From nobody Mon Jun 8 09:49:34 2026 Received: from mail.ispras.ru (mail.ispras.ru [83.149.199.84]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B0ED63AC0EC; Sat, 30 May 2026 11:43:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=83.149.199.84 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780141392; cv=none; b=CK5xW4eC9NMK9cVpJZIidpCWSLa5wUvbKGDzx2BjY5EHUXLA51Ahf5SKsKoDz7WTtr1imF0iYvOH//YzYWqtOsTuCE93WDtcqBymqsuEpGlJsc23GVyenxhT7BNCVjwjujaCTI4KmX2Yc/GAkMfhZrIuwfFhVUA4nf2GdOctF+I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780141392; c=relaxed/simple; bh=25vHq+E7jDryH0kj4pNJWNsXwx8lf6KF9+ca7yV3CJ0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=oy1Z0C4OL7Nw8tJ9NJyUTE6/Pq/ckcQFOFr5ha16UJYHKyvV/7Ts2g7dmUoUCzfP2IR8F22PVe/8puxtsGowzlxaeglVmHZG5DK2FHcpj0QeRGxd3EI8aWamDpJnrDYno2I7l6tBa634qXiC3gzGhFYw201Yy7BrZY3dSMTjGpY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ispras.ru; spf=pass smtp.mailfrom=ispras.ru; dkim=pass (1024-bit key) header.d=ispras.ru header.i=@ispras.ru header.b=lOKFzkNf; arc=none smtp.client-ip=83.149.199.84 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ispras.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ispras.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ispras.ru header.i=@ispras.ru header.b="lOKFzkNf" Received: from ubuntu-jammy.. (unknown [82.22.40.93]) by mail.ispras.ru (Postfix) with ESMTPSA id 96D8F45F79A1; Sat, 30 May 2026 11:42:59 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.ispras.ru 96D8F45F79A1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ispras.ru; s=default; t=1780141380; bh=dF/ov+B2LMDoBsqviZzmq1HcSMdYOweJxIZb1W1we7g=; h=From:To:Cc:Subject:Date:From; b=lOKFzkNf+8uNjflP5RmWxBGKR4y+3GuP/z8wn8rBnEXDfIa4oObZuyPSzZw62hsji X3NmxL2roFI5LxSiAg/VipmEnpe3S63An+dKbFl6i8t04lB1K1a7w939NEcWhBeRZk pJ5T7qwFNM8PtnzwjM7D6GvRa5jd4ggbl6Q//OkY= From: Dmitry Morgun To: Jeff Johnson Cc: Dmitry Morgun , linux-wireless@vger.kernel.org, ath11k@lists.infradead.org, linux-kernel@vger.kernel.org, lvc-project@linuxtesting.org, stable@vger.kernel.org Subject: [PATCH] wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get() Date: Sat, 30 May 2026 11:42:52 +0000 Message-Id: <20260530114252.42615-1-d.morgun@ispras.ru> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When the first entry in msdu_details has a zero buffer address, the code accesses msdu_details[i - 1] with i =3D=3D 0, causing a buffer underflow. Fix similarly to ath12k_wifi7_hal_rx_msdu_list_get() by adding a separate check for i =3D=3D 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 --- 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 2a413e3a0..c9f520c2a 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -4565,6 +4565,9 @@ static void ath11k_hal_rx_msdu_list_get(struct ath11k= *ar, msdu_details =3D &msdu_link->msdu_link[0]; =20 for (i =3D 0; i < HAL_RX_NUM_MSDU_DESC; i++) { + if (!i && FIELD_GET(BUFFER_ADDR_INFO0_ADDR, + msdu_details[i].buf_addr_info.info0) =3D=3D 0) + break; if (FIELD_GET(BUFFER_ADDR_INFO0_ADDR, msdu_details[i].buf_addr_info.info0) =3D=3D 0) { msdu_desc_info =3D &msdu_details[i - 1].rx_msdu_info; --=20 2.34.1