panic: excl->share Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 349715 7207 0 0 0 1 syz-executor *200197 54815 0 0x14000 0x200 0 softclockmp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b4a35) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001594078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001594060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd806c853bf0,ffff800001594000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd806c853bf0,ffff800001594000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd806c853b00,ffffffff839eee58,0,0,ffff80002a1fe490,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a4280,83,0) 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(ffffffff83a15020) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff83835dd8,ffffffff83a15020) at timeout_run+0x159 sys/kern/kern_timeout.c:698 softclock_thread_run(ffffffff83835dd8) at softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 softclock_thread_mp(ffff8000ffffecf8) 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(ffffffff833b4a35) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001594078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001594060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd806c853bf0,ffff800001594000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd806c853bf0,ffff800001594000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd806c853b00,ffffffff839eee58,0,0,ffff80002a1fe490,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a4280,83,0) 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(ffffffff83a15020) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff83835dd8,ffffffff83a15020) at timeout_run+0x159 sys/kern/kern_timeout.c:698 softclock_thread_run(ffffffff83835dd8) at softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 softclock_thread_mp(ffff8000ffffecf8) at softclock_thread_mp+0x86 end trace frame: 0x0, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a1fe0e0 rbx 0xffffffff837e4e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff8000ffffecf8 rax 0xffffffff837e3ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb4eb391d02ea7d44 r11 0xdf3fdb8dbd07901f r12 0xffffffff837e4c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff810e0165 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a1fe0d0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (softclockmp) tid=200197 pid=54815 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=0xffff8000fffff228,0xffff8000ffffe2a8 process=0xffff8000ffff9340 user=0xffff80002a1f9000, vmspace=0xffffffff83a0c438 estcpu=0, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72456 382806 55621 0 2 0x10 syz-executor 72456 389581 55621 0 3 0x4000090 fsleep syz-executor 47710 506863 7626 0 2 0 syz-executor 56259 203921 21756 0 2 0 syz-executor 56259 7687 21756 0 3 0x4000080 fsleep syz-executor 56259 173127 21756 0 3 0x4000080 fsleep syz-executor 16320 521978 7769 0 3 0x80 nanoslp syz-executor 16320 51488 7769 0 3 0x4000080 fsleep syz-executor 16320 104337 7769 0 3 0x4000080 netcon syz-executor 7207 349715 96393 0 7 0 syz-executor 7207 220898 96393 0 3 0x4000080 fsleep syz-executor 7207 29449 96393 0 3 0x4000080 fsleep syz-executor 83273 440310 74276 0 2 0 syz-executor 83273 432156 74276 0 2 0x4000000 syz-executor 48115 438661 1 0 3 0x100083 ttyin getty 83135 387317 0 0 3 0x14280 nfsidl nfsio 57327 196729 0 0 3 0x14280 nfsidl nfsio 27680 195570 0 0 3 0x14280 nfsidl nfsio 92443 443769 0 0 3 0x14280 nfsidl nfsio 75259 345227 0 0 3 0x14280 nfsidl nfsio 33300 288520 0 0 3 0x14280 nfsidl nfsio 49372 34451 0 0 3 0x14280 nfsidl nfsio 65339 168815 0 0 3 0x14280 nfsidl nfsio 64009 117330 0 0 3 0x14280 nfsidl nfsio 41483 312582 0 0 3 0x14280 nfsidl nfsio 31224 167609 0 0 3 0x14280 nfsidl nfsio 38229 30946 0 0 3 0x14280 nfsidl nfsio 35828 194620 0 0 3 0x14280 nfsidl nfsio 41550 416341 0 0 3 0x14280 nfsidl nfsio 3169 345563 0 0 3 0x14280 nfsidl nfsio 49613 522512 0 0 3 0x14280 nfsidl nfsio 29314 271138 0 0 3 0x14280 nfsidl nfsio 93256 417988 0 0 3 0x14280 nfsidl nfsio 15817 378425 0 0 3 0x14280 nfsidl nfsio 40168 93682 0 0 3 0x14280 nfsidl nfsio 7626 271719 44289 0 3 0x82 nanoslp syz-executor 9749 471763 44289 0 3 0x82 nanoslp syz-executor 74276 395889 44289 0 3 0x82 nanoslp syz-executor 2333 365206 44289 0 3 0x82 nanoslp syz-executor 55621 81223 44289 0 3 0x82 nanoslp syz-executor 7769 286418 44289 0 3 0x82 nanoslp syz-executor 21756 487236 44289 0 3 0x82 nanoslp syz-executor 96393 503518 44289 0 3 0x82 nanoslp syz-executor 44289 227245 21911 0 3 0x82 kqread syz-executor 21911 386439 3902 0 3 0x10008a sigsusp ksh 3902 52780 9595 0 3 0x98 kqread sshd-session 9595 265713 45431 0 3 0x92 kqread sshd-session 45431 296448 1 0 3 0x88 kqread sshd 84477 308196 27591 74 3 0x1100092 bpf pflogd 27591 158564 1 0 3 0x80 sbwait pflogd 88731 277030 22408 73 3 0x1100090 kqread syslogd 22408 408458 1 0 3 0x100082 sbwait syslogd 29109 433798 1 0 3 0x100080 kqread resolvd 89428 379751 92728 77 3 0x100092 kqread dhcpleased 19450 40948 92728 77 3 0x100092 kqread dhcpleased 92728 445622 1 0 3 0x80 kqread dhcpleased 97344 471852 0 0 3 0x14200 bored smr 72294 248378 0 0 2 0x14200 zerothread 98979 91312 0 0 3 0x14200 aiodoned aiodoned 61107 473925 0 0 3 0x14200 syncer update 72308 277978 0 0 3 0x14200 cleaner cleaner 91597 47909 0 0 3 0x14200 reaper reaper 81616 506985 0 0 3 0x14200 pgdaemon pagedaemon 78114 389245 0 0 3 0x14200 bored viomb 83326 77074 0 0 3 0x40014200 acpi0 acpi0 53280 330525 0 0 3 0x40014200 idle1 51128 444035 0 0 3 0x14200 bored softnet1 53903 8112 0 0 3 0x14200 bored softnet0 82449 230242 0 0 3 0x14200 bored systqmp 86178 302862 0 0 3 0x14200 bored systq *54815 200197 0 0 7 0x14200 softclockmp 75990 78385 0 0 3 0x40014200 tmoslp softclock 13783 462943 0 0 3 0x40014200 idle0 1 58524 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 54815 (softclockmp) thread 0xffff8000ffffecf8 (200197) exclusive rwlock maddr r = 0 (0xffff800001594078) #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 (0xffffffff83891cc0) #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 (0xffffffff83835d78) #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 11073 12108K 12380K 166960K 12630 0 pcb 19 13K 13K 166960K 81 0 rtable 210 7K 9K 166960K 393 0 pf 40 18K 20K 166960K 85 0 ifaddr 42 7K 8K 166960K 66 0 ifgroup 60 2K 2K 166960K 98 0 sysctl 4 1K 9K 166960K 12 0 counters 78 37K 37K 166960K 112 0 ioctlops 0 0K 4K 166960K 1541 0 iov 0 0K 12K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1337 84K 85K 166960K 1679 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 12 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 413 0 sigio 0 0K 0K 166960K 5 0 proc 72 115K 164K 166960K 575 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 30 0 in_multi 82 6K 7K 166960K 114 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 396 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 248 151K 162K 166960K 5771 0 UVM aobj 14 4K 6K 166960K 15 0 pinsyscall 43 86K 104K 166960K 1541 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 22 0 NDP 14 0K 1K 166960K 44 0 temp 40 8670K 8738K 166960K 18431 0 kqueue 15 24K 28K 166960K 87 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 55 0 52 1 0 1 1 0 8 0 rtentry 176 116 0 28 6 0 6 6 0 8 0 unpcb 144 238 0 221 4 3 1 4 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 125 0 120 7 0 7 7 0 8 6 arp 136 19 0 2 1 0 1 1 0 8 0 inpcb 328 377 0 363 10 1 9 10 0 8 7 nd6 152 24 0 5 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 16 0 12 1 0 1 1 0 8 0 pppxif 1576 1 0 0 1 0 1 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 5 0 0 1 0 1 1 0 482 0 pffrnode 88 4 0 0 1 0 1 1 0 8 0 pffrent 40 6 0 1 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 35 0 1 1 0 1 1 0 8 0 pfstkey 128 36 0 2 2 0 2 2 0 8 0 pfstate 448 36 0 2 4 0 4 4 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 465 0 101 29 0 29 29 0 8 3 art_table 40 467 0 101 5 0 5 5 0 8 0 art_node 32 116 0 38 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2201 0 693 96 1 95 96 0 8 0 ffsino 296 2201 0 693 118 1 117 118 0 8 0 nchpl 144 2767 0 1061 64 0 64 64 0 8 0 rtmask 32 4 0 3 1 0 1 1 0 8 0 vnodes 216 2412 0 0 134 0 134 134 0 8 0 namei 1024 8841 0 8841 2 1 1 2 0 8 1 percpumem 16 71 0 17 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 848 2 0 1 1 0 1 1 0 8 0 kstatmem 264 56 0 26 3 0 3 3 0 8 1 scxspl 216 9655 0 9655 9 5 4 8 1 8 4 plimitpl 152 72 0 54 1 0 1 1 0 8 0 sigapl 424 742 0 674 8 0 8 8 0 8 0 knotepl 120 340 0 0 11 0 11 11 0 8 0 kqueuepl 224 140 0 129 3 1 2 2 0 8 1 pipepl 344 130 0 103 3 0 3 3 0 8 0 fdescpl 528 706 0 674 3 0 3 3 0 8 0 filepl 160 3724 0 3428 16 0 16 16 0 8 3 lockfpl 104 143 0 140 1 0 1 1 0 8 0 lockfspl 48 58 0 55 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 571 0 557 1 0 1 1 0 8 0 zombiepl 144 676 0 674 1 0 1 1 0 8 0 processpl 1232 742 0 674 6 0 6 6 0 8 0 procpl 664 1265 0 1189 8 0 8 8 0 8 0 sosppl 176 5 0 5 1 0 1 1 0 8 1 sockpl 752 678 0 644 14 3 11 14 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 168 0 0 11 0 11 11 0 8 0 bufpl 280 3315 0 127 228 0 228 228 0 8 0 anonpl 32 7563 0 0 61 0 61 61 0 246 0 amapchunkpl 152 17664 0 17144 26 0 26 26 0 158 5 amappl16 200 2701 0 2671 13 2 11 11 0 8 7 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 23 0 23 1 1 0 1 0 8 0 amappl13 176 495 0 493 1 0 1 1 0 8 0 amappl12 168 1066 0 1023 3 0 3 3 0 8 0 amappl11 160 17 0 17 1 1 0 1 0 8 0 amappl10 152 49 0 35 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 57 0 55 1 0 1 1 0 8 0 amappl7 128 103 0 102 1 0 1 1 0 8 0 amappl6 120 302 0 288 1 0 1 1 0 8 0 amappl5 112 76 0 65 1 0 1 1 0 8 0 amappl4 104 412 0 384 1 0 1 1 0 8 0 amappl3 96 2964 0 2865 4 1 3 3 0 8 0 amappl2 88 820 0 743 2 0 2 2 0 8 0 amappl1 80 10211 0 9627 14 1 13 14 0 8 1 amappl 88 4985 0 4812 5 0 5 5 0 92 0 uvmvnodes 80 108 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 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 706 0 674 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 706 0 674 1 0 1 1 0 8 0 vmmpekpl 168 7650 0 7615 3 0 3 3 0 8 1 vmmpepl 168 52394 0 50441 94 0 94 94 0 357 9 vmsppl 488 705 0 674 5 1 4 5 0 8 0 rwobjpl 80 17191 0 16143 27 1 26 26 0 8 1 pdppl 4096 1424 0 1351 99 26 73 86 0 8 0 pvpl 32 14800 0 0 120 0 120 120 0 265 0 pmappl 256 707 0 675 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 282 0 31 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(ffffffff833b4a35) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001594078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001594060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd806c853bf0,ffff800001594000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd806c853bf0,ffff800001594000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd806c853b00,ffffffff839eee58,0,0,ffff80002a1fe490,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000015a4280,83,0) 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(ffffffff83a15020) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff83835dd8,ffffffff83a15020) at timeout_run+0x159 sys/kern/kern_timeout.c:698 softclock_thread_run(ffffffff83835dd8) at softclock_thread_run+0xe7 sys/kern/kern_timeout.c:842 softclock_thread_mp(ffff8000ffffecf8) 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 end of kernel end trace frame: 0x715c651abe10, count: 12 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 end of kernel end trace frame: 0x715c651abe10, count: -3