From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753743AbaDRJ0e (ORCPT ); Fri, 18 Apr 2014 05:26:34 -0400 Received: from ip4-83-240-18-248.cust.nbox.cz ([83.240.18.248]:46053 "EHLO ip4-83-240-18-248.cust.nbox.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752463AbaDRJWu (ORCPT ); Fri, 18 Apr 2014 05:22:50 -0400 From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Sasha Levin , "David S. Miller" , Jiri Slaby Subject: [PATCH 3.12 69/72] rds: prevent dereference of a NULL device in rds_iw_laddr_check Date: Fri, 18 Apr 2014 11:22:42 +0200 Message-Id: <64005923ffdefe53e87138ec472c88877196d405.1397812482.git.jslaby@suse.cz> X-Mailer: git-send-email 1.9.2 In-Reply-To: <3389f243c528afc7c7300c83b8f296290cd3656d.1397812482.git.jslaby@suse.cz> References: <3389f243c528afc7c7300c83b8f296290cd3656d.1397812482.git.jslaby@suse.cz> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sasha Levin 3.12-stable review patch. If anyone has any objections, please let me know. =============== [ Upstream commit bf39b4247b8799935ea91d90db250ab608a58e50 ] Binding might result in a NULL device which is later dereferenced without checking. Signed-off-by: Sasha Levin Signed-off-by: David S. Miller Signed-off-by: Jiri Slaby --- net/rds/iw.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/rds/iw.c b/net/rds/iw.c index 7826d46baa70..589935661d66 100644 --- a/net/rds/iw.c +++ b/net/rds/iw.c @@ -239,7 +239,8 @@ static int rds_iw_laddr_check(__be32 addr) ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin); /* due to this, we will claim to support IB devices unless we check node_type. */ - if (ret || cm_id->device->node_type != RDMA_NODE_RNIC) + if (ret || !cm_id->device || + cm_id->device->node_type != RDMA_NODE_RNIC) ret = -EADDRNOTAVAIL; rdsdebug("addr %pI4 ret %d node type %d\n", -- 1.9.2