panic: excl->share Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 86073 76152 0 0 0x4000000 0 syz-executor *298947 77919 0 0x14000 0x200 1 softclockmp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b5a1c) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001590878,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001590860,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd80629c97f0,ffff800001590800) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd80629c97f0,ffff800001590800) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd80629c9700,ffffffff83987338,0,0,ffff80002a1fde20,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a6500,83,0) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499 mld6_fasttimo() at mld6_fasttimo+0x16d mld6_checktimer sys/netinet6/mld6.c:395 [inline] mld6_fasttimo() at mld6_fasttimo+0x16d sys/netinet6/mld6.c:369 pffasttimo(ffffffff83a152a8) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff8383b068,ffffffff83a152a8) at timeout_run+0x159 sys/kern/kern_timeout.c:698 softclock_thread_run(ffffffff8383b068) at softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 softclock_thread_mp(ffff8000fffff4c0) at softclock_thread_mp+0x86 end trace frame: 0x0, count: 3 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: excl->share ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b5a1c) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001590878,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001590860,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd80629c97f0,ffff800001590800) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd80629c97f0,ffff800001590800) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd80629c9700,ffffffff83987338,0,0,ffff80002a1fde20,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a6500,83,0) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499 mld6_fasttimo() at mld6_fasttimo+0x16d mld6_checktimer sys/netinet6/mld6.c:395 [inline] mld6_fasttimo() at mld6_fasttimo+0x16d sys/netinet6/mld6.c:369 pffasttimo(ffffffff83a152a8) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff8383b068,ffffffff83a152a8) at timeout_run+0x159 sys/kern/kern_timeout.c:698 softclock_thread_run(ffffffff8383b068) at softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 softclock_thread_mp(ffff8000fffff4c0) at softclock_thread_mp+0x86 end trace frame: 0x0, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a1fda70 rbx 0xffff8000299dee07 rdx 0 rcx 0xffff8000fffff4c0 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb065994c3cd43a99 r11 0x4b2eaa06ee7faebf r12 0xffff8000299dec08 r13 0 r14 0 r15 0x1 rip 0xffffffff817c1d35 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a1fda60 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (softclockmp) tid=298947 pid=77919 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=0, usrpri=50, slppri=0, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffff758,0xffff8000ffffed08 process=0xffff8000ffffa1b0 user=0xffff80002a1f9000, vmspace=0xffffffff838bee00 estcpu=0, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78004 99354 81961 0 2 0 syz-executor 78004 1474 81961 0 3 0x4000080 fsleep syz-executor 46708 83757 66488 0 2 0 syz-executor 46708 257576 66488 0 3 0x4000080 fsleep syz-executor 15355 262255 20536 0 2 0 syz-executor 15355 98777 20536 0 3 0x4000080 ttyout syz-executor 42034 511335 18560 0 2 0 syz-executor 42034 354668 18560 0 2 0x4000000 syz-executor 42034 486460 18560 0 3 0x4000080 fsleep syz-executor 76152 522002 9906 0 2 0 syz-executor 76152 86073 9906 0 7 0x4000000 syz-executor 76152 306816 9906 0 3 0x4000080 fsleep syz-executor 10026 304989 81987 0 3 0x80 nanoslp syz-executor 10026 385447 81987 0 3 0x4000080 kqsel syz-executor 10026 123119 81987 0 3 0x4000080 fsleep syz-executor 82786 128150 51376 -1 3 0x90 nanoslp syz-executor 82786 327015 51376 -1 3 0x4000090 netacc syz-executor 82786 459631 51376 -1 3 0x4000090 fsleep syz-executor 82786 201547 51376 -1 3 0x4000090 fsleep syz-executor 82786 413548 51376 -1 3 0x4000090 fsleep syz-executor 82786 34540 51376 -1 3 0x4000090 fsleep syz-executor 82786 56832 51376 -1 3 0x4000090 fsleep syz-executor 41005 235079 89530 0 3 0x3000 suspend syz-executor 41005 435105 89530 0 3 0x4081000 biowait syz-executor 49216 150514 0 0 3 0x14200 acct acct 66488 433472 16978 0 3 0x82 nanoslp syz-executor 51376 227545 16978 0 3 0x82 nanoslp syz-executor 9906 37349 16978 0 3 0x82 nanoslp syz-executor 89530 490027 16978 0 3 0x82 nanoslp syz-executor 20536 127818 16978 0 2 0x2 syz-executor 81961 479540 16978 0 3 0x82 nanoslp syz-executor 18560 274391 16978 0 3 0x82 nanoslp syz-executor 81987 106796 16978 0 3 0x82 nanoslp syz-executor 16978 410783 94131 0 3 0x82 kqread syz-executor 94131 156916 68284 0 3 0x10008a sigsusp ksh 68284 82488 74981 0 3 0x98 kqread sshd-session 74981 164916 45713 0 3 0x92 kqread sshd-session 12565 140247 1 0 3 0x100083 ttyin getty 45713 118915 1 0 3 0x88 kqread sshd 35109 29745 49034 74 3 0x1100092 bpf pflogd 49034 448817 1 0 3 0x80 sbwait pflogd 45719 340845 46490 73 3 0x1100090 kqread syslogd 46490 352509 1 0 3 0x100082 sbwait syslogd 34055 340090 1 0 3 0x100080 kqread resolvd 29886 70070 3500 77 3 0x100092 kqread dhcpleased 84070 189924 3500 77 3 0x100092 kqread dhcpleased 3500 398060 1 0 3 0x80 kqread dhcpleased 55421 416002 0 0 3 0x14200 bored smr 64796 517576 0 0 3 0x14200 pgzero zerothread 29686 458021 0 0 3 0x14200 aiodoned aiodoned 61242 217279 0 0 3 0x14200 syncer update 97843 404293 0 0 3 0x14200 cleaner cleaner 5110 391584 0 0 3 0x14200 reaper reaper 62600 280706 0 0 3 0x14200 pgdaemon pagedaemon 46476 293409 0 0 3 0x14200 bored viomb 20049 142560 0 0 3 0x40014200 acpi0 acpi0 75003 321917 0 0 3 0x40014200 idle1 23671 215733 0 0 3 0x14200 bored softnet1 14909 174659 0 0 3 0x14200 bored softnet0 66421 479116 0 0 3 0x14200 bored systqmp 30974 147168 0 0 3 0x14200 bored systq *77919 298947 0 0 7 0x14200 softclockmp 7844 212522 0 0 3 0x40014200 tmoslp softclock 77712 500349 0 0 3 0x40014200 idle0 1 76941 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 42034 (syz-executor) thread 0xffff8000357f2fb0 (354668) exclusive rrwlock inode r = 0 (0xfffffd8064a97900) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 41005 (syz-executor) thread 0xffff80003c448d20 (435105) exclusive rrwlock inode r = 0 (0xfffffd806c644458) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 77919 (softclockmp) thread 0xffff8000fffff4c0 (298947) exclusive rwlock maddr r = 0 (0xffff800001590878) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 mld6_fasttimo+0x8c mld6_checktimer sys/netinet6/mld6.c:-1 [inline] #2 mld6_fasttimo+0x8c sys/netinet6/mld6.c:369 #3 pffasttimo+0x184 sys/kern/uipc_domain.c:-1 #4 timeout_run+0x159 sys/kern/kern_timeout.c:698 #5 softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 #6 softclock_thread_mp+0x86 #7 proc_trampoline+0x10 shared rwlock netlock r = 0 (0xffffffff83832e50) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 mld6_fasttimo+0x5f sys/netinet6/mld6.c:-1 #3 pffasttimo+0x184 sys/kern/uipc_domain.c:-1 #4 timeout_run+0x159 sys/kern/kern_timeout.c:698 #5 softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 #6 softclock_thread_mp+0x86 #7 proc_trampoline+0x10 shared rwlock timeout r = 0 (0xffffffff8383b008) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 timeout_run+0x131 sys/kern/kern_timeout.c:694 #2 softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 #3 softclock_thread_mp+0x86 #4 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11055 12083K 12519K 166960K 12509 0 pcb 18 13K 13K 166960K 61 0 rtable 229 7K 8K 166960K 395 0 pf 36 18K 19K 166960K 68 0 ifaddr 41 7K 7K 166960K 59 0 ifgroup 56 2K 2K 166960K 82 0 sysctl 3 1K 9K 166960K 7 0 counters 72 37K 37K 166960K 98 0 ioctlops 0 0K 4K 166960K 1514 0 iov 1 0K 12K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1340 84K 85K 166960K 1550 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 319 0 sigio 0 0K 0K 166960K 4 0 proc 75 131K 164K 166960K 540 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 33 0 in_multi 89 6K 7K 166960K 102 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 468 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 260 160K 174K 166960K 4779 0 UVM aobj 8 4K 4K 166960K 9 0 pinsyscall 43 86K 102K 166960K 1478 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 12 0K 2K 166960K 37 0 temp 46 8671K 8744K 166960K 15113 0 kqueue 14 22K 29K 166960K 65 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 52 0 48 1 0 1 1 0 8 0 rtentry 176 117 0 16 6 0 6 6 0 8 0 unpcb 144 171 0 148 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 64 0 55 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 331 0 316 7 0 7 7 0 8 5 nd6 152 26 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 11 0 10 1 0 1 1 0 8 0 pppxif 1576 2 0 1 1 0 1 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 31 0 0 1 0 1 1 0 8 0 pfstkey 128 31 0 0 1 0 1 1 0 8 0 pfstate 448 30 0 0 4 0 4 4 0 8 0 pfrule 1344 22 0 18 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 474 0 56 29 0 29 29 0 8 1 art_table 40 476 0 56 5 0 5 5 0 8 0 art_node 32 117 0 25 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semapl 112 7 0 0 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1975 0 463 96 0 96 96 0 8 0 ffsino 296 1975 0 463 118 0 118 118 0 8 0 nchpl 144 2437 0 731 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2132 0 0 119 0 119 119 0 8 0 namei 1024 7630 0 7630 2 0 2 2 0 8 2 percpumem 16 64 0 13 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 848 1 0 0 1 0 1 1 0 8 0 kstatmem 264 44 0 18 3 0 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scxspl 216 9587 0 9586 4 1 3 3 1 8 2 plimitpl 152 82 0 63 1 0 1 1 0 8 0 sigapl 424 638 0 589 7 0 7 7 0 8 1 knotepl 120 309 0 0 10 0 10 10 0 8 0 kqueuepl 224 90 0 76 1 0 1 1 0 8 0 pipepl 344 135 0 108 3 0 3 3 0 8 0 fdescpl 528 621 0 589 3 0 3 3 0 8 0 filepl 160 2872 0 2636 15 0 15 15 0 8 4 lockfpl 104 62 0 58 1 0 1 1 0 8 0 lockfspl 48 32 0 28 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 440 0 426 1 0 1 1 0 8 0 zombiepl 144 590 0 589 1 0 1 1 0 8 0 processpl 1232 638 0 589 5 0 5 5 0 8 1 procpl 664 983 0 918 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 556 0 514 11 0 11 11 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 39 0 0 5 0 5 5 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1147 0 0 72 0 72 72 0 8 0 bufpl 280 3891 0 141 268 0 268 268 0 8 0 anonpl 32 7482 0 0 61 0 61 61 0 246 0 amapchunkpl 152 14295 0 13755 31 0 31 31 0 158 8 amappl16 200 1623 0 1440 12 2 10 10 0 8 0 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 39 0 39 1 1 0 1 0 8 0 amappl13 176 434 0 433 1 0 1 1 0 8 0 amappl12 168 994 0 949 3 0 3 3 0 8 0 amappl11 160 68 0 68 1 1 0 1 0 8 0 amappl10 152 50 0 36 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 43 0 41 1 0 1 1 0 8 0 amappl7 128 83 0 82 1 0 1 1 0 8 0 amappl6 120 288 0 275 1 0 1 1 0 8 0 amappl5 112 76 0 65 1 0 1 1 0 8 0 amappl4 104 422 0 393 1 0 1 1 0 8 0 amappl3 96 2412 0 2309 4 1 3 3 0 8 0 amappl2 88 748 0 670 2 0 2 2 0 8 0 amappl1 80 10104 0 9494 15 0 15 15 0 8 0 amappl 88 3990 0 3808 5 0 5 5 0 92 0 uvmvnodes 80 104 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 8 0 1 1 0 1 1 0 8 0 uaddrrnd 24 621 0 589 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 621 0 589 1 0 1 1 0 8 0 vmmpekpl 168 6922 0 6888 2 0 2 2 0 8 0 vmmpepl 168 46747 0 44575 96 0 96 96 0 357 0 vmsppl 488 620 0 589 5 0 5 5 0 8 1 rwobjpl 80 15365 0 14138 26 0 26 26 0 8 0 pdppl 4096 1251 0 1179 103 31 72 83 0 8 0 pvpl 32 14777 0 0 120 0 120 120 0 265 0 pmappl 256 621 0 589 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 343 0 33 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83878ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83970900) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83970900) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003c417860,ffff80000007ab80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge18_untramp() at Xintr_ioapic_edge18_untramp+0x18f __mp_lock(ffffffff83970900) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83970900) at __mp_lock+0x199 sys/kern/kern_lock.c:173 intr_handler(ffff80003c4179c0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83970900) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83970900) at __mp_lock+0x192 sys/kern/kern_lock.c:173 sysctl_vslock(200000000040,0) at sysctl_vslock+0x80 sys/kern/kern_sysctl.c:196 sys_sysctl(ffff8000357f3ca8,ffff80003c417c90,ffff80003c417be0) at sys_sysctl+0x371 sys/kern/kern_sysctl.c:301 syscall(ffff80003c417c90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c417c90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7206e3f6740, count: 1 ddb{0}> trace x86_ipi_db(ffffffff83878ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83970900) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83970900) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003c417860,ffff80000007ab80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge18_untramp() at Xintr_ioapic_edge18_untramp+0x18f __mp_lock(ffffffff83970900) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83970900) at __mp_lock+0x199 sys/kern/kern_lock.c:173 intr_handler(ffff80003c4179c0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83970900) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83970900) at __mp_lock+0x192 sys/kern/kern_lock.c:173 sysctl_vslock(200000000040,0) at sysctl_vslock+0x80 sys/kern/kern_sysctl.c:196 sys_sysctl(ffff8000357f3ca8,ffff80003c417c90,ffff80003c417be0) at sys_sysctl+0x371 sys/kern/kern_sysctl.c:301 syscall(ffff80003c417c90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c417c90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7206e3f6740, count: -14 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b5a1c) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001590878,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001590860,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd80629c97f0,ffff800001590800) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd80629c97f0,ffff800001590800) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd80629c9700,ffffffff83987338,0,0,ffff80002a1fde20,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a6500,83,0) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499 mld6_fasttimo() at mld6_fasttimo+0x16d mld6_checktimer sys/netinet6/mld6.c:395 [inline] mld6_fasttimo() at mld6_fasttimo+0x16d sys/netinet6/mld6.c:369 pffasttimo(ffffffff83a152a8) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff8383b068,ffffffff83a152a8) at timeout_run+0x159 sys/kern/kern_timeout.c:698 softclock_thread_run(ffffffff8383b068) at softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 softclock_thread_mp(ffff8000fffff4c0) at softclock_thread_mp+0x86 end trace frame: 0x0, count: 3 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b5a1c) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001590878,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001590860,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd80629c97f0,ffff800001590800) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd80629c97f0,ffff800001590800) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd80629c9700,ffffffff83987338,0,0,ffff80002a1fde20,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a6500,83,0) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499 mld6_fasttimo() at mld6_fasttimo+0x16d mld6_checktimer sys/netinet6/mld6.c:395 [inline] mld6_fasttimo() at mld6_fasttimo+0x16d sys/netinet6/mld6.c:369 pffasttimo(ffffffff83a152a8) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff8383b068,ffffffff83a152a8) at timeout_run+0x159 sys/kern/kern_timeout.c:698 softclock_thread_run(ffffffff8383b068) at softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 softclock_thread_mp(ffff8000fffff4c0) at softclock_thread_mp+0x86 end trace frame: 0x0, count: -12