From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752816AbcFEKsF (ORCPT ); Sun, 5 Jun 2016 06:48:05 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:21807 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752295AbcFEKWH (ORCPT ); Sun, 5 Jun 2016 06:22:07 -0400 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kangjie Lu , Kangjie Lu , "David S . Miller" , Willy Tarreau Subject: [PATCH 3.10 126/143] net: fix infoleak in llc Date: Sun, 5 Jun 2016 12:20:29 +0200 Message-Id: <1465122046-9645-127-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1465122046-9645-1-git-send-email-w@1wt.eu> References: <1465122046-9645-1-git-send-email-w@1wt.eu> MIME-Version: 1.0 Content-Type: text/plain; charset=latin1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kangjie Lu commit b8670c09f37bdf2847cc44f36511a53afc6161fd upstream. The stack object “info” has a total size of 12 bytes. Its last byte is padding which is not initialized and leaked via “put_cmsg”. Signed-off-by: Kangjie Lu Signed-off-by: David S. Miller Signed-off-by: Willy Tarreau --- net/llc/af_llc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c index c3ee805..9d14059 100644 --- a/net/llc/af_llc.c +++ b/net/llc/af_llc.c @@ -626,6 +626,7 @@ static void llc_cmsg_rcv(struct msghdr *msg, struct sk_buff *skb) if (llc->cmsg_flags & LLC_CMSG_PKTINFO) { struct llc_pktinfo info; + memset(&info, 0, sizeof(info)); info.lpi_ifindex = llc_sk(skb->sk)->dev->ifindex; llc_pdu_decode_dsap(skb, &info.lpi_sap); llc_pdu_decode_da(skb, info.lpi_mac); -- 2.8.0.rc2.1.gbe9624a