Nagarajan Maran <quic_nmaran@xxxxxxxxxxx> wrote: > When max virtual ap interfaces are configured in all the bands with > ACS and hostapd restart is done every 60s, a crash is observed at > random times. > In this certain scenario, a fragmented packet is received for > self peer, for which rx_tid and rx_frags are not initialized in > datapath. While handling this fragment, crash is observed as the > rx_frag list is uninitialised and when we walk in > ath11k_dp_rx_h_sort_frags, skb null leads to exception. > > To address this, before processing received fragments we check > dp_setup_done flag is set to ensure that peer has completed its > dp peer setup for fragment queue, else ignore processing the > fragments. > > Call trace: > ath11k_dp_process_rx_err+0x550/0x1084 [ath11k] > ath11k_dp_service_srng+0x70/0x370 [ath11k] > 0xffffffc009693a04 > __napi_poll+0x30/0xa4 > net_rx_action+0x118/0x270 > __do_softirq+0x10c/0x244 > irq_exit+0x64/0xb4 > __handle_domain_irq+0x88/0xac > gic_handle_irq+0x74/0xbc > el1_irq+0xf0/0x1c0 > arch_cpu_idle+0x10/0x18 > do_idle+0x104/0x248 > cpu_startup_entry+0x20/0x64 > rest_init+0xd0/0xdc > arch_call_rest_init+0xc/0x14 > start_kernel+0x480/0x4b8 > Code: f9400281 f94066a2 91405021 b94a0023 (f9406401) > > Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1 > > Signed-off-by: Harshitha Prem <quic_hprem@xxxxxxxxxxx> > Signed-off-by: Nagarajan Maran <quic_nmaran@xxxxxxxxxxx> > Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx> 2 patches applied to ath-next branch of ath.git, thanks. a06bfb3c9f69 wifi: ath11k: Ignore frags from uninitialized peer in dp. 41e02bf4ae32 wifi: ath11k: fix undefined behavior with __fls in dp -- https://patchwork.kernel.org/project/linux-wireless/patch/20230403184155.8670-2-quic_nmaran@xxxxxxxxxxx/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
