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 2014243C04B; Thu, 30 Jul 2026 16:01:40 +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=1785427302; cv=none; b=TjfNPPIxyursynyNMbprmgxgKETJeTfozNPImDWrjgt9NqEvOHaH6ycFbiyjxz5GCXnfxzfql6AyY2dd6EC0pB1LY+xu32gh7/opYLr018cqcXDhx9NdqcB0k37dWEqM64DfVam/o0C/l12U36XpLCU+cvI11EbFexpnlOHlaqc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785427302; c=relaxed/simple; bh=YuQA8BvvhQNx5+so8r5QUsZbtVbNEMhfdco7OQoGmq0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AingEiTzPSS1B1DKM80CmeD0jjxDJlbbHG/B8Iv8FYn0EMkUsyzkQ6S+vY2sUY53HftStsyCpGVpz0VCOqITC2+X2fwkkYWRE1gAF7XdwitM/fclqAspHgc1wPWF0OrVF65MU5PoZW6TLpsR4ohyC/++2aRV1M+xs3G89aHlo+4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PSnc+sz2; 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="PSnc+sz2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2A7FF1F000E9; Thu, 30 Jul 2026 16:01:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1785427300; bh=jyr+sQbWh1Qe3iDw/N1e9WDQ2QXbYXvgdfUI1U5m4m0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PSnc+sz2GaN3L3BJgIMo8O0kJX65rVgwjVVprlcrCq9y2Nckk603zRju1ZrPKoXSb mZaccA0p0gf7eEpS9E1RbfpKxGh1gmFRTXHCvz0DX+CIcXrC2mKQHxJm0AqkYkh7eb ofIT5DHpjeE1wcJO2LtoD794dYG6liqL0dcYvuN8= 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 6.6 121/484] wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get() Date: Thu, 30 Jul 2026 16:10:18 +0200 Message-ID: <20260730141426.089337940@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260730141423.392222816@linuxfoundation.org> References: <20260730141423.392222816@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 6.6-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 31fd92bd9efe8f..23771abb3acec5 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -4619,6 +4619,9 @@ 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