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authorKirill Tkhai <ktkhai@virtuozzo.com>2017-10-03 16:14:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-10-03 17:54:23 -0700
commit4b22927f0cbd58303aac689e378d20bf56267a39 (patch)
treec62d33d5689dda2c2f0bcb259f13e0c99dd89ada /README
parentfa87b91c94a8fd2c8502b6761be2d08a8e9bcf55 (diff)
ksm: fix unlocked iteration over vmas in cmp_and_merge_page()
In this place mm is unlocked, so vmas or list may change. Down read mmap_sem to protect them from modifications. Link: http://lkml.kernel.org/r/150512788393.10691.8868381099691121308.stgit@localhost.localdomain Fixes: e86c59b1b12d ("mm/ksm: improve deduplication of zero pages with colouring") Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Minchan Kim <minchan@kernel.org> Cc: zhong jiang <zhongjiang@huawei.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'README')
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