uvm_fault(0xfffffd800b0631e8, 0x48, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND 173115 81482 0 0x2 0 0 syz-executor witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_unbind(ffff800001527d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800000b58000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,81,2000,ffff8000fffe9778) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe9778) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2d1e80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c939560,81,fffffd80097fd478,ffff8000fffe9778) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c76d188,ffff8000fffe9778) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c76d188,ffff8000fffe9778) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c76d188,ffff8000fffe9778) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c76d188,ffff8000fffe9778) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9778) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9778,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9778,ffff80002a2d21f0,ffff80002a2d2140) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2d21f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d21f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 end trace frame: 0xffff80002a2d2270, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd800b0631e8, 0x48, 0, 1) -> e ddb{1}> trace witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_unbind(ffff800001527d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800000b58000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,81,2000,ffff8000fffe9778) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe9778) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2d1e80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c939560,81,fffffd80097fd478,ffff8000fffe9778) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c76d188,ffff8000fffe9778) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c76d188,ffff8000fffe9778) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c76d188,ffff8000fffe9778) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c76d188,ffff8000fffe9778) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9778) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9778,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9778,ffff80002a2d21f0,ffff80002a2d2140) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2d21f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d21f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x765304aeb140, count: -15 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2d1ca0 rbx 0 rdx 0 rcx 0xffff8000fffe9778 rax 0xffff8000299edffe r8 0xffff80002a2d1fb0 r9 0x40 r10 0x823ed2cf042a8508 r11 0xbf15aa1d282ca82d r12 0xfe r13 0x9 r14 0x28 r15 0 rip 0xffffffff810c46f5 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a2d1c00 ss 0 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (syz-executor) tid=478461 pid=30963 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffe9778 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffe9248,0xffff8000fffe9a20 process=0xffff8000fffece88 user=0xffff80002a2cd000, vmspace=0xfffffd800b0631e8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49384 420624 30318 0 2 0 syz-executor 90563 491334 40614 0 2 0 syz-executor 90563 141569 40614 0 3 0x4000080 fsleep syz-executor 22637 475132 24012 0 2 0 syz-executor 22637 51325 24012 0 3 0x4000080 msgwait syz-executor 22637 179140 24012 0 2 0x4000000 syz-executor 68367 371889 61252 0 2 0 syz-executor 68367 31859 61252 0 3 0x4000080 kqpoll syz-executor 40191 383630 81482 0 2 0 syz-executor 40191 316514 81482 0 3 0x4000080 fsleep syz-executor 40191 55662 81482 0 3 0x4000080 fsleep syz-executor 42896 161247 0 0 3 0x14200 acct acct 28883 166369 78745 0 2 0 syz-executor 28883 442011 78745 0 2 0x4000000 syz-executor 28883 83574 78745 0 3 0x4000080 fsleep syz-executor 65118 125294 67175 0 2 0 syz-executor 65118 427504 67175 0 3 0x4000080 fsleep syz-executor 74570 111017 1 0 3 0x82 nanoslp getty 81482 173115 80937 0 7 0x2 syz-executor 24012 76053 80937 0 3 0x82 nanoslp syz-executor 87696 286450 80937 0 3 0x82 nanoslp syz-executor 61252 280668 80937 0 2 0xc82 syz-executor 67175 256331 80937 0 2 0xc82 syz-executor 78745 520924 80937 0 3 0x82 nanoslp syz-executor 30318 80289 80937 0 2 0xc82 syz-executor 40614 129226 80937 0 2 0xc82 syz-executor 80937 209510 70281 0 3 0x82 kqread syz-executor 70281 184924 81492 0 3 0x10008a sigsusp ksh 81492 522277 44950 0 3 0x98 kqread sshd-session 44950 258690 83332 0 3 0x92 kqread sshd-session 83332 249060 1 0 3 0x88 kqread sshd 8253 456754 80060 74 3 0x1100092 bpf pflogd 80060 129265 1 0 3 0x80 sbwait pflogd 63442 457788 27619 73 3 0x1100090 kqread syslogd 27619 183691 1 0 3 0x100082 sbwait syslogd 82256 205708 1 0 3 0x100080 kqread resolvd 95256 374201 27811 77 3 0x100092 kqread dhcpleased 82917 417977 27811 77 3 0x100092 kqread dhcpleased 27811 78777 1 0 3 0x80 kqread dhcpleased 60679 65734 0 0 3 0x14200 bored smr 65985 61087 0 0 2 0x14200 zerothread 62089 352932 0 0 3 0x14200 aiodoned aiodoned 56523 29438 0 0 3 0x14200 syncer update 56929 369526 0 0 3 0x14200 cleaner cleaner 70262 493465 0 0 3 0x14200 reaper reaper 48305 465054 0 0 3 0x14200 pgdaemon pagedaemon 62240 339910 0 0 3 0x14200 bored viomb 67097 511223 0 0 3 0x40014200 acpi0 acpi0 9135 303598 0 0 3 0x40014200 idle1 30925 94935 0 0 3 0x14200 bored softnet1 90969 212653 0 0 3 0x14200 bored softnet0 74208 52292 0 0 3 0x14200 bored systqmp 61131 192917 0 0 3 0x14200 bored systq 77134 177963 0 0 3 0x14200 tmoslp softclockmp 31875 363454 0 0 3 0x40014200 tmoslp softclock 21005 207327 0 0 3 0x40014200 idle0 1 173228 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 11048K 11378K 166960K 11504 0 pcb 19 12K 12K 166960K 40 0 rtable 227 8K 8K 166960K 379 0 pf 38 18K 18K 166960K 51 0 ifaddr 42 6K 7K 166960K 48 0 ifgroup 63 2K 2K 166960K 67 0 sysctl 3 1K 9K 166960K 9 0 counters 72 37K 37K 166960K 74 0 ioctlops 0 0K 4K 166960K 1494 0 iov 0 0K 12K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1343 85K 85K 166960K 1434 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 205 0 sigio 0 0K 0K 166960K 1 0 proc 71 115K 196K 166960K 544 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 1 0 in_multi 88 6K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 380 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 249 163K 173K 166960K 3699 0 UVM aobj 5 2K 4K 166960K 6 0 pinsyscall 43 86K 104K 166960K 1336 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 5 0 NDP 14 0K 2K 166960K 31 0 temp 38 8659K 8722K 166960K 4383 0 kqueue 14 22K 26K 166960K 34 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 36 0 33 1 0 1 1 0 8 0 rtentry 176 111 0 12 5 0 5 5 0 8 0 unpcb 144 135 0 118 2 0 2 2 0 8 1 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 20 0 14 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 116 0 103 2 0 2 2 0 8 0 nd6 152 24 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 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 20 0 0 1 0 1 1 0 8 0 pfstkey 128 20 0 0 1 0 1 1 0 8 0 pfstate 448 20 0 0 3 0 3 3 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 44 29 0 29 29 0 8 2 art_table 40 453 0 44 5 0 5 5 0 8 0 art_node 32 111 0 21 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1700 0 187 95 0 95 95 0 8 0 ffsino 296 1700 0 187 117 0 117 117 0 8 0 nchpl 144 1984 0 279 64 0 64 64 0 8 0 vnodes 216 1828 0 0 102 0 102 102 0 8 0 namei 1024 6116 0 6116 1 0 1 1 0 8 1 percpumem 16 52 0 1 1 0 1 1 0 8 0 vmpool 840 1 0 1 1 0 1 1 0 8 1 kstatmem 264 36 0 2 3 0 3 3 0 8 0 scxspl 216 6820 0 6814 9 2 7 7 1 8 6 plimitpl 152 44 0 26 1 0 1 1 0 8 0 sigapl 424 516 0 467 7 0 7 7 0 8 1 knotepl 120 57 0 0 2 0 2 2 0 8 0 kqueuepl 224 39 0 28 1 0 1 1 0 8 0 pipepl 344 120 0 92 3 0 3 3 0 8 0 fdescpl 528 499 0 467 3 0 3 3 0 8 0 filepl 160 2056 0 1837 15 0 15 15 0 8 5 lockfpl 104 295 0 290 4 0 4 4 0 8 3 lockfspl 48 18 0 15 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 156 0 143 1 0 1 1 0 8 0 zombiepl 144 468 0 467 1 0 1 1 0 8 0 processpl 1232 516 0 467 5 0 5 5 0 8 1 procpl 664 650 0 592 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 289 0 256 5 0 5 5 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 145 0 0 10 0 10 10 0 8 0 bufpl 280 2409 0 131 163 0 163 163 0 8 0 anonpl 32 3773 0 0 31 0 31 31 0 246 0 amapchunkpl 152 10574 0 10073 28 0 28 28 0 158 8 amappl16 200 1659 0 1639 5 2 3 5 0 8 1 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 24 0 24 1 1 0 1 0 8 0 amappl13 176 431 0 429 1 0 1 1 0 8 0 amappl12 168 862 0 820 3 0 3 3 0 8 0 amappl11 160 16 0 16 1 1 0 1 0 8 0 amappl10 152 116 0 102 1 0 1 1 0 8 0 amappl9 144 276 0 276 1 1 0 1 0 8 0 amappl8 136 33 0 31 1 0 1 1 0 8 0 amappl7 128 82 0 81 1 0 1 1 0 8 0 amappl6 120 276 0 262 1 0 1 1 0 8 0 amappl5 112 75 0 65 1 0 1 1 0 8 0 amappl4 104 451 0 423 1 0 1 1 0 8 0 amappl3 96 1727 0 1634 4 1 3 3 0 8 0 amappl2 88 602 0 528 2 0 2 2 0 8 0 amappl1 80 9470 0 8871 15 1 14 14 0 8 1 amappl 88 2951 0 2780 5 0 5 5 0 92 0 uvmvnodes 80 100 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 5 0 1 1 0 1 1 0 8 0 uaddrrnd 24 499 0 467 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 499 0 467 1 0 1 1 0 8 0 vmmpekpl 168 5934 0 5901 2 0 2 2 0 8 0 vmmpepl 168 39639 0 37697 87 0 87 87 0 357 2 vmsppl 488 498 0 467 5 0 5 5 0 8 1 rwobjpl 80 13967 0 12949 23 0 23 23 0 8 0 pdppl 4096 1007 0 936 95 24 71 83 0 8 0 pvpl 32 10440 0 0 85 0 85 85 0 265 0 pmappl 256 499 0 468 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 267 0 26 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8386fff0) 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(ffffffff839641c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839641c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a3ce6a0,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839641c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839641c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002a3ce870) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a3ce870) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ea3ef9a0510, count: 6 ddb{0}> trace x86_ipi_db(ffffffff8386fff0) 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(ffffffff839641c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839641c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a3ce6a0,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839641c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839641c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002a3ce870) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a3ce870) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ea3ef9a0510, count: -9 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_unbind(ffff800001527d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800000b58000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,81,2000,ffff8000fffe9778) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe9778) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2d1e80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c939560,81,fffffd80097fd478,ffff8000fffe9778) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c76d188,ffff8000fffe9778) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c76d188,ffff8000fffe9778) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c76d188,ffff8000fffe9778) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c76d188,ffff8000fffe9778) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9778) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9778,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9778,ffff80002a2d21f0,ffff80002a2d2140) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2d21f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d21f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 end trace frame: 0xffff80002a2d2270, count: 0 ddb{1}> trace witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_unbind(ffff800001527d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800000b58000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,81,2000,ffff8000fffe9778) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe9778) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2d1e80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c939560,81,fffffd80097fd478,ffff8000fffe9778) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c76d188,ffff8000fffe9778) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c76d188,ffff8000fffe9778) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c76d188,ffff8000fffe9778) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c76d188,ffff8000fffe9778) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9778) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9778,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9778,ffff80002a2d21f0,ffff80002a2d2140) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2d21f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d21f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x765304aeb140, count: -15