uvm_fault(0xfffffd80703f1758, 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
 469128  99674      0     0x14000      0x200    0  reaper
igmp_leavegroup(ffff800000d58440,ffff8000006b8000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512
in_delmulti(ffff800000d58440) at in_delmulti+0xd8 sys/netinet/in.c:908
ip_freemoptions(ffff8000006c8e40) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770
in_pcbdetach(fffffd805bb34a30) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591
udp_detach(fffffd806797fd60) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113
soclose(fffffd806797fd60,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline]
soclose(fffffd806797fd60,0) at soclose+0x253 sys/kern/uipc_socket.c:397
soo_close(fffffd8067b1ac98,ffff8000211e4020) at soo_close+0x44
fdrop(fffffd8067b1ac98,ffff8000211e4020) at fdrop+0xcb sys/kern/kern_descrip.c:1274
closef(fffffd8067b1ac98,ffff8000211e4020) at closef+0x120 sys/kern/kern_descrip.c:1258
fdfree(ffff8000211e4020) at fdfree+0xf4 sys/kern/kern_descrip.c:1190
exit1(ffff8000211e4020,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:197
sys_exit(ffff8000211e4020,ffff800024779dc0,ffff800024779e10) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff800024779e90) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff800024779e90) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7332d57ef7c0, count: 1
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