From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.5]) (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 7CA784D09F5; Mon, 19 Oct 2026 10:15:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792404958; cv=none; b=dxn2U0TkXTEmjm8DYrcAZbg/KMuE8LnBJcpz15dOj2pKXkyqAuhXIRsgVpyzhhOK1hvOIdZffiwYIuD95qP3JvP2TKNWgqyQzYh4pw3UmavPCn0ONzJugPp/BDqEad///Ock7/udyDyK93ZQe8kuhelV9sCyvvfD0z/WyWVHU5A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792404958; c=relaxed/simple; bh=t4PllrrYRyk59/eCVQ5fkdN3KIu88QJjRwFFhvS3tVU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=KLtOr/mFv89TqEyFzqbcy/TiRskP5qIkyCZ1y49dG/qywZCVa9JV6OCpjL8qaQtynW9QbOi5F/+vAtrCRKDTOsw64QXlx2t6s86yz41+KB9zkdWHhSE60LNsIlLruPMmjmrn6JMOjygL6OznAG6kBl64P7cd96wNTuimLAxqSsI= 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=BIY9THpN; arc=none smtp.client-ip=220.197.31.5 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="BIY9THpN" 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=JM dvjLbmygaAxKZ4470P9jf9J5rCOTHbqfSHY5SXp9A=; b=BIY9THpN9z3EpLKmw6 4URT/x8Kal0nnp8LhuXSCxTBtnN/5V3sL4UiJBDx+a5+ZCA83gqPH5NJOWLa5Suy 8FqvlrgAH4H2QHR3+1e6wxEnHqpXWncVSXbY4XoMyFpKcOuVlg1BCHws04oUVd/c RCQUxVyiHd6O+gtpnrrn5Q5Sc= Received: from pc.localdomain (unknown []) by gzga-smtp-mtada-g0-0 (Coremail) with SMTP id _____wD3Hxax7dVq4twABQ--.41578S9; Mon, 19 Oct 2026 18:15:27 +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 07/10] wifi: mt76: mt7915: validate channel MIB response length Date: Mon, 19 Oct 2026 18:15:02 +0800 Message-Id: <20261019101506.1926943-8-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--.41578S9 X-Coremail-Antispam: 1Uf129KBjvdXoWrtFW8tr4UXFy8ur47Gr18uFg_yoWkArX_ur nY9rnxKr18Gw1qkr12k3y293yqy395X3WkZrZ3trW3XwsrAFWfCr9rZwnrGrZF9rn2vF45 Gr98CayUAa4agjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRiuWl7UUUUU== X-CM-SenderInfo: x1dryxhdohiji6rwjhhfrp/xtbCzR+69GrV7b+MHgAA3j The channel survey query reads several MIB entries at a chip-specific offset without checking that the firmware response reaches those entries. A truncated response can cause out-of-bounds reads. Validate the offset and complete MIB array before processing it. Fixes: 654300281196 ("mt76: mt7915: use mt7915_mcu_get_mib_info() to get survey data") Signed-off-by: Jiale Yao --- drivers/net/wireless/mediatek/mt76/mt7915/mcu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c index 05614b99165b..955c0e6c7cb6 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c @@ -3239,6 +3239,10 @@ int mt7915_mcu_get_chan_mib_info(struct mt7915_phy *phy, bool chan_switch) req, len * sizeof(req[0]), true, &skb); if (ret) return ret; + if (skb->len < offs_cc + len * sizeof(*res)) { + dev_kfree_skb(skb); + return -EINVAL; + } res = (struct mt7915_mcu_mib *)(skb->data + offs_cc); -- 2.34.1