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authorHugh Dickins <hugh@veritas.com>2007-10-22 20:45:12 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-23 08:32:06 -0700
commit1ddd439ef987c9f0209e6ce824b67518f2afe67b (patch)
tree1f6e0ef40c2b9cf5819d9193d7d06c6a0a33ff6c /mm/mprotect.c
parent4ae3f847e49e3787eca91bced31f8fd328d50496 (diff)
downloadvexpress-lsk-1ddd439ef987c9f0209e6ce824b67518f2afe67b.tar.gz
fix mprotect vma_wants_writenotify prot
Fix mprotect bug in recent commit 3ed75eb8f1cd89565966599c4f77d2edb086d5b0 (setup vma->vm_page_prot by vm_get_page_prot()): the vma_wants_writenotify case was setting the same prot as when not. Nothing wrong with the use of protection_map[] in mmap_region(), but use vm_get_page_prot() there too in the same ~VM_SHARED way. Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Coly Li <coyli@suse.de> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mprotect.c')
-rw-r--r--mm/mprotect.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 55227845abb..4de546899dc 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -194,7 +194,7 @@ success:
vma->vm_flags = newflags;
vma->vm_page_prot = vm_get_page_prot(newflags);
if (vma_wants_writenotify(vma)) {
- vma->vm_page_prot = vm_get_page_prot(newflags);
+ vma->vm_page_prot = vm_get_page_prot(newflags & ~VM_SHARED);
dirty_accountable = 1;
}