From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D6041CCF2DF for ; Mon, 19 Oct 2026 10:15:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=QItUMk3/faB0K9oWLrR1Ff3bacbZI0KfxrnOXxLHV5I=; b=JQrsneLy/Vrw3kefHXjN0VXR9i JJYwPCXcxncOW7zknWperjGKm1ExPtcCiW3rDRfqzLE5a5wb8XQCRdCM6BshnVzUY1wPVIbcjsUds Gbr20cd83MoprBFM7xsJXeV9riSEk3S9B3cPs5t6i9XwM8QDL+pR/2KxvlDCkwhEtOdJpj3wxU8cd zn84AQrvRLjbi9U8itldGleyqxeK138orj8xyDSrsoF+Ejz3FrblxWURcUBJRe/HQxGuZRpM3YoU5 Q/mlFLDXY9hYipbhuNjDlKCAP7QEWMgGoMslNNaJsplYXgyTEohBtjZjVSc/Lp1yn07CHKsrtP5fD FFELJyKw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xIkP7-000000078s0-1d2K; Mon, 19 Oct 2026 10:15:41 +0000 Received: from m16.mail.163.com ([117.135.210.4]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xIkOz-000000078lK-0XBg; Mon, 19 Oct 2026 10:15:36 +0000 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> 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261019_031535_021614_358E57B2 X-CRM114-Status: UNSURE ( 9.02 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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