Nagarajan Maran <quic_nmaran@xxxxxxxxxxx> wrote: > When the interface is brought up in monitor mode, it leads > to NULL pointer dereference crash. This crash happens when > the packet type is extracted for a SKB. This extraction > which is present in the received msdu delivery path,is > not needed for the monitor ring packets since they are > all RAW packets. Hence appending the flags with > "RX_FLAG_ONLY_MONITOR" to skip that extraction. > > Observed calltrace: > > Unable to handle kernel NULL pointer dereference at virtual address > 0000000000000064 > Mem abort info: > ESR = 0x0000000096000004 > EC = 0x25: DABT (current EL), IL = 32 bits > SET = 0, FnV = 0 > EA = 0, S1PTW = 0 > FSC = 0x04: level 0 translation fault > Data abort info: > ISV = 0, ISS = 0x00000004 > CM = 0, WnR = 0 > user pgtable: 4k pages, 48-bit VAs, pgdp=0000000048517000 > [0000000000000064] pgd=0000000000000000, p4d=0000000000000000 > Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP > Modules linked in: ath11k_pci ath11k qmi_helpers > CPU: 2 PID: 1781 Comm: napi/-271 Not tainted > 6.1.0-rc5-wt-ath-656295-gef907406320c-dirty #6 > Hardware name: Qualcomm Technologies, Inc. IPQ8074/AP-HK10-C2 (DT) > pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : ath11k_hw_qcn9074_rx_desc_get_decap_type+0x34/0x60 [ath11k] > lr : ath11k_hw_qcn9074_rx_desc_get_decap_type+0x5c/0x60 [ath11k] > sp : ffff80000ef5bb10 > x29: ffff80000ef5bb10 x28: 0000000000000000 x27: ffff000007baafa0 > x26: ffff000014a91ed0 x25: 0000000000000000 x24: 0000000000000000 > x23: ffff800002b77378 x22: ffff000014a91ec0 x21: ffff000006c8d600 > x20: 0000000000000000 x19: ffff800002b77740 x18: 0000000000000006 > x17: 736564203634343a x16: 656e694c20657079 x15: 0000000000000143 > x14: 00000000ffffffea x13: ffff80000ef5b8b8 x12: ffff80000ef5b8c8 > x11: ffff80000a591d30 x10: ffff80000a579d40 x9 : c0000000ffffefff > x8 : 0000000000000003 x7 : 0000000000017fe8 x6 : ffff80000a579ce8 > x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 > x2 : 3a35ec12ed7f8900 x1 : 0000000000000000 x0 : 0000000000000052 > Call trace: > ath11k_hw_qcn9074_rx_desc_get_decap_type+0x34/0x60 [ath11k] > ath11k_dp_rx_deliver_msdu.isra.42+0xa4/0x3d0 [ath11k] > ath11k_dp_rx_mon_deliver.isra.43+0x2f8/0x458 [ath11k] > ath11k_dp_rx_process_mon_rings+0x310/0x4c0 [ath11k] > ath11k_dp_service_srng+0x234/0x338 [ath11k] > ath11k_pcic_ext_grp_napi_poll+0x30/0xb8 [ath11k] > __napi_poll+0x5c/0x190 > napi_threaded_poll+0xf0/0x118 > kthread+0xf4/0x110 > ret_from_fork+0x10/0x20 > > Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1 > Reported-by: Florian Schmidt <florian@xxxxxxxx> > Link: https://bugzilla.kernel.org/show_bug.cgi?id=216573 > Signed-off-by: Nagarajan Maran <quic_nmaran@xxxxxxxxxxx> > Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx> Patch applied to ath-next branch of ath.git, thanks. 950b43f8bd8a wifi: ath11k: fix monitor mode bringup crash -- https://patchwork.kernel.org/project/linux-wireless/patch/20221129142532.23421-1-quic_nmaran@xxxxxxxxxxx/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
