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 054D2566C5B; Wed, 9 Sep 2026 14:05:23 +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=1788962724; cv=none; b=CFHOH/jfaB2gP6J6OWx5yupzGMIYL5Pn5IMS+mTBT7weIUVarcsv8RQ4o2NDHmFwQIJOxDw2xsOyXSALr3qbLRvmmLSg3X7PkFIn9kXYS7SIpM1M6RjrveF+rXZVis8Zz2TcRBi5hVs5+e36ujfWtC5JbekeQvgq3YXjjM8a2lE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788962724; c=relaxed/simple; bh=ksF0vM8wVIjPLOpLg4gYZacppoaLykxLl1mdDmerB7M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IQsoZ5QJnQSY7NsIpVPsgzH/5CiW9gmezEg/BN6G1AZFb8Kn7EogxRLU9idqKhQ+GLFeGYvOP43oO50fPEH6UeAO1emAWqntRyYW4r0Uh7/CrOhs3rK0jydF0g4ZR/iAug1aSs41TcwQlRAehDVcDrEpKP3ZkjAgZp3A07pM+Rk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Wqw4iw4T; 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="Wqw4iw4T" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F0881F00A3A; Wed, 9 Sep 2026 14:05:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788962722; bh=XV7ir84R3sXDoTxgh0+s+Iussvk8Qh7+QYxd6EZd6eM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Wqw4iw4T3CamgqN/nS/V3gTozu+Z6KkfyOvbm5Ej5Lp8TAOd9qrEdBjW9ODW921eB nahffHuPZAnlZwxtiMU2KYWtS6enlTak3BiM5Q7g6S4u+DNVLmpwgzCo0pZYxfeat0 via5slp/ZzrNcAlgm1bgcWCEvW2+34DKOuFO8rkg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hans Verkuil , Sean Young Subject: [PATCH 7.2 351/556] media: cec: extron-da-hd-4k-plus: add sanity check Date: Wed, 9 Sep 2026 15:40:31 +0200 Message-ID: <20260909134243.006013863@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260909134230.441546314@linuxfoundation.org> References: <20260909134230.441546314@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: Hans Verkuil commit abac9820b26b5cfcb01eb79efe2abdd0ac7e07c3 upstream. Add check to prevent overflowing msg.msg[] in case the incoming data is malformed. Signed-off-by: Hans Verkuil Reviewed-by: Sean Young Fixes: 056f2821b631 ("media: cec: extron-da-hd-4k-plus: add the Extron DA HD 4K Plus CEC driver") Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c +++ b/drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c @@ -657,7 +657,8 @@ static void extron_process_received(stru if (!port || port->disconnected) return; - if (len < 5 || (len - 2) % 3 || data[len - 2] != '*') + if (len < 5 || ((len - 2) / 3 > sizeof(msg.msg)) || + (len - 2) % 3 || data[len - 2] != '*') goto malformed; while (*data != '*') {