panic: maddr rwlock 0xffff800001581860: enter read deadlock
Starting stack trace...
panic(ffffffff83325ab2) at panic+0x1ba sys/kern/subr_prf.c:229
rw_do_enter_read(ffff800001581860,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379
in6_hasmulti(fffffd806cac4bf0,ffff800001581800) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline]
in6_hasmulti(fffffd806cac4bf0,ffff800001581800) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150
ip6_output(fffffd806cac4b00,ffffffff839adbf8,0,1,ffff80002a86d560,0) at ip6_output+0x1369 sys/netinet6/ip6_output.c:507
mld6_sendpkt(ffff8000015a2600,83,0) at mld6_sendpkt+0x364 sys/netinet6/mld6.c:499
mld6_start_listening(ffff8000015a2600,ffff800001581800) at mld6_start_listening+0xe7 sys/netinet6/mld6.c:139
in6_addmulti(ffff80002a86d908,ffff800001581800,ffff80002a86d97c) at in6_addmulti+0x3cb sys/netinet6/in6.c:1084
in6_joingroup(ffff800001581800,ffff80002a86d908,ffff80002a86d97c) at in6_joingroup+0x6c sys/netinet6/in6.c:-1
in6_update_ifa(ffff800001581800,ffff80002a86da00,0) at in6_update_ifa+0x1a86 sys/netinet6/in6.c:-1
in6_ifattach_linklocal(ffff800001581800,0) at in6_ifattach_linklocal+0x33b sys/netinet6/in6_ifattach.c:266
in6_ifattach(ffff800001581800) at in6_ifattach+0x2d0 sys/netinet6/in6_ifattach.c:384
ifioctl(ffff8000015f1180,801169ab,ffff80002a86dbf0,ffff80002a7a4fa8) at ifioctl+0x1aa3 sys/net/if.c:2218
sys_ioctl(ffff80002a7a4fa8,ffff80002a86ddc0,ffff80002a86dd10) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1
syscall(ffff80002a86ddc0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a86ddc0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x741d59cc3d90, count: 242
End of stack trace.