From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.5]) (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 B394748F037; Mon, 19 Oct 2026 10:15:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792404948; cv=none; b=gJNK9ERUDdrOy/JlAEpeM7cm4ycfIReIBosstMMIpqnPbpXosfJRTbEwG1qeqIST1g6x45Wihy8k0fk7WiIrq1QUCzWdMv6cjTUN9cejR5Z8kLhUMOfCy0gGDSib2V9i9OhKIvdKATralmjb2X0nf6LFCUTLqXHsHbP6IbVWZ8k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792404948; c=relaxed/simple; bh=Fsnq+mcpslfiLoiVRTc3E/G/zndGzUivmpgt7PQnrTk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=r/Fvgel5Hq1ye1OrqcoqBeKoOb3FNw9ZVE8Hgq/R9DNa8eOvRrlnmIfia/qPvO1rupXD5wa9HuYKiV1NCYbXLMFpUNM7psQQjrsmz5YYLgqHF6P2EgXOfEb15H6HRZZq3Q4MWXdYtXwWMvcJXKsmpKs3jceUJ+M5Yiln1zAapUM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=aqvtdUPL; arc=none smtp.client-ip=117.135.210.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="aqvtdUPL" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=QI tUMk3/faB0K9oWLrR1Ff3bacbZI0KfxrnOXxLHV5I=; b=aqvtdUPLqi+92VWng/ GFce4w5gpDl3SLFNh2knSg9vnaordKHUTYVMkjRRXHIkEs2YJCgw/6T4ce/EEux2 dknKqG6HH3KQNomY9jSCurmHS3ajgsSsJZPfXYDwAUk62tVid1HAnUue4Y6kE+QV 818ofSh4lsjO7JdB8HVno2u18= Received: from pc.localdomain (unknown []) by gzga-smtp-mtada-g0-0 (Coremail) with SMTP id _____wD3Hxax7dVq4twABQ--.41578S3; Mon, 19 Oct 2026 18:15:19 +0800 (CST) From: Jiale Yao To: Felix Fietkau , Lorenzo Bianconi , Ryder Lee , Shayne Chen , Sean Wang , Matthias Brugger , AngeloGioacchino Del Regno , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Cc: Jiale Yao Subject: [PATCH 01/10] wifi: mt76: mt7603: validate MCU response length Date: Mon, 19 Oct 2026 18:14:56 +0800 Message-Id: <20261019101506.1926943-2-yaojiale02@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261019101506.1926943-1-yaojiale02@163.com> References: <20261019101506.1926943-1-yaojiale02@163.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:_____wD3Hxax7dVq4twABQ--.41578S3 X-Coremail-Antispam: 1Uf129KBjvdXoWrtw1UXFyUZr1UKryrKFWxZwb_yoWkXFX_ur 1v9ry7trWUG3ZYkw42kr43uryak3y8Zr95Z3y3t3yFg3y7JrWDCFs3Zry7Jryq9347uFyq yrnxJ3W8X34avjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRil1v3UUUUU== X-CM-SenderInfo: x1dryxhdohiji6rwjhhfrp/xtbCzRi582rV7biLfQAA3D The MCU response parser reads the sequence number from the receive descriptor without first ensuring that the descriptor is present. A truncated firmware response can therefore cause an out-of-bounds read. Reject responses shorter than the receive descriptor before accessing the sequence number. Fixes: f320d812b7bb ("mt76: implement .mcu_parse_response in struct mt76_mcu_ops") Signed-off-by: Jiale Yao --- drivers/net/wireless/mediatek/mt76/mt7603/mcu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7603/mcu.c index e432cce97640..b231fb2d3752 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7603/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7603/mcu.c @@ -26,6 +26,8 @@ mt7603_mcu_parse_response(struct mt76_dev *mdev, int cmd, dev->mcu_hang = MT7603_WATCHDOG_TIMEOUT; return -ETIMEDOUT; } + if (skb->len < sizeof(*rxd)) + return -EINVAL; rxd = (struct mt7603_mcu_rxd *)skb->data; if (seq != rxd->seq) -- 2.34.1