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本章主要来分享一例wifi固件的异常引起kernel crash的案例~
一.Kernel crash栈打印
747 [ 12.781947][ T883] icnss2_qmi: fatal: Capability resp wait failed with ret -110
748 [ 12.781986][ T883] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000004
749 [ 12.781991][ T883] Mem abort info:
750 [ 12.781993][ T883] ESR = 0x0000000096000005
751 [ 12.781996][ T883] EC = 0x25: DABT (current EL), IL = 32 bits
752 [ 12.781999][ T883] SET = 0, FnV = 0
753 [ 12.782002][ T883] EA = 0, S1PTW = 0
754 [ 12.782004][ T883] FSC = 0x05: level 1 translation fault
755 [ 12.782007][ T883] Data abort info:
756 [ 12.782009][ T883] ISV = 0, ISS = 0x00000005
757 [ 12.782012][ T883] CM = 0, WnR = 0
758 [ 12.782015][ T883] user pgtable: 4k pages, 39-bit VAs, pgdp=00000000d0094000
759 [ 12.782018][ T883] [0000000000000004] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
760 [ 12.782454][ T883] Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
761 [ 12.782486][ T883] Skip md ftrace buffer dump for: 0x1400eb0
770 [ 12.782842][ T883] CPU: 6 PID: 883 Comm: kworker/u16:6 Tainted: G S WC OE 6.1.57-android14-11-maybe-dirty-qki-consolidate #1
771 [ 12.782846][ T883] Hardware name: Qualcomm Technologies, Inc. Peridot based on SM8635 (DT)
772 [ 12.782849][ T883] Workqueue: icnss_driver_event icnss_driver_event_work [icnss2]
773 [ 12.782885][ T883] pstate: 02400005 (nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
774 [ 12.782888][ T883] pc : qcom_smem_state_update_bits+0xc/0x5c
775 [ 12.782898][ T883] lr : icnss_driver_event_work+0x574/0x2018 [icnss2]
776 [ 12.782927][ T883] sp : ffffffc00dfabc10
777 [ 12.782928][ T883] x29: ffffffc00dfabc10 x28: 00000000ffffff92 x27: ffffff88161eaf90
778 [ 12.782932][ T883] x26: ffffff88161ea978 x25: ffffff8836239d00 x24: ffffff88161ea040
779 [ 12.782936][ T883] x23: ffffff880f2ebd40 x22: ffffff88161ea798 x21: ffffff88161ea7b8
780 [ 12.782939][ T883] x20: ffffffeb22829000 x1