uvm_fault(0xfffffd806b4ff018, 0x4, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      igmp_leavegroup+0xaf:   movl    0x4(%rax),%r12d
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
igmp_leavegroup(ffff800000e24780,ffff8000006ac000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512
in_delmulti(ffff800000e24780) at in_delmulti+0xd3 sys/netinet/in.c:908
ip_freemoptions(ffff8000006bc360) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1737
in_pcbdetach(fffffd806b650c48) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:606
udp_detach(ffff800000e5e250) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1139
soclose(ffff800000e5e250,0) at soclose+0x83 pru_detach sys/sys/protosw.h:283 [inline]
soclose(ffff800000e5e250,0) at soclose+0x83 sys/kern/uipc_socket.c:411
soo_close(fffffd806afcf610,ffff80002a1b4a58) at soo_close+0x44
fdrop(fffffd806afcf610,ffff80002a1b4a58) at fdrop+0xd5 sys/kern/kern_descrip.c:1274
closef(fffffd806afcf610,ffff80002a1b4a58) at closef+0x120 sys/kern/kern_descrip.c:1258
fdfree(ffff80002a1b4a58) at fdfree+0xe4 sys/kern/kern_descrip.c:1190
exit1(ffff80002a1b4a58,0,0,1) at exit1+0x38a sys/kern/kern_exit.c:199
sys_exit(ffff80002a1b4a58,ffff800032509aa0,ffff8000325099f0) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff800032509aa0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff800032509aa0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a472ea29750, count: 1
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