uvm_fault(0xfffffd806c904d78, 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 176289 11471 0 0 0x4000000 0 syz-executor dt_ioctl_record_stop(ffff80000148d000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c42dfc0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8063225da8,81,fffffd80097fd410,ffff8000fffe8a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806088aa68,ffff8000fffe8a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806088aa68,ffff8000fffe8a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806088aa68,ffff8000fffe8a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806088aa68,ffff8000fffe8a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe8a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe8a80,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe8a80,ffff80003c42e330,ffff80003c42e280) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c42e330) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42e330) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761f85630fc0, 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(0xfffffd806c904d78, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff80000148d000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c42dfc0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8063225da8,81,fffffd80097fd410,ffff8000fffe8a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806088aa68,ffff8000fffe8a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806088aa68,ffff8000fffe8a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806088aa68,ffff8000fffe8a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806088aa68,ffff8000fffe8a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe8a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe8a80,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe8a80,ffff80003c42e330,ffff80003c42e280) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c42e330) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42e330) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761f85630fc0, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c42def0 rbx 0x1 rdx 0 rcx 0xffff8000fffe8a80 rax 0xffffffff837e6e08 dt_prov_syscall r8 0 r9 0 r10 0x70b895534262ff26 r11 0xbe3c069d96f252e3 r12 0 r13 0 r14 0 r15 0xffff8000014dbb00 rip 0xffffffff81406498 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c42dec0 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=180320 pid=53252 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffe8a80 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffe94e0,0xffff8000fffe8d28 process=0xffff8000fffe66a0 user=0xffff80003c429000, vmspace=0xfffffd806c904d78 estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65286 400560 51167 0 4 0x82000 syz-executor 65286 512198 51167 0 4 0x4082000 syz-executor 65286 413086 51167 0 2 0x4082000 syz-executor 65286 23484 51167 0 3 0x4002000 suspend syz-executor 11471 377962 88805 0 2 0 syz-executor 11471 277476 88805 0 3 0x4000080 fsleep syz-executor 11471 176289 88805 0 7 0x4000000 syz-executor 11174 150842 4972 60929 2 0x10 syz-executor 11174 156778 4972 60929 3 0x4000090 fsleep syz-executor 11174 459500 4972 60929 3 0x4000090 fsleep syz-executor 86951 518108 17979 0 2 0xc80 syz-executor 86951 380297 17979 0 2 0x4000000 syz-executor 86951 93892 17979 0 3 0x4000080 fsleep syz-executor 86951 127676 17979 0 3 0x4000080 fsleep syz-executor 86951 308160 17979 0 3 0x4000080 fsleep syz-executor 307 23818 1 0 3 0x100083 ttyopn getty 51167 521261 15452 0 2 0xc82 syz-executor 17979 22443 15452 0 2 0xc82 syz-executor 88805 171395 15452 0 2 0xc82 syz-executor 58704 226789 15452 0 3 0x82 nanoslp syz-executor 4972 19005 15452 0 3 0x82 nanoslp syz-executor 28209 254789 15452 0 2 0xc82 syz-executor 54692 277256 15452 0 2 0x10000082 syz-executor 83456 485655 15452 0 2 0x10000c82 syz-executor 15452 160492 79684 0 3 0x82 kqread syz-executor 79684 219983 84296 0 3 0x10008a sigsusp ksh 84296 332365 50758 0 3 0x98 kqread sshd-session 50758 512145 17103 0 3 0x92 kqread sshd-session 17103 169647 1 0 3 0x88 kqread sshd 24930 163421 69179 74 3 0x1100092 bpf pflogd 69179 36455 1 0 3 0x80 sbwait pflogd 266 5498 76092 73 3 0x1100090 kqread syslogd 76092 164772 1 0 3 0x100082 sbwait syslogd 88112 436860 1 0 3 0x100080 kqread resolvd 39351 13311 74577 77 3 0x100092 kqread dhcpleased 70472 7193 74577 77 3 0x100092 kqread dhcpleased 74577 115598 1 0 3 0x80 kqread dhcpleased 35485 276837 0 0 2 0x40014200 smr 43432 171038 0 0 3 0x14200 pgzero zerothread 62061 296265 0 0 3 0x14200 aiodoned aiodoned 37460 501534 0 0 3 0x14200 syncer update 28749 514574 0 0 3 0x14200 cleaner cleaner 88558 125661 0 0 3 0x14200 reaper reaper 95946 272139 0 0 3 0x14200 pgdaemon pagedaemon 72499 421053 0 0 3 0x14200 bored viomb 40577 93265 0 0 3 0x40014200 acpi0 acpi0 74068 259733 0 0 3 0x40014200 idle1 8687 122753 0 0 3 0x14200 bored softnet1 47525 249357 0 0 3 0x14200 bored softnet0 11829 415507 0 0 3 0x14200 smrbar systqmp 36014 427322 0 0 3 0x14200 bored systq 42419 376932 0 0 2 0x14200 softclockmp 96464 392374 0 0 3 0x40014200 tmoslp softclock 11693 389913 0 0 3 0x40014200 idle0 1 288624 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 86951 (syz-executor) thread 0xffff8000fffe8fb0 (380297) exclusive rrwlock inode r = 0 (0xfffffd806ca38c70) #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+0xa3 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+0x242 sys/kern/sys_generic.c:380 #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:775 #9 Xsyscall+0x128 Process 11829 (systqmp) thread 0xffff8000ffffef90 (415507) shared rwlock systqmp r = 0 (0xffffffff83868a28) #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 10199 11039K 11431K 166960K 11654 0 pcb 17 12K 12K 166960K 62 0 rtable 229 8K 9K 166960K 418 0 pf 33 17K 22K 166960K 80 0 ifaddr 39 6K 8K 166960K 59 0 ifgroup 51 2K 2K 166960K 83 0 sysctl 3 1K 9K 166960K 8 0 counters 68 36K 38K 166960K 104 0 ioctlops 0 0K 4K 166960K 1599 0 iov 0 0K 12K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1503 95K 95K 166960K 1757 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 6 136K 136K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 85K 166960K 393 0 sigio 0 0K 0K 166960K 5 0 proc 73 131K 180K 166960K 567 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 36 0 in_multi 88 6K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 420 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 250 152K 161K 166960K 5408 0 UVM aobj 7 2K 2K 166960K 8 0 pinsyscall 41 82K 100K 166960K 1524 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 14 0 NDP 11 0K 1K 166960K 39 0 temp 49 8669K 8733K 166960K 20108 0 kqueue 15 22K 28K 166960K 70 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 59 0 55 1 0 1 1 0 8 0 rtentry 176 113 0 13 6 0 6 6 0 8 0 unpcb 144 290 0 273 6 0 6 6 0 8 5 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 70 0 65 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 332 0 323 7 5 2 7 0 8 1 nd6 152 25 0 3 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 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1192 15 0 15 1 0 1 1 0 8 1 pppxif 1504 2 0 2 1 0 1 1 0 8 1 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 4 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 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 33 0 0 1 0 1 1 0 8 0 pfstkey 128 33 0 0 2 0 2 2 0 8 0 pfstate 448 33 0 0 4 0 4 4 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 460 0 6 29 0 29 29 0 8 0 art_table 40 461 0 6 5 0 5 5 0 8 0 art_node 32 113 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 7 2 1 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 5 0 1 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2112 0 597 96 0 96 96 0 8 0 ffsino 296 2112 0 597 118 0 118 118 0 8 1 nchpl 144 2695 0 988 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 0 1 1 0 8 1 vnodes 216 2452 0 0 137 0 137 137 0 8 0 namei 1024 8566 0 8565 2 1 1 1 0 8 0 percpumem 16 67 0 18 1 0 1 1 0 8 0 kstatmem 264 48 0 24 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 9492 0 9492 8 2 6 6 1 8 6 plimitpl 152 162 0 144 1 0 1 1 0 8 0 sigapl 424 703 0 655 7 1 6 7 0 8 0 knotepl 120 318 0 0 10 0 10 10 0 8 0 kqueuepl 224 169 0 159 5 0 5 5 0 8 4 pipepl 344 139 0 109 3 0 3 3 0 8 0 fdescpl 528 687 0 657 3 0 3 3 0 8 0 filepl 160 3519 0 3255 17 2 15 15 0 8 3 lockfpl 104 227 0 224 2 0 2 2 0 8 1 lockfspl 48 106 0 103 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 435 0 421 1 0 1 1 0 8 0 zombiepl 144 659 0 655 2 1 1 1 0 8 0 processpl 1232 703 0 655 5 0 5 5 0 8 0 procpl 664 1173 0 1114 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 1 0 1 0 8 0 sockpl 752 693 0 663 23 12 11 17 0 8 8 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 104 0 0 13 0 13 13 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 13 0 0 1 0 1 1 0 8 0 mbufpl 256 1171 0 0 74 0 74 74 0 8 0 bufpl 280 4369 0 129 303 0 303 303 0 8 0 anonpl 32 7531 0 0 61 0 61 61 0 246 0 amapchunkpl 152 16482 0 15938 26 0 26 26 0 158 2 amappl16 200 2529 0 2478 18 6 12 15 0 8 8 amappl15 192 46 0 46 1 1 0 1 0 8 0 amappl14 184 7 0 7 2 1 1 1 0 8 1 amappl13 176 471 0 470 1 0 1 1 0 8 0 amappl12 168 1047 0 1006 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 49 0 34 1 0 1 1 0 8 0 amappl9 144 339 0 339 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 82 0 81 1 0 1 1 0 8 0 amappl6 120 283 0 270 1 0 1 1 0 8 0 amappl5 112 72 0 61 1 0 1 1 0 8 0 amappl4 104 418 0 389 1 0 1 1 0 8 0 amappl3 96 3087 0 2977 5 1 4 4 0 8 0 amappl2 88 539 0 479 2 0 2 2 0 8 0 amappl1 80 10177 0 9589 14 0 14 14 0 8 1 amappl 88 4644 0 4471 5 0 5 5 0 92 0 uvmvnodes 80 106 0 0 3 0 3 3 0 8 0 dma32768 32768 1 0 1 1 1 0 1 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 687 0 657 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 687 0 657 1 0 1 1 0 8 0 vmmpekpl 168 7337 0 7295 3 0 3 3 0 8 0 vmmpepl 168 51112 0 49193 97 0 97 97 0 357 8 vmsppl 488 686 0 657 5 1 4 5 0 8 0 rwobjpl 80 16861 0 15791 27 0 27 27 0 8 3 pdppl 4096 1381 0 1314 93 22 71 81 0 8 4 pvpl 32 14557 0 0 119 1 118 118 0 265 0 pmappl 256 686 0 657 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 330 0 27 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83879ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x50 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x50 sys/dev/kcov.c:153 __mp_lock(ffffffff83a10328) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a10328) at __mp_lock+0x1a3 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:862 Xsoftclock() at Xsoftclock+0x27 kqueue_register(fffffd806f958540,ffff80003b7ec4c0,0,ffff80002a27b240) at kqueue_register+0x12b0 sys/kern/kern_event.c:1592 sys_kevent(ffff80002a27b240,ffff80003b7ec7e0,ffff80003b7ec730) at sys_kevent+0x3bc sys/kern/kern_event.c:1285 syscall(ffff80003b7ec7e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b7ec7e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x768b89e57c0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff83879ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x50 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x50 sys/dev/kcov.c:153 __mp_lock(ffffffff83a10328) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a10328) at __mp_lock+0x1a3 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:862 Xsoftclock() at Xsoftclock+0x27 kqueue_register(fffffd806f958540,ffff80003b7ec4c0,0,ffff80002a27b240) at kqueue_register+0x12b0 sys/kern/kern_event.c:1592 sys_kevent(ffff80002a27b240,ffff80003b7ec7e0,ffff80003b7ec730) at sys_kevent+0x3bc sys/kern/kern_event.c:1285 syscall(ffff80003b7ec7e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b7ec7e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x768b89e57c0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff80000148d000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c42dfc0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8063225da8,81,fffffd80097fd410,ffff8000fffe8a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806088aa68,ffff8000fffe8a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806088aa68,ffff8000fffe8a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806088aa68,ffff8000fffe8a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806088aa68,ffff8000fffe8a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe8a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe8a80,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe8a80,ffff80003c42e330,ffff80003c42e280) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c42e330) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42e330) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761f85630fc0, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff80000148d000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c42dfc0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8063225da8,81,fffffd80097fd410,ffff8000fffe8a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806088aa68,ffff8000fffe8a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806088aa68,ffff8000fffe8a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806088aa68,ffff8000fffe8a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806088aa68,ffff8000fffe8a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe8a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe8a80,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe8a80,ffff80003c42e330,ffff80003c42e280) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c42e330) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42e330) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761f85630fc0, count: -12