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| author | Hugh Dickins <hugh@veritas.com> | 2007-02-10 01:43:00 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-11 10:51:17 -0800 |
| commit | c3704ceb4ad055b489b143f4e37c57d128908012 (patch) | |
| tree | 730892c9d4d9dbab03c77597e822a7cb79c9cd96 /mm/page_alloc.c | |
| parent | f05b6284ee5d3be51ebe22284fc4b25fc586f380 (diff) | |
| download | op-kernel-dev-c3704ceb4ad055b489b143f4e37c57d128908012.zip op-kernel-dev-c3704ceb4ad055b489b143f4e37c57d128908012.tar.gz | |
[PATCH] page_mkwrite caller race fix
After do_wp_page has tested page_mkwrite, it must release old_page after
acquiring page table lock, not before: at some stage that ordering got
reversed, leaving a (very unlikely) window in which old_page might be
truncated, freed, and reused in the same position.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Acked-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
0 files changed, 0 insertions, 0 deletions
