4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shenghui Wang <shhuiw@xxxxxxxxxxx>
commit c7cd55504a5b0fc826a2cd9540845979d24ae542 upstream.
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@xxxxxxxxxxxxxxx
Signed-off-by: Shenghui Wang <shhuiw@xxxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-cache-target.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -3492,14 +3492,13 @@ static int __init dm_cache_init(void)
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;
}
