From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 1585C2FFDEA; Sat, 12 Sep 2026 13:49:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789220952; cv=none; b=pEABgVthu/b+LSM9W3G7joYhkVRWxUpk2OIOXm7sRmvpo2NNOUeSq2p5llRB78d862vO8sanPRjl/8HVz3eKUiGJRc4N8UqUlXvm+xQq3GgWrRBIsnokvC4lWlQbnQ7oQ1HObd3GYAHJZblCFWH5ksxrhZHCVo5qttbiJMp367U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789220952; c=relaxed/simple; bh=s2/0dqXYGSWSvcLm1nprckOnv8gEs2Y8S393TlTU36g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WXnYEp3BVT1CqKYptdUTs1vsjT87o9XhbZUc4EQVg7653p4LAFIwRKhinSVXIAN5BNRHX5PnYAN7G91lz+ApUW8n8EIQzlDsWyQZ+gf+I9dRkwtb3FpoaWLuBQfkhxsJK/hhZbdt9A2bHusVuJ23yLZv90WZfc06lMfErSQa9AU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=VN9DUpsf; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="VN9DUpsf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7AECD1F000FF; Sat, 12 Sep 2026 13:49:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789220950; bh=naPYaS8piSBbdRrDybtUYKc1xHz/esJBTdTLdeG+bGc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=VN9DUpsfL0XUS60eMwHUKL5ZA9Od+elStU3JvRFU87jfIkmoyU4h2WGwcTdbyc2ww t9WklikCCS9mbAJV83liJy/Hicomm+skQiwhXE1ZlzOfR1JD+soYcTC7JUQyNIWvFa wrqx5L9/AdjZYfQxD/LFBlUUiHNU8JuxEYTibq4g= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Takashi Iwai Subject: [PATCH 6.6 0282/1424] ALSA: portman2x4: Check card index validity at probe Date: Sat, 12 Sep 2026 08:45:14 +0200 Message-ID: <20260912065613.598305877@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.279695368@linuxfoundation.org> References: <20260912065607.279695368@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Takashi Iwai commit 3690ef20469d5959378260e2752f2314a2572913 upstream. Although portman2x4 driver has a check of the given devptr->id value, it doesn't check for a negative id, which is often given as "none" or such value when bound via sysfs. This may lead to OOB access for index[] and other parameters. Add a sanity check for the card index and warn/correct it if it's a value out of the range. Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20260806153227.1460166-7-tiwai@suse.de Signed-off-by: Greg Kroah-Hartman --- sound/drivers/portman2x4.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/sound/drivers/portman2x4.c +++ b/sound/drivers/portman2x4.c @@ -705,6 +705,12 @@ static int snd_portman_probe(struct plat p = platform_get_drvdata(pdev); platform_set_drvdata(pdev, NULL); + if (dev < 0) { + dev_warn(&pdev->dev, + "Invalid card index %d, using default 0\n", dev); + dev = 0; + } + if (dev >= SNDRV_CARDS) return -ENODEV; if (!enable[dev])