From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754159AbbALSNA (ORCPT ); Mon, 12 Jan 2015 13:13:00 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:57740 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752469AbbALSGj (ORCPT ); Mon, 12 Jan 2015 13:06:39 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Takashi Iwai , Mimi Zohar , Luis Henriques Subject: [PATCH 3.16.y-ckt 095/216] KEYS: Fix stale key registration at error path Date: Mon, 12 Jan 2015 18:03:32 +0000 Message-Id: <1421085933-32536-96-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1421085933-32536-1-git-send-email-luis.henriques@canonical.com> References: <1421085933-32536-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.16 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.7-ckt4 -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: Luis Henriques --- security/keys/encrypted-keys/encrypted.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c index 5fe443d120af..556c43df6636 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; -- 2.1.4