uvm_fault(0xfffffd806b969d70, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 TID PID UID PRFLAGS PFLAGS CPU COMMAND 290387 28993 0 0 0 0 syz-executor dt_ioctl_record_stop(ffff800001485000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c452550) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c452550) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800036007ab0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b581898,81,fffffd80097fb680,ffff80003c452550) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c67b328,ffff80003c452550) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c67b328,ffff80003c452550) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c67b328,ffff80003c452550) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805c67b328,ffff80003c452550) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c452550) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c452550,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c452550,ffff800036007e20,ffff800036007d70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036007e20) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036007e20) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79d3dc219f80, 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(0xfffffd806b969d70, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff800001485000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c452550) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c452550) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800036007ab0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b581898,81,fffffd80097fb680,ffff80003c452550) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c67b328,ffff80003c452550) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c67b328,ffff80003c452550) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c67b328,ffff80003c452550) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805c67b328,ffff80003c452550) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c452550) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c452550,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c452550,ffff800036007e20,ffff800036007d70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036007e20) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036007e20) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79d3dc219f80, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000360079e0 rbx 0xffffffff8223c070 dtclose rdx 0 rcx 0xffff80003c452550 rax 0xffffffff83856860 dt_prov_static r8 0x1c8 r9 0x1 r10 0xa85614547ae91c2e r11 0xee8ef36ff236df48 r12 0xffffffff838569e0 dt_static_sched_off__cpu r13 0 r14 0 r15 0xffff8000014f4300 rip 0xffffffff8223c450 dt_ioctl_record_stop+0xf0 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff8000360079b0 ss 0x10 dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 ddb{1}> show proc PROC (syz-executor) tid=464965 pid=35812 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c452550 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c452f90,0xffff80003c453c70 process=0xffff80003c4b1888 user=0xffff800036002000, vmspace=0xfffffd806b969d70 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28993 290387 29371 0 7 0 syz-executor 48915 406140 57655 0 3 0x80 nanoslp syz-executor 48915 458403 57655 0 3 0x4000080 sysctllk syz-executor 48915 221439 57655 0 3 0x4000080 sysctllk syz-executor 97508 63411 60618 0 3 0x80 nanoslp syz-executor 97508 381612 60618 0 3 0x4000080 sysctllk syz-executor 97508 451697 60618 0 3 0x4000080 fsleep syz-executor 64330 371751 80166 0 3 0x3000 suspend syz-executor 64330 323006 80166 0 2 0x4081000 syz-executor 64330 370588 80166 0 3 0x4081000 inode syz-executor 64330 289993 80166 0 3 0x4081000 inode syz-executor 37831 416031 2631 0 3 0x3000 suspend syz-executor 37831 307760 2631 0 2 0x4081000 syz-executor 37831 322313 2631 0 3 0x4081000 fltagain2 syz-executor 87929 520795 1 0 3 0x82 nanoslp getty 7630 314033 0 0 3 0x14200 acct acct 55598 164939 0 0 3 0x14280 nfsidl nfsio 76648 431807 0 0 3 0x14280 nfsidl nfsio 73332 476506 0 0 3 0x14280 nfsidl nfsio 42239 230952 0 0 3 0x14280 nfsidl nfsio 69930 335483 0 0 3 0x14280 nfsidl nfsio 30298 24050 0 0 3 0x14280 nfsidl nfsio 15322 352489 0 0 3 0x14280 nfsidl nfsio 55491 118292 0 0 3 0x14280 nfsidl nfsio 31327 192289 0 0 3 0x14280 nfsidl nfsio 96609 523050 0 0 3 0x14280 nfsidl nfsio 36967 454988 0 0 3 0x14280 nfsidl nfsio 46297 140838 0 0 3 0x14280 nfsidl nfsio 66242 362284 0 0 3 0x14280 nfsidl nfsio 23456 287224 0 0 3 0x14280 nfsidl nfsio 88311 401256 0 0 3 0x14280 nfsidl nfsio 18238 190478 0 0 3 0x14280 nfsidl nfsio 3456 480277 0 0 3 0x14280 nfsidl nfsio 88005 125639 0 0 3 0x14280 nfsidl nfsio 81687 23233 0 0 3 0x14280 nfsidl nfsio 16735 435101 0 0 3 0x14280 nfsidl nfsio 94798 35669 0 0 3 0x14200 bored sosplice 53891 410880 96596 0 3 0x82 nanoslp syz-executor 2631 371948 96596 0 3 0x82 nanoslp syz-executor 60618 387860 96596 0 3 0x82 nanoslp syz-executor 61302 387404 96596 0 3 0x82 wait syz-executor 29371 118438 96596 0 3 0x82 nanoslp syz-executor 80166 166602 96596 0 3 0x82 nanoslp syz-executor 57655 235157 96596 0 3 0x82 nanoslp syz-executor 19831 352763 96596 0 3 0x82 nanoslp syz-executor 96596 437214 41623 0 3 0x82 kqread syz-executor 41623 486419 31601 0 3 0x10008a sigsusp ksh 31601 94452 95474 0 3 0x98 kqread sshd-session 95474 231606 38646 0 3 0x92 kqread sshd-session 38646 172959 1 0 3 0x88 kqread sshd 44445 477282 60505 74 3 0x1100092 bpf pflogd 60505 29015 1 0 3 0x80 sbwait pflogd 82963 395066 26268 73 3 0x1100090 kqread syslogd 26268 436462 1 0 3 0x100082 sbwait syslogd 10092 474028 1 0 3 0x100080 kqread resolvd 67858 329213 19366 77 3 0x100092 kqread dhcpleased 84219 24042 19366 77 3 0x100092 kqread dhcpleased 19366 302377 1 0 3 0x80 kqread dhcpleased 4851 182484 0 0 3 0x14200 bored smr 59666 241082 0 0 3 0x14200 pgzero zerothread 77526 458137 0 0 3 0x14200 aiodoned aiodoned 35628 246955 0 0 3 0x14200 syncer update 81781 320068 0 0 3 0x14200 cleaner cleaner 8195 471610 0 0 2 0x14200 reaper 38695 53365 0 0 3 0x14200 pgdaemon pagedaemon 10891 219149 0 0 3 0x14200 bored viomb 59451 205751 0 0 3 0x40014200 acpi0 acpi0 37921 282233 0 0 3 0x40014200 idle1 96082 201586 0 0 3 0x14200 bored softnet7 60399 207813 0 0 3 0x14200 bored softnet6 57203 96631 0 0 3 0x14200 bored softnet5 84614 66701 0 0 3 0x14200 bored softnet4 261 146320 0 0 3 0x14200 bored softnet3 41610 353117 0 0 3 0x14200 bored softnet2 94121 137953 0 0 3 0x14200 bored softnet1 32517 160663 0 0 3 0x14200 bored softnet0 89689 404106 0 0 3 0x14200 bored systqmp 80231 487706 0 0 3 0x14200 bored systq 5138 41528 0 0 3 0x14200 tmoslp softclockmp 95122 96525 0 0 3 0x40014200 tmoslp softclock 29781 196127 0 0 3 0x40014200 idle0 1 247255 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 64330 (syz-executor) thread 0xffff80003c4af748 (323006) Process 64330 (syz-executor) thread 0xffff8000ffff2f70 (370588) Process 37831 (syz-executor) thread 0xffff80003c44bc58 (307760) Process 37831 (syz-executor) thread 0xffff80003c4af4b8 (322313) Process 8195 (reaper) thread 0xffff8000ffffc298 (471610) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10225 11187K 11758K 166960K 12704 0 pcb 17 16K 18K 166960K 140 0 rtable 198 9K 9K 166960K 370 0 pf 37 18K 22K 166960K 119 0 ifaddr 42 7K 7K 166960K 87 0 ifgroup 55 2K 2K 166960K 137 0 sysctl 3 1K 9K 166960K 14 0 counters 74 37K 37K 166960K 176 0 ioctlops 0 0K 4K 166960K 1582 0 iov 0 0K 40K 166960K 107 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1550 97K 97K 166960K 2227 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 36 0 dirhash 12 2K 3K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 842 0 sigio 0 0K 0K 166960K 24 0 proc 72 115K 196K 166960K 622 0 subproc 72 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 99 0 in_multi 88 6K 7K 166960K 126 0 ether_multi 1 0K 0K 166960K 7 0 mrt 2 0K 0K 166960K 2 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 440 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 255 168K 181K 166960K 9415 0 UVM aobj 21 4K 4K 166960K 22 0 pinsyscall 43 86K 106K 166960K 1964 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 39 0 NDP 13 0K 1K 166960K 58 0 temp 53 8678K 8933K 166960K 36558 0 kqueue 13 20K 30K 166960K 160 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 120 139 0 136 3 0 3 3 0 8 2 rtentry 176 122 0 44 5 1 4 5 0 8 0 unpcb 144 638 0 619 3 1 2 2 0 8 1 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 736 338 0 334 14 10 4 11 0 8 3 arp 128 15 0 5 1 0 1 1 0 8 0 inpcb 328 939 0 932 12 8 4 10 0 8 3 nd6 144 19 0 2 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 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 46 0 42 2 1 1 1 0 8 0 pppxif 1504 5 0 5 2 1 1 1 0 8 1 pffrag 232 6 0 1 1 0 1 1 0 482 0 pffrnode 88 6 0 1 1 0 1 1 0 8 0 pffrent 40 8 0 3 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfstitem 24 57 0 9 1 0 1 1 0 8 0 pfstkey 128 57 0 9 2 0 2 2 0 8 0 pfstate 384 57 0 9 6 0 6 6 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 256 536 0 181 28 2 26 28 0 8 2 art_table 40 537 0 181 5 0 5 5 0 8 0 art_node 32 122 0 58 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 6 2 1 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 33 0 23 1 0 1 1 0 8 0 shmpl 112 19 0 1 1 0 1 1 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 2943 0 1443 95 0 95 95 0 8 0 ffsino 296 2943 0 1443 117 0 117 117 0 8 0 nchpl 144 4170 0 2472 64 0 64 64 0 8 0 rtmask 32 10 0 8 2 1 1 1 0 8 0 uvmvnodes 80 3603 0 0 74 0 74 74 0 8 0 vnodes 216 3603 0 0 201 0 201 201 0 8 0 namei 1024 14381 0 14380 4 3 1 2 0 8 0 percpumem 16 103 0 51 1 0 1 1 0 8 0 kstatmem 264 86 0 58 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 35794 0 35794 10 9 1 8 1 8 1 plimitpl 152 166 0 146 1 0 1 1 0 8 0 sigapl 424 1181 0 1105 9 0 9 9 0 8 0 knotepl 120 539 0 0 17 0 17 17 0 8 0 kqueuepl 224 286 0 277 4 1 3 3 0 8 2 pipepl 344 187 0 160 3 0 3 3 0 8 0 fdescpl 528 1135 0 1103 3 0 3 3 0 8 0 filepl 160 7349 0 7129 30 11 19 21 0 8 8 lockfpl 104 542 0 540 2 1 1 2 0 8 0 lockfspl 48 197 0 195 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 47 0 31 1 0 1 1 0 8 0 ucredpl 104 907 0 894 1 0 1 1 0 8 0 zombiepl 144 1284 0 1279 1 0 1 1 0 8 0 processpl 1248 1181 0 1105 6 0 6 6 0 8 0 procpl 656 2445 0 2359 8 0 8 8 0 8 0 sosppl 168 5 0 5 2 1 1 1 0 8 1 sockpl 752 1735 0 1706 25 13 12 15 0 8 8 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 19 0 0 1 0 1 1 0 8 0 mbufpl 256 236 0 0 15 0 15 15 0 8 0 bufpl 280 15640 0 9497 440 0 440 440 0 8 0 anonpl 32 14645 0 0 119 0 119 119 0 246 0 amapchunkpl 152 31360 0 30805 41 8 33 34 0 158 8 amappl16 200 5068 0 4871 62 45 17 33 0 8 6 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 124 0 112 1 0 1 1 0 8 0 amappl13 176 5 0 5 2 2 0 1 0 8 0 amappl12 168 1832 0 1800 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 22 0 22 1 1 0 1 0 8 0 amappl9 144 246 0 244 1 0 1 1 0 8 0 amappl8 136 36 0 31 1 0 1 1 0 8 0 amappl7 128 110 0 97 1 0 1 1 0 8 0 amappl6 120 249 0 245 1 0 1 1 0 8 0 amappl5 112 124 0 114 1 0 1 1 0 8 0 amappl4 104 311 0 291 1 0 1 1 0 8 0 amappl3 96 6212 0 6088 5 1 4 4 0 8 0 amappl2 88 656 0 593 2 0 2 2 0 8 0 amappl1 80 11294 0 10681 15 2 13 15 0 8 0 amappl 88 8587 0 8405 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 21 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1135 0 1103 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1135 0 1103 1 0 1 1 0 8 0 vmmpekpl 168 10751 0 10703 3 0 3 3 0 8 0 vmmpepl 168 78132 0 75900 118 11 107 116 0 357 9 vmsppl 488 1134 0 1103 5 1 4 5 0 8 0 rwobjpl 80 26908 0 22152 98 0 98 98 0 8 0 pdppl 4096 2278 0 2206 102 30 72 86 0 8 0 pvpl 32 25566 0 0 207 0 207 207 0 265 0 pmappl 256 1134 0 1103 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 296 0 49 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f0ff0) 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+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff83977ce8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83977ce8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83977ce8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83977ce8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80003c4510c0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4510c0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75f2d033cb40, count: 4 ddb{0}> trace x86_ipi_db(ffffffff837f0ff0) 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+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff83977ce8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83977ce8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83977ce8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83977ce8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80003c4510c0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4510c0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75f2d033cb40, count: -11 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 dt_ioctl_record_stop(ffff800001485000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c452550) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c452550) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800036007ab0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b581898,81,fffffd80097fb680,ffff80003c452550) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c67b328,ffff80003c452550) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c67b328,ffff80003c452550) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c67b328,ffff80003c452550) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805c67b328,ffff80003c452550) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c452550) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c452550,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c452550,ffff800036007e20,ffff800036007d70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036007e20) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036007e20) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79d3dc219f80, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff800001485000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c452550) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c452550) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800036007ab0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b581898,81,fffffd80097fb680,ffff80003c452550) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c67b328,ffff80003c452550) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c67b328,ffff80003c452550) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c67b328,ffff80003c452550) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805c67b328,ffff80003c452550) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c452550) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c452550,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c452550,ffff800036007e20,ffff800036007d70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036007e20) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036007e20) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79d3dc219f80, count: -12