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VM_GROWS{UP,DOWN} shouldn't be set on shmem VMAs
author
Al Viro
<viro@ZenIV.linux.org.uk>
Mon, 5 Mar 2012 06:39:47 +0000
(06:39 +0000)
committer
Linus Torvalds
<torvalds@linux-foundation.org>
Mon, 5 Mar 2012 21:51:32 +0000
(13:51 -0800)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/mmap.c
patch
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diff --git
a/mm/mmap.c
b/mm/mmap.c
index
3f758c7
..
22e1a0b
100644
(file)
--- a/
mm/mmap.c
+++ b/
mm/mmap.c
@@
-1293,6
+1293,8
@@
munmap_back:
pgoff = vma->vm_pgoff;
vm_flags = vma->vm_flags;
} else if (vm_flags & VM_SHARED) {
+ if (unlikely(vm_flags & (VM_GROWSDOWN|VM_GROWSUP)))
+ goto free_vma;
error = shmem_zero_setup(vma);
if (error)
goto free_vma;