmap(vfs_context_ucred(ctx),
+ fp->f_fglob, prot, flags, &maxprot);
+ if (error) {
+ (void)vnode_put(vp);
+ goto bad;
+ }
+#endif /* MAC */
+
+#if CONFIG_PROTECT
+ {
+ error = cp_handle_vnop(vp, CP_READ_ACCESS | CP_WRITE_ACCESS, 0);
+ if (error) {
+ (void) vnode_put(vp);
+ goto bad;
+ }
+ }
+#endif /* CONFIG_PROTECT */
+
+
}
}
* We bend a little - round the start and end addresses
* to the nearest page boundary.
*/
- user_size = mach_vm_round_page(user_size);
+ user_size = vm_map_round_page(user_size,
+ vm_map_page_mask(user_map));
- if (file_pos & PAGE_MASK_64) {
+ if (file_pos & vm_map_page_mask(user_map)) {
if (!mapanon)
(void)vnode_put(vp);
error = EINVAL;
goto bad;
}
- user_map = current_map();
-
if ((flags & MAP_FIXED) == 0) {
- alloc_flags = VM_FLAGS_ANYWHERE;
- user_addr = mach_vm_round_page(user_addr);
+ alloc_flags |= VM_FLAGS_ANYWHERE;
+ user_addr = vm_map_round_page(user_addr,
+ vm_map_page_mask(user_map));
} else {
- if (user_addr != mach_vm_trunc_page(user_addr)) {
+ if (user_addr != vm_map_trunc_page(user_addr,
+ vm_map_page_mask(user_map))) {
if (!mapanon)
(void)vnode_put(vp);
error = EINVAL;
* has to deallocate the existing mappings and establish the
* new ones atomically.
*/
- alloc_flags = VM_FLAGS_FIXED | VM_FLAGS_OVERWRITE;
+ alloc_flags |= VM_FLAGS_FIXED | VM_FLAGS_OVERWRITE;
}
+ if (flags & MAP_NOCACHE)
+ alloc_flags |= VM_FLAGS_NO_CACHE;
+ if (flags & MAP_JIT){
+ alloc_flags |= VM_FLAGS_MAP_JIT;
+ }
/*
* Lookup/allocate object.
*/
if (handle == NULL) {
- pager = NULL;
+ control = NULL;
#ifdef notyet
/* Hmm .. */
#if defined(VM_PROT_READ_IS_EXEC)
if (prot & VM_PROT_READ)
prot |= VM_PROT_EXECUTE;
-
if (maxprot & VM_PROT_READ)
maxprot |= VM_PROT_EXECUTE;
#endif
#endif
- result = mach_vm_map(user_map, &user_addr, user_size, 0,
- alloc_flags, IPC_PORT_NULL, 0,
- FALSE, prot, maxprot,
- (flags & MAP_SHARED) ? VM_INHERIT_SHARE :
- VM_INHERIT_DEFAULT);
- if (result != KERN_SUCCESS)
- goto out;
+
+#if 3777787
+ if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
+ prot |= VM_PROT_READ;
+ if (maxprot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
+ maxprot |= VM_PROT_READ;
+#endif /* radar 3777787 */
+map_anon_retry:
+ result = vm_map_enter_mem_object(user_map,
+ &user_addr, user_size,
+ 0, alloc_flags,
+ IPC_PORT_NULL, 0, FALSE,
+ prot, maxprot,
+ (flags & MAP_SHARED) ?
+ VM_INHERIT_SHARE :
+ VM_INHERIT_DEFAULT);
+
+ /* If a non-binding address was specified for this anonymous
+ * mapping, retry the mapping with a zero base
+ * in the event the mapping operation failed due to
+ * lack of space between the address and the map's maximum.
+ */
+ if ((result == KERN_NO_SPACE) && ((flags & MAP_FIXED) == 0) && user_addr && (num_retries++ == 0)) {
+ user_addr = vm_map_page_size(user_map);
+ goto map_anon_retry;
+ }
} else {
- UBCINFOCHECK("mmap", vp);
- pager = (vm_pager_t)ubc_getpager(vp);
+ if (vnode_isswap(vp)) {
+ /*
+ * Map swap files with a special pager
+ * that returns obfuscated contents.
+ */
+ control = NULL;
+ pager = swapfile_pager_setup(vp);
+ if (pager != MEMORY_OBJECT_NULL) {
+ control = swapfile_pager_control(pager);
+ }
+ } else {
+ control = ubc_getobject(vp, UBC_FLAGS_NONE);
+ }
- if (pager == NULL) {
+ if (control == NULL) {
(void)vnode_put(vp);
error = ENOMEM;
goto bad;
#if defined(VM_PROT_READ_IS_EXEC)
if (prot & VM_PROT_READ)
prot |= VM_PROT_EXECUTE;
-
if (maxprot & VM_PROT_READ)
maxprot |= VM_PROT_EXECUTE;
#endif
#endif /* notyet */
- result = mach_vm_map(user_map, &user_addr, user_size,
- 0, alloc_flags, (ipc_port_t)pager, file_pos,
- docow, prot, maxprot,
- (flags & MAP_SHARED) ? VM_INHERIT_SHARE :
- VM_INHERIT_DEFAULT);
-
- if (result != KERN_SUCCESS) {
- (void)vnode_put(vp);
- goto out;
+#if 3777787
+ if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
+ prot |= VM_PROT_READ;
+ if (maxprot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
+ maxprot |= VM_PROT_READ;
+#endif /* radar 3777787 */
+map_file_retry:
+ result = vm_map_enter_mem_object_control(user_map,
+ &user_addr, user_size,
+ 0, alloc_flags,
+ control, file_pos,
+ docow, prot, maxprot,
+ (flags & MAP_SHARED) ?
+ VM_INHERIT_SHARE :
+ VM_INHERIT_DEFAULT);
+
+ /* If a non-binding address was specified for this file backed
+ * mapping, retry the mapping with a zero base
+ * in the event the mapping operation failed due to
+ * lack of space between the address and the map's maximum.
+ */
+ if ((result == KERN_NO_SPACE) && ((flags & MAP_FIXED) == 0) && user_addr && (num_retries++ == 0)) {
+ user_addr = vm_map_page_size(user_map);
+ goto map_file_retry;
}
-
- (void)ubc_map(vp,(prot & ( PROT_EXEC | PROT_READ | PROT_WRITE | PROT_EXEC)));
}
- if (!mapanon)
+ if (!mapanon) {
(void)vnode_put(vp);
+ }
-out:
switch (result) {
case KERN_SUCCESS:
*retval = user_addr + pageoff;
break;
}
bad:
+ if (pager != MEMORY_OBJECT_NULL) {
+ /*
+ * Release the reference on the pager.
+ * If the mapping was successful, it now holds
+ * an extra reference.
+ */
+ memory_object_deallocate(pager);
+ }
if (fpref)
fp_drop(p, fd, fp, 0);
+
+ KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO, SYS_mmap) | DBG_FUNC_NONE), fd, (uint32_t)(*retval), (uint32_t)user_size, error, 0);
+ KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO2, SYS_mmap) | DBG_FUNC_NONE), (uint32_t)(*retval >> 32), (uint32_t)(user_size >> 32),
+ (uint32_t)(file_pos >> 32), (uint32_t)file_pos, 0);
return(error);
}
int
-msync(__unused struct proc *p, struct msync_args *uap, __unused register_t *retval)
+msync(__unused proc_t p, struct msync_args *uap, int32_t *retval)
+{
+ __pthread_testcancel(1);
+ return(msync_nocancel(p, (struct msync_nocancel_args *)uap, retval));
+}
+
+int
+msync_nocancel(__unused proc_t p, struct msync_nocancel_args *uap, __unused int32_t *retval)
{
mach_vm_offset_t addr;
mach_vm_size_t size;
int rv;
vm_sync_t sync_flags=0;
+ user_map = current_map();
addr = (mach_vm_offset_t) uap->addr;
size = (mach_vm_size_t)uap->len;
-
- if (addr & PAGE_MASK_64) {
+ KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO, SYS_msync) | DBG_FUNC_NONE), (uint32_t)(addr >> 32), (uint32_t)(size >> 32), 0, 0, 0);
+ if (addr & vm_map_page_mask(user_map)) {
/* UNIX SPEC: user address is not page-aligned, return EINVAL */
return EINVAL;
}
flags = uap->flags;
/* disallow contradictory flags */
- if ((flags & (MS_SYNC|MS_ASYNC)) == (MS_SYNC|MS_ASYNC) ||
- (flags & (MS_ASYNC|MS_INVALIDATE)) == (MS_ASYNC|MS_INVALIDATE))
+ if ((flags & (MS_SYNC|MS_ASYNC)) == (MS_SYNC|MS_ASYNC))
return (EINVAL);
if (flags & MS_KILLPAGES)
sync_flags |= VM_SYNC_CONTIGUOUS; /* complain if holes */
- user_map = current_map();
rv = mach_vm_msync(user_map, addr, size, sync_flags);
switch (rv) {
int
-mremap(void)
-{
- /* Not yet implemented */
- return (ENOTSUP);
-}
-
-int
-munmap(__unused struct proc *p, struct munmap_args *uap, __unused register_t *retval)
+munmap(__unused proc_t p, struct munmap_args *uap, __unused int32_t *retval)
{
mach_vm_offset_t user_addr;
- mach_vm_size_t user_size;
- kern_return_t result;
+ mach_vm_size_t user_size;
+ kern_return_t result;
+ vm_map_t user_map;
+ user_map = current_map();
user_addr = (mach_vm_offset_t) uap->addr;
user_size = (mach_vm_size_t) uap->len;
AUDIT_ARG(addr, user_addr);
AUDIT_ARG(len, user_size);
- if (user_addr & PAGE_MASK_64) {
+ if (user_addr & vm_map_page_mask(user_map)) {
/* UNIX SPEC: user address is not page-aligned, return EINVAL */
return EINVAL;
}
return EINVAL;
}
- result = mach_vm_deallocate(current_map(), user_addr, user_size);
+ result = mach_vm_deallocate(user_map, user_addr, user_size);
if (result != KERN_SUCCESS) {
return(EINVAL);
}
}
int
-mprotect(__unused struct proc *p, struct mprotect_args *uap, __unused register_t *retval)
+mprotect(__unused proc_t p, struct mprotect_args *uap, __unused int32_t *retval)
{
register vm_prot_t prot;
mach_vm_offset_t user_addr;
mach_vm_size_t user_size;
kern_return_t result;
vm_map_t user_map;
+#if CONFIG_MACF
+ int error;
+#endif
AUDIT_ARG(addr, uap->addr);
AUDIT_ARG(len, uap->len);
- AUDIT_ARG(value, uap->prot);
+ AUDIT_ARG(value32, uap->prot);
+ user_map = current_map();
user_addr = (mach_vm_offset_t) uap->addr;
user_size = (mach_vm_size_t) uap->len;
- prot = (vm_prot_t)(uap->prot & VM_PROT_ALL);
+ prot = (vm_prot_t)(uap->prot & (VM_PROT_ALL | VM_PROT_TRUSTED));
- if (user_addr & PAGE_MASK_64) {
+ if (user_addr & vm_map_page_mask(user_map)) {
/* UNIX SPEC: user address is not page-aligned, return EINVAL */
return EINVAL;
}
#endif
#endif /* notyet */
- user_map = current_map();
+#if 3936456
+ if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
+ prot |= VM_PROT_READ;
+#endif /* 3936456 */
+#if CONFIG_MACF
+ /*
+ * The MAC check for mprotect is of limited use for 2 reasons:
+ * Without mmap revocation, the caller could have asked for the max
+ * protections initially instead of a reduced set, so a mprotect
+ * check would offer no new security.
+ * It is not possible to extract the vnode from the pager object(s)
+ * of the target memory range.
+ * However, the MAC check may be used to prevent a process from,
+ * e.g., making the stack executable.
+ */
+ error = mac_proc_check_mprotect(p, user_addr,
+ user_size, prot);
+ if (error)
+ return (error);
+#endif
+
+ if(prot & VM_PROT_TRUSTED) {
+#if CONFIG_DYNAMIC_CODE_SIGNING
+ /* CODE SIGNING ENFORCEMENT - JIT support */
+ /* The special protection value VM_PROT_TRUSTED requests that we treat
+ * this page as if it had a valid code signature.
+ * If this is enabled, there MUST be a MAC policy implementing the
+ * mac_proc_check_mprotect() hook above. Otherwise, Codesigning will be
+ * compromised because the check would always succeed and thusly any
+ * process could sign dynamically. */
+ result = vm_map_sign(
+ user_map,
+ vm_map_trunc_page(user_addr,
+ vm_map_page_mask(user_map)),
+ vm_map_round_page(user_addr+user_size,
+ vm_map_page_mask(user_map)));
+ switch (result) {
+ case KERN_SUCCESS:
+ break;
+ case KERN_INVALID_ADDRESS:
+ /* UNIX SPEC: for an invalid address range, return ENOMEM */
+ return ENOMEM;
+ default:
+ return EINVAL;
+ }
+#else
+ return ENOTSUP;
+#endif
+ }
+ prot &= ~VM_PROT_TRUSTED;
+
result = mach_vm_protect(user_map, user_addr, user_size,
FALSE, prot);
switch (result) {
int
-minherit(__unused struct proc *p, struct minherit_args *uap, __unused register_t *retval)
+minherit(__unused proc_t p, struct minherit_args *uap, __unused int32_t *retval)
{
mach_vm_offset_t addr;
mach_vm_size_t size;
AUDIT_ARG(addr, uap->addr);
AUDIT_ARG(len, uap->len);
- AUDIT_ARG(value, uap->inherit);
+ AUDIT_ARG(value32, uap->inherit);
addr = (mach_vm_offset_t)uap->addr;
size = (mach_vm_size_t)uap->len;
}
int
-madvise(__unused struct proc *p, struct madvise_args *uap, __unused register_t *retval)
+madvise(__unused proc_t p, struct madvise_args *uap, __unused int32_t *retval)
{
vm_map_t user_map;
mach_vm_offset_t start;
case MADV_DONTNEED:
new_behavior = VM_BEHAVIOR_DONTNEED;
break;
+ case MADV_FREE:
+ new_behavior = VM_BEHAVIOR_FREE;
+ break;
+ case MADV_ZERO_WIRED_PAGES:
+ new_behavior = VM_BEHAVIOR_ZERO_WIRED_PAGES;
+ break;
+ case MADV_FREE_REUSABLE:
+ new_behavior = VM_BEHAVIOR_REUSABLE;
+ break;
+ case MADV_FREE_REUSE:
+ new_behavior = VM_BEHAVIOR_REUSE;
+ break;
+ case MADV_CAN_REUSE:
+ new_behavior = VM_BEHAVIOR_CAN_REUSE;
+ break;
default:
return(EINVAL);
}
result = mach_vm_behavior_set(user_map, start, size, new_behavior);
switch (result) {
- case KERN_SUCCESS:
- return (0);
- case KERN_INVALID_ADDRESS:
- return (ENOMEM);
+ case KERN_SUCCESS:
+ return 0;
+ case KERN_INVALID_ADDRESS:
+ return EINVAL;
+ case KERN_NO_SPACE:
+ return ENOMEM;
}
- return (EINVAL);
+ return EINVAL;
}
int
-mincore(__unused struct proc *p, struct mincore_args *uap, __unused register_t *retval)
+mincore(__unused proc_t p, struct mincore_args *uap, __unused int32_t *retval)
{
mach_vm_offset_t addr, first_addr, end;
vm_map_t map;
* Make sure that the addresses presented are valid for user
* mode.
*/
- first_addr = addr = mach_vm_trunc_page(uap->addr);
- end = addr + mach_vm_round_page(uap->len);
+ first_addr = addr = vm_map_trunc_page(uap->addr,
+ vm_map_page_mask(map));
+ end = addr + vm_map_round_page(uap->len,
+ vm_map_page_mask(map));
if (end < addr)
return (EINVAL);
lastvecindex = -1;
for( ; addr < end; addr += PAGE_SIZE ) {
pqueryinfo = 0;
- ret = vm_map_page_query(map, addr, &pqueryinfo, &numref);
+ ret = mach_vm_page_query(map, addr, &pqueryinfo, &numref);
if (ret != KERN_SUCCESS)
pqueryinfo = 0;
mincoreinfo = 0;
}
int
-mlock(__unused struct proc *p, struct mlock_args *uap, __unused register_t *retvalval)
+mlock(__unused proc_t p, struct mlock_args *uap, __unused int32_t *retvalval)
{
vm_map_t user_map;
vm_map_offset_t addr;
if (size == 0)
return (0);
- pageoff = (addr & PAGE_MASK);
- addr -= pageoff;
- size = vm_map_round_page(size+pageoff);
-
-#ifdef notyet
-/* Hmm.. What am I going to do with this? */
- if (atop(size) + cnt.v_wire_count > vm_page_max_wired)
- return (EAGAIN);
-#ifdef pmap_wired_count
- if (size + ptoa(pmap_wired_count(vm_map_pmap(&p->p_vmspace->vm_map))) >
- p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur)
- return (ENOMEM);
-#else
- error = suser(kauth_cred_get(), &p->p_acflag);
- if (error)
- return (error);
-#endif
-#endif /* notyet */
-
user_map = current_map();
+ pageoff = (addr & vm_map_page_mask(user_map));
+ addr -= pageoff;
+ size = vm_map_round_page(size+pageoff, vm_map_page_mask(user_map));
/* have to call vm_map_wire directly to pass "I don't know" protections */
result = vm_map_wire(user_map, addr, addr+size, VM_PROT_NONE, TRUE);
- return (result == KERN_SUCCESS ? 0 : ENOMEM);
+
+ if (result == KERN_RESOURCE_SHORTAGE)
+ return EAGAIN;
+ else if (result != KERN_SUCCESS)
+ return ENOMEM;
+
+ return 0; /* KERN_SUCCESS */
}
int
-munlock(__unused struct proc *p, struct munlock_args *uap, __unused register_t *retval)
+munlock(__unused proc_t p, struct munlock_args *uap, __unused int32_t *retval)
{
mach_vm_offset_t addr;
mach_vm_size_t size;
addr = (mach_vm_offset_t) uap->addr;
size = (mach_vm_size_t)uap->len;
-
-
-#ifdef notyet
-/* Hmm.. What am I going to do with this? */
-#ifndef pmap_wired_count
- error = suser(kauth_cred_get(), &p->p_acflag);
- if (error)
- return (error);
-#endif
-#endif /* notyet */
-
user_map = current_map();
/* JMM - need to remove all wirings by spec - this just removes one */
int
-mlockall(__unused struct proc *p, __unused struct mlockall_args *uap, __unused register_t *retval)
+mlockall(__unused proc_t p, __unused struct mlockall_args *uap, __unused int32_t *retval)
{
return (ENOSYS);
}
int
-munlockall(__unused struct proc *p, __unused struct munlockall_args *uap, __unused register_t *retval)
+munlockall(__unused proc_t p, __unused struct munlockall_args *uap, __unused int32_t *retval)
{
return(ENOSYS);
}
-
-/* BEGIN DEFUNCT */
-int
-obreak(__unused struct proc *p, __unused struct obreak_args *uap, __unused register_t *retval)
-{
- /* Not implemented, obsolete */
- return (ENOMEM);
-}
-
-int both;
-
-int
-ovadvise(__unused struct proc *p, __unused struct ovadvise_args *uap, __unused register_t *retval)
-{
-
-#ifdef lint
- both = 0;
-#endif
- return( 0 );
-}
-/* END DEFUNCT */
-
/* USV: No! need to obsolete map_fd()! mmap() already supports 64 bits */
kern_return_t
map_fd(struct map_fd_args *args)
kern_return_t ret;
AUDIT_MACH_SYSCALL_ENTER(AUE_MAPFD);
- AUDIT_ARG(addr, CAST_DOWN(user_addr_t, va));
+ AUDIT_ARG(addr, CAST_DOWN(user_addr_t, args->va));
AUDIT_ARG(fd, fd);
ret = map_fd_funneled( fd, (vm_object_offset_t)offset, va, findspace, size);
vm_offset_t map_addr=0;
vm_size_t map_size;
int err=0;
+ vm_prot_t maxprot = VM_PROT_ALL;
vm_map_t my_map;
- struct proc *p =(struct proc *)current_proc();
+ proc_t p = current_proc();
struct vnode_attr vattr;
- struct vfs_context context;
+
+ my_map = current_map();
/*
* Find the inode; verify that it's a regular file.
if (err)
return(err);
- if (fp->f_fglob->fg_type != DTYPE_VNODE){
+ if (FILEGLOB_DTYPE(fp->f_fglob) != DTYPE_VNODE) {
err = KERN_INVALID_ARGUMENT;
goto bad;
}
goto bad;
}
+#if CONFIG_MACF
+ err = mac_file_check_mmap(vfs_context_ucred(vfs_context_current()),
+ fp->f_fglob, VM_PROT_DEFAULT, MAP_FILE, &maxprot);
+ if (err) {
+ (void)vnode_put(vp);
+ goto bad;
+ }
+#endif /* MAC */
+
+#if CONFIG_PROTECT
+ /* check for content protection access */
+ {
+ err = cp_handle_vnop(vp, CP_READ_ACCESS | CP_WRITE_ACCESS, 0);
+ if (err != 0) {
+ (void) vnode_put(vp);
+ goto bad;
+ }
+ }
+#endif /* CONFIG_PROTECT */
+
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
- /* conformance change - mmap needs to update access time for mapped
- * files
+ /*
+ * POSIX: mmap needs to update access time for mapped files
*/
- VATTR_INIT(&vattr);
- nanotime(&vattr.va_access_time);
- VATTR_SET_ACTIVE(&vattr, va_access_time);
- context.vc_proc = p;
- context.vc_ucred = kauth_cred_get();
- vnode_setattr(vp, &vattr, &context);
-
- if (offset & PAGE_MASK_64) {
+ if ((vnode_vfsvisflags(vp) & MNT_NOATIME) == 0) {
+ VATTR_INIT(&vattr);
+ nanotime(&vattr.va_access_time);
+ VATTR_SET_ACTIVE(&vattr, va_access_time);
+ vnode_setattr(vp, &vattr, vfs_context_current());
+ }
+
+ if (offset & vm_map_page_mask(my_map)) {
printf("map_fd: file offset not page aligned(%d : %s)\n",p->p_pid, p->p_comm);
(void)vnode_put(vp);
err = KERN_INVALID_ARGUMENT;
goto bad;
}
- map_size = round_page(size);
+ map_size = vm_map_round_page(size, vm_map_page_mask(my_map));
/*
* Allow user to map in a zero length file.
/*
* Map in the file.
*/
- UBCINFOCHECK("map_fd_funneled", vp);
- pager = (void *) ubc_getpager(vp);
+ pager = (void *)ubc_getpager(vp);
if (pager == NULL) {
(void)vnode_put(vp);
err = KERN_FAILURE;
goto bad;
}
-
- my_map = current_map();
-
result = vm_map_64(
my_map,
&map_addr, map_size, (vm_offset_t)0,
VM_FLAGS_ANYWHERE, pager, offset, TRUE,
- VM_PROT_DEFAULT, VM_PROT_ALL,
+ VM_PROT_DEFAULT, maxprot,
VM_INHERIT_DEFAULT);
if (result != KERN_SUCCESS) {
(void)vnode_put(vp);
if (!findspace) {
- vm_offset_t dst_addr;
+ //K64todo fix for 64bit user?
+ uint32_t dst_addr;
vm_map_copy_t tmp;
if (copyin(CAST_USER_ADDR_T(va), &dst_addr, sizeof (dst_addr)) ||
- trunc_page_32(dst_addr) != dst_addr) {
+ trunc_page(dst_addr) != dst_addr) {
(void) vm_map_remove(
my_map,
map_addr, map_addr + map_size,
(vm_map_size_t)map_size, TRUE, &tmp);
if (result != KERN_SUCCESS) {
- (void) vm_map_remove(my_map, vm_map_trunc_page(map_addr),
- vm_map_round_page(map_addr + map_size),
- VM_MAP_NO_FLAGS);
+ (void) vm_map_remove(
+ my_map,
+ vm_map_trunc_page(map_addr,
+ vm_map_page_mask(my_map)),
+ vm_map_round_page(map_addr + map_size,
+ vm_map_page_mask(my_map)),
+ VM_MAP_NO_FLAGS);
(void)vnode_put(vp);
err = result;
goto bad;
goto bad;
}
} else {
- if (copyout(&map_addr, CAST_USER_ADDR_T(va), sizeof (map_addr))) {
- (void) vm_map_remove(my_map, vm_map_trunc_page(map_addr),
- vm_map_round_page(map_addr + map_size),
- VM_MAP_NO_FLAGS);
+ // K64todo bug compatible now, should fix for 64bit user
+ uint32_t user_map_addr = CAST_DOWN_EXPLICIT(uint32_t, map_addr);
+ if (copyout(&user_map_addr, CAST_USER_ADDR_T(va), sizeof (user_map_addr))) {
+ (void) vm_map_remove(
+ my_map,
+ vm_map_trunc_page(map_addr,
+ vm_map_page_mask(my_map)),
+ vm_map_round_page(map_addr + map_size,
+ vm_map_page_mask(my_map)),
+ VM_MAP_NO_FLAGS);
(void)vnode_put(vp);
err = KERN_INVALID_ADDRESS;
goto bad;
}
ubc_setthreadcred(vp, current_proc(), current_thread());
- (void)ubc_map(vp, (PROT_READ | PROT_WRITE | PROT_EXEC));
(void)vnode_put(vp);
err = 0;
bad:
projects / apple / xnu.git / blobdiff