uvm_fault(0xfffffd806c66c9a8, 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 510844 57012 0 0 0 0 syz-executor * 17597 57012 0 0 0x4000000 1K syz-executor dt_ioctl_record_stop(ffff800001643000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80003bfd27f8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003bfd27f8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c403a70) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8060152e68,81,fffffd80097fd3a8,ffff80003bfd27f8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8068824b98,ffff80003bfd27f8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8068824b98,ffff80003bfd27f8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8068824b98,ffff80003bfd27f8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd8068824b98,ffff80003bfd27f8) at closef+0x192 sys/kern/kern_descrip.c:1265 syscall(ffff80003c403cd0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c403cd0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x306ba3ebef0, count: 6 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(0xfffffd806c66c9a8, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff800001643000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80003bfd27f8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003bfd27f8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c403a70) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8060152e68,81,fffffd80097fd3a8,ffff80003bfd27f8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8068824b98,ffff80003bfd27f8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8068824b98,ffff80003bfd27f8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8068824b98,ffff80003bfd27f8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd8068824b98,ffff80003bfd27f8) at closef+0x192 sys/kern/kern_descrip.c:1265 syscall(ffff80003c403cd0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c403cd0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x306ba3ebef0, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4039a0 rbx 0x1 rdx 0 rcx 0xffff80003bfd27f8 rax 0xffffffff838a6398 dt_prov_syscall r8 0xa0 r9 0x1 r10 0xe430ff0f8518255 r11 0x1d6fdfdda5ba4acd r12 0 r13 0 r14 0 r15 0xffff80000165bd00 rip 0xffffffff81866cb8 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c403970 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=17597 pid=57012 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3e54e8,0xffffffff83a21e08 process=0xffff80003c3e39e0 user=0xffff80003c3fe000, vmspace=0xfffffd806c66c9a8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 21281 489026 2277 0 2 0 syz-executor 54944 323266 52323 0 2 0 syz-executor 57012 510844 2224 0 7 0 syz-executor 57012 17875 2224 0 2 0x4000000 syz-executor 57012 512373 2224 0 3 0x4000080 fsleep syz-executor *57012 17597 2224 0 7 0x4000000 syz-executor 36570 185050 94298 0 2 0 syz-executor 36570 404938 94298 0 3 0x4000080 fsleep syz-executor 12905 501585 65018 0 2 0 syz-executor 12905 403569 65018 0 2 0x4000000 syz-executor 39309 293971 40108 -1 3 0x90 nanoslp syz-executor 39309 513446 40108 -1 3 0x4000090 lockf syz-executor 39309 384229 40108 -1 3 0x4000090 fsleep syz-executor 2277 243418 38173 0 3 0x82 nanoslp syz-executor 65018 75008 38173 0 3 0x82 nanoslp syz-executor 40108 315152 38173 0 3 0x82 nanoslp syz-executor 31527 504385 38173 0 2 0x2 syz-executor 52323 500107 38173 0 3 0x82 nanoslp syz-executor 94298 259487 38173 0 3 0x82 nanoslp syz-executor 70263 192394 38173 0 3 0x82 wait syz-executor 2224 236423 38173 0 3 0x82 nanoslp syz-executor 38173 436377 22728 0 3 0x82 kqread syz-executor 22728 458395 17857 0 3 0x10008a sigsusp ksh 17857 406495 94092 0 3 0x98 kqread sshd-session 94092 205222 65748 0 3 0x92 kqread sshd-session 60261 102757 1 0 3 0x100083 ttyopn getty 65748 83125 1 0 3 0x88 kqread sshd 37423 347222 49820 74 3 0x1100092 bpf pflogd 49820 344364 1 0 3 0x80 sbwait pflogd 75268 230767 67072 73 3 0x1100090 kqread syslogd 67072 279378 1 0 3 0x100082 sbwait syslogd 37475 260872 1 0 3 0x100080 kqread resolvd 68162 100005 88063 77 3 0x100092 kqread dhcpleased 25868 42510 88063 77 3 0x100092 kqread dhcpleased 88063 193124 1 0 3 0x80 kqread dhcpleased 19352 436149 0 0 3 0x14200 bored smr 56016 121924 0 0 2 0x14200 zerothread 88567 76352 0 0 3 0x14200 aiodoned aiodoned 87527 315832 0 0 3 0x14200 syncer update 50672 250703 0 0 3 0x14200 cleaner cleaner 8394 424739 0 0 3 0x14200 reaper reaper 15194 350741 0 0 3 0x14200 pgdaemon pagedaemon 77906 489843 0 0 3 0x14200 bored viomb 2319 179991 0 0 3 0x40014200 acpi0 acpi0 4981 3980 0 0 3 0x40014200 idle1 92797 24107 0 0 3 0x14200 bored softnet1 21294 23003 0 0 3 0x14200 bored softnet0 95269 207970 0 0 3 0x14200 bored systqmp 23566 67008 0 0 3 0x14200 bored systq 29891 125473 0 0 3 0x14200 tmoslp softclockmp 65355 234489 0 0 3 0x40014200 tmoslp softclock 17718 103258 0 0 3 0x40014200 idle0 1 63107 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 57012 (syz-executor) thread 0xffff80003bfd27f8 (17597) exclusive rwlock dtlk r = 0 (0xffffffff83895ce8) #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 dt_ioctl_record_stop+0x2e sys/dev/dt/dt_dev.c:572 #3 dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #3 dtclose+0x109 sys/dev/dt/dt_dev.c:239 #4 spec_close+0x466 sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #7 fdrop+0x121 sys/kern/kern_descrip.c:1281 #8 closef+0x192 sys/kern/kern_descrip.c:1265 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83aacc40) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 vn_closefile+0x41 sys/kern/vfs_vnops.c:608 #2 fdrop+0x121 sys/kern/kern_descrip.c:1281 #3 closef+0x192 sys/kern/kern_descrip.c:1265 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #5 Xsyscall+0x128 Process 31527 (syz-executor) thread 0xffff8000fffefca0 (504385) exclusive rwlock vmmaplk r = 0 (0xfffffd806c66c308) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3752 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd800b063e58) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3743 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11083 12207K 12214K 166960K 12267 0 pcb 17 12K 12K 166960K 33 0 rtable 229 15K 15K 166960K 380 0 pf 39 18K 20K 166960K 61 0 ifaddr 41 7K 7K 166960K 53 0 ifgroup 59 2K 2K 166960K 73 0 sysctl 1 1K 9K 166960K 5 0 counters 72 37K 37K 166960K 82 0 ioctlops 0 0K 4K 166960K 1504 0 iov 0 0K 12K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1294 81K 82K 166960K 1451 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 8 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 252 0 proc 72 115K 164K 166960K 568 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 11 0 in_multi 88 6K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 386 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 225 159K 173K 166960K 4119 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 43 86K 105K 166960K 1389 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 12 0 NDP 13 0K 2K 166960K 33 0 temp 38 9078K 9143K 166960K 6830 0 kqueue 13 20K 24K 166960K 39 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 41 0 38 1 0 1 1 0 8 0 rtentry 176 112 0 13 6 1 5 6 0 8 0 unpcb 144 82 0 65 1 0 1 1 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 41 0 36 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 148 0 139 2 0 2 2 0 8 1 nd6 152 24 0 3 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 3 0 3 2 1 1 1 0 8 1 pppxif 1576 1 0 1 1 1 0 1 0 8 0 pfstscr 40 4 0 4 2 1 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstlim 224 1 0 1 1 1 0 1 0 8 0 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 29 0 0 1 0 1 1 0 8 0 pfstkey 128 34 0 5 1 0 1 1 0 8 0 pfstate 448 32 0 3 4 0 4 4 0 8 0 pfrule 1360 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 256 457 0 50 29 0 29 29 0 8 2 art_table 40 458 0 50 5 0 5 5 0 8 0 art_node 32 112 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 7 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1795 0 327 93 0 93 93 0 8 0 ffsino 296 1795 0 327 114 0 114 114 0 8 0 nchpl 144 2156 0 454 64 0 64 64 0 8 0 vnodes 216 1926 0 0 107 0 107 107 0 8 0 namei 1024 6804 0 6803 3 2 1 2 0 8 0 percpumem 16 56 0 5 1 0 1 1 0 8 0 kstatmem 264 38 0 8 3 0 3 3 0 8 0 scxspl 216 7628 0 7628 9 8 1 8 1 8 1 plimitpl 152 44 0 27 1 0 1 1 0 8 0 sigapl 424 564 0 516 7 1 6 7 0 8 0 knotepl 120 64 0 0 2 0 2 2 0 8 0 kqueuepl 224 56 0 46 1 0 1 1 0 8 0 pipepl 344 126 0 99 3 0 3 3 0 8 0 fdescpl 528 548 0 516 3 0 3 3 0 8 0 filepl 160 2237 0 2015 12 1 11 11 0 8 0 lockfpl 104 57 0 52 1 0 1 1 0 8 0 lockfspl 48 24 0 21 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 308 0 294 1 0 1 1 0 8 0 zombiepl 144 543 0 542 1 0 1 1 0 8 0 processpl 1232 564 0 516 5 0 5 5 0 8 0 procpl 664 760 0 705 7 1 6 6 0 8 0 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 275 0 246 4 0 4 4 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 181 0 0 12 0 12 12 0 8 0 bufpl 280 2590 0 105 178 0 178 178 0 8 0 anonpl 32 4961 0 0 40 0 40 40 0 246 0 amapchunkpl 152 12330 0 11874 34 6 28 28 0 158 9 amappl16 200 2164 0 2139 9 2 7 7 0 8 3 amappl15 192 6 0 5 1 0 1 1 0 8 0 amappl14 184 491 0 490 1 0 1 1 0 8 0 amappl13 176 118 0 105 1 0 1 1 0 8 0 amappl12 168 817 0 787 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 65 0 51 1 0 1 1 0 8 0 amappl9 144 284 0 284 1 1 0 1 0 8 0 amappl8 136 115 0 113 1 0 1 1 0 8 0 amappl7 128 148 0 135 1 0 1 1 0 8 0 amappl6 120 163 0 162 1 0 1 1 0 8 0 amappl5 112 106 0 96 1 0 1 1 0 8 0 amappl4 104 288 0 267 1 0 1 1 0 8 0 amappl3 96 2213 0 2104 4 0 4 4 0 8 0 amappl2 88 532 0 468 2 0 2 2 0 8 0 amappl1 80 9724 0 9115 15 1 14 15 0 8 0 amappl 88 3392 0 3238 5 0 5 5 0 92 0 uvmvnodes 80 103 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 548 0 516 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 548 0 516 1 0 1 1 0 8 0 vmmpekpl 168 6171 0 6140 2 0 2 2 0 8 0 vmmpepl 168 42716 0 40786 91 0 91 91 0 357 3 vmsppl 488 547 0 516 5 1 4 5 0 8 0 rwobjpl 80 15097 0 14067 24 0 24 24 0 8 0 pdppl 4096 1103 0 1032 99 28 71 85 0 8 0 pvpl 32 12217 0 0 100 1 99 100 0 265 0 pmappl 256 547 0 516 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 275 0 34 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838f0ff0) 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(ffffffff83aac440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83aac440) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7da21da76e60, count: 8 ddb{0}> trace x86_ipi_db(ffffffff838f0ff0) 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(ffffffff83aac440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83aac440) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7da21da76e60, count: -7 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff800001643000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80003bfd27f8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003bfd27f8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c403a70) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8060152e68,81,fffffd80097fd3a8,ffff80003bfd27f8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8068824b98,ffff80003bfd27f8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8068824b98,ffff80003bfd27f8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8068824b98,ffff80003bfd27f8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd8068824b98,ffff80003bfd27f8) at closef+0x192 sys/kern/kern_descrip.c:1265 syscall(ffff80003c403cd0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c403cd0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x306ba3ebef0, count: 6 ddb{1}> trace dt_ioctl_record_stop(ffff800001643000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80003bfd27f8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003bfd27f8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c403a70) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8060152e68,81,fffffd80097fd3a8,ffff80003bfd27f8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8068824b98,ffff80003bfd27f8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8068824b98,ffff80003bfd27f8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8068824b98,ffff80003bfd27f8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd8068824b98,ffff80003bfd27f8) at closef+0x192 sys/kern/kern_descrip.c:1265 syscall(ffff80003c403cd0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c403cd0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x306ba3ebef0, count: -9