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mm: collapse security_vm_enough_memory() variants into a single function 

Collapse security_vm_enough_memory() variants into a single function.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: James Morris <jmorris@namei.org>
hifive-unleashed-5.1
Al Viro 2012-02-13 03:58:52 +00:00 committed by James Morris
parent bbd3656859
commit 191c542442
8 changed files with 10 additions and 38 deletions
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16
include/linux/security.h
View File

@ -1679,9 +1679,7 @@ int security_quotactl(int cmds, int type, int id, struct super_block *sb);
int security_quota_on(struct dentry *dentry);
int security_syslog(int type);
int security_settime(const struct timespec *ts, const struct timezone *tz);
int security_vm_enough_memory(long pages);
int security_vm_enough_memory_mm(struct mm_struct *mm, long pages);
int security_vm_enough_memory_kern(long pages);
int security_bprm_set_creds(struct linux_binprm *bprm);
int security_bprm_check(struct linux_binprm *bprm);
void security_bprm_committing_creds(struct linux_binprm *bprm);
@ -1902,25 +1900,11 @@ static inline int security_settime(const struct timespec *ts,
return cap_settime(ts, tz);
}
static inline int security_vm_enough_memory(long pages)
{
WARN_ON(current->mm == NULL);
return cap_vm_enough_memory(current->mm, pages);
}
static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
{
WARN_ON(mm == NULL);
return cap_vm_enough_memory(mm, pages);
}
static inline int security_vm_enough_memory_kern(long pages)
{
/* If current->mm is a kernel thread then we will pass NULL,
for this specific case that is fine */
return cap_vm_enough_memory(current->mm, pages);
}
static inline int security_bprm_set_creds(struct linux_binprm *bprm)
{
return cap_bprm_set_creds(bprm);

2
kernel/fork.c
View File

@ -355,7 +355,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
charge = 0;
if (mpnt->vm_flags & VM_ACCOUNT) {
unsigned int len = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;
if (security_vm_enough_memory(len))
if (security_vm_enough_memory_mm(oldmm, len)) /* sic */
goto fail_nomem;
charge = len;
}

4
mm/mmap.c
View File

@ -1235,7 +1235,7 @@ munmap_back:
*/
if (accountable_mapping(file, vm_flags)) {
charged = len >> PAGE_SHIFT;
if (security_vm_enough_memory(charged))
if (security_vm_enough_memory_mm(mm, charged))
return -ENOMEM;
vm_flags |= VM_ACCOUNT;
}
@ -2169,7 +2169,7 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
if (mm->map_count > sysctl_max_map_count)
return -ENOMEM;
if (security_vm_enough_memory(len >> PAGE_SHIFT))
if (security_vm_enough_memory_mm(mm, len >> PAGE_SHIFT))
return -ENOMEM;
/* Can we just expand an old private anonymous mapping? */

2
mm/mprotect.c
View File

@ -168,7 +168,7 @@ mprotect_fixup(struct vm_area_struct *vma, struct vm_area_struct **pprev,
if (!(oldflags & (VM_ACCOUNT|VM_WRITE|VM_HUGETLB|
VM_SHARED|VM_NORESERVE))) {
charged = nrpages;
if (security_vm_enough_memory(charged))
if (security_vm_enough_memory_mm(mm, charged))
return -ENOMEM;
newflags |= VM_ACCOUNT;
}

2
mm/mremap.c
View File

@ -329,7 +329,7 @@ static struct vm_area_struct *vma_to_resize(unsigned long addr,
if (vma->vm_flags & VM_ACCOUNT) {
unsigned long charged = (new_len - old_len) >> PAGE_SHIFT;
if (security_vm_enough_memory(charged))
if (security_vm_enough_memory_mm(mm, charged))
goto Efault;
*p = charged;
}

4
mm/shmem.c
View File

@ -127,7 +127,7 @@ static inline struct shmem_sb_info *SHMEM_SB(struct super_block *sb)
static inline int shmem_acct_size(unsigned long flags, loff_t size)
{
return (flags & VM_NORESERVE) ?
0 : security_vm_enough_memory_kern(VM_ACCT(size));
0 : security_vm_enough_memory_mm(current->mm, VM_ACCT(size));
}
static inline void shmem_unacct_size(unsigned long flags, loff_t size)
@ -145,7 +145,7 @@ static inline void shmem_unacct_size(unsigned long flags, loff_t size)
static inline int shmem_acct_block(unsigned long flags)
{
return (flags & VM_NORESERVE) ?
security_vm_enough_memory_kern(VM_ACCT(PAGE_CACHE_SIZE)) : 0;
security_vm_enough_memory_mm(current->mm, VM_ACCT(PAGE_CACHE_SIZE)) : 0;
}
static inline void shmem_unacct_blocks(unsigned long flags, long pages)

4
mm/swapfile.c
View File

@ -1563,6 +1563,8 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
BUG_ON(!current->mm);
pathname = getname(specialfile);
err = PTR_ERR(pathname);
if (IS_ERR(pathname))
@ -1590,7 +1592,7 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
spin_unlock(&swap_lock);
goto out_dput;
}
if (!security_vm_enough_memory(p->pages))
if (!security_vm_enough_memory_mm(current->mm, p->pages))
vm_unacct_memory(p->pages);
else {
err = -ENOMEM;

14
security/security.c
View File

@ -187,25 +187,11 @@ int security_settime(const struct timespec *ts, const struct timezone *tz)
return security_ops->settime(ts, tz);
}
int security_vm_enough_memory(long pages)
{
WARN_ON(current->mm == NULL);
return security_ops->vm_enough_memory(current->mm, pages);
}
int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
{
WARN_ON(mm == NULL);
return security_ops->vm_enough_memory(mm, pages);
}
int security_vm_enough_memory_kern(long pages)
{
/* If current->mm is a kernel thread then we will pass NULL,
for this specific case that is fine */
return security_ops->vm_enough_memory(current->mm, pages);
}
int security_bprm_set_creds(struct linux_binprm *bprm)
{
return security_ops->bprm_set_creds(bprm);