From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753817AbbLIJic (ORCPT ); Wed, 9 Dec 2015 04:38:32 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:44929 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753624AbbLIJiZ (ORCPT ); Wed, 9 Dec 2015 04:38:25 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Dan Carpenter , "David S. Miller" , Luis Henriques Subject: [PATCH 3.16.y-ckt 001/126] irda: precedence bug in irlmp_seq_hb_idx() Date: Wed, 9 Dec 2015 09:36:11 +0000 Message-Id: <1449653896-5236-2-git-send-email-luis.henriques@canonical.com> In-Reply-To: <1449653896-5236-1-git-send-email-luis.henriques@canonical.com> References: <1449653896-5236-1-git-send-email-luis.henriques@canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Extended-Stable: 3.16 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.7-ckt21 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter commit 50010c20597d14667eff0fdb628309986f195230 upstream. This is decrementing the pointer, instead of the value stored in the pointer. KASan detects it as an out of bounds reference. Reported-by: "Berry Cheng 程君(成淼)" Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller Signed-off-by: Luis Henriques --- net/irda/irlmp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/irda/irlmp.c b/net/irda/irlmp.c index 98ad6ec4bd3c..8ad149478e19 100644 --- a/net/irda/irlmp.c +++ b/net/irda/irlmp.c @@ -1876,7 +1876,7 @@ static void *irlmp_seq_hb_idx(struct irlmp_iter_state *iter, loff_t *off) for (element = hashbin_get_first(iter->hashbin); element != NULL; element = hashbin_get_next(iter->hashbin)) { - if (!off || *off-- == 0) { + if (!off || (*off)-- == 0) { /* NB: hashbin left locked */ return element; }