panic: excl->share Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *501256 77157 0 0x14000 0x200 0 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(ffff80000159c078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff80000159c060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd806d539ff0,ffff80000159c000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd806d539ff0,ffff80000159c000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd806d539f00,ffffffff83987338,0,0,ffff80002a1fe4c0,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a3a80,83,0) 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(ffff8000ffffe298) 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: excl->share ddb{0}> 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(ffff80000159c078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff80000159c060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd806d539ff0,ffff80000159c000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd806d539ff0,ffff80000159c000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd806d539f00,ffffffff83987338,0,0,ffff80002a1fe4c0,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a3a80,83,0) 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(ffff8000ffffe298) at softclock_thread_mp+0x86 end trace frame: 0x0, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a1fe110 rbx 0xffffffff83879e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff8000ffffe298 rax 0xffffffff83878ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa3a4e94133d2085e r11 0x4a90df0ef40e50ad r12 0xffffffff83879c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff817c1d35 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a1fe100 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (softclockmp) tid=501256 pid=77157 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=0xffff8000ffffe000,0xffff8000ffffe7d8 process=0xffff8000ffff9810 user=0xffff80002a1f9000, vmspace=0xffffffff838bee00 estcpu=0, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56880 227559 8561 0 3 0x80 nanoslp syz-executor 56880 399270 8561 0 3 0x4000080 sysctllk syz-executor 56880 185875 8561 0 3 0x4000080 fsleep syz-executor 27944 471820 71249 0 3 0x80 nanoslp syz-executor 27944 521414 71249 0 3 0x4000080 sysctllk syz-executor 27944 162874 71249 0 3 0x4000080 fsleep syz-executor 27944 251830 71249 0 3 0x4000080 fsleep syz-executor 70484 356473 98510 0 3 0x80 nanoslp syz-executor 70484 108846 98510 0 3 0x4000080 sysctllk syz-executor 70484 214335 98510 0 3 0x4000080 fsleep syz-executor 57787 127247 55617 0 3 0x80 nanoslp syz-executor 57787 461638 55617 0 3 0x4000080 sysctllk syz-executor 57787 34199 55617 0 3 0x4000080 sysctllk syz-executor 57787 138380 55617 0 3 0x4000080 fsleep syz-executor 16318 403077 98250 0 3 0x80 nanoslp syz-executor 16318 406914 98250 0 3 0x4000080 sysctllk syz-executor 16318 54050 98250 0 3 0x4000080 fsleep syz-executor 12116 266106 10822 0 3 0x82 sysctllk sshd-session 40340 473481 25494 0 3 0x3000 suspend syz-executor 40340 506838 25494 0 3 0x4081000 biowait syz-executor 40340 408743 25494 0 3 0x4081000 fltagain2 syz-executor 90754 133227 0 0 3 0x14200 acct acct 623 28632 92387 0 3 0x82 nanoslp syz-executor 71249 68726 92387 0 3 0x82 nanoslp syz-executor 98250 339158 92387 0 3 0x82 nanoslp syz-executor 98510 345419 92387 0 3 0x82 nanoslp syz-executor 54149 384186 92387 0 3 0x82 wait syz-executor 8561 118468 92387 0 3 0x82 nanoslp syz-executor 25494 380530 92387 0 3 0x82 wait syz-executor 55617 449186 92387 0 3 0x82 nanoslp syz-executor 92387 217862 45858 0 3 0x82 kqread syz-executor 45858 316508 33666 0 3 0x10008a sigsusp ksh 33666 355230 22691 0 3 0x98 kqread sshd-session 22691 494115 10822 0 3 0x92 kqread sshd-session 27770 258383 1 0 3 0x100083 ttyopn getty 10822 491696 1 0 3 0x88 kqread sshd 79783 496861 73090 74 3 0x1100092 bpf pflogd 73090 182758 1 0 3 0x80 sbwait pflogd 80034 437480 75205 73 3 0x1100090 kqread syslogd 75205 335760 1 0 3 0x100082 sbwait syslogd 58769 373550 1 0 3 0x100080 kqread resolvd 22080 387601 68647 77 3 0x100092 kqread dhcpleased 16994 334476 68647 77 3 0x100092 kqread dhcpleased 68647 510156 1 0 3 0x80 kqread dhcpleased 91203 87534 0 0 3 0x14200 bored smr 14550 155071 0 0 3 0x14200 pgzero zerothread 60358 257785 0 0 3 0x14200 aiodoned aiodoned 82853 399496 0 0 3 0x14200 syncer update 66036 150224 0 0 3 0x14200 cleaner cleaner 47120 295876 0 0 3 0x14200 reaper reaper 73774 478106 0 0 3 0x14200 pgdaemon pagedaemon 20011 445581 0 0 3 0x14200 bored viomb 41639 389175 0 0 3 0x40014200 acpi0 acpi0 23498 53202 0 0 7 0x40014200 idle1 98445 204645 0 0 3 0x14200 bored softnet1 97696 150387 0 0 3 0x14200 bored softnet0 74913 268699 0 0 3 0x14200 bored systqmp 95220 357165 0 0 3 0x14200 bored systq *77157 501256 0 0 7 0x14200 softclockmp 42787 218858 0 0 3 0x40014200 tmoslp softclock 38318 43381 0 0 3 0x40014200 idle0 1 245053 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 40340 (syz-executor) thread 0xffff8000fffeefb0 (506838) exclusive rrwlock inode r = 0 (0xfffffd806c6c5b48) #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 40340 (syz-executor) thread 0xffff8000fffec2c0 (408743) exclusive rwlock sysctllk r = 0 (0xffffffff83889218) #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 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:191 #3 kern_sysctl+0xd17 sys/kern/kern_sysctl.c:726 #4 sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 Process 77157 (softclockmp) thread 0xffff8000ffffe298 (501256) exclusive rwlock maddr r = 0 (0xffff80000159c078) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11069 12154K 12426K 166960K 12434 0 pcb 18 12K 12K 166960K 51 0 rtable 240 9K 9K 166960K 394 0 pf 36 18K 22K 166960K 73 0 ifaddr 40 7K 7K 166960K 58 0 ifgroup 51 2K 2K 166960K 82 0 sysctl 2 1K 9K 166960K 7 0 counters 68 36K 37K 166960K 100 0 ioctlops 0 0K 4K 166960K 1519 0 iov 0 0K 16K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1340 84K 84K 166960K 1507 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 313 0 sigio 1 0K 0K 166960K 8 0 proc 72 115K 164K 166960K 541 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 31 0 in_multi 88 6K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 1 0 mrt 2 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 397 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 276 152K 162K 166960K 4666 0 UVM aobj 9 2K 2K 166960K 9 0 pinsyscall 45 90K 105K 166960K 1445 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 23 0 NDP 11 0K 2K 166960K 37 0 temp 44 8667K 8734K 166960K 17955 0 kqueue 13 20K 26K 166960K 55 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 44 0 41 1 0 1 1 0 8 0 rtentry 176 117 0 14 6 1 5 6 0 8 0 unpcb 144 178 0 159 4 0 4 4 0 8 3 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 98 0 90 4 0 4 4 0 8 3 arp 136 19 0 2 1 0 1 1 0 8 0 inpcb 328 279 0 264 5 1 4 4 0 8 2 nd6 152 24 0 3 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 12 0 12 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 1 0 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfstitem 24 30 0 1 1 0 1 1 0 8 0 pfstkey 128 30 0 1 1 0 1 1 0 8 0 pfstate 448 29 0 1 4 0 4 4 0 8 0 pfrule 1344 23 0 17 2 1 1 2 0 8 0 rttmr 136 1 0 0 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 494 0 55 29 1 28 29 0 8 0 art_table 40 496 0 55 5 0 5 5 0 8 0 art_node 32 117 0 24 1 0 1 1 0 8 0 semapl 112 3 0 0 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1919 0 405 95 0 95 95 0 8 0 ffsino 296 1919 0 405 117 0 117 117 0 8 0 nchpl 144 2356 0 652 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 2078 0 0 116 0 116 116 0 8 0 namei 1024 7365 0 7365 2 1 1 1 0 8 1 percpumem 16 65 0 16 1 0 1 1 0 8 0 kstatmem 264 44 0 20 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 11839 0 11838 3 2 1 2 1 8 0 plimitpl 152 119 0 100 1 0 1 1 0 8 0 sigapl 424 624 0 574 7 1 6 7 0 8 0 knotepl 120 536 0 0 17 0 17 17 0 8 0 kqueuepl 224 142 0 132 5 0 5 5 0 8 4 pipepl 344 136 0 108 3 0 3 3 0 8 0 fdescpl 528 607 0 574 3 0 3 3 0 8 0 filepl 160 2736 0 2501 13 0 13 13 0 8 3 lockfpl 104 74 0 72 1 0 1 1 0 8 0 lockfspl 48 35 0 33 1 0 1 1 0 8 0 sessionpl 144 23 0 13 1 0 1 1 0 8 0 pgrppl 48 32 0 14 1 0 1 1 0 8 0 ucredpl 104 232 0 218 1 0 1 1 0 8 0 zombiepl 144 577 0 574 1 0 1 1 0 8 0 processpl 1232 624 0 574 5 1 4 5 0 8 0 procpl 664 946 0 882 6 0 6 6 0 8 0 sockpl 752 510 0 473 10 0 10 10 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 39 0 0 1 0 1 1 0 8 0 mbufpl 256 193 0 0 12 0 12 12 0 8 0 bufpl 280 4893 0 133 340 0 340 340 0 8 0 anonpl 32 8249 0 0 68 1 67 67 0 246 0 amapchunkpl 152 13855 0 13262 25 0 25 25 0 158 2 amappl16 200 2496 0 2245 18 4 14 15 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 25 0 25 1 1 0 1 0 8 0 amappl13 176 430 0 429 1 0 1 1 0 8 0 amappl12 168 1066 0 1022 3 0 3 3 0 8 0 amappl11 160 21 0 21 1 1 0 1 0 8 0 amappl10 152 67 0 53 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 29 0 27 1 0 1 1 0 8 0 amappl7 128 82 0 80 1 0 1 1 0 8 0 amappl6 120 280 0 266 1 0 1 1 0 8 0 amappl5 112 77 0 66 1 0 1 1 0 8 0 amappl4 104 423 0 393 1 0 1 1 0 8 0 amappl3 96 2349 0 2244 4 1 3 3 0 8 0 amappl2 88 732 0 648 2 0 2 2 0 8 0 amappl1 80 9955 0 9334 14 0 14 14 0 8 0 amappl 88 3912 0 3719 5 0 5 5 0 92 0 uvmvnodes 80 105 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 0 1 0 1 1 0 8 0 uaddrrnd 24 607 0 574 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 607 0 574 1 0 1 1 0 8 0 vmmpekpl 168 6763 0 6731 2 0 2 2 0 8 0 vmmpepl 168 46781 0 44496 101 1 100 100 0 357 0 vmsppl 488 606 0 574 6 1 5 5 0 8 0 rwobjpl 80 16052 0 14728 30 2 28 28 0 8 0 pdppl 4096 1221 0 1148 103 30 73 87 0 8 0 pvpl 32 15654 0 0 127 0 127 127 0 265 0 pmappl 256 606 0 574 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 284 0 35 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> 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(ffff80000159c078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff80000159c060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd806d539ff0,ffff80000159c000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd806d539ff0,ffff80000159c000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd806d539f00,ffffffff83987338,0,0,ffff80002a1fe4c0,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a3a80,83,0) 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(ffff8000ffffe298) at softclock_thread_mp+0x86 end trace frame: 0x0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5