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,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 1DBD8C3A5A0 for ; Sat, 18 Apr 2020 14:53:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0FA1206D6 for ; Sat, 18 Apr 2020 14:53:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587221621; bh=XlFxx7w9tq9hPc8Jl4nJlyASCZqXKW6voGb0AIZjCWM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=sJ3n+NaBGROplZWxhMb3SdY90gy0HKN/WOVV6TRF21UKgKmNhqmmx0Gl9WF5h8Q4e iV43SPEZv+HMwNKcVzh3am/n2JTCt9/mS/t1mMpXzvAvPUNXOIJOdiTERb8anCXEvP hmN8MAzpTAKYWNdVUpG1PCq3r0VTGDnymZg37Xk8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728189AbgDROlz (ORCPT ); Sat, 18 Apr 2020 10:41:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:51584 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728154AbgDROlz (ORCPT ); Sat, 18 Apr 2020 10:41:55 -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 A278321D7E; Sat, 18 Apr 2020 14:41:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587220915; bh=XlFxx7w9tq9hPc8Jl4nJlyASCZqXKW6voGb0AIZjCWM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PaKFNRa+9QdR82IZFrmf/1EIBmqxhcXNZG7rR8I1BYGUJLiVBrrnfWQ7Ubh3JNz5R vTiClzRFrAfdYucPLZiPdsnDk67LEfrS6/aFFHCUKKlHyYKfYrtARQ18PgUdxmDnSX wFifpXoIt6MB8QWGfMqBct1tXns93xlQ847VVFZU= 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 5.4 54/78] ALSA: hda: Fix potential access overflow in beep helper Date: Sat, 18 Apr 2020 10:40:23 -0400 Message-Id: <20200418144047.9013-54-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200418144047.9013-1-sashal@kernel.org> References: <20200418144047.9013-1-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 b7d9160ed8688..c6e1e03a5e4da 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