uvm_fault(0xfffffd805d8f03e8, 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 358475 82258 0 0 0 0 syz-executor dt_ioctl_record_stop(ffff80000147e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c43fc58) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c43fc58) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c45db20) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806123d880,81,fffffd80097fb820,ffff80003c43fc58) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80635b3050,ffff80003c43fc58) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80635b3050,ffff80003c43fc58) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80635b3050,ffff80003c43fc58) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80635b3050,ffff80003c43fc58) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c43fc58) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c43fc58,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c43fc58,ffff80003c45de90,ffff80003c45dde0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c45de90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45de90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73804b02ef80, 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(0xfffffd805d8f03e8, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff80000147e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c43fc58) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c43fc58) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c45db20) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806123d880,81,fffffd80097fb820,ffff80003c43fc58) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80635b3050,ffff80003c43fc58) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80635b3050,ffff80003c43fc58) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80635b3050,ffff80003c43fc58) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80635b3050,ffff80003c43fc58) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c43fc58) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c43fc58,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c43fc58,ffff80003c45de90,ffff80003c45dde0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c45de90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45de90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73804b02ef80, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c45da50 rbx 0xffffffff8175f690 dtclose rdx 0 rcx 0xffff80003c43fc58 rax 0xffffffff837db458 dt_prov_syscall r8 0x7f7fffffc000 r9 0x1 r10 0xe5a76b832c50e8f4 r11 0xde6fb0579d37f426 r12 0xffff80000006ca80 r13 0 r14 0 r15 0xffff800010fcf200 rip 0xffffffff8175fa70 dt_ioctl_record_stop+0xf0 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c45da20 ss 0x10 dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 ddb{1}> show proc PROC (syz-executor) tid=406077 pid=21795 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c43fc58 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c43ef88,0xffff80003c43f4b8 process=0xffff80003c4aabc0 user=0xffff80003c458000, vmspace=0xfffffd805d8f03e8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15124 282366 62450 0 2 0 syz-executor 15124 473019 62450 0 3 0x4000080 nanoslp syz-executor 87006 78166 13425 0 2 0 syz-executor 87006 490544 13425 0 3 0x4000080 wsevent_read syz-executor 82258 358475 16061 0 7 0 syz-executor 82258 394120 16061 0 3 0x4000080 fsleep syz-executor 87315 265809 49942 -1 3 0x90 nanoslp syz-executor 87315 179616 49942 -1 3 0x4000090 sbwait syz-executor 87315 120591 49942 -1 3 0x4000090 fsleep syz-executor 69466 454974 85831 0 2 0 syz-executor 69466 475972 85831 0 3 0x4000080 kqsel syz-executor 69466 446929 85831 0 3 0x4000080 fsleep syz-executor 15044 129059 69462 0 2 0 syz-executor 15044 373825 69462 0 3 0x4000080 kqsel syz-executor 15044 275143 69462 0 3 0x4000080 fsleep syz-executor 95056 199069 0 0 3 0x14280 nfsidl nfsio 53640 294449 0 0 3 0x14280 nfsidl nfsio 9385 384595 0 0 3 0x14280 nfsidl nfsio 12497 363139 0 0 3 0x14280 nfsidl nfsio 75991 135920 0 0 3 0x14280 nfsidl nfsio 39825 456062 0 0 3 0x14280 nfsidl nfsio 54249 81901 0 0 3 0x14280 nfsidl nfsio 25497 402167 0 0 3 0x14280 nfsidl nfsio 62322 243718 0 0 3 0x14280 nfsidl nfsio 51478 283234 0 0 3 0x14280 nfsidl nfsio 98639 522601 0 0 3 0x14280 nfsidl nfsio 71593 504698 0 0 3 0x14280 nfsidl nfsio 67459 264469 0 0 3 0x14280 nfsidl nfsio 18189 389510 0 0 3 0x14280 nfsidl nfsio 61426 47390 0 0 3 0x14280 nfsidl nfsio 60965 375859 0 0 3 0x14280 nfsidl nfsio 67575 311293 0 0 3 0x14280 nfsidl nfsio 28571 52179 0 0 3 0x14280 nfsidl nfsio 69647 63337 0 0 3 0x14280 nfsidl nfsio 34952 164893 0 0 3 0x14280 nfsidl nfsio 37322 512583 0 0 3 0x14200 bored sosplice 85831 433441 73575 0 2 0x2 syz-executor 21583 523320 73575 0 3 0x82 wait syz-executor 69462 83715 73575 0 2 0x2 syz-executor 62450 250407 73575 0 3 0x82 nanoslp syz-executor 13425 135367 73575 0 3 0x82 nanoslp syz-executor 52379 515162 73575 0 3 0x82 nanoslp syz-executor 16061 204592 73575 0 3 0x82 nanoslp syz-executor 49942 110191 73575 0 3 0x82 nanoslp syz-executor 73575 97374 89292 0 3 0x82 kqread syz-executor 89292 445026 86599 0 3 0x10008a sigsusp ksh 86599 138142 17477 0 3 0x98 kqread sshd-session 17477 508718 74531 0 3 0x92 kqread sshd-session 86184 466342 1 0 3 0x100083 ttyin getty 74531 399203 1 0 3 0x88 kqread sshd 3676 495874 33378 74 3 0x1100092 bpf pflogd 33378 141486 1 0 3 0x80 sbwait pflogd 5978 369841 4513 73 3 0x1100090 kqread syslogd 4513 143666 1 0 3 0x100082 sbwait syslogd 35589 268623 1 0 3 0x100080 kqread resolvd 35770 437502 35331 77 3 0x100092 kqread dhcpleased 40176 279469 35331 77 3 0x100092 kqread dhcpleased 35331 8452 1 0 3 0x80 kqread dhcpleased 2419 373677 0 0 3 0x14200 bored smr 24064 500136 0 0 3 0x14200 pgzero zerothread 3154 131004 0 0 3 0x14200 aiodoned aiodoned 37306 159753 0 0 3 0x14200 syncer update 3696 74402 0 0 3 0x14200 cleaner cleaner 23600 117614 0 0 3 0x14200 reaper reaper 33376 248754 0 0 3 0x14200 pgdaemon pagedaemon 98795 478006 0 0 3 0x14200 bored viomb 98872 309481 0 0 3 0x40014200 acpi0 acpi0 33503 142788 0 0 3 0x40014200 idle1 98859 485162 0 0 3 0x14200 bored softnet7 34862 459988 0 0 3 0x14200 bored softnet6 62808 120415 0 0 3 0x14200 bored softnet5 62954 159071 0 0 3 0x14200 bored softnet4 7269 1656 0 0 3 0x14200 bored softnet3 85920 154283 0 0 3 0x14200 bored softnet2 77430 182438 0 0 3 0x14200 bored softnet1 88743 300289 0 0 3 0x14200 bored softnet0 95362 419100 0 0 3 0x14200 bored systqmp 96422 404531 0 0 3 0x14200 bored systq 31732 511814 0 0 3 0x14200 tmoslp softclockmp 26237 10253 0 0 3 0x40014200 tmoslp softclock 21728 488305 0 0 3 0x40014200 idle0 1 32722 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 82258 (syz-executor) thread 0xffff80003c43f9c8 (358475) exclusive rwlock amaplk r = 0 (0xfffffd806c4058a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 uvm_fault_check+0x5a9 sys/uvm/uvm_fault.c:862 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd805d8f0a88) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x36e sys/kern/kern_rwlock.c:397 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1924 #3 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 11061K 11416K 166960K 12331 0 pcb 19 13K 14K 166960K 321 0 rtable 213 7K 8K 166960K 370 0 pf 33 17K 81K 166960K 87 0 ifaddr 41 7K 8K 166960K 70 0 ifgroup 51 2K 2K 166960K 115 0 sysctl 3 1K 9K 166960K 14 0 counters 66 36K 37K 166960K 112 0 ioctlops 0 0K 4K 166960K 1651 0 iov 0 0K 20K 166960K 36 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1457 92K 92K 166960K 2077 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 32 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 768 0 sigio 0 0K 0K 166960K 12 0 proc 72 91K 128K 166960K 583 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 64 0 in_multi 92 6K 7K 166960K 115 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 4 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 432 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 251 173K 179K 166960K 8983 0 UVM aobj 32 6K 6K 166960K 38 0 pinsyscall 43 86K 102K 166960K 1868 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 40 0 NDP 11 0K 2K 166960K 44 0 temp 61 8679K 8774K 166960K 34977 0 kqueue 14 22K 33K 166960K 150 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 77 0 74 1 0 1 1 0 8 0 rtentry 176 121 0 30 5 0 5 5 0 8 0 unpcb 144 1037 0 1019 12 4 8 8 0 8 7 syncache 336 11 0 11 2 1 1 1 0 8 1 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 341 0 335 7 2 5 7 0 8 4 arp 128 13 0 1 1 0 1 1 0 8 0 inpcb 328 1034 0 1020 12 5 7 12 0 8 5 nd6 144 20 0 3 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 ppxss 1192 13 0 13 1 0 1 1 0 8 1 pppxif 1504 4 0 4 2 1 1 1 0 8 1 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 0 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 52 0 13 1 0 1 1 0 8 0 pfstkey 128 54 0 15 2 0 2 2 0 8 0 pfstate 384 53 0 14 5 0 5 5 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 548 0 120 30 0 30 30 0 8 1 art_table 40 552 0 120 5 0 5 5 0 8 0 art_node 32 120 0 41 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 26 0 16 1 0 1 1 0 8 0 shmpl 112 35 0 6 1 0 1 1 0 8 0 dirhash 1024 34 0 17 3 0 3 3 0 8 0 dino2pl 256 2834 0 1324 96 0 96 96 0 8 0 ffsino 288 2834 0 1324 109 0 109 109 0 8 0 nchpl 144 3899 0 3361 64 31 33 64 0 8 8 uvmvnodes 80 3325 0 0 68 0 68 68 0 8 0 vnodes 216 3325 0 0 185 0 185 185 0 8 0 namei 1024 13494 0 13494 2 1 1 2 0 8 1 percpumem 16 71 0 23 1 0 1 1 0 8 0 kstatmem 264 58 0 34 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 19487 0 19487 10 8 2 8 1 8 2 plimitpl 152 221 0 204 1 0 1 1 0 8 0 sigapl 424 1085 0 1010 9 0 9 9 0 8 0 knotepl 120 487 0 0 15 0 15 15 0 8 0 kqueuepl 224 269 0 257 4 2 2 3 0 8 0 pipepl 336 132 0 104 3 0 3 3 0 8 0 fdescpl 520 1042 0 1010 3 0 3 3 0 8 0 filepl 160 7174 0 6882 21 1 20 20 0 8 7 lockfpl 104 454 0 452 2 0 2 2 0 8 1 lockfspl 48 209 0 207 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 40 0 23 1 0 1 1 0 8 0 ucredpl 104 1060 0 1046 1 0 1 1 0 8 0 zombiepl 144 1012 0 1010 1 0 1 1 0 8 0 processpl 1240 1085 0 1010 6 0 6 6 0 8 0 procpl 656 2186 0 2102 8 0 8 8 0 8 0 sosppl 168 8 0 8 1 1 0 1 0 8 0 sockpl 728 2177 0 2142 37 24 13 25 0 8 8 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 53 0 0 2 0 2 2 0 8 0 mbufpl 256 1240 0 0 77 0 77 77 0 8 0 bufpl 280 8657 0 2515 439 0 439 439 0 8 0 anonpl 32 9543 0 0 77 0 77 77 0 246 0 amapchunkpl 152 30152 0 29437 39 4 35 35 0 158 7 amappl16 200 3957 0 3921 20 5 15 18 0 8 6 amappl15 192 19 0 19 3 2 1 1 0 8 1 amappl14 184 131 0 117 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1691 0 1659 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 249 0 248 2 1 1 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 115 0 103 1 0 1 1 0 8 0 amappl6 120 190 0 187 1 0 1 1 0 8 0 amappl5 112 153 0 144 1 0 1 1 0 8 0 amappl4 104 339 0 319 1 0 1 1 0 8 0 amappl3 96 5649 0 5526 5 1 4 4 0 8 0 amappl2 88 692 0 630 2 0 2 2 0 8 0 amappl1 80 12247 0 11637 17 2 15 17 0 8 0 amappl 88 8168 0 7990 5 0 5 5 0 92 0 dma16384 16384 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 128 255 0 255 2 2 0 1 0 8 0 dma64 64 7 0 7 2 2 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 37 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1042 0 1010 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1042 0 1010 1 0 1 1 0 8 0 vmmpekpl 168 10406 0 10366 3 0 3 3 0 8 0 vmmpepl 168 73383 0 71304 104 2 102 103 0 357 4 vmsppl 480 1041 0 1010 6 1 5 5 0 8 0 rwobjpl 72 25876 0 21564 81 0 81 81 0 8 0 pdppl 4096 2092 0 2020 102 30 72 86 0 8 0 pvpl 32 18339 0 0 148 0 148 148 0 265 0 pmappl 256 1041 0 1010 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 463 0 37 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837feff0) 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(ffffffff839a4d20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a4d20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd805d8f0988,b9758e55000,0,1) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c4ff180,b9758e55000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c4ff180) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x6fd18827f310, count: 7 ddb{0}> trace x86_ipi_db(ffffffff837feff0) 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(ffffffff839a4d20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a4d20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd805d8f0988,b9758e55000,0,1) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c4ff180,b9758e55000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c4ff180) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x6fd18827f310, count: -8 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 dt_ioctl_record_stop(ffff80000147e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c43fc58) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c43fc58) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c45db20) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806123d880,81,fffffd80097fb820,ffff80003c43fc58) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80635b3050,ffff80003c43fc58) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80635b3050,ffff80003c43fc58) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80635b3050,ffff80003c43fc58) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80635b3050,ffff80003c43fc58) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c43fc58) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c43fc58,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c43fc58,ffff80003c45de90,ffff80003c45dde0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c45de90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45de90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73804b02ef80, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff80000147e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c43fc58) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c43fc58) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c45db20) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806123d880,81,fffffd80097fb820,ffff80003c43fc58) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80635b3050,ffff80003c43fc58) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80635b3050,ffff80003c43fc58) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80635b3050,ffff80003c43fc58) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80635b3050,ffff80003c43fc58) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c43fc58) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c43fc58,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c43fc58,ffff80003c45de90,ffff80003c45dde0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c45de90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45de90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73804b02ef80, count: -12