wpanic: excl->share
Starting stack trace...
panic(ffffffff833b5a1c) at panic+0x1d0 sys/kern/subr_prf.c:229
witness_checkorder(ffff800000c31078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854
rw_do_enter_read(ffff800000c31060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355
in6_hasmulti(fffffd805d214ff0,ffff800000c31000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline]
in6_hasmulti(fffffd805d214ff0,ffff800000c31000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150
ip6_output(fffffd805d214f00,ffffffff83987338,0,0,ffff8000327cd970,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507
mld6_sendpkt(ffff8000015b0580,83,0) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499
mld6_start_listening(ffff8000015b0580,ffff800000c31000) at mld6_start_listening+0xe7 sys/netinet6/mld6.c:139
in6_addmulti(ffff8000327cdd18,ffff800000c31000,ffff8000327cdd8c) at in6_addmulti+0x3d7 sys/netinet6/in6.c:1084
in6_joingroup(ffff800000c31000,ffff8000327cdd18,ffff8000327cdd8c) at in6_joingroup+0x6c sys/netinet6/in6.c:-1
in6_update_ifa(ffff800000c31000,ffff8000327cdf60,0) at in6_update_ifa+0x1a86 sys/netinet6/in6.c:-1
in6_ioctl_change_ifaddr(8080691a,ffff8000327cdf60,ffff800000c31000) at in6_ioctl_change_ifaddr+0x64e sys/netinet6/in6.c:352
ifioctl(ffff800001643550,8080691a,ffff8000327cdf60,ffff80003c4b22e8) at ifioctl+0x1714 pru_control sys/sys/protosw.h:353 [inline]
ifioctl(ffff800001643550,8080691a,ffff8000327cdf60,ffff80003c4b22e8) at ifioctl+0x1714 sys/net/if.c:2554
sys_ioctl(ffff80003c4b22e8,ffff8000327ce140,ffff8000327ce090) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff8000327ce140) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000327ce140) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x461fcc5080, count: 242
End of stack trace.
itness: shared lsyncing disks...ock of (rwlock) maddr while exclusively locked

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