#include <sys/ubc.h>
#include <sys/ubc_internal.h>
#include <sys/sysproto.h>
+#if CONFIG_PROTECT
+#include <sys/cprotect.h>
+#endif
#include <sys/syscall.h>
#include <sys/kdebug.h>
+#include <sys/bsdtask_info.h>
#include <security/audit/audit.h>
#include <bsm/audit_kevents.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 <kern/page_decrypt.h>
+
+#include <IOKit/IOReturn.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_pager.h>
#include <vm/vm_protos.h>
-/* 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
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=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);
* 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)
- return (EINVAL);
+ if (user_addr & vm_map_page_mask(user_map))
+ return (EINVAL);
}
#ifdef notyet
/* DO not have apis to get this info, need to wait till then*/
* 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
+ /*
+ * 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.
* Use "fd" to pass (some) Mach VM allocation flags,
* (see the VM_FLAGS_* definitions).
*/
- alloc_flags = fd & (VM_FLAGS_ALIAS_MASK |
+ 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 */
}
handle = NULL;
- maxprot = VM_PROT_ALL;
file_pos = 0;
mapanon = 1;
} else {
struct vnode_attr va;
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;
}
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);
+ 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;
if (flags & MAP_NOCACHE)
alloc_flags |= VM_FLAGS_NO_CACHE;
+ if (flags & MAP_JIT){
+ alloc_flags |= VM_FLAGS_MAP_JIT;
+ }
/*
* Lookup/allocate object.
*/
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,
(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 {
if (vnode_isswap(vp)) {
/*
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,
(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;
+ }
}
if (!mapanon) {
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 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;
-
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 & PAGE_MASK_64) {
+ if (addr & vm_map_page_mask(user_map)) {
/* UNIX SPEC: user address is not page-aligned, return EINVAL */
return EINVAL;
}
sync_flags |= VM_SYNC_CONTIGUOUS; /* complain if holes */
- user_map = current_map();
rv = mach_vm_msync(user_map, addr, size, sync_flags);
switch (rv) {
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);
}
AUDIT_ARG(len, uap->len);
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;
}
prot |= VM_PROT_READ;
#endif /* 3936456 */
- user_map = current_map();
-
#if CONFIG_MACF
/*
* The MAC check for mprotect is of limited use for 2 reasons:
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) {
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
* 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);
if (size == 0)
return (0);
- pageoff = (addr & PAGE_MASK);
- addr -= pageoff;
- size = vm_map_round_page(size+pageoff);
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(ENOSYS);
}
-/* USV: No! need to obsolete map_fd()! mmap() already supports 64 bits */
-kern_return_t
-map_fd(struct map_fd_args *args)
-{
- int fd = args->fd;
- vm_offset_t offset = args->offset;
- vm_offset_t *va = args->va;
- boolean_t findspace = args->findspace;
- vm_size_t size = args->size;
- kern_return_t ret;
-
- AUDIT_MACH_SYSCALL_ENTER(AUE_MAPFD);
- 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);
-
- AUDIT_MACH_SYSCALL_EXIT(ret);
- return ret;
-}
-
-kern_return_t
-map_fd_funneled(
- int fd,
- vm_object_offset_t offset,
- vm_offset_t *va,
- boolean_t findspace,
- vm_size_t size)
+#if CONFIG_CODE_DECRYPTION
+int
+mremap_encrypted(__unused struct proc *p, struct mremap_encrypted_args *uap, __unused int32_t *retval)
{
- kern_return_t result;
- struct fileproc *fp;
- struct vnode *vp;
- void * pager;
- vm_offset_t map_addr=0;
- vm_size_t map_size;
- int err=0;
- vm_map_t my_map;
- proc_t p = current_proc();
- struct vnode_attr vattr;
-
- /*
- * Find the inode; verify that it's a regular file.
- */
-
- err = fp_lookup(p, fd, &fp, 0);
- if (err)
- return(err);
-
- if (fp->f_fglob->fg_type != DTYPE_VNODE){
- err = KERN_INVALID_ARGUMENT;
- goto bad;
- }
-
- if (!(fp->f_fglob->fg_flag & FREAD)) {
- err = KERN_PROTECTION_FAILURE;
- goto bad;
- }
-
- vp = (struct vnode *)fp->f_fglob->fg_data;
- err = vnode_getwithref(vp);
- if(err != 0)
- goto bad;
-
- if (vp->v_type != VREG) {
- (void)vnode_put(vp);
- err = KERN_INVALID_ARGUMENT;
- goto bad;
- }
-
- AUDIT_ARG(vnpath, vp, ARG_VNODE1);
-
- /*
- * POSIX: mmap needs to update access time for mapped files
- */
- 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 & PAGE_MASK_64) {
- 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);
-
- /*
- * Allow user to map in a zero length file.
- */
- if (size == 0) {
- (void)vnode_put(vp);
- err = KERN_SUCCESS;
- goto bad;
- }
- /*
- * Map in the file.
- */
- 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_INHERIT_DEFAULT);
- if (result != KERN_SUCCESS) {
- (void)vnode_put(vp);
- err = result;
- goto bad;
- }
-
-
- if (!findspace) {
- //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(dst_addr) != dst_addr) {
- (void) vm_map_remove(
- my_map,
- map_addr, map_addr + map_size,
- VM_MAP_NO_FLAGS);
- (void)vnode_put(vp);
- err = KERN_INVALID_ADDRESS;
- goto bad;
- }
-
- result = vm_map_copyin(my_map, (vm_map_address_t)map_addr,
- (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)vnode_put(vp);
- err = result;
- goto bad;
- }
-
- result = vm_map_copy_overwrite(my_map,
- (vm_map_address_t)dst_addr, tmp, FALSE);
- if (result != KERN_SUCCESS) {
- vm_map_copy_discard(tmp);
- (void)vnode_put(vp);
- err = result;
- goto bad;
- }
- } else {
- // 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_round_page(map_addr + map_size),
- VM_MAP_NO_FLAGS);
- (void)vnode_put(vp);
- err = KERN_INVALID_ADDRESS;
- goto bad;
- }
- }
-
- ubc_setthreadcred(vp, current_proc(), current_thread());
- (void)vnode_put(vp);
- err = 0;
-bad:
- fp_drop(p, fd, fp, 0);
- return (err);
+ mach_vm_offset_t user_addr;
+ mach_vm_size_t user_size;
+ kern_return_t result;
+ vm_map_t user_map;
+ uint32_t cryptid;
+ cpu_type_t cputype;
+ cpu_subtype_t cpusubtype;
+ pager_crypt_info_t crypt_info;
+ const char * cryptname = 0;
+ char *vpath;
+ int len, ret;
+ struct proc_regioninfo_internal pinfo;
+ vnode_t vp;
+ uintptr_t vnodeaddr;
+ uint32_t vid;
+
+ AUDIT_ARG(addr, uap->addr);
+ AUDIT_ARG(len, uap->len);
+
+ user_map = current_map();
+ user_addr = (mach_vm_offset_t) uap->addr;
+ user_size = (mach_vm_size_t) uap->len;
+
+ cryptid = uap->cryptid;
+ cputype = uap->cputype;
+ cpusubtype = uap->cpusubtype;
+
+ if (user_addr & vm_map_page_mask(user_map)) {
+ /* UNIX SPEC: user address is not page-aligned, return EINVAL */
+ return EINVAL;
+ }
+
+ switch(cryptid) {
+ case 0:
+ /* not encrypted, just an empty load command */
+ return 0;
+ case 1:
+ cryptname="com.apple.unfree";
+ break;
+ case 0x10:
+ /* some random cryptid that you could manually put into
+ * your binary if you want NULL */
+ cryptname="com.apple.null";
+ break;
+ default:
+ return EINVAL;
+ }
+
+ if (NULL == text_crypter_create) return ENOTSUP;
+
+ ret = fill_procregioninfo_onlymappedvnodes( proc_task(p), user_addr, &pinfo, &vnodeaddr, &vid);
+ if (ret == 0 || !vnodeaddr) {
+ /* No really, this returns 0 if the memory address is not backed by a file */
+ return (EINVAL);
+ }
+
+ vp = (vnode_t)vnodeaddr;
+ if ((vnode_getwithvid(vp, vid)) == 0) {
+ MALLOC_ZONE(vpath, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
+ if(vpath == NULL) {
+ vnode_put(vp);
+ return (ENOMEM);
+ }
+
+ len = MAXPATHLEN;
+ ret = vn_getpath(vp, vpath, &len);
+ if(ret) {
+ FREE_ZONE(vpath, MAXPATHLEN, M_NAMEI);
+ vnode_put(vp);
+ return (ret);
+ }
+
+ vnode_put(vp);
+ } else {
+ return (EINVAL);
+ }
+
+#if 0
+ kprintf("%s vpath %s cryptid 0x%08x cputype 0x%08x cpusubtype 0x%08x range 0x%016llx size 0x%016llx\n",
+ __FUNCTION__, vpath, cryptid, cputype, cpusubtype, (uint64_t)user_addr, (uint64_t)user_size);
+#endif
+
+ /* set up decrypter first */
+ crypt_file_data_t crypt_data = {
+ .filename = vpath,
+ .cputype = cputype,
+ .cpusubtype = cpusubtype };
+ result = text_crypter_create(&crypt_info, cryptname, (void*)&crypt_data);
+ FREE_ZONE(vpath, MAXPATHLEN, M_NAMEI);
+
+ if(result) {
+ printf("%s: unable to create decrypter %s, kr=%d\n",
+ __FUNCTION__, cryptname, result);
+ if (result == kIOReturnNotPrivileged) {
+ /* text encryption returned decryption failure */
+ return (EPERM);
+ } else {
+ return (ENOMEM);
+ }
+ }
+
+ /* now remap using the decrypter */
+ result = vm_map_apple_protected(user_map, user_addr, user_addr+user_size, &crypt_info);
+ if (result) {
+ printf("%s: mapping failed with %d\n", __FUNCTION__, result);
+ crypt_info.crypt_end(crypt_info.crypt_ops);
+ return (EPERM);
+ }
+
+ return 0;
}
-
+#endif /* CONFIG_CODE_DECRYPTION */
projects / apple / xnu.git / blobdiff