uvm_fault(0xfffffd806c6113e8, 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 dt_ioctl_record_stop(ffff800001744000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff8000fffe9778) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000fffe9778) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800037fa5d80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ebb60d8,1,fffffd80097fd4e0,ffff8000fffe9778) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806897fba0,ffff8000fffe9778) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806897fba0,ffff8000fffe9778) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806897fba0,ffff8000fffe9778) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806897fba0,ffff8000fffe9778) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffe9778) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffe9778,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9778,ffff800037fa60f0,ffff800037fa6040) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037fa60f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037fa60f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77a8c3965890, 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(0xfffffd806c6113e8, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff800001744000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff8000fffe9778) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000fffe9778) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800037fa5d80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ebb60d8,1,fffffd80097fd4e0,ffff8000fffe9778) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806897fba0,ffff8000fffe9778) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806897fba0,ffff8000fffe9778) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806897fba0,ffff8000fffe9778) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806897fba0,ffff8000fffe9778) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffe9778) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffe9778,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9778,ffff800037fa60f0,ffff800037fa6040) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037fa60f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037fa60f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77a8c3965890, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800037fa5cb0 rbx 0x1 rdx 0 rcx 0xffff8000fffe9778 rax 0xffffffff83880440 dt_prov_syscall r8 0xffffffffffffffff r9 0x1 r10 0xe76447b4d3c3c4d3 r11 0x94a8d33f266c6e73 r12 0 r13 0 r14 0 r15 0xffff80000170e900 rip 0xffffffff83217b98 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff800037fa5c80 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=59658 pid=5946 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffe9778 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a24e540,0xffff80002a25a2c0 process=0xffff8000fffdc9c8 user=0xffff800037fa1000, vmspace=0xfffffd806c6113e8 estcpu=33, cpticks=3, pctcpu=0.1, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88477 275498 72748 0 2 0 syz-executor 93456 519936 91173 0 3 0x80 nanoslp syz-executor 93456 284251 91173 0 3 0x4000080 fsleep syz-executor 93456 508351 91173 0 3 0x4000080 fsleep syz-executor 66806 241110 71924 0 2 0 syz-executor 66806 174039 71924 0 3 0x4000080 fsleep syz-executor 21364 332524 1137 0 2 0 syz-executor 21364 495344 1137 0 3 0x4000080 fsleep syz-executor 13466 477802 58494 0 2 0 syz-executor 13466 350096 58494 0 3 0x4000080 fsleep syz-executor 13466 478281 58494 0 3 0x4000080 ttyin syz-executor 54880 98758 8009 0 2 0 syz-executor 54880 297745 8009 0 3 0x4000080 fsleep syz-executor 54880 212674 8009 0 3 0x4000080 fsleep syz-executor 54880 29350 8009 0 3 0x4000080 fsleep syz-executor 47940 288134 1 0 3 0x100083 ttyopn getty 42369 179983 0 0 3 0x14280 nfsidl nfsio 866 34015 0 0 3 0x14280 nfsidl nfsio 3215 312988 0 0 3 0x14280 nfsidl nfsio 37145 358649 0 0 3 0x14280 nfsidl nfsio 99798 510174 0 0 3 0x14280 nfsidl nfsio 86510 295860 0 0 3 0x14280 nfsidl nfsio 61573 9084 0 0 3 0x14280 nfsidl nfsio 31387 215437 0 0 3 0x14280 nfsidl nfsio 3961 117969 0 0 3 0x14280 nfsidl nfsio 33496 474458 0 0 3 0x14280 nfsidl nfsio 51050 36325 0 0 3 0x14280 nfsidl nfsio 60756 237898 0 0 3 0x14280 nfsidl nfsio 59732 417831 0 0 3 0x14280 nfsidl nfsio 92291 188908 0 0 3 0x14280 nfsidl nfsio 53864 232993 0 0 3 0x14280 nfsidl nfsio 91658 520048 0 0 3 0x14280 nfsidl nfsio 17769 349923 0 0 3 0x14280 nfsidl nfsio 45373 94154 0 0 3 0x14280 nfsidl nfsio 91506 384254 0 0 3 0x14280 nfsidl nfsio 37212 500407 0 0 3 0x14280 nfsidl nfsio 39766 170147 10897 0 3 0x82 nanoslp syz-executor 71924 469204 10897 0 3 0x82 nanoslp syz-executor 58494 163968 10897 0 3 0x82 nanoslp syz-executor 1137 122295 10897 0 2 0x2 syz-executor 91173 53068 10897 0 3 0x82 nanoslp syz-executor 72748 135888 10897 0 3 0x82 nanoslp syz-executor 10188 312516 10897 0 3 0x82 nanoslp syz-executor 8009 139426 10897 0 3 0x82 nanoslp syz-executor 10897 182546 8670 0 3 0x82 kqread syz-executor 8670 54867 23051 0 3 0x10008a sigsusp ksh 23051 404363 98918 0 3 0x98 kqread sshd-session 98918 332766 4951 0 3 0x92 kqread sshd-session 4951 93063 1 0 3 0x88 kqread sshd 9409 304715 96934 74 3 0x1100092 bpf pflogd 96934 147158 1 0 3 0x80 sbwait pflogd 23575 280381 64360 73 3 0x1100090 kqread syslogd 64360 110520 1 0 3 0x100082 sbwait syslogd 11493 309250 1 0 3 0x100080 kqread resolvd 9230 202755 82097 77 3 0x100092 kqread dhcpleased 69062 393191 82097 77 3 0x100092 kqread dhcpleased 82097 309740 1 0 3 0x80 kqread dhcpleased 66112 417057 0 0 3 0x14200 bored smr 77094 94702 0 0 2 0x14200 zerothread 58117 207462 0 0 3 0x14200 aiodoned aiodoned 95051 324723 0 0 3 0x14200 syncer update 57610 440263 0 0 3 0x14200 cleaner cleaner 55709 376007 0 0 3 0x14200 reaper reaper 51838 517009 0 0 3 0x14200 pgdaemon pagedaemon 11224 496654 0 0 3 0x14200 bored viomb 23864 480169 0 0 3 0x40014200 acpi0 acpi0 4592 253371 0 0 3 0x40014200 idle1 67279 50212 0 0 3 0x14200 bored softnet1 22888 327676 0 0 3 0x14200 bored softnet0 70948 161925 0 0 3 0x14200 bored systqmp 32242 315571 0 0 3 0x14200 bored systq 26909 35849 0 0 3 0x14200 tmoslp softclockmp 90829 447181 0 0 3 0x40014200 tmoslp softclock 40411 79206 0 0 3 0x40014200 idle0 1 307823 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff839cc3e0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 uvm_pmr_freepages+0x1a8 sys/uvm/uvm_pmemrange.c:-1 #3 uvm_anfree+0xe9 sys/uvm/uvm_anon.c:112 #4 amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1 #5 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 #6 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 #7 exit1+0x6fc sys/kern/kern_exit.c:260 #8 sys_exit+0x1a sys/kern/kern_exit.c:-1 #9 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11103 12141K 12348K 166960K 12989 0 pcb 17 16K 17K 166960K 415 0 rtable 146 7K 10K 166960K 542 0 pf 37 18K 81K 166960K 131 0 ifaddr 31 4K 7K 166960K 85 0 ifgroup 53 2K 2K 166960K 136 0 sysctl 3 1K 9K 166960K 17 0 counters 70 37K 38K 166960K 142 0 ioctlops 0 0K 4K 166960K 1670 0 iov 0 0K 16K 166960K 35 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1285 81K 82K 166960K 2040 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 111 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 1079 0 sigio 0 0K 0K 166960K 72 0 proc 73 115K 163K 166960K 646 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 122 0 in_multi 47 3K 7K 166960K 148 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 23 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 563 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 237 176K 196K 166960K 11652 0 UVM aobj 22 8K 8K 166960K 27 0 pinsyscall 42 84K 103K 166960K 2274 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 80 0 NDP 12 0K 1K 166960K 53 0 temp 76 9084K 9152K 166960K 47383 0 kqueue 13 20K 30K 166960K 184 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 120 119 0 113 1 0 1 1 0 8 0 rtentry 176 135 0 83 6 0 6 6 0 8 0 unpcb 144 771 0 751 7 4 3 6 0 8 2 syncache 336 7 0 7 3 2 1 1 0 8 1 tcpcb 736 372 0 367 10 3 7 7 0 8 6 arp 136 20 0 11 1 0 1 1 0 8 0 inpcb 328 1482 0 1474 14 5 9 9 0 8 8 nd6 152 28 0 16 2 0 2 2 0 8 0 pkpcb 40 2 0 2 2 2 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 24 0 24 2 1 1 1 0 8 1 pppxif 1504 8 0 8 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 12 0 7 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 0 1 0 1 1 0 8 0 pfstitem 24 75 0 26 1 0 1 1 0 8 0 pfstkey 128 77 0 28 2 0 2 2 0 8 0 pfstate 448 75 0 27 7 1 6 7 0 8 0 pfrule 1360 28 0 20 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 558 0 313 30 5 25 30 0 8 5 art_table 40 561 0 313 5 0 5 5 0 8 0 art_node 32 131 0 86 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 107 0 97 1 0 1 1 0 8 0 shmpl 112 21 0 5 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 3383 0 1925 93 0 93 93 0 8 0 ffsino 296 3383 0 1925 114 0 114 114 0 8 0 nchpl 144 4942 0 3237 64 0 64 64 0 8 0 rtmask 32 2 0 2 2 1 1 1 0 8 1 vnodes 216 3768 0 0 210 0 210 210 0 8 0 namei 1024 16546 0 16546 2 1 1 2 0 8 1 percpumem 16 86 0 36 1 0 1 1 0 8 0 vcpupl 3968 3 0 0 1 0 1 1 0 8 0 vmpool 848 3 0 0 1 0 1 1 0 8 0 kstatmem 264 78 0 50 4 1 3 3 0 8 1 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 30728 0 30728 10 8 2 8 1 8 2 plimitpl 152 376 0 356 1 0 1 1 0 8 0 sigapl 424 1407 0 1339 8 0 8 8 0 8 0 knotepl 120 558 0 0 17 0 17 17 0 8 0 kqueuepl 224 366 0 357 7 2 5 5 0 8 4 pipepl 344 209 0 182 3 0 3 3 0 8 0 fdescpl 528 1370 0 1339 3 0 3 3 0 8 0 filepl 160 8982 0 8759 22 4 18 18 0 8 8 lockfpl 104 378 0 376 1 0 1 1 0 8 0 lockfspl 48 143 0 141 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 54 0 37 1 0 1 1 0 8 0 ucredpl 104 1347 0 1333 1 0 1 1 0 8 0 zombiepl 144 1341 0 1339 1 0 1 1 0 8 0 processpl 1232 1407 0 1339 6 0 6 6 0 8 0 procpl 664 3020 0 2943 8 0 8 8 0 8 1 sosppl 176 6 0 6 2 2 0 1 0 8 0 sockpl 752 2417 0 2383 30 19 11 17 0 8 7 mcl64k 65536 3 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 25 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 282 0 0 17 0 17 17 0 8 0 bufpl 280 11754 0 5625 438 0 438 438 0 8 0 anonpl 32 11696 0 0 95 0 95 95 0 246 0 amapchunkpl 152 38648 0 38164 36 6 30 33 0 158 8 amappl16 200 5171 0 5107 30 15 15 27 0 8 4 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 449 0 448 1 0 1 1 0 8 0 amappl13 176 156 0 144 1 0 1 1 0 8 0 amappl12 168 1646 0 1617 2 0 2 2 0 8 0 amappl11 160 9 0 8 1 0 1 1 0 8 0 amappl10 152 68 0 53 1 0 1 1 0 8 0 amappl9 144 269 0 269 1 1 0 1 0 8 0 amappl8 136 131 0 128 1 0 1 1 0 8 0 amappl7 128 165 0 150 1 0 1 1 0 8 0 amappl6 120 163 0 162 1 0 1 1 0 8 0 amappl5 112 115 0 104 1 0 1 1 0 8 0 amappl4 104 320 0 299 1 0 1 1 0 8 0 amappl3 96 7771 0 7665 4 0 4 4 0 8 0 amappl2 88 598 0 538 2 0 2 2 0 8 0 amappl1 80 15523 0 14917 19 3 16 17 0 8 1 amappl 88 10686 0 10524 5 0 5 5 0 92 0 uvmvnodes 80 146 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 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 26 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1370 0 1339 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1370 0 1339 1 0 1 1 0 8 0 vmmpekpl 168 12972 0 12930 3 0 3 3 0 8 0 vmmpepl 168 96350 0 94395 108 9 99 108 0 357 5 vmsppl 488 1369 0 1338 6 1 5 5 0 8 1 rwobjpl 80 28800 0 27664 33 2 31 33 0 8 0 pdppl 4096 2753 0 2679 117 41 76 83 0 8 2 pvpl 32 18002 0 0 148 2 146 146 0 265 0 pmappl 256 1372 0 1338 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 316 0 57 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8392cff0) 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(ffffffff83997780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83997780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 exit1(ffff8000fffe1a20,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff8000fffe1a20,ffff80003c3d6980,ffff80003c3d68d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3d6980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d6980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b4d5bbbcfe0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff8392cff0) 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(ffffffff83997780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83997780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 exit1(ffff8000fffe1a20,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff8000fffe1a20,ffff80003c3d6980,ffff80003c3d68d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3d6980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d6980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b4d5bbbcfe0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff800001744000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff8000fffe9778) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000fffe9778) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800037fa5d80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ebb60d8,1,fffffd80097fd4e0,ffff8000fffe9778) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806897fba0,ffff8000fffe9778) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806897fba0,ffff8000fffe9778) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806897fba0,ffff8000fffe9778) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806897fba0,ffff8000fffe9778) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffe9778) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffe9778,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9778,ffff800037fa60f0,ffff800037fa6040) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037fa60f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037fa60f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77a8c3965890, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff800001744000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff8000fffe9778) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000fffe9778) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800037fa5d80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ebb60d8,1,fffffd80097fd4e0,ffff8000fffe9778) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806897fba0,ffff8000fffe9778) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806897fba0,ffff8000fffe9778) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806897fba0,ffff8000fffe9778) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806897fba0,ffff8000fffe9778) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffe9778) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffe9778,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9778,ffff800037fa60f0,ffff800037fa6040) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037fa60f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037fa60f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77a8c3965890, count: -12