uvm_fault(0xfffffd8068bfe7c0, 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 355099 70353 0 0 0x4000000 0 syz-executor dt_ioctl_record_stop(ffff800001476000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,81,2000,ffff80003c496a98) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c496a98) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c479910) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c2b1518,81,fffffd80097fb478,ffff80003c496a98) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c71aa88,ffff80003c496a98) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c71aa88,ffff80003c496a98) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c71aa88,ffff80003c496a98) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805c71aa88,ffff80003c496a98) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c496a98) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c496a98,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c496a98,ffff80003c479c80,ffff80003c479bd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c479c80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c479c80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d23ebcd8a0, 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(0xfffffd8068bfe7c0, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff800001476000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,81,2000,ffff80003c496a98) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c496a98) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c479910) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c2b1518,81,fffffd80097fb478,ffff80003c496a98) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c71aa88,ffff80003c496a98) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c71aa88,ffff80003c496a98) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c71aa88,ffff80003c496a98) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805c71aa88,ffff80003c496a98) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c496a98) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c496a98,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c496a98,ffff80003c479c80,ffff80003c479bd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c479c80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c479c80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d23ebcd8a0, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c479840 rbx 0x1 rdx 0 rcx 0xffff80003c496a98 rax 0xffffffff837b9b28 dt_prov_syscall r8 0 r9 0 r10 0x343f9519e7583801 r11 0x58d4978e58e3e781 r12 0 r13 0 r14 0 r15 0xffff8000014c9b00 rip 0xffffffff81acc2e8 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c479810 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=116504 pid=79676 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c496a98 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c496038,0xffff80003c497a38 process=0xffff8000310139e0 user=0xffff80003c474000, vmspace=0xfffffd8068bfe7c0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 70353 103485 17410 0 2 0 syz-executor 70353 355099 17410 0 7 0x4000000 syz-executor 96184 382530 72148 0 2 0 syz-executor 96184 181260 72148 0 2 0x4000000 syz-executor 93924 266380 62461 0 3 0x3000 suspend syz-executor 93924 156688 62461 0 2 0x4081000 syz-executor 66893 75860 17223 0 2 0 syz-executor 66893 496059 17223 0 3 0x4000080 kqread syz-executor 66893 472117 17223 0 3 0x4000080 fsleep syz-executor 72732 323358 77038 60928 3 0x90 nanoslp syz-executor 72732 338352 77038 60928 3 0x4000090 fifow syz-executor 72732 171638 77038 60928 3 0x4000090 fifow syz-executor 72732 194813 77038 60928 3 0x4000090 fsleep syz-executor 13801 350679 1 0 3 0x100083 ttyin getty 49984 166336 0 0 3 0x14280 nfsidl nfsio 94100 445698 0 0 3 0x14280 nfsidl nfsio 68103 162086 0 0 3 0x14280 nfsidl nfsio 68122 156989 0 0 3 0x14280 nfsidl nfsio 80223 385605 0 0 3 0x14280 nfsidl nfsio 36363 134367 0 0 3 0x14280 nfsidl nfsio 49516 318510 0 0 3 0x14280 nfsidl nfsio 36928 335711 0 0 3 0x14280 nfsidl nfsio 44176 321108 0 0 3 0x14280 nfsidl nfsio 62353 318519 0 0 3 0x14280 nfsidl nfsio 25029 373454 0 0 3 0x14280 nfsidl nfsio 28916 507831 0 0 3 0x14280 nfsidl nfsio 4760 482114 0 0 3 0x14280 nfsidl nfsio 3170 286716 0 0 3 0x14280 nfsidl nfsio 33674 13075 0 0 3 0x14280 nfsidl nfsio 99337 104275 0 0 3 0x14280 nfsidl nfsio 85980 466378 0 0 3 0x14280 nfsidl nfsio 57370 370025 0 0 3 0x14280 nfsidl nfsio 51937 25740 0 0 3 0x14280 nfsidl nfsio 1939 324504 0 0 3 0x14280 nfsidl nfsio 6034 304660 0 0 3 0x14200 bored sosplice 49204 492123 53880 0 3 0x82 nanoslp syz-executor 17410 188879 53880 0 3 0x82 nanoslp syz-executor 81342 107482 53880 0 2 0x2 syz-executor 77038 165059 53880 0 2 0x2 syz-executor 62461 361468 53880 0 3 0x82 nanoslp syz-executor 59526 434245 53880 0 3 0x82 wait syz-executor 17223 309299 53880 0 3 0x82 nanoslp syz-executor 72148 236276 53880 0 3 0x82 nanoslp syz-executor 53880 12925 82744 0 3 0x82 kqread syz-executor 82744 403499 57317 0 3 0x10008a sigsusp ksh 57317 364580 91523 0 3 0x98 kqread sshd-session 91523 221382 54028 0 3 0x92 kqread sshd-session 54028 474278 1 0 3 0x88 kqread sshd 54140 145638 35323 74 3 0x1100092 bpf pflogd 35323 21698 1 0 3 0x80 sbwait pflogd 92532 94298 6520 73 3 0x1100090 kqread syslogd 6520 339825 1 0 3 0x100082 sbwait syslogd 81781 412140 1 0 3 0x100080 kqread resolvd 29669 274327 48260 77 3 0x100092 kqread dhcpleased 62006 129958 48260 77 3 0x100092 kqread dhcpleased 48260 117820 1 0 3 0x80 kqread dhcpleased 25624 492583 0 0 3 0x14200 bored smr 28029 194501 0 0 2 0x14200 zerothread 26830 40136 0 0 3 0x14200 aiodoned aiodoned 13352 279851 0 0 3 0x14200 syncer update 83936 432340 0 0 3 0x14200 cleaner cleaner 43564 442210 0 0 3 0x14200 reaper reaper 83142 504019 0 0 3 0x14200 pgdaemon pagedaemon 55010 138159 0 0 3 0x14200 bored viomb 4716 28187 0 0 3 0x40014200 acpi0 acpi0 44486 55996 0 0 3 0x40014200 idle1 87325 65841 0 0 3 0x14200 bored softnet7 4801 57477 0 0 3 0x14200 bored softnet6 94594 478348 0 0 3 0x14200 bored softnet5 95788 75563 0 0 3 0x14200 bored softnet4 84582 249923 0 0 3 0x14200 bored softnet3 94482 258654 0 0 3 0x14200 bored softnet2 56170 513128 0 0 3 0x14200 bored softnet1 83713 34926 0 0 3 0x14200 bored softnet0 99400 29206 0 0 3 0x14200 bored systqmp 35121 290798 0 0 3 0x14200 bored systq 9605 157176 0 0 3 0x14200 tmoslp softclockmp 87425 348409 0 0 3 0x40014200 tmoslp softclock 84408 286775 0 0 3 0x40014200 idle0 1 8843 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 70353 (syz-executor) thread 0xffff80003c44fcb0 (355099) exclusive rwlock vmmaplk r = 0 (0xfffffd8068bfec90) #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:5168 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1918 #4 uvm_fault_check+0x895 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x895 sys/uvm/uvm_fault.c:784 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #8 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10225 11085K 11282K 166960K 11727 0 pcb 18 18K 34K 166960K 414 0 rtable 213 10K 10K 166960K 454 0 pf 37 18K 22K 166960K 110 0 ifaddr 42 7K 8K 166960K 74 0 ifgroup 57 2K 2K 166960K 118 0 sysctl 4 1K 9K 166960K 78 0 counters 72 37K 38K 166960K 208 0 ioctlops 0 0K 4K 166960K 1592 0 iov 0 0K 16K 166960K 33 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1412 89K 89K 166960K 1783 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 56 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 637 0 sigio 0 0K 0K 166960K 13 0 proc 72 115K 164K 166960K 601 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 62 0 in_multi 95 7K 7K 166960K 126 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 7 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 467 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 185K 166960K 7516 0 UVM aobj 12 2K 2K 166960K 14 0 pinsyscall 43 86K 100K 166960K 1751 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 53 0 NDP 13 0K 2K 166960K 52 0 temp 57 8647K 8714K 166960K 37397 0 kqueue 14 20K 30K 166960K 114 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 120 110 0 106 2 1 1 2 0 8 0 rtentry 176 112 0 26 5 0 5 5 0 8 0 unpcb 144 513 0 494 7 3 4 6 0 8 3 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 273 0 267 7 4 3 7 0 8 2 arp 128 13 0 2 1 0 1 1 0 8 0 inpcb 328 1080 0 1068 10 3 7 10 0 8 5 nd6 144 20 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 65 0 63 2 1 1 1 0 8 0 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pffrag 232 36 0 32 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 69 0 65 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 1 0 0 1 0 1 1 0 8 0 pfstitem 24 50 0 12 1 0 1 1 0 8 0 pfstkey 128 50 0 12 2 0 2 2 0 8 0 pfstate 384 49 0 12 5 0 5 5 0 8 0 pfrule 1344 24 0 18 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 527 0 109 32 3 29 32 0 8 0 art_table 40 530 0 109 6 0 6 6 0 8 0 art_node 32 111 0 36 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 2 1 0 1 1 0 8 0 semapl 112 52 0 42 1 0 1 1 0 8 0 shmpl 112 11 0 2 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2556 0 1042 96 0 96 96 0 8 1 ffsino 296 2556 0 1042 118 0 118 118 0 8 0 nchpl 144 3452 0 1752 64 0 64 64 0 8 0 rtmask 32 8 0 8 1 1 0 1 0 8 0 uvmvnodes 80 2842 0 0 58 0 58 58 0 8 0 vnodes 216 2842 0 0 158 0 158 158 0 8 0 namei 1024 11675 0 11675 2 1 1 2 0 8 1 percpumem 16 119 0 68 1 0 1 1 0 8 0 kstatmem 264 72 0 44 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scxspl 216 19447 0 19447 10 4 6 8 1 8 6 plimitpl 152 165 0 146 1 0 1 1 0 8 0 sigapl 424 960 0 885 9 0 9 9 0 8 0 knotepl 120 567 0 0 17 0 17 17 0 8 0 kqueuepl 224 179 0 169 2 0 2 2 0 8 1 pipepl 344 149 0 121 3 0 3 3 0 8 0 fdescpl 528 917 0 885 3 0 3 3 0 8 0 filepl 160 6071 0 5838 18 2 16 16 0 8 4 lockfpl 104 296 0 294 2 1 1 2 0 8 0 lockfspl 48 74 0 72 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 39 0 22 1 0 1 1 0 8 0 ucredpl 104 738 0 721 1 0 1 1 0 8 0 zombiepl 144 889 0 885 1 0 1 1 0 8 0 processpl 1232 960 0 885 6 0 6 6 0 8 0 procpl 664 1843 0 1760 8 0 8 8 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 752 1781 0 1745 24 13 11 17 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 213 0 0 13 0 13 13 0 8 0 bufpl 280 8111 0 1968 439 0 439 439 0 8 0 anonpl 32 11686 0 0 95 0 95 95 0 246 0 amapchunkpl 152 25114 0 24579 43 6 37 37 0 158 13 amappl16 200 3821 0 3788 27 12 15 16 0 8 9 amappl15 192 64 0 64 1 1 0 1 0 8 0 amappl14 184 126 0 114 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 1573 0 1541 3 1 2 2 0 8 0 amappl11 160 51 0 36 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 260 0 260 1 1 0 1 0 8 0 amappl8 136 44 0 41 1 0 1 1 0 8 0 amappl7 128 111 0 99 1 0 1 1 0 8 0 amappl6 120 209 0 206 1 0 1 1 0 8 0 amappl5 112 126 0 116 1 0 1 1 0 8 0 amappl4 104 317 0 296 1 0 1 1 0 8 0 amappl3 96 4144 0 4039 3 0 3 3 0 8 0 amappl2 88 1192 0 1112 2 0 2 2 0 8 0 amappl1 80 10950 0 10340 15 0 15 15 0 8 0 amappl 88 6708 0 6528 5 0 5 5 0 92 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 7 0 7 2 1 1 1 0 8 1 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 13 0 2 1 0 1 1 0 8 0 uaddrrnd 24 917 0 885 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 917 0 885 1 0 1 1 0 8 0 vmmpekpl 168 9345 0 9304 3 0 3 3 0 8 0 vmmpepl 168 64978 0 62922 104 2 102 102 0 357 1 vmsppl 488 916 0 885 5 1 4 5 0 8 0 rwobjpl 80 23055 0 19250 82 0 82 82 0 8 0 pdppl 4096 1842 0 1770 102 30 72 84 0 8 0 pvpl 32 21889 0 0 177 0 177 177 0 265 0 pmappl 256 916 0 885 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 290 0 42 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83837ff0) 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(ffffffff838727a8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838727a8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 vn_ioctl(fffffd806b8acd58,80044b02,ffff80003c473560,ffff80003c44fcb0) at vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 sys_ioctl(ffff80003c44fcb0,ffff80003c473740,ffff80003c473690) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c473740) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c473740) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xad4fd1e50a0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff83837ff0) 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(ffffffff838727a8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838727a8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 vn_ioctl(fffffd806b8acd58,80044b02,ffff80003c473560,ffff80003c44fcb0) at vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 sys_ioctl(ffff80003c44fcb0,ffff80003c473740,ffff80003c473690) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c473740) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c473740) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xad4fd1e50a0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff800001476000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,81,2000,ffff80003c496a98) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c496a98) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c479910) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c2b1518,81,fffffd80097fb478,ffff80003c496a98) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c71aa88,ffff80003c496a98) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c71aa88,ffff80003c496a98) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c71aa88,ffff80003c496a98) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805c71aa88,ffff80003c496a98) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c496a98) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c496a98,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c496a98,ffff80003c479c80,ffff80003c479bd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c479c80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c479c80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d23ebcd8a0, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff800001476000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,81,2000,ffff80003c496a98) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c496a98) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c479910) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c2b1518,81,fffffd80097fb478,ffff80003c496a98) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c71aa88,ffff80003c496a98) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c71aa88,ffff80003c496a98) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c71aa88,ffff80003c496a98) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805c71aa88,ffff80003c496a98) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c496a98) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c496a98,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c496a98,ffff80003c479c80,ffff80003c479bd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c479c80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c479c80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d23ebcd8a0, count: -12