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| author | Dan Carpenter <error27@gmail.com> | 2010-03-23 13:35:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-24 16:31:19 -0700 |
| commit | e7bbcdf3747e3919c31cfa87853c69d178bce548 (patch) | |
| tree | 42493b615337a170f3a019fc41dd90c4d4d9b342 | |
| parent | 9d34706f42f9b8c15185423d9af98d37ba21d011 (diff) | |
| download | linux-3.10-e7bbcdf3747e3919c31cfa87853c69d178bce548.tar.gz linux-3.10-e7bbcdf3747e3919c31cfa87853c69d178bce548.tar.bz2 linux-3.10-e7bbcdf3747e3919c31cfa87853c69d178bce548.zip | |
memcontrol: fix potential null deref
There was a potential null deref introduced in c62b1a3b31b5 ("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>
| -rw-r--r-- | mm/memcontrol.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 00dda352144..9ed760dc744 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -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) |