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: d5c65159 ("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>
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