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memcontrol: fix potential null deref

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There was a potential null deref introduced in c62b1a3b31 ("memcg: use
generic percpu instead of private implementation").

Signed-off-by: Dan Carpenter <error27@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>
This commit is contained in:
Dan Carpenter 2010-03-23 13:35:12 -07:00 committed by Linus Torvalds
parent 9d34706f42
commit e7bbcdf374
1 changed files with 4 additions and 2 deletions
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6
mm/memcontrol.c
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@ -3691,8 +3691,10 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
else
mem = vmalloc(size);
if (mem)
memset(mem, 0, size);
if (!mem)
return NULL;
memset(mem, 0, size);
mem->stat = alloc_percpu(struct mem_cgroup_stat_cpu);
if (!mem->stat) {
if (size < PAGE_SIZE)