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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 E78EAC3A5A9 for ; Sat, 18 Apr 2020 13:50:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BDEDC214AF for ; Sat, 18 Apr 2020 13:50:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587217819; bh=YJIxCNr0UP8TqTCKe4sYeYk4yVVj08ql7ZOB7G577O8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=VVIidwupKbju5EUmpTo9sK0c66sRhhR0hJhXQBifDQnvoRXI7kP/bnF+fjOXQyw5G hggdiEa5cPNjFtfboBIGBhkQ39zKFXkRXYbshKuXMMFLF6mZZrVrITjZQ+s/TbDe/l Hdfy4q5al7JlQdVJQns3IY7k0rtpRvr/RtRL+myg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726838AbgDRNtf (ORCPT ); Sat, 18 Apr 2020 09:49:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:56616 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726834AbgDRNte (ORCPT ); Sat, 18 Apr 2020 09:49:34 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B44BD214AF; Sat, 18 Apr 2020 13:49:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587217774; bh=YJIxCNr0UP8TqTCKe4sYeYk4yVVj08ql7ZOB7G577O8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WFu4uq1l0WUs8qkFekn7QVgDH5h9g1DU7oXudUItyXvxPxTIDB31g3SRsPEYlR3Vy yiKXlUoyxfzBp9ptbzP2Z6/rbshhVOcfhI+9c5NSv+E7EX+gpnDuX4wDmjc17eVO92 AQUlCguPMWfLO8lsgRTrtHJAkewvYFpL1MRp0QHU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Takashi Iwai , Jaroslav Kysela , Sasha Levin , alsa-devel@alsa-project.org Subject: [PATCH AUTOSEL 5.6 63/73] ALSA: hda: Fix potential access overflow in beep helper Date: Sat, 18 Apr 2020 09:48:05 -0400 Message-Id: <20200418134815.6519-63-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200418134815.6519-1-sashal@kernel.org> References: <20200418134815.6519-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Takashi Iwai [ Upstream commit 0ad3f0b384d58f3bd1f4fb87d0af5b8f6866f41a ] 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: Sasha Levin --- sound/pci/hda/hda_beep.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/hda_beep.c b/sound/pci/hda/hda_beep.c index f5fd62ed4df5b..841523f6b88de 100644 --- a/sound/pci/hda/hda_beep.c +++ b/sound/pci/hda/hda_beep.c @@ -290,8 +290,12 @@ int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol, { 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; } -- 2.20.1