panic: attempt to execute user address 0x0 in supervisor mode
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*430447  25311      0           0  0x4000000    0  syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pageflttrap() at pageflttrap+0x3eb
kerntrap(ffff800015957900) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:287
alltraps_kern_meltdown(6,ffff800015113000,fffffd8036d6abd0,10,ffff800000025500,ffff800015957b68) at alltraps_kern_meltdown+0x7b
0(b,ffff800015957ac8,83,ffff800015957b68,0,b) at 0
rt_match(ffff800000b30688,0,1,0) at rt_match+0xbe rt_clone sys/net/route.c:266 [inline]
rt_match(ffff800000b30688,0,1,0) at rt_match+0xbe sys/net/route.c:242
ifa_ifwithroute(fe04c626,ffff800000b30660,ffff800000b30688,5) at ifa_ifwithroute+0x10d sys/net/rtsock.c:1176
rtm_getifa(ffff800015957d28,5) at rtm_getifa+0x1e3
rtm_output(ffff800000b30600,ffff800015957dd0,ffff800015957d28,1b,5) at rtm_output+0x5ce sys/net/rtsock.c:897
route_output(fffffd803759a800,fffffd802da64ab8,0,0) at route_output+0x609 sys/net/rtsock.c:819
route_usrreq(fffffd802da64ab8,9,fffffd803759a800,0,0,ffff8000ffff58c0) at route_usrreq+0x363 sys/net/rtsock.c:275
sosend(fffffd802da64ab8,0,ffff800015957fb0,0,0,80) at sosend+0x63d sys/kern/uipc_socket.c:524
sendit(ffff8000ffff58c0,4,ffff800015958090,0,ffff800015958170) at sendit+0x52b sys/kern/uipc_syscalls.c:662
end trace frame: 0xffff800015958110, count: 0
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