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dm cache: destroy migration_cache if cache target registration failed

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commit c7cd55504a upstream.

Commit 7e6358d244 ("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: 7e6358d244 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shenghui Wang
2018-10-07 14:45:41 +08:00
committed by Greg Kroah-Hartman
parent 8d2f62cb2d
commit 6c8faa19e9
1 changed files with 2 additions and 3 deletions
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5
drivers/md/dm-cache-target.c
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@@ -3571,14 +3571,13 @@ 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;
}