uvm_fault(0xfffffd800e6bf5d8, 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 350555 41671 0 0x10000002 0x1 0 syz-executor dt_ioctl_record_stop(ffff800001484000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffeba10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffeba10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a304a80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c01a7c0,81,fffffd80097fb548,ffff8000fffeba10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805d3c13c0,ffff8000fffeba10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805d3c13c0,ffff8000fffeba10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805d3c13c0,ffff8000fffeba10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805d3c13c0,ffff8000fffeba10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeba10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeba10,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeba10,ffff80002a304df0,ffff80002a304d40) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a304df0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a304df0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7276f9b16fa0, 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(0xfffffd800e6bf5d8, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff800001484000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffeba10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffeba10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a304a80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c01a7c0,81,fffffd80097fb548,ffff8000fffeba10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805d3c13c0,ffff8000fffeba10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805d3c13c0,ffff8000fffeba10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805d3c13c0,ffff8000fffeba10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805d3c13c0,ffff8000fffeba10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeba10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeba10,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeba10,ffff80002a304df0,ffff80002a304d40) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a304df0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a304df0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7276f9b16fa0, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3049b0 rbx 0x1 rdx 0 rcx 0xffff8000fffeba10 rax 0xffffffff8380c578 dt_prov_syscall r8 0xffffffffffffffff r9 0x1 r10 0xbb38baa27052d48d r11 0x1b7670a0b6ba9792 r12 0 r13 0 r14 0 r15 0xffff80000150da00 rip 0xffffffff81eb4db8 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80002a304980 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=287170 pid=33118 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffeba10 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffe3780,0xffffffff8388d730 process=0xffff80003c4aab78 user=0xffff80002a2ff000, vmspace=0xfffffd800e6bf5d8 estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62036 215614 53535 0 3 0x80 nanoslp syz-executor 62036 326854 53535 0 3 0x4000080 kqsel syz-executor 62036 479111 53535 0 3 0x4000080 ttyin syz-executor 62036 240239 53535 0 3 0x4000080 fsleep syz-executor 60501 187899 7634 0 3 0x80 nanoslp syz-executor 60501 241055 7634 0 3 0x4000080 sbwait syz-executor 60501 277461 7634 0 3 0x4000080 fsleep syz-executor 47874 94505 0 0 3 0x14200 acct acct 53535 406621 98393 0 3 0x82 nanoslp syz-executor 50943 396572 1 0 3 0x100083 ttyopn getty 92141 207898 0 0 3 0x14200 bored sosplice 52364 443404 29598 0 3 0x100082 sbwait ndp 29598 378305 11747 0 3 0x10008a sigsusp sh 29841 422593 98393 0 3 0x82 wait syz-executor 7634 32529 98393 0 3 0x82 nanoslp syz-executor 11747 361009 98393 0 3 0x82 wait syz-executor 41671 350555 98393 0 7 0x10000003 syz-executor 15028 375687 98393 0 3 0x82 wait syz-executor 89418 349181 98393 0 3 0x82 nanoslp syz-executor 32503 261622 98393 0 3 0x82 nanoslp syz-executor 98393 381697 13670 0 3 0x82 kqread syz-executor 13670 189594 91421 0 3 0x10008a sigsusp ksh 91421 44317 46805 0 3 0x98 kqread sshd-session 46805 270943 30598 0 3 0x92 kqread sshd-session 30598 469187 1 0 3 0x88 kqread sshd 17628 17079 5533 74 3 0x1100092 bpf pflogd 5533 153985 1 0 3 0x80 sbwait pflogd 22114 62155 91261 73 3 0x1100090 kqread syslogd 91261 375873 1 0 3 0x100082 sbwait syslogd 6358 52524 1 0 3 0x100080 kqread resolvd 92087 347955 61700 77 3 0x100092 kqread dhcpleased 59234 431077 61700 77 3 0x100092 kqread dhcpleased 61700 180052 1 0 3 0x80 kqread dhcpleased 40412 334745 0 0 3 0x14200 bored smr 85452 164495 0 0 2 0x14200 zerothread 32876 441525 0 0 3 0x14200 aiodoned aiodoned 47849 397619 0 0 3 0x14200 syncer update 86186 506618 0 0 3 0x14200 cleaner cleaner 60630 362259 0 0 3 0x14200 reaper reaper 75728 461309 0 0 3 0x14200 pgdaemon pagedaemon 81747 266701 0 0 3 0x14200 bored viomb 68013 451738 0 0 3 0x40014200 acpi0 acpi0 4960 84192 0 0 3 0x40014200 idle1 5955 178522 0 0 3 0x14200 bored softnet1 84383 118782 0 0 3 0x14200 bored softnet0 12360 384627 0 0 3 0x14200 bored systqmp 51860 124829 0 0 3 0x14200 bored systq 41278 474786 0 0 3 0x14200 tmoslp softclockmp 7439 378659 0 0 3 0x40014200 tmoslp softclock 69575 399742 0 0 3 0x40014200 idle0 1 173393 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10225 11087K 11207K 166960K 11792 0 pcb 18 14K 15K 166960K 188 0 rtable 200 9K 9K 166960K 502 0 pf 39 18K 24K 166960K 117 0 ifaddr 38 6K 7K 166960K 81 0 ifgroup 59 2K 3K 166960K 125 0 sysctl 3 1K 9K 166960K 9 0 counters 70 37K 38K 166960K 126 0 ioctlops 0 0K 8K 166960K 1596 0 iov 0 0K 16K 166960K 104 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1374 86K 87K 166960K 1904 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 36 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 743 0 sigio 0 0K 0K 166960K 7 0 proc 75 131K 164K 166960K 665 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 77 0 in_multi 74 5K 7K 166960K 146 0 ether_multi 1 0K 0K 166960K 9 0 mrt 0 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 700 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 262 171K 183K 166960K 8717 0 UVM aobj 26 2K 4K 166960K 28 0 pinsyscall 44 88K 102K 166960K 1912 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 46 0 NDP 14 0K 1K 166960K 53 0 temp 61 8651K 8722K 166960K 39693 0 kqueue 13 20K 29K 166960K 154 0 SYN cache 2 16K 24K 166960K 3 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 76 0 72 1 0 1 1 0 8 0 rtentry 176 152 0 73 5 0 5 5 0 8 0 unpcb 144 486 0 468 6 0 6 6 0 8 5 syncache 336 6 0 6 3 2 1 1 0 8 1 tcpcb 736 163 0 159 1 0 1 1 0 8 0 arp 136 25 0 10 1 0 1 1 0 8 0 inpcb 328 954 0 946 13 6 7 7 0 8 6 nd6 152 28 0 12 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 20 0 20 2 1 1 1 0 8 1 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pfstscr 40 69 0 68 1 0 1 1 0 8 0 pffrag 232 6 0 1 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 7 0 2 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 66 0 16 1 0 1 1 0 8 0 pfstkey 128 102 0 51 2 0 2 2 0 8 0 pfstate 384 98 0 50 5 0 5 5 0 8 0 pfrule 1344 26 0 22 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 706 0 371 31 6 25 31 0 8 3 art_table 40 710 0 371 5 0 5 5 0 8 0 art_node 32 152 0 82 1 0 1 1 0 8 0 sysvmsgpl 40 75 0 70 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 25 0 2 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2872 0 1360 95 0 95 95 0 8 0 ffsino 296 2872 0 1360 117 0 117 117 0 8 0 nchpl 144 3939 0 2235 64 0 64 64 0 8 0 rtmask 32 5 0 5 2 1 1 1 0 8 1 vnodes 216 3148 0 0 175 0 175 175 0 8 0 namei 1024 13527 0 13527 2 1 1 2 0 8 1 percpumem 16 78 0 28 1 0 1 1 0 8 0 kstatmem 264 74 0 42 3 0 3 3 0 8 0 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 27827 0 27827 12 11 1 8 1 8 1 plimitpl 152 378 0 359 1 0 1 1 0 8 0 sigapl 424 1079 0 1028 9 2 7 8 0 8 1 knotepl 120 570 0 0 18 0 18 18 0 8 0 kqueuepl 224 320 0 309 7 5 2 5 0 8 1 pipepl 344 211 0 182 6 3 3 6 0 8 0 fdescpl 528 1037 0 1005 3 0 3 3 0 8 0 filepl 160 6976 0 6745 22 5 17 17 0 8 5 lockfpl 104 232 0 229 1 0 1 1 0 8 0 lockfspl 48 96 0 93 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 44 0 27 1 0 1 1 0 8 0 ucredpl 104 1083 0 1069 1 0 1 1 0 8 0 zombiepl 144 1033 0 1028 1 0 1 1 0 8 0 processpl 1232 1079 0 1028 6 0 6 6 0 8 0 procpl 664 2160 0 2104 8 1 7 8 0 8 1 sosppl 168 6 0 6 2 1 1 1 0 8 1 sockpl 752 1528 0 1498 28 16 12 17 0 8 8 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 106 0 0 14 0 14 14 0 8 0 mcl2k 2048 45 0 0 6 0 6 6 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1175 0 0 73 0 73 73 0 8 0 bufpl 280 11630 0 5493 439 0 439 439 0 8 0 anonpl 32 11634 0 0 94 0 94 94 0 246 0 amapchunkpl 152 28019 0 27503 28 1 27 27 0 158 5 amappl16 200 4407 0 4378 45 30 15 28 0 8 8 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 10 0 10 3 2 1 1 0 8 1 amappl13 176 454 0 452 1 0 1 1 0 8 0 amappl12 168 1416 0 1372 3 0 3 3 0 8 0 amappl11 160 10 0 10 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 278 0 278 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 84 0 82 1 0 1 1 0 8 0 amappl6 120 299 0 284 1 0 1 1 0 8 0 amappl5 112 83 0 72 1 0 1 1 0 8 0 amappl4 104 441 0 410 1 0 1 1 0 8 0 amappl3 96 4868 0 4771 4 1 3 3 0 8 0 amappl2 88 1172 0 1095 2 0 2 2 0 8 0 amappl1 80 12591 0 11962 15 0 15 15 0 8 0 amappl 88 7841 0 7664 5 0 5 5 0 92 0 uvmvnodes 80 3148 0 0 65 0 65 65 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 2 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 27 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1037 0 1005 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1037 0 1005 1 0 1 1 0 8 0 vmmpekpl 168 10394 0 10351 3 0 3 3 0 8 0 vmmpepl 168 74547 0 72564 115 6 109 115 0 357 6 vmsppl 488 1036 0 1005 5 0 5 5 0 8 0 rwobjpl 80 26367 0 22202 88 0 88 88 0 8 0 pdppl 4096 2081 0 2010 101 26 75 83 0 8 4 pvpl 32 19482 0 0 158 0 158 158 0 265 0 pmappl 256 1036 0 1005 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 343 0 38 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83873ff0) 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(ffffffff8388d4e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388d4e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff8388d4e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388d4e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsysret(ffff8000ffff3ca0,5b,4,ffff80002a376a90) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffff3ca0,5b,4,ffff80002a376a90) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a376b40) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a376b40) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:769 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dcf224d6c20, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83873ff0) 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(ffffffff8388d4e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388d4e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff8388d4e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388d4e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsysret(ffff8000ffff3ca0,5b,4,ffff80002a376a90) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffff3ca0,5b,4,ffff80002a376a90) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a376b40) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a376b40) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:769 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dcf224d6c20, count: -11 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff800001484000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffeba10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffeba10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a304a80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c01a7c0,81,fffffd80097fb548,ffff8000fffeba10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805d3c13c0,ffff8000fffeba10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805d3c13c0,ffff8000fffeba10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805d3c13c0,ffff8000fffeba10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805d3c13c0,ffff8000fffeba10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeba10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeba10,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeba10,ffff80002a304df0,ffff80002a304d40) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a304df0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a304df0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7276f9b16fa0, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff800001484000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffeba10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffeba10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a304a80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c01a7c0,81,fffffd80097fb548,ffff8000fffeba10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805d3c13c0,ffff8000fffeba10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805d3c13c0,ffff8000fffeba10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805d3c13c0,ffff8000fffeba10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805d3c13c0,ffff8000fffeba10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeba10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeba10,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeba10,ffff80002a304df0,ffff80002a304d40) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a304df0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a304df0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7276f9b16fa0, count: -12