uvm_fault(0xfffffd805bf785e0, 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 295974 5320 0 0 0 0 syz-executor dt_ioctl_record_stop(ffff8000015a5000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c4f2fc8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c4f2fc8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800033bfd070) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80655ee2d8,81,fffffd80097fb6e8,ffff80003c4f2fc8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069f274e0,ffff80003c4f2fc8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069f274e0,ffff80003c4f2fc8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069f274e0,ffff80003c4f2fc8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069f274e0,ffff80003c4f2fc8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4f2fc8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4f2fc8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4f2fc8,ffff800033bfd3e0,ffff800033bfd330) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800033bfd3e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033bfd3e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ee7dbd61250, 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(0xfffffd805bf785e0, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff8000015a5000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c4f2fc8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c4f2fc8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800033bfd070) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80655ee2d8,81,fffffd80097fb6e8,ffff80003c4f2fc8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069f274e0,ffff80003c4f2fc8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069f274e0,ffff80003c4f2fc8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069f274e0,ffff80003c4f2fc8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069f274e0,ffff80003c4f2fc8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4f2fc8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4f2fc8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4f2fc8,ffff800033bfd3e0,ffff800033bfd330) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800033bfd3e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033bfd3e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ee7dbd61250, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800033bfcfa0 rbx 0x1 rdx 0 rcx 0xffff80003c4f2fc8 rax 0xffffffff83862f10 dt_prov_syscall r8 0 r9 0 r10 0x24ae4d0fecaa69dc r11 0x4ad36bbe51ac1d12 r12 0 r13 0 r14 0 r15 0xffff800001631f00 rip 0xffffffff825ce928 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff800033bfcf70 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=187214 pid=99895 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c4f2fc8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a2b9770,0xffff80003a4202d8 process=0xffff80003a4266a0 user=0xffff800033bf8000, vmspace=0xfffffd805bf785e0 estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92705 416870 74201 0 2 0 syz-executor 5320 295974 3799 0 7 0 syz-executor 5320 363560 3799 0 2 0x4000000 syz-executor 78289 11582 8730 0 2 0 syz-executor 78289 316962 8730 0 3 0x4000080 fsleep syz-executor 78289 471571 8730 0 3 0x4000080 fsleep syz-executor 78289 310620 8730 0 2 0x4000000 syz-executor 8364 302053 42931 0 3 0x80 nanoslp syz-executor 8364 461917 42931 0 3 0x4000080 rest syz-executor 8364 502992 42931 0 3 0x4000080 sbwait syz-executor 8364 282579 42931 0 3 0x4000080 fsleep syz-executor 27848 41066 47925 0 3 0x2000 suspend syz-executor 27848 236395 47925 0 3 0x4082000 biowait syz-executor 27848 237204 47925 0 3 0x4082000 fltagain2 syz-executor 27848 467976 47925 0 4 0x4082000 syz-executor 27848 425634 47925 0 4 0x4082000 syz-executor 3799 496174 43708 0 3 0x82 nanoslp syz-executor 96568 304719 1 0 3 0x100083 ttyin getty 93051 449943 0 0 3 0x14200 acct acct 42931 73815 43708 0 3 0x82 nanoslp syz-executor 8730 2655 43708 0 3 0x82 nanoslp syz-executor 52025 193165 0 0 3 0x14200 bored sosplice 85898 276784 43708 0 3 0x82 nanoslp syz-executor 79783 81695 43708 0 3 0x82 nanoslp syz-executor 74201 389418 43708 0 3 0x82 nanoslp syz-executor 59894 520643 43708 0 3 0x82 wait syz-executor 47925 6441 43708 0 3 0x82 nanoslp syz-executor 43708 454816 26941 0 3 0x82 kqread syz-executor 26941 420647 41076 0 3 0x10008a sigsusp ksh 41076 200881 73835 0 3 0x98 kqread sshd-session 73835 495300 65708 0 3 0x92 kqread sshd-session 65708 466423 1 0 3 0x88 kqread sshd 244 237555 64154 74 3 0x1100092 bpf pflogd 64154 222839 1 0 3 0x80 sbwait pflogd 14066 482044 14885 73 3 0x1100090 kqread syslogd 14885 217846 1 0 3 0x100082 sbwait syslogd 53170 492780 1 0 3 0x100080 kqread resolvd 79974 76255 48325 77 3 0x100092 kqread dhcpleased 90673 71030 48325 77 3 0x100092 kqread dhcpleased 48325 152923 1 0 3 0x80 kqread dhcpleased 59933 113226 0 0 3 0x14200 bored smr 90440 428126 0 0 2 0x14200 zerothread 44798 414450 0 0 3 0x14200 aiodoned aiodoned 83774 121216 0 0 3 0x14200 syncer update 52506 240740 0 0 3 0x14200 cleaner cleaner 17959 384447 0 0 3 0x14200 reaper reaper 6015 10857 0 0 3 0x14200 pgdaemon pagedaemon 41097 422749 0 0 3 0x14200 bored viomb 62279 313703 0 0 3 0x40014200 acpi0 acpi0 71505 134265 0 0 3 0x40014200 idle1 92363 283170 0 0 3 0x14200 bored softnet7 58846 447295 0 0 3 0x14200 bored softnet6 46298 393586 0 0 3 0x14200 bored softnet5 17953 417286 0 0 3 0x14200 bored softnet4 14733 129752 0 0 3 0x14200 bored softnet3 35766 173480 0 0 3 0x14200 bored softnet2 1158 324262 0 0 3 0x14200 bored softnet1 91202 212397 0 0 3 0x14200 bored softnet0 39036 105510 0 0 3 0x14200 bored systqmp 43875 440464 0 0 3 0x14200 bored systq 63138 221669 0 0 3 0x14200 tmoslp softclockmp 53328 374899 0 0 3 0x40014200 tmoslp softclock 25158 50120 0 0 3 0x40014200 idle0 1 3449 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 78289 (syz-executor) thread 0xffff80003a420a90 (310620) exclusive rrwlock inode r = 0 (0xfffffd807e4b9d58) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 ptm_vn_open+0x40 sys/kern/tty_pty.c:1013 #12 ptmioctl+0x8a0 sys/kern/tty_pty.c:1178 #13 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #14 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #15 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #16 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #16 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #17 Xsyscall+0x128 Process 27848 (syz-executor) thread 0xffff80003a420d28 (236395) exclusive rrwlock inode r = 0 (0xfffffd806e243540) #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:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10231 11072K 12376K 166960K 12072 0 pcb 17 13K 14K 166960K 141 0 rtable 179 11K 12K 166960K 518 0 pf 38 18K 82K 166960K 151 0 ifaddr 37 6K 8K 166960K 105 0 ifgroup 59 2K 2K 166960K 160 0 sysctl 4 1K 9K 166960K 12 0 counters 70 37K 38K 166960K 198 0 ioctlops 0 0K 4K 166960K 1702 0 iov 0 0K 32K 166960K 64 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1454 91K 92K 166960K 2179 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 34 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 833 0 sigio 0 0K 0K 166960K 80 0 proc 72 115K 164K 166960K 678 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 77 0 in_multi 68 4K 7K 166960K 160 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 501 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 253 160K 169K 166960K 9420 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 43 86K 104K 166960K 2048 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 58 0 NDP 13 0K 1K 166960K 74 0 temp 63 8648K 8774K 166960K 26298 0 kqueue 13 20K 29K 166960K 168 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 88 0 85 1 0 1 1 0 8 0 rtentry 176 146 0 82 5 0 5 5 0 8 0 unpcb 144 584 0 564 7 3 4 4 0 8 3 syncache 336 6 0 6 1 1 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 168 0 161 3 1 2 2 0 8 1 arp 128 18 0 9 1 0 1 1 0 8 0 inpcb 328 874 0 864 10 7 3 7 0 8 0 nd6 144 28 0 14 1 0 1 1 0 8 0 pkpcb 40 5 0 5 4 3 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 54 0 54 2 1 1 1 0 8 1 pppxif 1504 4 0 4 2 1 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 10 0 3 1 0 1 1 0 482 0 pffrnode 88 4 0 0 1 0 1 1 0 8 0 pffrent 40 14 0 6 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 1 0 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 77 0 17 1 0 1 1 0 8 0 pfstkey 128 79 0 20 2 0 2 2 0 8 0 pfstate 384 76 0 18 6 0 6 6 0 8 0 pfrule 1344 30 0 24 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 651 0 322 28 4 24 28 0 8 1 art_table 40 653 0 322 5 0 5 5 0 8 0 art_node 32 145 0 92 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 1 0 1 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 24 0 7 3 0 3 3 0 8 0 dino2pl 256 3077 0 1565 95 0 95 95 0 8 0 ffsino 296 3078 0 1565 117 0 117 117 0 8 0 nchpl 144 4221 0 2524 64 0 64 64 0 8 0 rtmask 32 14 0 14 1 1 0 1 0 8 0 uvmvnodes 80 3499 0 0 72 0 72 72 0 8 0 vnodes 216 3499 0 0 195 0 195 195 0 8 0 namei 1024 14718 0 14716 2 1 1 2 0 8 0 percpumem 16 114 0 64 1 0 1 1 0 8 0 kstatmem 264 110 0 78 3 0 3 3 0 8 0 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 17428 0 17427 10 9 1 8 1 8 0 plimitpl 152 286 0 266 1 0 1 1 0 8 0 sigapl 424 1168 0 1112 9 1 8 9 0 8 0 knotepl 120 541 0 0 17 0 17 17 0 8 0 kqueuepl 224 358 0 349 5 4 1 5 0 8 0 pipepl 344 283 0 254 6 3 3 6 0 8 0 fdescpl 528 1123 0 1091 3 0 3 3 0 8 0 filepl 160 7685 0 7417 19 5 14 15 0 8 2 lockfpl 104 328 0 326 2 1 1 2 0 8 0 lockfspl 48 90 0 88 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 55 0 38 1 0 1 1 0 8 0 ucredpl 104 1452 0 1437 1 0 1 1 0 8 0 zombiepl 144 1162 0 1159 1 0 1 1 0 8 0 processpl 1232 1168 0 1112 6 0 6 6 0 8 0 procpl 664 2340 0 2273 10 2 8 8 0 8 2 sockpl 752 1567 0 1534 22 12 10 14 0 8 5 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 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 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 50 0 0 7 0 7 7 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1168 0 0 73 0 73 73 0 8 0 bufpl 280 6638 0 495 440 0 440 440 0 8 0 anonpl 32 12759 0 0 103 0 103 103 0 246 0 amapchunkpl 152 29852 0 29326 39 11 28 28 0 158 4 amappl16 200 3913 0 3851 41 36 5 25 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 135 0 123 1 0 1 1 0 8 0 amappl13 176 29 0 29 1 1 0 1 0 8 0 amappl12 168 1885 0 1853 4 1 3 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 39 0 39 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 137 0 125 1 0 1 1 0 8 0 amappl6 120 220 0 216 1 0 1 1 0 8 0 amappl5 112 182 0 173 1 0 1 1 0 8 0 amappl4 104 320 0 301 1 0 1 1 0 8 0 amappl3 96 5875 0 5754 5 1 4 4 0 8 0 amappl2 88 729 0 667 2 0 2 2 0 8 0 amappl1 80 12110 0 11511 15 0 15 15 0 8 0 amappl 88 8541 0 8361 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 8 0 8 3 3 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1123 0 1091 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1123 0 1091 1 0 1 1 0 8 0 vmmpekpl 168 10805 0 10756 3 0 3 3 0 8 0 vmmpepl 168 77091 0 74995 115 16 99 109 0 357 0 vmsppl 488 1122 0 1091 6 1 5 5 0 8 0 rwobjpl 80 26219 0 21737 93 0 93 93 0 8 0 pdppl 4096 2254 0 2182 120 48 72 84 0 8 0 pvpl 32 21617 0 0 174 0 174 174 0 265 0 pmappl 256 1122 0 1091 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 362 0 58 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83791ff0) 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(ffffffff838aa878) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838aa878) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c4430e0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x71ee24b765a0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83791ff0) 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(ffffffff838aa878) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838aa878) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c4430e0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x71ee24b765a0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff8000015a5000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c4f2fc8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c4f2fc8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800033bfd070) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80655ee2d8,81,fffffd80097fb6e8,ffff80003c4f2fc8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069f274e0,ffff80003c4f2fc8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069f274e0,ffff80003c4f2fc8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069f274e0,ffff80003c4f2fc8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069f274e0,ffff80003c4f2fc8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4f2fc8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4f2fc8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4f2fc8,ffff800033bfd3e0,ffff800033bfd330) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800033bfd3e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033bfd3e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ee7dbd61250, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff8000015a5000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c4f2fc8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c4f2fc8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800033bfd070) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80655ee2d8,81,fffffd80097fb6e8,ffff80003c4f2fc8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069f274e0,ffff80003c4f2fc8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069f274e0,ffff80003c4f2fc8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069f274e0,ffff80003c4f2fc8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069f274e0,ffff80003c4f2fc8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4f2fc8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4f2fc8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4f2fc8,ffff800033bfd3e0,ffff800033bfd330) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800033bfd3e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033bfd3e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ee7dbd61250, count: -12