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Merge branch 'master' into next

Browse Source 
Conflicts:
	fs/namei.c

Manually merged per:

diff --cc fs/namei.c
index 734f2b5,bbc15c2..0000000
--- a/fs/namei.c
+++ b/fs/namei.c
@@@ -860,9 -848,8 +849,10 @@@ static int __link_path_walk(const char
  		nd->flags |= LOOKUP_CONTINUE;
  		err = exec_permission_lite(inode);
  		if (err == -EAGAIN)
- 			err = vfs_permission(nd, MAY_EXEC);
+ 			err = inode_permission(nd->path.dentry->d_inode,
+ 					       MAY_EXEC);
 +		if (!err)
 +			err = ima_path_check(&nd->path, MAY_EXEC);
   		if (err)
  			break;

@@@ -1525,14 -1506,9 +1509,14 @@@ int may_open(struct path *path, int acc
  		flag &= ~O_TRUNC;
  	}

- 	error = vfs_permission(nd, acc_mode);
+ 	error = inode_permission(inode, acc_mode);
  	if (error)
  		return error;
 +
- 	error = ima_path_check(&nd->path,
++	error = ima_path_check(path,
 +			       acc_mode & (MAY_READ | MAY_WRITE | MAY_EXEC));
 +	if (error)
 +		return error;
  	/*
  	 * An append-only file must be opened in append mode for writing.
  	 */

Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
James Morris
2009-02-06 11:01:45 +11:00
parent 8920d5ad6b f01d1d546a
commit cb5629b10d
6302 changed files with 762933 additions and 123441 deletions
Download Patch File Download Diff File Expand all files Collapse all files

117
mm/mmap.c
View File

@@ -3,7 +3,7 @@
*
* Written by obz.
*
* Address space accounting code <alan@redhat.com>
* Address space accounting code <alan@lxorguk.ukuu.org.uk>
*/
#include <linux/slab.h>
@@ -246,7 +246,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
return next;
}
asmlinkage unsigned long sys_brk(unsigned long brk)
SYSCALL_DEFINE1(brk, unsigned long, brk)
{
unsigned long rlim, retval;
unsigned long newbrk, oldbrk;
@@ -414,7 +414,7 @@ void __vma_link_rb(struct mm_struct *mm, struct vm_area_struct *vma,
static void __vma_link_file(struct vm_area_struct *vma)
{
struct file * file;
struct file *file;
file = vma->vm_file;
if (file) {
@@ -475,11 +475,10 @@ static void vma_link(struct mm_struct *mm, struct vm_area_struct *vma,
* insert vm structure into list and rbtree and anon_vma,
* but it has already been inserted into prio_tree earlier.
*/
static void
__insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma)
static void __insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma)
{
struct vm_area_struct * __vma, * prev;
struct rb_node ** rb_link, * rb_parent;
struct vm_area_struct *__vma, *prev;
struct rb_node **rb_link, *rb_parent;
__vma = find_vma_prepare(mm, vma->vm_start,&prev, &rb_link, &rb_parent);
BUG_ON(__vma && __vma->vm_start < vma->vm_end);
@@ -660,6 +659,9 @@ again: remove_next = 1 + (end > next->vm_end);
validate_mm(mm);
}
/* Flags that can be inherited from an existing mapping when merging */
#define VM_MERGEABLE_FLAGS (VM_CAN_NONLINEAR)
/*
* If the vma has a ->close operation then the driver probably needs to release
* per-vma resources, so we don't attempt to merge those.
@@ -667,7 +669,7 @@ again: remove_next = 1 + (end > next->vm_end);
static inline int is_mergeable_vma(struct vm_area_struct *vma,
struct file *file, unsigned long vm_flags)
{
if (vma->vm_flags != vm_flags)
if ((vma->vm_flags ^ vm_flags) & ~VM_MERGEABLE_FLAGS)
return 0;
if (vma->vm_file != file)
return 0;
@@ -909,7 +911,7 @@ void vm_stat_account(struct mm_struct *mm, unsigned long flags,
* The caller must hold down_write(current->mm->mmap_sem).
*/
unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
unsigned long len, unsigned long prot,
unsigned long flags, unsigned long pgoff)
{
@@ -1092,6 +1094,15 @@ int vma_wants_writenotify(struct vm_area_struct *vma)
mapping_cap_account_dirty(vma->vm_file->f_mapping);
}
/*
* We account for memory if it's a private writeable mapping,
* and VM_NORESERVE wasn't set.
*/
static inline int accountable_mapping(unsigned int vm_flags)
{
return (vm_flags & (VM_NORESERVE | VM_SHARED | VM_WRITE)) == VM_WRITE;
}
unsigned long mmap_region(struct file *file, unsigned long addr,
unsigned long len, unsigned long flags,
unsigned int vm_flags, unsigned long pgoff,
@@ -1119,36 +1130,32 @@ munmap_back:
if (!may_expand_vm(mm, len >> PAGE_SHIFT))
return -ENOMEM;
if (flags & MAP_NORESERVE)
/*
* Set 'VM_NORESERVE' if we should not account for the
* memory use of this mapping. We only honor MAP_NORESERVE
* if we're allowed to overcommit memory.
*/
if ((flags & MAP_NORESERVE) && sysctl_overcommit_memory != OVERCOMMIT_NEVER)
vm_flags |= VM_NORESERVE;
if (!accountable)
vm_flags |= VM_NORESERVE;
if (accountable && (!(flags & MAP_NORESERVE) ||
sysctl_overcommit_memory == OVERCOMMIT_NEVER)) {
if (vm_flags & VM_SHARED) {
/* Check memory availability in shmem_file_setup? */
vm_flags |= VM_ACCOUNT;
} else if (vm_flags & VM_WRITE) {
/*
* Private writable mapping: check memory availability
*/
charged = len >> PAGE_SHIFT;
if (security_vm_enough_memory(charged))
return -ENOMEM;
vm_flags |= VM_ACCOUNT;
}
/*
* Private writable mapping: check memory availability
*/
if (accountable_mapping(vm_flags)) {
charged = len >> PAGE_SHIFT;
if (security_vm_enough_memory(charged))
return -ENOMEM;
vm_flags |= VM_ACCOUNT;
}
/*
* Can we just expand an old private anonymous mapping?
* The VM_SHARED test is necessary because shmem_zero_setup
* will create the file object for a shared anonymous map below.
* Can we just expand an old mapping?
*/
if (!file && !(vm_flags & VM_SHARED)) {
vma = vma_merge(mm, prev, addr, addr + len, vm_flags,
NULL, NULL, pgoff, NULL);
if (vma)
goto out;
}
vma = vma_merge(mm, prev, addr, addr + len, vm_flags, NULL, file, pgoff, NULL);
if (vma)
goto out;
/*
* Determine the object being mapped and call the appropriate
@@ -1191,14 +1198,6 @@ munmap_back:
goto free_vma;
}
/* We set VM_ACCOUNT in a shared mapping's vm_flags, to inform
* shmem_zero_setup (perhaps called through /dev/zero's ->mmap)
* that memory reservation must be checked; but that reservation
* belongs to shared memory object, not to vma: so now clear it.
*/
if ((vm_flags & (VM_SHARED|VM_ACCOUNT)) == (VM_SHARED|VM_ACCOUNT))
vma->vm_flags &= ~VM_ACCOUNT;
/* Can addr have changed??
*
* Answer: Yes, several device drivers can do it in their
@@ -1211,17 +1210,8 @@ munmap_back:
if (vma_wants_writenotify(vma))
vma->vm_page_prot = vm_get_page_prot(vm_flags & ~VM_SHARED);
if (file && vma_merge(mm, prev, addr, vma->vm_end,
vma->vm_flags, NULL, file, pgoff, vma_policy(vma))) {
mpol_put(vma_policy(vma));
kmem_cache_free(vm_area_cachep, vma);
fput(file);
if (vm_flags & VM_EXECUTABLE)
removed_exe_file_vma(mm);
} else {
vma_link(mm, vma, prev, rb_link, rb_parent);
file = vma->vm_file;
}
vma_link(mm, vma, prev, rb_link, rb_parent);
file = vma->vm_file;
/* Once vma denies write, undo our temporary denial count */
if (correct_wcount)
@@ -1468,7 +1458,7 @@ get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,
EXPORT_SYMBOL(get_unmapped_area);
/* Look up the first VMA which satisfies addr < vm_end, NULL if none. */
struct vm_area_struct * find_vma(struct mm_struct * mm, unsigned long addr)
struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
{
struct vm_area_struct *vma = NULL;
@@ -1511,7 +1501,7 @@ find_vma_prev(struct mm_struct *mm, unsigned long addr,
struct vm_area_struct **pprev)
{
struct vm_area_struct *vma = NULL, *prev = NULL;
struct rb_node * rb_node;
struct rb_node *rb_node;
if (!mm)
goto out;
@@ -1545,7 +1535,7 @@ out:
* update accounting. This is shared with both the
* grow-up and grow-down cases.
*/
static int acct_stack_growth(struct vm_area_struct * vma, unsigned long size, unsigned long grow)
static int acct_stack_growth(struct vm_area_struct *vma, unsigned long size, unsigned long grow)
{
struct mm_struct *mm = vma->vm_mm;
struct rlimit *rlim = current->signal->rlim;
@@ -1953,7 +1943,7 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len)
EXPORT_SYMBOL(do_munmap);
asmlinkage long sys_munmap(unsigned long addr, size_t len)
SYSCALL_DEFINE2(munmap, unsigned long, addr, size_t, len)
{
int ret;
struct mm_struct *mm = current->mm;
@@ -2095,6 +2085,9 @@ void exit_mmap(struct mm_struct *mm)
arch_exit_mmap(mm);
mmu_notifier_release(mm);
if (!mm->mmap) /* Can happen if dup_mmap() received an OOM */
return;
if (mm->locked_vm) {
vma = mm->mmap;
while (vma) {
@@ -2107,7 +2100,7 @@ void exit_mmap(struct mm_struct *mm)
lru_add_drain();
flush_cache_mm(mm);
tlb = tlb_gather_mmu(mm, 1);
/* Don't update_hiwater_rss(mm) here, do_exit already did */
/* update_hiwater_rss(mm) here? but nobody should be looking */
/* Use -1 here to ensure all VMAs in the mm are unmapped */
end = unmap_vmas(&tlb, vma, 0, -1, &nr_accounted, NULL);
vm_unacct_memory(nr_accounted);
@@ -2474,3 +2467,13 @@ void mm_drop_all_locks(struct mm_struct *mm)
mutex_unlock(&mm_all_locks_mutex);
}
/*
* initialise the VMA slab
*/
void __init mmap_init(void)
{
vm_area_cachep = kmem_cache_create("vm_area_struct",
sizeof(struct vm_area_struct), 0,
SLAB_PANIC, NULL);
}