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 D589746D081; Tue, 21 Jul 2026 17:53:01 +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=1784656382; cv=none; b=kJuT9U7QgOL0nHs0OofbkqbAsOl9hW4kkPnET6cNR7c6xkvbKJcTjdJwQ1Ce+BQSvyXGsZIvWEbKYdLfY1jv/ZZuDzWY6tfWdjVuStp3pHkLNc3cksQeCQ0V/atrAeVm3aHV92TIEW38ghrb3L0tEj9FvJt6L2B81vkXey//Ki0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784656382; c=relaxed/simple; bh=kCE5A7jFa3sn+gTP/RAAqJ7R84sEMz9FYFZA/oAT2lU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PS7WlLWQoaxlMVQQqy2Zu8JYNOI2MRR3tHDHVt5IcPk5e1tPfFN7v6csJj5YGuHoVEoJ0Q/Nu1PAoqJaYLZpSpEGqp5FW9V8bH3e3GgbnOw8xBn4B53HOW9GBpIVspoWpCpOINaiRPQPoMxCqD1C/wX2k9//bfdbh38tFvrf9KQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zsFrFc7l; 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="zsFrFc7l" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 460AF1F01563; Tue, 21 Jul 2026 17:53:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784656381; bh=uc/Jelo7ADdcKTsOGH2zzyISqoFnKlq5XLggx5Z8STg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=zsFrFc7lKiRLlOe+RoBR/OVktsH3IZfDobHVbf4SsP6EGA0HW6lQEPYy8NWd4pFno psdCgUrbL+lFRygZ0IRBkmq+fO+TZ7k6NDMcgDP0yewPIRlurGI3c0s/27wnaap1md QFRxhggLz0HpDMxTaSJL2tzX8KqThWuMIu6BA7cA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tristan Madani , Loic Poulain , Jeff Johnson , Sasha Levin Subject: [PATCH 6.18 0365/1611] wifi: wcn36xx: fix heap overflow from oversized firmware HAL response Date: Tue, 21 Jul 2026 17:08:01 +0200 Message-ID: <20260721152523.370060404@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152514.750365251@linuxfoundation.org> References: <20260721152514.750365251@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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tristan Madani [ Upstream commit 88a240d86d3d64521f9194abe185ac71cc74d0bd ] The firmware response dispatcher copies all synchronous HAL responses into the 4096-byte hal_buf without validating the response length. A response exceeding WCN36XX_HAL_BUF_SIZE causes a heap buffer overflow with firmware-controlled content. Add a bounds check on the response length. Fixes: 8e84c2582169 ("wcn36xx: mac80211 driver for Qualcomm WCN3660/WCN3680 hardware") Signed-off-by: Tristan Madani Reviewed-by: Loic Poulain Link: https://patch.msgid.link/20260421135018.352774-2-tristmd@gmail.com Signed-off-by: Jeff Johnson Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/wcn36xx/smd.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c index 2cf86fc3f8fe0c..f550eb86301322 100644 --- a/drivers/net/wireless/ath/wcn36xx/smd.c +++ b/drivers/net/wireless/ath/wcn36xx/smd.c @@ -3353,6 +3353,10 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev, case WCN36XX_HAL_EXIT_IMPS_RSP: case WCN36XX_HAL_UPDATE_CHANNEL_LIST_RSP: case WCN36XX_HAL_ADD_BCN_FILTER_RSP: + if (len > WCN36XX_HAL_BUF_SIZE) { + wcn36xx_warn("HAL response too large: %d\n", len); + break; + } memcpy(wcn->hal_buf, buf, len); wcn->hal_rsp_len = len; complete(&wcn->hal_rsp_compl); -- 2.53.0