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 EF0F2421EF8; Thu, 30 Jul 2026 15:05:41 +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=1785423943; cv=none; b=sxHKJiHf8W1Qu3iPrF5L5CKM+XJ2z8lpj4L/6S9O0GkaSSGVfFpMJ12YwJw1HlZwZGm/oCegOTpMt59yeNmUjU/Zyvy3nBjAKtKIKPUQ2DG5T1izw6G2SSVG1O19LZo0JK24b1+rsbE4c94a/PdjTtjqdeyZj8S5UMluCR57atc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785423943; c=relaxed/simple; bh=vZh89hjr2VYImAfU6lUsXygImXDzkN89DqtaYDDMHEU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CkWjoAJZP4fDrIocG95KQj7BoeD2A6HNfiCLq42YeKUutLgMbo9O6jEEGWbiLIOdxGgtOql9KgE8IGy4N5yqqXncC5wxYXwypa/xPm5KlXwiw5n0NoufAv++gp1xPRZAJ6ZmZAL+JpdADkBn6aVpOa1UXw1Hqo/cOfuvPwozEoM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=yS5RCLJn; 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="yS5RCLJn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51A3E1F00ACA; Thu, 30 Jul 2026 15:05:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1785423941; bh=9menihQgSp8+A/aFjkaPfzXgUpWkNPQfqOVdWmL2V38=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=yS5RCLJn39STVdI4MtmiopMLckpyKPmQCCDK5C2EkGSnsjLMFjH3desh2EakYPc0x qBn+V1UPdrV20AyagQXkFK4XE0nEzhgyZJSIOAUVg+7eqWjimXvtKhfKJ+73TOZB1f KGWDn3FRLuP96275j4e40Kz1eqrrvhPZ2vxzpZLU= 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 6.18 175/675] wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get() Date: Thu, 30 Jul 2026 16:08:25 +0200 Message-ID: <20260730141448.856047253@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260730141445.110192266@linuxfoundation.org> References: <20260730141445.110192266@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: 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 5666f66474455a..330446f279cd6d 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -4609,6 +4609,9 @@ 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