From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F86AC6FA89 for ; Wed, 14 Sep 2022 09:06:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231180AbiINJGA (ORCPT ); Wed, 14 Sep 2022 05:06:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48686 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229993AbiINJE6 (ORCPT ); Wed, 14 Sep 2022 05:04:58 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 58D8B786D2; Wed, 14 Sep 2022 02:03:01 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 36A5FB81675; Wed, 14 Sep 2022 09:02:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 54654C433D7; Wed, 14 Sep 2022 09:02:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663146178; bh=DJM3CoZYpCVzX8l096vek1rNTFNHFKWn2oEvcTzk1Vs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bqGYRGQklt+VtROx5CbevZalq4pcVTlrri0p+cBrihyDMfHtMucL5erZGF0Ag72RV 4rnrrXQVJHzCiT2itQwmK5+lPcLBAvMiFUfbs6M2k4VtkGE7UAtihNhcfuKNyQTSQj n7Ht/XYE3HeV08lTmCjeuyMjwpbE6aLrf+D1g4vqn6mz+jokjQZHtC3+onCjuZ3Ct5 vbxCcIrn0v5Xe24AYvWQPFr1hO4CN+96OQ4t4pynvNPJO0gfWzHPHTUJQmJp+hHQMg 6XLHWPjngIBLJMSgoj9I2MoZ3EZVccvCFKlZL6oGASsPupr4+CdN+OAYA2oay8hROl 4hzMBOu8dElJQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dongxiang Ke , Takashi Iwai , Sasha Levin , perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org Subject: [PATCH AUTOSEL 5.15 10/16] ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface() Date: Wed, 14 Sep 2022 05:02:18 -0400 Message-Id: <20220914090224.470913-10-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220914090224.470913-1-sashal@kernel.org> References: <20220914090224.470913-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dongxiang Ke [ Upstream commit e53f47f6c1a56d2af728909f1cb894da6b43d9bf ] There may be a bad USB audio device with a USB ID of (0x04fa, 0x4201) and the number of it's interfaces less than 4, an out-of-bounds read bug occurs when parsing the interface descriptor for this device. Fix this by checking the number of interfaces. Signed-off-by: Dongxiang Ke Link: https://lore.kernel.org/r/20220906024928.10951-1-kdx.glider@gmail.com Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/usb/stream.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/usb/stream.c b/sound/usb/stream.c index ceb93d798182c..40ce8a1cb318a 100644 --- a/sound/usb/stream.c +++ b/sound/usb/stream.c @@ -1105,7 +1105,7 @@ static int __snd_usb_parse_audio_interface(struct snd_usb_audio *chip, * Dallas DS4201 workaround: It presents 5 altsettings, but the last * one misses syncpipe, and does not produce any sound. */ - if (chip->usb_id == USB_ID(0x04fa, 0x4201)) + if (chip->usb_id == USB_ID(0x04fa, 0x4201) && num >= 4) num = 4; for (i = 0; i < num; i++) { -- 2.35.1