panic: maddr rwlock 0xffff800000c31060: enter read deadlock
Starting stack trace...
panic(ffffffff83353f60) at panic+0x1d0 sys/kern/subr_prf.c:229
rw_do_enter_read(ffff800000c31060,0) at rw_do_enter_read+0x4d2 sys/kern/kern_rwlock.c:379
in6_hasmulti(fffffd80612074f0,ffff800000c31000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline]
in6_hasmulti(fffffd80612074f0,ffff800000c31000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150
ip6_output(fffffd8061207400,ffffffff839eee58,0,0,ffff80002a31b7f0,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507
mld6_sendpkt(ffff800001722180,83,0) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499
mld6_start_listening(ffff800001722180,ff
ff800000c31000) at mld6_start_listening+0xe7 sys/netinet6/mld6.c:139
in6_addmulti(ffff80002a31bb98,ffff800000c31000,ffff80002a31bc0c) at in6_addmulti+0x3d7 sys/netinet6/in6.c:1084
in6_joingroup(ffff800000c31000,ffff80002a31bb98,ffff80002a31bc0c) at in6_joingroup+0x6c sys/netinet6/in6.c:-1
in6_update_ifa(ffff800000c31000,ffff80002a31bc90,0) at in6_update_ifa+0x1a86 sys/netinet6/in6.c:-1
in6_ifattach_linklocal(ffff800000c31000,0) at in6_ifattach_linklocal+0x33b sys/netinet6/in6_ifattach.c:266
in6_ifattach(ffff800000c31000) at in6_ifattach+0x2d0 sys/netinet6/in6_ifattach.c:384
if_up(ffff800000c31000) at if_up+0x127 sys/net/if.c:1853
loioctl(ffff800000c31000,8020690c,ffff80000172d100) at loioctl+0x146 sys/net/if_loop.c:291
in6_ifinit(ffff800000c31000,ffff80000172d100,1) at in6_ifinit+0x1ed sys/netinet6/in6.c:969
in6_update_ifa(ffff800000c31000,ffff80002a31c0b8,0) at in6_update_ifa+0x1878 sys/netinet6/in6.c:722
in6_ifattach_loopback(ffff800000c31000) at in6_ifattach_loopback+0x1d0 sys/netinet6/in6_ifattach.c:334
in6_ifattach(ffff800000c31000) at in6_ifattach+0x202 sys/netinet6/in6_ifattach.c:372
if_up(ffff800000c31000) at if_up+0x127 sys/net/if.c:1853
loioctl(ffff800000c31000,8020690c,ffff800000c4a600) at loioctl+0x146 sys/net/if_loop.c:291
in_ifinit(ffff800000c31000,ffff800000c4a600,ffff80002a31c460,0) at in_ifinit+0x20f sys/netinet/in.c:679
in_ioctl_change_ifaddr(8040691a,ffff80002a31c450,ffff800000c31000) at in_ioctl_change_ifaddr+0x91c sys/netinet/in.c:523
ifioctl(ffff8000019a5848,8040691a,ffff80002a31c450,ffff80003abe5a10) at ifioctl+0x1714 pru_control sys/sys/protosw.h:353 [inline]
ifioctl(ffff8000019a5848,8040691a,ffff80002a31c450,ffff80003abe5a10) at ifioctl+0x1714 sys/net/if.c:2554
sys_ioctl(ffff80003abe5a10,ffff80002a31c630,ffff80002a31c580) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80002a31c630) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a31c630) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf79df254500, count: 232
End of stack trace.
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