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 9735AC2BB55 for ; Thu, 16 Apr 2020 14:20:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 681ED2076D for ; Thu, 16 Apr 2020 14:20:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587046841; bh=Ccx5IMb0hrnaC5537dtoCxBIqyonxRrmjubp0SWGv5o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CKx2j49v+GuKpfinw1WaNAL6xL3FitnGAnGSAnyiPHMF8g+RwZhunnOtrlQ+tVHSL T6jOnCJzeLT7VRnunXxWgt274p65AWBIBaVsD13ZTRGYYJ0HzvznawTkkbkrhpOVFc ZXGlwQNVYTTT8hKf7d8/K9JIM0yBGl3IZxJesFRw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732314AbgDPOUj (ORCPT ); Thu, 16 Apr 2020 10:20:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:41452 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728063AbgDPNyw (ORCPT ); Thu, 16 Apr 2020 09:54:52 -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 367C920732; Thu, 16 Apr 2020 13:54:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587045290; bh=Ccx5IMb0hrnaC5537dtoCxBIqyonxRrmjubp0SWGv5o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=em+kzqvSXmiRchnAoOWXBoycz+i39eiN7VfCS//D+D67n3oy0kf4bFMuc1FoGsqzD KIRX2+qlzJTCahiESF2p+miNvoCtXnNxLaRVoKjIWINyhwvex1krzjt24nXhLKbxsP aQaC1gryRCeb9iWVPtYhVKdUtt7tn9eJIdCoz6V8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jaroslav Kysela , Takashi Iwai Subject: [PATCH 5.6 074/254] ALSA: hda: Fix potential access overflow in beep helper Date: Thu, 16 Apr 2020 15:22:43 +0200 Message-Id: <20200416131335.141789732@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200416131325.804095985@linuxfoundation.org> References: <20200416131325.804095985@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 @@ -290,8 +290,12 @@ 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; }