3.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
commit fa4d683af3693863bec761e2761a07e4c1351f86 upstream.
Return -ENOMEM if memory allocation fails in cache_create
instead of 0 (to avoid NULL pointer dereference).
Signed-off-by: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-cache-target.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -1971,6 +1971,7 @@ static int cache_create(struct cache_arg
atomic_set(&cache->nr_migrations, 0);
init_waitqueue_head(&cache->migration_wait);
+ r = -ENOMEM;
cache->nr_dirty = 0;
cache->dirty_bitset = alloc_bitset(from_cblock(cache->cache_size));
if (!cache->dirty_bitset) {
--
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