uvm_fault(0xfffffd806c8aa9a0, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 358502 41112 60929 0x10 0 0 syz-executor dt_ioctl_record_stop(ffff800001648000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c3e2a88) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c3e2a88) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000363a7890) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8064ecbcd8,81,fffffd80097fd208,ffff80003c3e2a88) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8064e54060,ffff80003c3e2a88) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8064e54060,ffff80003c3e2a88) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8064e54060,ffff80003c3e2a88) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd8064e54060,ffff80003c3e2a88) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff80003c3e2a88) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff80003c3e2a88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c3e2a88,ffff8000363a7c00,ffff8000363a7b50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000363a7c00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000363a7c00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4ee557a120, 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: uvm_fault(0xfffffd806c8aa9a0, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff800001648000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c3e2a88) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c3e2a88) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000363a7890) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8064ecbcd8,81,fffffd80097fd208,ffff80003c3e2a88) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8064e54060,ffff80003c3e2a88) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8064e54060,ffff80003c3e2a88) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8064e54060,ffff80003c3e2a88) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd8064e54060,ffff80003c3e2a88) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff80003c3e2a88) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff80003c3e2a88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c3e2a88,ffff8000363a7c00,ffff8000363a7b50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000363a7c00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000363a7c00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4ee557a120, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000363a77c0 rbx 0x1 rdx 0 rcx 0xffff80003c3e2a88 rax 0xffffffff83900020 dt_prov_static r8 0xffffffffffffffff r9 0x1 r10 0x98d089041ddeb9c4 r11 0x67052a203d29e64d r12 0 r13 0 r14 0 r15 0xffff800001640300 rip 0xffffffff83217b98 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff8000363a7790 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=659 pid=92474 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c3e2a88 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c3e3250,0xffff80003c3e34f8 process=0xffff80002a38d828 user=0xffff8000363a2000, vmspace=0xfffffd806c8aa9a0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25186 327220 42199 0 2 0 syz-executor 25186 148352 42199 0 3 0x4000000 biowait syz-executor 94881 215778 42163 0 2 0 syz-executor 94881 267562 42163 0 3 0x4000080 fsleep syz-executor 41112 358502 47023 60929 7 0x10 syz-executor 41112 12126 47023 60929 3 0x4000090 kqsel syz-executor 41112 264162 47023 60929 3 0x4000090 kqsel syz-executor 98058 182115 78661 0 2 0 syz-executor 10370 383869 73590 0 2 0 syz-executor 10370 95371 73590 0 3 0x4000080 fsleep syz-executor 10370 395195 73590 0 3 0x4000080 fsleep syz-executor 73616 168386 31083 0 2 0 syz-executor 73616 413310 31083 0 3 0x4000080 fsleep syz-executor 73616 413710 31083 0 3 0x4000080 fsleep syz-executor 50328 521361 0 0 3 0x14200 acct acct 3680 276219 1 0 3 0x100083 ttyin getty 31083 514546 86013 0 3 0x82 nanoslp syz-executor 83734 43196 86013 0 3 0x82 nanoslp syz-executor 94582 263552 86013 0 3 0x82 nanoslp syz-executor 78661 265896 86013 0 3 0x82 nanoslp syz-executor 73590 178459 86013 0 3 0x82 nanoslp syz-executor 42163 149519 86013 0 3 0x82 nanoslp syz-executor 47023 362010 86013 0 3 0x82 nanoslp syz-executor 42199 141338 86013 0 3 0x82 nanoslp syz-executor 86013 78266 76334 0 3 0x82 kqread syz-executor 76334 404355 25783 0 3 0x10008a sigsusp ksh 25783 395000 57033 0 3 0x98 kqread sshd-session 57033 190757 15947 0 3 0x92 kqread sshd-session 15947 288355 1 0 3 0x88 kqread sshd 87811 72108 52739 74 3 0x1100092 bpf pflogd 52739 374910 1 0 3 0x80 sbwait pflogd 1821 504869 75260 73 3 0x1100090 kqread syslogd 75260 75812 1 0 3 0x100082 sbwait syslogd 22938 244317 1 0 3 0x100080 kqread resolvd 47401 500857 96223 77 3 0x100092 kqread dhcpleased 69948 235140 96223 77 3 0x100092 kqread dhcpleased 96223 148685 1 0 3 0x80 kqread dhcpleased 74200 219095 0 0 3 0x14200 pause smr 13492 319385 0 0 2 0x14200 zerothread 96859 8733 0 0 3 0x14200 aiodoned aiodoned 84979 134373 0 0 3 0x14200 syncer update 80756 350666 0 0 3 0x14200 cleaner cleaner 31313 365366 0 0 3 0x14200 reaper reaper 22923 86933 0 0 3 0x14200 pgdaemon pagedaemon 1910 125937 0 0 3 0x14200 bored viomb 92338 151136 0 0 3 0x40014200 acpi0 acpi0 10948 213764 0 0 3 0x40014200 idle1 85682 443998 0 0 3 0x14200 bored softnet1 87782 173256 0 0 3 0x14200 bored softnet0 45680 187969 0 0 3 0x14200 smrbar systqmp 75875 483300 0 0 3 0x14200 bored systq 98770 284361 0 0 3 0x14200 tmoslp softclockmp 36031 71478 0 0 3 0x40014200 tmoslp softclock 9803 8777 0 0 3 0x40014200 idle0 1 343906 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 25186 (syz-executor) thread 0xffff80003c3e34e8 (148352) exclusive rrwlock inode r = 0 (0xfffffd806c5257b8) #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+0x2bd sys/kern/sys_generic.c:384 #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:783 #9 Xsyscall+0x128 Process 45680 (systqmp) thread 0xffff8000ffffe7c8 (187969) shared rwlock systqmp r = 0 (0xffffffff83867858) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11075 12127K 12403K 166960K 12635 0 pcb 17 12K 12K 166960K 85 0 rtable 229 9K 9K 166960K 488 0 pf 34 17K 20K 166960K 69 0 ifaddr 41 7K 8K 166960K 61 0 ifgroup 55 2K 2K 166960K 85 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 38K 166960K 100 0 ioctlops 0 0K 4K 166960K 1628 0 iov 0 0K 16K 166960K 37 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1357 85K 86K 166960K 1700 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 20 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 110K 166960K 426 0 sigio 0 0K 0K 166960K 4 0 proc 72 115K 147K 166960K 600 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 37 0 in_multi 95 7K 7K 166960K 112 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 475 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 252 167K 186K 166960K 5911 0 UVM aobj 6 2K 2K 166960K 8 0 pinsyscall 43 86K 104K 166960K 1580 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 69 0 NDP 12 0K 2K 166960K 38 0 temp 46 9072K 9155K 166960K 16780 0 kqueue 13 20K 29K 166960K 93 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 120 120 0 117 2 0 2 2 0 8 1 rtentry 176 121 0 27 6 0 6 6 0 8 0 unpcb 144 227 0 210 2 1 1 2 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 74 0 70 1 0 1 1 0 8 0 arp 136 19 0 3 1 0 1 1 0 8 0 inpcb 328 358 0 351 4 0 4 4 0 8 3 nd6 152 25 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 11 0 11 1 0 1 1 0 8 1 pppxif 1504 3 0 3 1 0 1 1 0 8 1 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 3 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 pfsrclim 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 39 0 1 1 0 1 1 0 8 0 pfstkey 128 39 0 1 2 0 2 2 0 8 0 pfstate 448 39 0 1 5 0 5 5 0 8 0 pfrule 1360 22 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 486 0 71 29 0 29 29 0 8 2 art_table 40 488 0 71 5 0 5 5 0 8 0 art_node 32 121 0 37 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 5 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2186 0 722 93 0 93 93 0 8 0 ffsino 296 2186 0 722 114 0 114 114 0 8 0 nchpl 144 2761 0 1059 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 1 0 1 0 8 0 vnodes 216 2466 0 0 137 0 137 137 0 8 0 namei 1024 9289 0 9289 1 0 1 1 0 8 1 percpumem 16 65 0 15 1 0 1 1 0 8 0 kstatmem 264 44 0 18 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 12499 0 12498 9 2 7 8 1 8 6 plimitpl 152 93 0 76 1 0 1 1 0 8 0 sigapl 424 737 0 688 7 1 6 7 0 8 0 knotepl 120 479 0 0 15 0 15 15 0 8 0 kqueuepl 224 112 0 101 1 0 1 1 0 8 0 pipepl 344 144 0 117 3 0 3 3 0 8 0 fdescpl 528 720 0 688 3 0 3 3 0 8 0 filepl 160 3751 0 3531 13 0 13 13 0 8 3 lockfpl 104 281 0 279 1 0 1 1 0 8 0 lockfspl 48 56 0 54 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 351 0 337 1 0 1 1 0 8 0 zombiepl 144 690 0 688 1 0 1 1 0 8 0 processpl 1232 737 0 688 5 1 4 5 0 8 0 procpl 664 1252 0 1195 6 0 6 6 0 8 0 sosppl 176 3 0 3 1 0 1 1 0 8 1 sockpl 752 751 0 724 11 0 11 11 0 8 8 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 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 380 0 0 24 0 24 24 0 8 0 bufpl 280 4714 0 105 330 0 330 330 0 8 0 anonpl 32 9763 0 0 79 0 79 79 0 246 0 amapchunkpl 152 18401 0 17858 29 1 28 29 0 158 5 amappl16 200 3114 0 3080 15 1 14 15 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 430 0 429 1 0 1 1 0 8 0 amappl13 176 125 0 113 1 0 1 1 0 8 0 amappl12 168 974 0 943 2 0 2 2 0 8 0 amappl11 160 51 0 51 1 1 0 1 0 8 0 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 260 0 260 1 1 0 1 0 8 0 amappl8 136 119 0 116 1 0 1 1 0 8 0 amappl7 128 146 0 133 1 0 1 1 0 8 0 amappl6 120 165 0 164 1 0 1 1 0 8 0 amappl5 112 97 0 87 1 0 1 1 0 8 0 amappl4 104 321 0 301 1 0 1 1 0 8 0 amappl3 96 3420 0 3302 4 0 4 4 0 8 0 amappl2 88 548 0 488 2 0 2 2 0 8 0 amappl1 80 11358 0 10748 17 0 17 17 0 8 3 amappl 88 5131 0 4952 5 0 5 5 0 92 0 uvmvnodes 80 113 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 8 0 8 2 2 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 7 0 2 1 0 1 1 0 8 0 uaddrrnd 24 720 0 688 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 720 0 688 1 0 1 1 0 8 0 vmmpekpl 168 7972 0 7934 2 0 2 2 0 8 0 vmmpepl 168 55059 0 53076 107 0 107 107 0 357 11 vmsppl 488 719 0 688 5 0 5 5 0 8 1 rwobjpl 80 18941 0 17874 30 0 30 30 0 8 1 pdppl 4096 1447 0 1376 99 28 71 83 0 8 0 pvpl 32 16934 0 0 138 1 137 137 0 265 0 pmappl 256 719 0 688 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 287 0 31 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8392cff0) 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(ffffffff83997780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83997780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003c42f230,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7323989f1d00, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8392cff0) 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(ffffffff83997780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83997780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003c42f230,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7323989f1d00, count: -6 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff800001648000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c3e2a88) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c3e2a88) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000363a7890) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8064ecbcd8,81,fffffd80097fd208,ffff80003c3e2a88) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8064e54060,ffff80003c3e2a88) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8064e54060,ffff80003c3e2a88) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8064e54060,ffff80003c3e2a88) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd8064e54060,ffff80003c3e2a88) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff80003c3e2a88) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff80003c3e2a88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c3e2a88,ffff8000363a7c00,ffff8000363a7b50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000363a7c00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000363a7c00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4ee557a120, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff800001648000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c3e2a88) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c3e2a88) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000363a7890) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8064ecbcd8,81,fffffd80097fd208,ffff80003c3e2a88) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8064e54060,ffff80003c3e2a88) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8064e54060,ffff80003c3e2a88) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8064e54060,ffff80003c3e2a88) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd8064e54060,ffff80003c3e2a88) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff80003c3e2a88) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff80003c3e2a88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c3e2a88,ffff8000363a7c00,ffff8000363a7b50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000363a7c00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000363a7c00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4ee557a120, count: -12