diff options
| author |   Vladimir Davydov <vdavydov@virtuozzo.com> | 2016-05-23 16:22:29 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-23 17:04:14 -0700 |
| commit | 1383399d7be029281997889df23150fa6c16be6e (patch) | |
| tree | 9cdc21abe7297912673a4d540b50d45c932603f6 /mm | |
| parent | ELF/MIPS build fix (diff) | |
| download | wireguard-linux-1383399d7be029281997889df23150fa6c16be6e.tar.xz wireguard-linux-1383399d7be029281997889df23150fa6c16be6e.zip | |
mm: memcontrol: fix possible css ref leak on oom
mem_cgroup_oom may be invoked multiple times while a process is handling
a page fault, in which case current->memcg_in_oom will be overwritten
leaking the previously taken css reference.
Link: http://lkml.kernel.org/r/1464019330-7579-1-git-send-email-vdavydov@virtuozzo.com
Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index b3f16ab4b431..cf428d7b9a03 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1604,7 +1604,7 @@ static void memcg_oom_recover(struct mem_cgroup *memcg) static void mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int order) { - if (!current->memcg_may_oom) + if (!current->memcg_may_oom || current->memcg_in_oom) return; /* * We are in the middle of the charge context here, so we |