From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 0A5862F28EB; Wed, 28 Jan 2026 15:40:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769614847; cv=none; b=ugL8M5JQQh1QzlXshaPXIx5wNM3hs1BGZ4ETtuleriYyz7Yq/zr6oGn8a/+NCj8dRTCx+R5nStVWvz/vE3EXCHPhIw6TnC/Y3kMcbRQklHLjoOuYANJEtlsSYVB51qjEpU+0muHyL4PkZHRn1e0LgroqCLq+gAG4okPwUWRqG3E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769614847; c=relaxed/simple; bh=elVjgy5utIzdeDb3iLKAyAu6xHMnxZRlOjWYbvl+7s0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=s4gejApoHabxSP5rARFo+jd/AkK9yNCaoI84P9EznVCXRprcLOugou9dS3wQEzK0S0FezTO9EuZ7NIopYeaQRzZ3GUFvf2oLwe8MMxha84lI5dAd//MG4lYbacJc2s7MWR2oOV0a8OZwfhEVBbFvwRXagcXnh0K4J8IwMszZWe4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ukTLUZOX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ukTLUZOX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4344FC2BC86; Wed, 28 Jan 2026 15:40:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1769614846; bh=elVjgy5utIzdeDb3iLKAyAu6xHMnxZRlOjWYbvl+7s0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ukTLUZOXuN8+ypnTXvUTiB+C58PHTOLv3k08KuSfQi9hK9sa0suzFsHSli3m0kBlf Ue/Z2gMVswjef7Ala7x6NsYgzrTIzqTtw0ucSPvKXUIrZ7jc4gsFwDkEnfUKG5wYMN cTh5ww338etQ5zcdLb17l1I08BSTQXTNQ+bfnjqs= 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 , Li hongliang <1468888505@139.com> Subject: [PATCH 6.6 250/254] wifi: ath11k: fix RCU stall while reaping monitor destination ring Date: Wed, 28 Jan 2026 16:23:46 +0100 Message-ID: <20260128145353.794992508@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260128145344.698118637@linuxfoundation.org> References: <20260128145344.698118637@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org 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: 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: Li hongliang <1468888505@139.com> Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/ath/ath11k/dp_rx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -4728,7 +4728,7 @@ ath11k_dp_rx_mon_mpdu_pop(struct ath11k 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) { @@ -5362,7 +5362,7 @@ ath11k_dp_rx_full_mon_mpdu_pop(struct at "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);