Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756591Ab1DLOhj (ORCPT ); Tue, 12 Apr 2011 10:37:39 -0400 Received: from kroah.org ([198.145.64.141]:57371 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756812Ab1DLOhd (ORCPT ); Tue, 12 Apr 2011 10:37:33 -0400 X-Mailbox-Line: From gregkh@clark.kroah.org Tue Apr 12 07:35:48 2011 Message-Id: <20110412143548.900956204@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Tue, 12 Apr 2011 07:33:58 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Dan Rosenberg , Takashi Iwai Subject: [009/105] sound/oss/opl3: validate voice and channel indexes In-Reply-To: <20110412143613.GA19478@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1594 Lines: 58 2.6.38-stable review patch. If anyone has any objections, please let us know. ------------------ From: Dan Rosenberg commit 4d00135a680727f6c3be78f8befaac009030e4df upstream. User-controllable indexes for voice and channel values may cause reading and writing beyond the bounds of their respective arrays, leading to potentially exploitable memory corruption. Validate these indexes. Signed-off-by: Dan Rosenberg Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/oss/opl3.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) --- a/sound/oss/opl3.c +++ b/sound/oss/opl3.c @@ -849,6 +849,10 @@ static int opl3_load_patch(int dev, int static void opl3_panning(int dev, int voice, int value) { + + if (voice < 0 || voice >= devc->nr_voice) + return; + devc->voc[voice].panning = value; } @@ -1066,8 +1070,15 @@ static int opl3_alloc_voice(int dev, int static void opl3_setup_voice(int dev, int voice, int chn) { - struct channel_info *info = - &synth_devs[dev]->chn_info[chn]; + struct channel_info *info; + + if (voice < 0 || voice >= devc->nr_voice) + return; + + if (chn < 0 || chn > 15) + return; + + info = &synth_devs[dev]->chn_info[chn]; opl3_set_instr(dev, voice, info->pgm_num); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/