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-rw-r--r--fs/crypto/keyring.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/crypto/keyring.c b/fs/crypto/keyring.c
index bb15709ac9a4..13d336a6cc5d 100644
--- a/fs/crypto/keyring.c
+++ b/fs/crypto/keyring.c
@@ -92,6 +92,8 @@ void fscrypt_put_master_key_activeref(struct super_block *sb,
* destroying any subkeys embedded in it.
*/
+ if (WARN_ON(!sb->s_master_keys))
+ return;
spin_lock(&sb->s_master_keys->lock);
hlist_del_rcu(&mk->mk_node);
spin_unlock(&sb->s_master_keys->lock);