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authorJohannes Weiner <hannes@cmpxchg.org>2009-04-30 15:08:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-05-02 15:36:09 -0700
commitbc43f75cd9815833b27831600ccade672edb5e43 (patch)
tree87ded2ff291b63259ac3df846a09d8348174f636 /fs/autofs4
parent53951bd57dfe2da58f86cdf276719082d80d8485 (diff)
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mm: fix pageref leak in do_swap_page()
By the time the memory cgroup code is notified about a swapin we already hold a reference on the fault page. If the cgroup callback fails make sure to unlock AND release the page reference which was taken by lookup_swap_cach(), or we leak the reference. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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