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 4D02A3B8409; Mon, 17 Aug 2026 14:25:23 +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=1786976724; cv=none; b=HTzOsaLV2W1h7uhtNmIyDt5L3HR+Yx3y5+FbhoUY/CGB+Ja+c9uuXTZVSAPSafFHX6kZoua9E8C+9aJybRfrfw2P0q6ORup/muUWm/e2Mh157BUcb24uSDn2NbLWDrCIhSxa9x+PsCR/GOSKwNjyvdg7/9IjpaGscORA+7/MEZc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786976724; c=relaxed/simple; bh=VkYzvwaxIxp2bezcVbflXzTQeFv5ebLfJ8aF1Gd0iUA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eoYhbC8ZwJzjCkBpjwFTcs5snAU2hSbh1eiQaa55liqrL8gK3DGzS0mHeKaDIJlUCuzEapunxBGFcjaimvId6wRfOHmF1gtV46kzu5gd4+U1U361TOBTmz87IbDjCGf3284oMRIQDshxrPdkGrGM2PM4+v1CUb8tTsuO4DpXXes= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vvJo1KJh; 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="vvJo1KJh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 91F991F000E9; Mon, 17 Aug 2026 14:25:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786976723; bh=VwS+VMOCXUJrBZB0MQz64dPuzlEMnfAzEUt6SHsm7Sg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=vvJo1KJhvFukrIN2pYtXqM6Lcu/N3cHmExaMUSsGvggo6P+A3943M1vDAZPIs0+7+ XbqP87UjR3LFw6rouize+TOKaw52l8IoKKJKEFyeC8CkDnNaMjwwdvdPPkbCkmFKY0 8sQdHseFyNZj7qHen6BHX8RnnH+pyjwXXja3X9U0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dmitry Morgun , Rameshkumar Sundaram , Baochen Qiang , Jeff Johnson , Sasha Levin Subject: [PATCH 5.15 082/456] wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get() Date: Mon, 17 Aug 2026 15:27:52 +0200 Message-ID: <20260817132543.322256327@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260817132539.792407575@linuxfoundation.org> References: <20260817132539.792407575@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Morgun [ Upstream commit 7f11e70629650ff6ea140984e5ce188b775b2683 ] When the first entry in msdu_details has a zero buffer address, the code accesses msdu_details[i - 1] with i == 0, causing a buffer underflow. Fix similarly to ath12k_wifi7_hal_rx_msdu_list_get() by adding a separate check for i == 0 before the main condition to prevent the out-of-bounds access. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices") Signed-off-by: Dmitry Morgun Reviewed-by: Rameshkumar Sundaram Reviewed-by: Baochen Qiang Link: https://patch.msgid.link/20260530114252.42615-1-d.morgun@ispras.ru Signed-off-by: Jeff Johnson Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath11k/dp_rx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c index 318c3bfd45fdd2..c075ab49345643 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -4470,6 +4470,9 @@ static void ath11k_hal_rx_msdu_list_get(struct ath11k *ar, msdu_details = &msdu_link->msdu_link[0]; for (i = 0; i < HAL_RX_NUM_MSDU_DESC; i++) { + if (!i && FIELD_GET(BUFFER_ADDR_INFO0_ADDR, + msdu_details[i].buf_addr_info.info0) == 0) + break; if (FIELD_GET(BUFFER_ADDR_INFO0_ADDR, msdu_details[i].buf_addr_info.info0) == 0) { msdu_desc_info = &msdu_details[i - 1].rx_msdu_info; -- 2.53.0