From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1F932611A for ; Sun, 28 May 2023 19:18:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1233C433D2; Sun, 28 May 2023 19:18:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1685301537; bh=93b3mrcIyExyeJtF850IPZ3PcVHhub6IU+SOlw8o600=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XpS9vgUQpMEh/oZQTN36b3vJM/jyD6RUkvxF2QkJZQIh8l3xxRG9EQeuMLESwdQLB R5jaczmU6tWguxBGRjvFw21zv3qwu0X5EbaDoiYMVlPBGwcLHgPVCS/ynxxR8/xCU/ RV8/YURJkR/ExhlnzX04Rwxzmm85HSXOpfUD5ODU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Olliver Schinagl , Takashi Iwai Subject: [PATCH 4.19 069/132] ALSA: hda: Fix Oops by 9.1 surround channel names Date: Sun, 28 May 2023 20:10:08 +0100 Message-Id: <20230528190835.654413932@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230528190833.565872088@linuxfoundation.org> References: <20230528190833.565872088@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Takashi Iwai commit 3b44ec8c5c44790a82f07e90db45643c762878c6 upstream. get_line_out_pfx() may trigger an Oops by overflowing the static array with more than 8 channels. This was reported for MacBookPro 12,1 with Cirrus codec. As a workaround, extend for the 9.1 channels and also fix the potential Oops by unifying the code paths accessing the same array with the proper size check. Reported-by: Olliver Schinagl Cc: Link: https://lore.kernel.org/r/64d95eb0-dbdb-cff8-a8b1-988dc22b24cd@schinagl.nl Link: https://lore.kernel.org/r/20230516184412.24078-1-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/hda/hda_generic.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) --- a/sound/pci/hda/hda_generic.c +++ b/sound/pci/hda/hda_generic.c @@ -1159,8 +1159,8 @@ static bool path_has_mixer(struct hda_co return path && path->ctls[ctl_type]; } -static const char * const channel_name[4] = { - "Front", "Surround", "CLFE", "Side" +static const char * const channel_name[] = { + "Front", "Surround", "CLFE", "Side", "Back", }; /* give some appropriate ctl name prefix for the given line out channel */ @@ -1186,7 +1186,7 @@ static const char *get_line_out_pfx(stru /* multi-io channels */ if (ch >= cfg->line_outs) - return channel_name[ch]; + goto fixed_name; switch (cfg->line_out_type) { case AUTO_PIN_SPEAKER_OUT: @@ -1238,6 +1238,7 @@ static const char *get_line_out_pfx(stru if (cfg->line_outs == 1 && !spec->multi_ios) return "Line Out"; + fixed_name: if (ch >= ARRAY_SIZE(channel_name)) { snd_BUG(); return "PCM";