From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=46.4.11.11 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792826376; b=1tvo+eSfDi8bozHmvETIWHMHTiu+7vBFHYAls4KAg8S2ibmX9wBiqTPLpFuNwanYfOoZ 5MOo/EjliW8Ft12pOgMqFbOI1J0xf2fGkajHWpC3Upsb87TBGxF2kHW7JBdiIz01dyiUV cxyWstVlUssEAkU7NvhPGEliVnk+5SpJ3O+yE1zwc3Rx7XHLWERCBOcAIeAHQoFjif73h 5xcqh9iYSvWuCCIJPiLmXAKoN+/pwsMrYGJaZhZ/VWw0niMpGcQDDLB8dFW5dLNhzWVV+ SKPgKf8mENsDegot8rBhiF5vpjbhrn6+HHfc7az+qZ4ALCW/LBOpAfVs028l+9eIThQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792826376; h=DMARC-Filter:DKIM-Signature:Received:From:To:Subject:Date:Message-ID: X-Mailer:MIME-Version:Content-Transfer-Encoding; bh=NV8ifvPTI5I/E7xmWuEPPmaH58KCqCJ3SeISTtoYR2M=; b=rYnIRYxNfV08X1dDnAMvIIwxDyMMv1D7ZUhNmJ5nLbxIYgOak1rlkGi1OkZuhKbG8H3z AyFQ1tGR8f+OB0coCfdMzIBTas2XmssjravqN5ZjtKoKkvV1hr5TBHDP2t3QY6SS8Qrsp KcXuFMGjrd2fPEtaB0NF8NKJnzBSJMW92M0m7adQPoRoyJdqV0VYYXRyCfxbZwBATH/dm kVhw3v4MDhncrdpyRJ9+/ycyKVCkzYkgZevLWJwldcFWIGwKy5G2hjCCFM9yt6ghMBNAz 0J0jSGTPwFRshmSjvprI+zAdjNg5UZvCUHay06qrAryZiFpw9PuxBcOlcbqGA2su6Dw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=nbd.name; spf=pass smtp.mailfrom=nbd.name; dkim=pass header.d=nbd.name header.i=@nbd.name header.a=rsa-sha256 header.s=20160729 header.b=KTxhXAh5; arc=none smtp.remote-ip=46.4.11.11 Received: from nbd.name (nbd.name [46.4.11.11]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4EEAB606A31D for ; Sat, 24 Oct 2026 07:19:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 4EEAB606A31D Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nbd.name Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nbd.name Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=nbd.name header.i=@nbd.name header.a=rsa-sha256 header.s=20160729 header.b=KTxhXAh5 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nbd.name; s=20160729; h=Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject: To:From:Sender:Reply-To:Cc:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=NV8ifvPTI5I/E7xmWuEPPmaH58KCqCJ3SeISTtoYR2M=; b=KTxhXAh5D0Gv433nVYjpDv4G3k RgCrnEJrxtixspibCHgmBbvIhLymVBpqb1zEuGvwsDILyzIfgBgffSPqtRbUmJ16dp+My8EUitqto AntAFkhaIkzrjqa64uXEeZkVjegpn5qgymmUopxHO8kObDz99b3QZIOUpb5YWdZgRODQ=; Received: from p200300cadf12920000000000000005bb.dip0.t-ipconnect.de ([2003:ca:df12:9200::5bb] helo=localhost.localdomain) by ds12 with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1xKW2P-009vQq-0O for linux-wireless@vger.kernel.org; Sat, 24 Oct 2026 09:19:33 +0200 From: Felix Fietkau To: linux-wireless@vger.kernel.org Subject: [PATCH mt76-next 01/11] wifi: mt76: mt7921: validate CLC event length Date: Sat, 24 Oct 2026 09:19:17 +0200 Message-ID: <20261024071927.2279668-1-nbd@nbd.name> X-Mailer: git-send-email 2.47.3 X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit With CLC_CAP_EVT_EN set, __mt7921_mcu_set_clc() reads chan_conf from the SET_CLC response without checking the response length. A truncated response causes an out-of-bounds read. Reject a response that is too short for the CLC info TLV. Fixes: 4fc8df50fd41 ("wifi: mt76: mt7921: get regulatory information from the clc event") Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/mt7921/mcu.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c index 89d2c11b97ee..79fead3ccce1 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c @@ -1446,6 +1446,12 @@ int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2, if (ret_skb) { struct mt7921_clc_info_tlv *info; + if (ret_skb->len < 4 + offsetofend(struct mt7921_clc_info_tlv, + chan_conf)) { + dev_kfree_skb(ret_skb); + return -EINVAL; + } + info = (struct mt7921_clc_info_tlv *)(ret_skb->data + 4); dev->phy.clc_chan_conf = info->chan_conf; dev_kfree_skb(ret_skb); -- 2.47.3