> On 19 May 2022, at 07:26, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote:
> 
> I managed to capture the full console output this time:
> 
>       Fatal data abort:
>         x0:                0
>         x1:                6
>         x2:                0
>         x3:                0
>         x4:                0
>         x5: ffffa000beeb9b98
>         x6:               ff
>         x7: ffffa00000c2e100
>         x8: ffffa000b79305a8
>         x9:                0
>        x10:            20000
>        x11:                0
>        x12:                0
>        x13:                0
>        x14: ffffa00000ce3700
>        x15:                0
>        x16: ffff0000e5cbfff8 (_DYNAMIC + 4a0)
>        x17: ffff000000589828 (sosend + 0)
>        x18: ffff0000e6707490 (ratelimit_v6 + a37280)
>        x19:                0
>        x20: ffff0000e6707518 (ratelimit_v6 + a37308)
>        x21:                0
>        x22:                0
>        x23:               14
>        x24:               40
>        x25: ffff0000e6707538 (ratelimit_v6 + a37328)
>        x26:                0
>        x27:                0
>        x28: ffffa00081055d3c
>        x29: ffff0000e6707490 (ratelimit_v6 + a37280)
>         sp: ffff0000e6707490
>         lr: ffff000000657724 (fib4_lookup + 40)
>        elr:                0
>       spsr:         60000045
>        far:                0
>        esr:         86000004
>       panic: vm_fault failed: 0 error 1
>       cpuid = 4
>       time = 1652940940
>       KDB: stack backtrace:
>       db_trace_self() at db_trace_self
>       db_trace_self_wrapper() at db_trace_self_wrapper+0x30
>       vpanic() at vpanic+0x174
>       panic() at panic+0x44
>       data_abort() at data_abort+0x2c4
>       handle_el1h_sync() at handle_el1h_sync+0x10
>       --- exception, esr 0x86000004
>       (null)() at 0
>       ip_output() at ip_output+0x9a4
>       udp_send() at udp_send+0xb5c
>       sosend_dgram() at sosend_dgram+0x4a4
>       sosend() at sosend+0x2c
>       wg_send() at wg_send+0x108
>       wg_deliver_out() at wg_deliver_out+0x17c
>       gtaskqueue_run_locked() at gtaskqueue_run_locked+0x17c
>       gtaskqueue_thread_loop() at gtaskqueue_thread_loop+0x130
>       fork_exit() at fork_exit+0x88
>       fork_trampoline() at fork_trampoline+0x14
>       KDB: enter: panic
>       [ thread pid 0 tid 100280 ]
>       Stopped at      kdb_enter+0x40: undefined       f907827f
>       db> 

This looks like the kernel is jumping to a NULL pointer.

Looking at fib4_lookup + 40 on a recent kernel leads me to believe the issue is 
likely due to dp->f being invalid.

Andrew

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