diff options
| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-12-05 09:26:52 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-12-05 09:26:52 -0800 |
| commit | ad658cec232771b11e95bb5f0d639d48f898a1f2 (patch) | |
| tree | 7ef4ed87cbba8d8395f67c21af5c167d5de0293a /mm | |
| parent | 2a1292b36ba106b9b7f030d3fa130f5f634fd8f0 (diff) | |
| parent | 5a211a5deabcafdc764817d5b4510c767d317ddc (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6:
VM/Security: add security hook to do_brk
Security: round mmap hint address above mmap_min_addr
security: protect from stack expantion into low vm addresses
Security: allow capable check to permit mmap or low vm space
SELinux: detect dead booleans
SELinux: do not clear f_op when removing entries
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mmap.c | 11 | ||||
| -rw-r--r-- | mm/nommu.c | 3 |
2 files changed, 12 insertions, 2 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index acfc13f23ca..15678aa6ec7 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -912,6 +912,9 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr, if (!len) return -EINVAL; + if (!(flags & MAP_FIXED)) + addr = round_hint_to_min(addr); + error = arch_mmap_check(addr, len, flags); if (error) return error; @@ -1615,6 +1618,12 @@ static inline int expand_downwards(struct vm_area_struct *vma, */ if (unlikely(anon_vma_prepare(vma))) return -ENOMEM; + + address &= PAGE_MASK; + error = security_file_mmap(0, 0, 0, 0, address, 1); + if (error) + return error; + anon_vma_lock(vma); /* @@ -1622,8 +1631,6 @@ static inline int expand_downwards(struct vm_area_struct *vma, * is required to hold the mmap_sem in read mode. We need the * anon_vma lock to serialize against concurrent expand_stacks. */ - address &= PAGE_MASK; - error = 0; /* Somebody else might have raced and expanded it already */ if (address < vma->vm_start) { diff --git a/mm/nommu.c b/mm/nommu.c index 35622c59092..b989cb928a7 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -829,6 +829,9 @@ unsigned long do_mmap_pgoff(struct file *file, void *result; int ret; + if (!(flags & MAP_FIXED)) + addr = round_hint_to_min(addr); + /* decide whether we should attempt the mapping, and if so what sort of * mapping */ ret = validate_mmap_request(file, addr, len, prot, flags, pgoff, |