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 EBF4E408035; Fri, 4 Sep 2026 05:34:35 +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=1788500077; cv=none; b=KGSTBsylGFTO72xD1ZkWGl7XyeJLSFO6sOj0a5+pQ0xApSLdkdSl3JxBEnMPOTVtS7qUCMKeWgiiOnIyKmZsbrlkBf9gfAEfnwu7YHTKTUCbPVrYC9XU3oTPy3Uws++4xoY6UN4zUZqhVHflROXsgRMSPZejsGtr/XqONRTv+Cw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788500077; c=relaxed/simple; bh=HwdOaFXD9PjibIj7BmGIzSLGQLTm7+28lBdSLx1UzJU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ECJD0hD5qNJlPWFyksb5yALKiaE41pFoGx3fwM5tTzc39OHIAvqcw4ZLPkynwfa2nU9LIti9EZuKUveVndJxB0xk0KDUymPhSM6ENQ6OVWFoQSGorLR4ZUtQlbcXgmpCHM0JDbnaY2Y7d96HNn/t7t0YSrJnjwpUDxT4Crt4r+s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cEYP0kLO; 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="cEYP0kLO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E6D651F00A3D; Fri, 4 Sep 2026 05:34:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788500075; bh=TNh3dtUZlaI1eLOm0sbaR+u4Bmpqvf/kO7eeotOvF7o=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=cEYP0kLO7SEoQUtNrEtgv7nzQ4LYPXQ28js43592iL6NUG7/vVFLjXZw2etDUYMii mDuoqrPFZYWWO6Z5VOazJ0BjhqDy5NMfOSuOvZvHIwn+eVE8yIX26ihDGFjUzkMKLI LyKfnraVXqmV8pJnEULt41u78rA4ZWd/xhmv/Zkw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Takashi Iwai Subject: [PATCH 7.2 643/713] ALSA: portman2x4: Check card index validity at probe Date: Fri, 4 Sep 2026 07:00:11 +0200 Message-ID: <20260904045818.244420405@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260904045803.810145556@linuxfoundation.org> References: <20260904045803.810145556@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 7.2-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 @@ -697,6 +697,12 @@ 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])