panic: maddr rwlock 0xffff80000159d860: enter read deadlock
Starting stack trace...
panic(ffffffff83353f60) at panic+0x1d0 sys/kern/subr_prf.c:229
rw_do_enter_read(ffff80000159d860,0) at rw_do_enter_read+0x4d2 sys/kern/kern_rwlock.c:379
in6_hasmulti(fffffd805ebda5f0,ffff80000159d800) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline]
in6_hasmulti(fffffd805ebda5f0,ffff80000159d800) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150
ip6_output(fffffd805ebda500,ffffffff839eee58,0,1,ffff80003c515ae0,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507
mld6_sendpkt(ffff8000015b6000,83,0) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499
mld6_start_listening(ffff8000015b6000,ffff80000159d800) at mld6_start_listening+0xe7 sys/netinet6/mld6.c:139
in6_addmulti(ffff80003c515e88,ffff80000159d800,ffff80003c515efc) at in6_addmulti+0x3d7 sys/netinet6/in6.c:1084
in6_joingroup(ffff80000159d800,ffff80003c515e88,ffff80003c515efc) at in6_joingroup+0x6c sys/netinet6/in6.c:-1
in6_update_ifa(ff
ff80000159d800,ffff80003c515f80,0) at in6_update_ifa+0x1a86 sys/netinet6/in6.c:-1
in6_ifattach_linklocal(ffff80000159d800,0) at in6_ifattach_linklocal+0x33b sys/netinet6/in6_ifattach.c:266
in6_ifattach(ffff80000159d800) at in6_ifattach+0x2d0 sys/netinet6/in6_ifattach.c:384
ifioctl(ffff8000015ab1b8,801169ab,ffff80003c516170,ffff800038fe8d20) at ifioctl+0x1b13 sys/net/if.c:2218
sys_ioctl(ffff800038fe8d20,ffff80003c516350,ffff80003c5162a0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c516350) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c516350) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x79d087867d90, count: 242
End of stack trace.
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