diff options
| author | Eric Wheeler <git@linux.ewheeler.net> | 2016-03-07 15:17:50 -0800 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-04-18 08:49:25 -0400 |
| commit | 3629c42c9918a763d75786479f384a00324ec4f0 (patch) | |
| tree | 84e0a49fc2311b32e5693c721cc5b220c80a45f2 /drivers/md | |
| parent | 6af6167c3f1905018cde0262ceae7e07b70cb577 (diff) | |
bcache: fix cache_set_flush() NULL pointer dereference on OOM
[ Upstream commit f8b11260a445169989d01df75d35af0f56178f95 ]
When bch_cache_set_alloc() fails to kzalloc the cache_set, the
asyncronous closure handling tries to dereference a cache_set that
hadn't yet been allocated inside of cache_set_flush() which is called
by __cache_set_unregister() during cleanup. This appears to happen only
during an OOM condition on bcache_register.
Signed-off-by: Eric Wheeler <bcache@linux.ewheeler.net>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/bcache/super.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 2d0650defd37..2a102834c2ee 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1404,6 +1404,9 @@ static void cache_set_flush(struct closure *cl) struct btree *b; unsigned i; + if (!c) + closure_return(cl); + bch_cache_accounting_destroy(&c->accounting); kobject_put(&c->internal); |