From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Takashi Iwai , Mimi Zohar Subject: [PATCH 3.17 38/73] KEYS: Fix stale key registration at error path Date: Tue, 6 Jan 2015 18:15:59 -0800 Message-Id: <20150107021558.673481755@linuxfoundation.org> In-Reply-To: <20150107021557.521276020@linuxfoundation.org> References: <20150107021557.521276020@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Takashi Iwai 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 --- security/keys/encrypted-keys/encrypted.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- 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;