2df66e9a20cdb8fac10a1979c6b678e98ee67f0a
parent c61284e99191b2284fb74dae6961d4d09e4e59e8
author Nick Piggin <npiggin@suse.de> 1279657465 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1279668340 -0700

mm/vmscan.c: fix mapping use after free

We need lock_page_nosync() here because we have no reference to the
mapping when taking the page lock.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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