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 F076426AC5; Sat, 12 Sep 2026 15:58:50 +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=1789228732; cv=none; b=cL0yFQik7arwBsOxPIMl+1Qqe6urRDJeyQYhHXrdR3P1QxdUbJJN1m/jZHvEEVdCXsXDjnD+mefXyzA41IoimNqKwzED78xfLaEeBBT2K+7lrjag3zaV7r0MO/bu+SQG9nDpMcqPmLZQiz0fAe8rmV9tfM+VWmHVYsNa9pZA38w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789228732; c=relaxed/simple; bh=llMVa8uHOHsK93aP0IT8EdNOMLerAznzkrLDLSat4KA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JKU/UoMIfNwSOFNStneXyhrPIWI/pE0fZN1ZK73TMHPmOuwk23lsTFpdLH1at17Nr0o0g83Nd0ydVVk4bfu3yxnp8uPqIHeBwJpJa0Uwo9k9QhyG/Emjaf5uX2fI64mh6E2CYAd0WFCwkRLBpk5A66t/R0YWjyeZXNqSMnWYrmc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zUJgU/vS; 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="zUJgU/vS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0136B1F000FF; Sat, 12 Sep 2026 15:58:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789228730; bh=zCgnH6Z10u2bbWBi0z2OF5sEDMgTaO1/FhkF4cOKYjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=zUJgU/vSMwTUJdJLBa2JQp7eiuUoIewUMZKUdevEc1BLLECnnGZ/3py6914pFiafP G9XA4sJ4JRoJSXLpXNUSrO0Cex4O0898zk+41a6zI8dp2/cidgMXwYvUjSYCDC8b+E 0CiXUNIwUcAwMwCnOmVeelif6iVL07an0zp8T67M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, P Praneesh , Kang Yang , Kalle Valo , Jeff Johnson , Jeff Johnson , Sasha Levin Subject: [PATCH 6.1 0445/1191] wifi: ath11k: fix RCU stall while reaping monitor destination ring Date: Sat, 12 Sep 2026 08:52:53 +0200 Message-ID: <20260912065558.227213301@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065548.086904252@linuxfoundation.org> References: <20260912065548.086904252@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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: P Praneesh [ Upstream commit 16c6c35c03ea73054a1f6d3302a4ce4a331b427d ] While processing the monitor destination ring, MSDUs are reaped from the link descriptor based on the corresponding buf_id. However, sometimes the driver cannot obtain a valid buffer corresponding to the buf_id received from the hardware. This causes an infinite loop in the destination processing, resulting in a kernel crash. kernel log: ath11k_pci 0000:58:00.0: data msdu_pop: invalid buf_id 309 ath11k_pci 0000:58:00.0: data dp_rx_monitor_link_desc_return failed ath11k_pci 0000:58:00.0: data msdu_pop: invalid buf_id 309 ath11k_pci 0000:58:00.0: data dp_rx_monitor_link_desc_return failed Fix this by skipping the problematic buf_id and reaping the next entry, replacing the break with the next MSDU processing. Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30 Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1 Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices") Signed-off-by: P Praneesh Signed-off-by: Kang Yang Acked-by: Kalle Valo Acked-by: Jeff Johnson Link: https://patch.msgid.link/20241219110531.2096-2-quic_kangyang@quicinc.com Signed-off-by: Jeff Johnson Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath11k/dp_rx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c index ac9796e8cd595..8064e505aad5e 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -4714,7 +4714,7 @@ ath11k_dp_rx_mon_mpdu_pop(struct ath11k *ar, int mac_id, if (!msdu) { ath11k_dbg(ar->ab, ATH11K_DBG_DATA, "msdu_pop: invalid buf_id %d\n", buf_id); - break; + goto next_msdu; } rxcb = ATH11K_SKB_RXCB(msdu); if (!rxcb->unmapped) { @@ -5348,7 +5348,7 @@ ath11k_dp_rx_full_mon_mpdu_pop(struct ath11k *ar, "full mon msdu_pop: invalid buf_id %d\n", buf_id); spin_unlock_bh(&rx_ring->idr_lock); - break; + goto next_msdu; } idr_remove(&rx_ring->bufs_idr, buf_id); spin_unlock_bh(&rx_ring->idr_lock); -- 2.53.0