dm cache: destroy migration_cache if cache target registration failed
Commit 7e6358d244e47 ("dm: fix various targets to dm_register_target
after module __init resources created") inadvertently introduced this
bug when it moved dm_register_target() after the call to KMEM_CACHE().
Fixes: 7e6358d244e47 ("dm: fix various targets to dm_register_target after module __init resources created")
Cc: stable@vger.kernel.org
Signed-off-by: Shenghui Wang <shhuiw@foxmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index e13d991..b29a832 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -3484,14 +3484,13 @@
int r;
migration_cache = KMEM_CACHE(dm_cache_migration, 0);
- if (!migration_cache) {
- dm_unregister_target(&cache_target);
+ if (!migration_cache)
return -ENOMEM;
- }
r = dm_register_target(&cache_target);
if (r) {
DMERR("cache target registration failed: %d", r);
+ kmem_cache_destroy(migration_cache);
return r;
}
