uvm_fault(0xfffffd800b0261e0, 0x48, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0xa9: movl 0x20(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000015ab030,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001554000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,81,2000,ffff80002f7de028) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002f7de028) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a2ce270) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80614e31e8,81,fffffd80097fb3a8,ffff80002f7de028) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80613cb568,ffff80002f7de028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80613cb568,ffff80002f7de028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80613cb568,ffff80002f7de028) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80613cb568,ffff80002f7de028) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002f7de028) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002f7de028,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002f7de028,ffff80002a2ce5e0,ffff80002a2ce530) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2ce5e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2ce5e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:732 end trace frame: 0xffff80002a2ce660, count: 0 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: uvm_fault(0xfffffd800b0261e0, 0x48, 0, 1) -> e ddb{0}> trace witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000015ab030,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001554000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,81,2000,ffff80002f7de028) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002f7de028) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a2ce270) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80614e31e8,81,fffffd80097fb3a8,ffff80002f7de028) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80613cb568,ffff80002f7de028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80613cb568,ffff80002f7de028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80613cb568,ffff80002f7de028) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80613cb568,ffff80002f7de028) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002f7de028) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002f7de028,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002f7de028,ffff80002a2ce5e0,ffff80002a2ce530) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2ce5e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2ce5e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:732 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b8fc29e150, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a2ce0d0 rbx 0 rdx 0 rcx 0xffff80002f7de028 rax 0xffffffff837deff0 cpu_info_full_primary+0x1ff0 r8 0x2 r9 0 r10 0x3e514f88f22b6a92 r11 0x3d22683181fcc8c0 r12 0 r13 0x1 r14 0x28 r15 0x3 rip 0xffffffff816bdab9 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a2ce020 ss 0x10 witness_checkorder+0xa9: movl 0x20(%r14),%r15d ddb{0}> show proc PROC (syz-executor) tid=441279 pid=99851 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002f7de028 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a2bb9b8,0xffffffff838d2328 process=0xffff80002f7e3a40 user=0xffff80002a2c9000, vmspace=0xfffffd800b0261e0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95513 2764 10767 0 2 0 syz-executor 95513 318534 10767 0 3 0x4000080 fsleep syz-executor 59419 311835 41653 0 2 0 syz-executor 59419 39369 41653 0 3 0x4000080 kqread syz-executor 89208 77760 575 0 2 0 syz-executor 89208 228870 575 0 2 0x4000000 syz-executor 89208 147019 575 0 3 0x4000000 inode syz-executor 48603 222296 10243 60929 2 0x10 syz-executor 48603 94624 10243 60929 3 0x4000090 fsleep syz-executor 90004 77474 90878 0 2 0 syz-executor 90004 5332 90878 0 3 0x4000080 fsleep syz-executor 21819 136988 49535 0 3 0x80 nanoslp syz-executor 21819 216906 49535 0 3 0x4000080 ttyin syz-executor 21819 26632 49535 0 3 0x4000080 fsleep syz-executor 46082 245746 18866 0 3 0x82 nanoslp syz-executor 71798 280073 1 0 3 0x100083 ttyin getty 7155 30824 0 0 3 0x14200 bored sosplice 89844 458009 18866 0 2 0x2 syz-executor 90878 30687 18866 0 3 0x82 nanoslp syz-executor 41653 123564 18866 0 3 0x82 nanoslp syz-executor 49535 85848 18866 0 3 0x82 nanoslp syz-executor 10243 37105 18866 0 3 0x82 nanoslp syz-executor 10767 19406 18866 0 3 0x82 nanoslp syz-executor 575 287608 18866 0 3 0x82 nanoslp syz-executor 18866 133999 30822 0 2 0x2 syz-executor 30822 26191 18249 0 3 0x10008a sigsusp ksh 18249 374929 5873 0 3 0x98 kqread sshd-session 5873 301353 39786 0 3 0x92 kqread sshd-session 39786 311958 1 0 3 0x88 kqread sshd 51230 244828 97713 74 3 0x1100092 bpf pflogd 97713 82865 1 0 3 0x80 sbwait pflogd 11680 281724 34922 73 3 0x1100090 kqread syslogd 34922 352289 1 0 3 0x100082 sbwait syslogd 16155 20123 1 0 3 0x100080 kqread resolvd 42491 270569 69219 77 3 0x100092 kqread dhcpleased 77216 292042 69219 77 3 0x100092 kqread dhcpleased 69219 31838 1 0 3 0x80 kqread dhcpleased 90940 128226 0 0 3 0x14200 bored smr 16547 172410 0 0 2 0x14200 zerothread 53233 472548 0 0 3 0x14200 aiodoned aiodoned 88720 391207 0 0 3 0x14200 syncer update 30216 464763 0 0 3 0x14200 cleaner cleaner 40354 69080 0 0 3 0x14200 reaper reaper 51858 222053 0 0 3 0x14200 pgdaemon pagedaemon 67658 162394 0 0 3 0x14200 bored viomb 19866 384517 0 0 3 0x40014200 acpi0 acpi0 92515 364275 0 0 7 0x40014200 idle1 34495 432053 0 0 3 0x14200 bored softnet3 780 505080 0 0 3 0x14200 bored softnet2 71712 429882 0 0 3 0x14200 bored softnet1 82591 517358 0 0 3 0x14200 bored softnet0 91696 163823 0 0 3 0x14200 bored systqmp 93540 495702 0 0 3 0x14200 bored systq 2193 144758 0 0 3 0x14200 tmoslp softclockmp 88335 287515 0 0 3 0x40014200 tmoslp softclock 89154 284602 0 0 3 0x40014200 idle0 1 49399 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 89208 (syz-executor) thread 0xffff80002f7df218 (228870) exclusive rrwlock inode r = 0 (0xfffffd806c54bd40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:732 #9 Xsyscall+0x128 Process 89208 (syz-executor) thread 0xffff80002f7de548 (147019) exclusive rrwlock inode r = 0 (0xfffffd806e0cf658) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 uipc_bind+0x2f4 sys/kern/uipc_usrreq.c:371 #8 sys_bind+0x28a sys/kern/uipc_syscalls.c:189 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:732 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10251 11111K 11905K 166960K 12290 0 pcb 17 16K 18K 166960K 258 0 rtable 146 6K 8K 166960K 448 0 pf 34 17K 19K 166960K 94 0 ifaddr 31 4K 8K 166960K 75 0 ifgroup 51 2K 2K 166960K 108 0 sysctl 4 1K 9K 166960K 12 0 counters 66 36K 37K 166960K 124 0 ioctlops 0 0K 4K 166960K 1728 0 iov 0 0K 28K 166960K 32 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1435 90K 91K 166960K 1897 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 32 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 639 0 sigio 0 0K 0K 166960K 20 0 proc 72 91K 128K 166960K 633 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 53 0 in_multi 59 4K 7K 166960K 137 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 417 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 239 164K 173K 166960K 7484 0 UVM aobj 10 2K 2K 166960K 11 0 pinsyscall 42 84K 102K 166960K 1752 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 29 0 NDP 11 0K 2K 166960K 48 0 temp 55 8690K 8814K 166960K 25457 0 kqueue 14 22K 28K 166960K 138 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 120 135 0 132 3 2 1 3 0 8 0 rtentry 176 143 0 80 6 0 6 6 0 8 0 unpcb 144 389 0 370 4 3 1 4 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 123 0 117 1 0 1 1 0 8 0 arp 128 25 0 11 1 0 1 1 0 8 0 inpcb 328 903 0 893 11 9 2 10 0 8 1 nd6 144 29 0 15 1 0 1 1 0 8 0 pkpcb 40 10 0 10 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 21 0 21 1 1 0 1 0 8 0 pppxif 1504 4 0 4 2 2 0 1 0 8 0 pffrag 232 5 0 0 1 0 1 1 0 482 0 pffrnode 88 5 0 0 1 0 1 1 0 8 0 pffrent 40 11 0 6 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 46 0 10 1 0 1 1 0 8 0 pfstkey 128 47 0 11 2 0 2 2 0 8 0 pfstate 384 46 0 11 5 0 5 5 0 8 0 pfrule 1344 25 0 19 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 603 0 320 29 9 20 29 0 8 0 art_table 32 604 0 320 4 0 4 4 0 8 0 art_node 16 141 0 87 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 1 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 27 0 17 1 0 1 1 0 8 0 shmpl 112 8 0 1 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 2502 0 1000 95 0 95 95 0 8 0 ffsino 288 2502 0 1000 109 0 109 109 0 8 0 nchpl 144 3388 0 1690 65 1 64 64 0 8 0 uvmvnodes 80 2945 0 0 61 0 61 61 0 8 0 vnodes 216 2945 0 0 164 0 164 164 0 8 0 namei 1024 12058 0 12057 2 1 1 1 0 8 0 percpumem 16 77 0 29 1 0 1 1 0 8 0 kstatmem 264 64 0 38 3 0 3 3 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 18619 0 18619 10 9 1 8 1 8 1 plimitpl 152 211 0 192 1 0 1 1 0 8 0 sigapl 424 938 0 888 7 1 6 7 0 8 0 knotepl 120 557 0 0 17 0 17 17 0 8 0 kqueuepl 224 386 0 375 9 8 1 9 0 8 0 pipepl 336 186 0 159 3 0 3 3 0 8 0 fdescpl 520 919 0 888 3 0 3 3 0 8 0 filepl 160 5932 0 5706 18 5 13 18 0 8 2 lockfpl 104 355 0 352 2 0 2 2 0 8 1 lockfspl 48 107 0 104 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 39 0 22 1 0 1 1 0 8 0 ucredpl 104 711 0 697 1 0 1 1 0 8 0 zombiepl 144 889 0 888 2 1 1 1 0 8 0 processpl 1240 938 0 888 5 0 5 5 0 8 0 procpl 656 1737 0 1679 6 0 6 6 0 8 0 srpgc 96 6 0 6 1 1 0 1 0 8 0 sockpl 728 1526 0 1494 14 10 4 13 0 8 0 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 109 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 36 0 0 1 0 1 1 0 8 0 mbufpl 256 961 0 0 61 0 61 61 0 8 0 bufpl 280 7275 0 1133 439 0 439 439 0 8 0 anonpl 32 12028 0 0 97 0 97 97 0 246 0 amapchunkpl 152 24704 0 24094 41 11 30 30 0 158 4 amappl16 200 3957 0 3894 22 13 9 22 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 115 0 103 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1574 0 1543 3 1 2 2 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 282 0 281 1 0 1 1 0 8 0 amappl8 136 40 0 38 1 0 1 1 0 8 0 amappl7 128 110 0 96 1 0 1 1 0 8 0 amappl6 120 221 0 217 1 0 1 1 0 8 0 amappl5 112 125 0 115 1 0 1 1 0 8 0 amappl4 104 321 0 301 1 0 1 1 0 8 0 amappl3 96 4669 0 4558 5 1 4 4 0 8 0 amappl2 88 654 0 591 2 0 2 2 0 8 0 amappl1 80 10424 0 9821 15 1 14 15 0 8 0 amappl 88 6699 0 6533 5 0 5 5 0 92 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 7 0 7 2 2 0 1 0 8 0 dma128 128 255 0 255 3 2 1 1 0 8 1 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 10 0 1 1 0 1 1 0 8 0 uaddrrnd 24 919 0 888 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 919 0 888 1 0 1 1 0 8 0 vmmpekpl 168 8866 0 8819 3 0 3 3 0 8 0 vmmpepl 168 64437 0 62413 106 12 94 105 0 357 0 vmsppl 480 918 0 888 5 0 5 5 0 8 0 rwobjpl 72 22825 0 18906 72 0 72 72 0 8 0 pdppl 4096 1846 0 1776 102 30 72 86 0 8 2 pvpl 32 18830 0 0 153 1 152 152 0 265 0 pmappl 256 918 0 888 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 435 0 45 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000015ab030,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001554000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,81,2000,ffff80002f7de028) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002f7de028) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a2ce270) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80614e31e8,81,fffffd80097fb3a8,ffff80002f7de028) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80613cb568,ffff80002f7de028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80613cb568,ffff80002f7de028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80613cb568,ffff80002f7de028) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80613cb568,ffff80002f7de028) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002f7de028) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002f7de028,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002f7de028,ffff80002a2ce5e0,ffff80002a2ce530) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2ce5e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2ce5e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:732 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b8fc29e150, count: -15 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+0x41e sys/dev/acpi/acpicpu_x86.c:1218 sched_idle(ffff8000299ddff0) at sched_idle+0x4d8 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+0x41e sys/dev/acpi/acpicpu_x86.c:1218 sched_idle(ffff8000299ddff0) at sched_idle+0x4d8 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5