diff options
| author | Andrew Morton <akpm@osdl.org> | 2006-09-08 12:48:38 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-08 13:22:50 -0400 |
| commit | 016eb4a0ed06a3677d67a584da901f0e9a63c666 (patch) | |
| tree | 574ead6bd03d31ca7036ff2389cb0400f3fd63fc /Documentation/DMA-mapping.txt | |
| parent | 3665d0e58fa44f50c744f85c7e8ad21d5b10e206 (diff) | |
[PATCH] invalidate_complete_page() race fix
If a CPU faults this page into pagetables after invalidate_mapping_pages()
checked page_mapped(), invalidate_complete_page() will still proceed to remove
the page from pagecache. This leaves the page-faulting process with a
detached page. If it was MAP_SHARED then file data loss will ensue.
Fix that up by checking the page's refcount after taking tree_lock.
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/DMA-mapping.txt')
0 files changed, 0 insertions, 0 deletions