Commit fa4d683a authored by Wei Yongjun's avatar Wei Yongjun Committed by Alasdair G Kergon

dm cache: fix error return code in cache_create

Return -ENOMEM if memory allocation fails in cache_create
instead of 0 (to avoid NULL pointer dereference).
Signed-off-by: default avatarWei Yongjun <yongjun_wei@trendmicro.com.cn>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent d793e684
...@@ -1971,6 +1971,7 @@ static int cache_create(struct cache_args *ca, struct cache **result) ...@@ -1971,6 +1971,7 @@ static int cache_create(struct cache_args *ca, struct cache **result)
atomic_set(&cache->nr_migrations, 0); atomic_set(&cache->nr_migrations, 0);
init_waitqueue_head(&cache->migration_wait); init_waitqueue_head(&cache->migration_wait);
r = -ENOMEM;
cache->nr_dirty = 0; cache->nr_dirty = 0;
cache->dirty_bitset = alloc_bitset(from_cblock(cache->cache_size)); cache->dirty_bitset = alloc_bitset(from_cblock(cache->cache_size));
if (!cache->dirty_bitset) { if (!cache->dirty_bitset) {
......
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