]> www.infradead.org Git - users/jedix/linux-maple.git/commit
wifi: ath11k: fix RCU stall while reaping monitor destination ring
authorP Praneesh <quic_ppranees@quicinc.com>
Thu, 19 Dec 2024 11:05:30 +0000 (19:05 +0800)
committerJeff Johnson <jeff.johnson@oss.qualcomm.com>
Tue, 11 Feb 2025 15:27:10 +0000 (07:27 -0800)
commit16c6c35c03ea73054a1f6d3302a4ce4a331b427d
tree34c1e23ff95bafae7945695c3e2765f6b3f6ff67
parent81e4be30544ee7e8da80e9aae7acd69d3be6d05a
wifi: ath11k: fix RCU stall while reaping monitor destination ring

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 <quic_ppranees@quicinc.com>
Signed-off-by: Kang Yang <quic_kangyang@quicinc.com>
Acked-by: Kalle Valo <kvalo@kernel.org>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://patch.msgid.link/20241219110531.2096-2-quic_kangyang@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
drivers/net/wireless/ath/ath11k/dp_rx.c