From: Takashi Iwai Date: Thu, 4 Dec 2014 17:25:19 +0000 (+0100) Subject: KEYS: Fix stale key registration at error path X-Git-Tag: firefly_0821_release~3679^2~1047 X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=18b41bd86e6cdcdc3b4cef920a1f3d6f496634e3;p=firefly-linux-kernel-4.4.55.git KEYS: Fix stale key registration at error path commit b26bdde5bb27f3f900e25a95e33a0c476c8c2c48 upstream. When loading encrypted-keys module, if the last check of aes_get_sizes() in init_encrypted() fails, the driver just returns an error without unregistering its key type. This results in the stale entry in the list. In addition to memory leaks, this leads to a kernel crash when registering a new key type later. This patch fixes the problem by swapping the calls of aes_get_sizes() and register_key_type(), and releasing resources properly at the error paths. Bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=908163 Signed-off-by: Takashi Iwai Signed-off-by: Mimi Zohar Signed-off-by: Greg Kroah-Hartman --- diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c index 9e1e005c7596..c4c8df4b214d 100644 --- a/security/keys/encrypted-keys/encrypted.c +++ b/security/keys/encrypted-keys/encrypted.c @@ -1018,10 +1018,13 @@ static int __init init_encrypted(void) ret = encrypted_shash_alloc(); if (ret < 0) return ret; + ret = aes_get_sizes(); + if (ret < 0) + goto out; ret = register_key_type(&key_type_encrypted); if (ret < 0) goto out; - return aes_get_sizes(); + return 0; out: encrypted_shash_release(); return ret;