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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ADF40C2BB55 for ; Thu, 16 Apr 2020 13:27:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8194C21D79 for ; Thu, 16 Apr 2020 13:27:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587043677; bh=SgUi9v3qfx+ZEKmvn57RABlzELq4LCU6Cuhf8IocIsA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=XN80zTF1qeyU4QsaViMRLz/g8YplsHvfOAlIL9uTLkFAjGF97MsNqcp12pUqWJ/h+ LM6sNjBiMdmFdvzn/kDi/K3oc5GIYJRNLXkB4bipdVpQ7t2jS4WnAq1Hzup8ewuIwz Zpl8+ArnC3tX2+sUS59RtcvpFu0M+dGiqtRo7gds= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2895622AbgDPN1x (ORCPT ); Thu, 16 Apr 2020 09:27:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:36456 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2895616AbgDPN1v (ORCPT ); Thu, 16 Apr 2020 09:27:51 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EA1E9206E9; Thu, 16 Apr 2020 13:27:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587043671; bh=SgUi9v3qfx+ZEKmvn57RABlzELq4LCU6Cuhf8IocIsA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mQtGi7T+SgKjOFhbSBv1Hfgn9QUELhfzwaYqRe5sRpez1KEGN1oRmXjVSQZnWinEz T7zxOCSzMwk49SIZdxJIFNn/xwG/2orkSpabjIfI2XHKZjiQeKFsiKxjcWWFG7TNSZ bcF5Waeog0Qcludl7d1TtdV3HgwxfKfbnJgqv41w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jaroslav Kysela , Takashi Iwai Subject: [PATCH 4.19 052/146] ALSA: hda: Fix potential access overflow in beep helper Date: Thu, 16 Apr 2020 15:23:13 +0200 Message-Id: <20200416131249.996626507@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200416131242.353444678@linuxfoundation.org> References: <20200416131242.353444678@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Takashi Iwai commit 0ad3f0b384d58f3bd1f4fb87d0af5b8f6866f41a upstream. The beep control helper function blindly stores the values in two stereo channels no matter whether the actual control is mono or stereo. This is practically harmless, but it annoys the recently introduced sanity check, resulting in an error when the checker is enabled. This patch corrects the behavior to store only on the defined array member. Fixes: 0401e8548eac ("ALSA: hda - Move beep helper functions to hda_beep.c") BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207139 Reviewed-by: Jaroslav Kysela Cc: Link: https://lore.kernel.org/r/20200407084402.25589-2-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/hda/hda_beep.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/sound/pci/hda/hda_beep.c +++ b/sound/pci/hda/hda_beep.c @@ -297,8 +297,12 @@ int snd_hda_mixer_amp_switch_get_beep(st { struct hda_codec *codec = snd_kcontrol_chip(kcontrol); struct hda_beep *beep = codec->beep; + int chs = get_amp_channels(kcontrol); + if (beep && (!beep->enabled || !ctl_has_mute(kcontrol))) { - ucontrol->value.integer.value[0] = + if (chs & 1) + ucontrol->value.integer.value[0] = beep->enabled; + if (chs & 2) ucontrol->value.integer.value[1] = beep->enabled; return 0; }