Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756251AbdGCO1d (ORCPT ); Mon, 3 Jul 2017 10:27:33 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:36440 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932704AbdGCNnu (ORCPT ); Mon, 3 Jul 2017 09:43:50 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Colin Ian King , "David S. Miller" , Sasha Levin Subject: [PATCH 4.9 084/172] net: sctp: fix array overrun read on sctp_timer_tbl Date: Mon, 3 Jul 2017 15:34:24 +0200 Message-Id: <20170703133418.222309799@linuxfoundation.org> X-Mailer: git-send-email 2.13.2 In-Reply-To: <20170703133414.260777365@linuxfoundation.org> References: <20170703133414.260777365@linuxfoundation.org> User-Agent: quilt/0.65 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 Content-Length: 1144 Lines: 36 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Colin Ian King [ Upstream commit 0e73fc9a56f22f2eec4d2b2910c649f7af67b74d ] The comparison on the timeout can lead to an array overrun read on sctp_timer_tbl because of an off-by-one error. Fix this by using < instead of <= and also compare to the array size rather than SCTP_EVENT_TIMEOUT_MAX. Fixes CoverityScan CID#1397639 ("Out-of-bounds read") Signed-off-by: Colin Ian King Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- net/sctp/debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/sctp/debug.c +++ b/net/sctp/debug.c @@ -166,7 +166,7 @@ static const char *const sctp_timer_tbl[ /* Lookup timer debug name. */ const char *sctp_tname(const sctp_subtype_t id) { - if (id.timeout <= SCTP_EVENT_TIMEOUT_MAX) + if (id.timeout < ARRAY_SIZE(sctp_timer_tbl)) return sctp_timer_tbl[id.timeout]; return "unknown_timer"; }