From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756983AbbAGBwH (ORCPT ); Tue, 6 Jan 2015 20:52:07 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:46242 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756944AbbAGBwF (ORCPT ); Tue, 6 Jan 2015 20:52:05 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Takashi Iwai , Mimi Zohar Subject: [PATCH 3.18 47/84] KEYS: Fix stale key registration at error path Date: Tue, 6 Jan 2015 17:49:50 -0800 Message-Id: <20150107014030.540641224@linuxfoundation.org> X-Mailer: git-send-email 2.2.1 In-Reply-To: <20150107014029.012974975@linuxfoundation.org> References: <20150107014029.012974975@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.18-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 @@ -1017,10 +1017,13 @@ 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;