uvm_fault(0xfffffd806c7473f0, 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 491549 98317 0 0x2 0 0 sshd-session dt_ioctl_record_stop(ffff800001660000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff8000fffee2b0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000fffee2b0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c3e14f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8063a8dcc8,1,fffffd80097fd750,ffff8000fffee2b0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80674256a8,ffff8000fffee2b0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80674256a8,ffff8000fffee2b0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80674256a8,ffff8000fffee2b0) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd80674256a8,ffff8000fffee2b0) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffee2b0) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffee2b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee2b0,ffff80003c3e1860,ffff80003c3e17b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3e1860) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e1860) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78cfe8167a50, 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(0xfffffd806c7473f0, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff800001660000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff8000fffee2b0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000fffee2b0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c3e14f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8063a8dcc8,1,fffffd80097fd750,ffff8000fffee2b0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80674256a8,ffff8000fffee2b0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80674256a8,ffff8000fffee2b0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80674256a8,ffff8000fffee2b0) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd80674256a8,ffff8000fffee2b0) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffee2b0) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffee2b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee2b0,ffff80003c3e1860,ffff80003c3e17b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3e1860) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e1860) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78cfe8167a50, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c3e1420 rbx 0x1 rdx 0 rcx 0xffff8000fffee2b0 rax 0xffffffff838977b0 dt_prov_static r8 0x1323 __ALIGN_SIZE+0x323 r9 0x1 r10 0xcbdf72d4a80d31c9 r11 0x1c1c38bdf284238a r12 0 r13 0 r14 0 r15 0xffff80000168cb00 rip 0xffffffff81878178 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c3e13f0 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=324651 pid=84835 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=84, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffee2b0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000ffffc008,0xffff8000fffef780 process=0xffff80002a39dcf8 user=0xffff80003c3dc000, vmspace=0xfffffd806c7473f0 estcpu=34, cpticks=9, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 580 315080 95421 0 2 0x100000 sh 95421 413896 6063 0 3 0x10008a sigsusp sh 98317 491549 3445 0 7 0x2 sshd-session 73607 521397 54211 0 2 0 syz-executor 73607 482932 54211 0 3 0x4000080 fsleep syz-executor 65404 165201 98531 0 2 0 syz-executor 65404 491130 98531 0 3 0x4000080 fsleep syz-executor 60438 306355 33766 0 2 0 syz-executor 60438 471857 33766 0 3 0x4000080 ttyopn syz-executor 60438 53743 33766 0 3 0x4000080 fsleep syz-executor 48414 290298 97670 0 2 0 syz-executor 48414 403441 97670 0 2 0x4000000 syz-executor 48414 499381 97670 0 3 0x4000080 fsleep syz-executor 78740 332412 1939 -1 2 0x10 syz-executor 78740 431834 1939 -1 3 0x4000090 fsleep syz-executor 78740 70354 1939 -1 3 0x4000090 fsleep syz-executor 78740 397081 1939 -1 3 0x4000090 fsleep syz-executor 6063 436445 75567 0 3 0x82 wait syz-executor 89658 342718 75567 0 3 0x82 nanoslp syz-executor 55956 256801 1 0 3 0x100083 ttyin getty 64332 307751 91556 0 3 0x100082 sbwait ndp 91556 309995 93230 0 3 0x10008a sigsusp sh 97670 267262 75567 0 3 0x82 nanoslp syz-executor 98531 400751 75567 0 3 0x82 nanoslp syz-executor 54211 324088 75567 0 3 0x82 nanoslp syz-executor 1939 277694 75567 0 3 0x82 nanoslp syz-executor 93230 251239 75567 0 3 0x82 wait syz-executor 33766 215482 75567 0 3 0x82 nanoslp syz-executor 75567 397720 29311 0 3 0x82 kqread syz-executor 29311 172059 92807 0 3 0x10008a sigsusp ksh 92807 472080 70505 0 3 0x98 kqread sshd-session 70505 364454 3445 0 3 0x92 kqread sshd-session 3445 307511 1 0 3 0x88 kqread sshd 80681 84646 80474 74 3 0x1100092 bpf pflogd 80474 162815 1 0 3 0x80 sbwait pflogd 73345 108707 66891 73 3 0x1100090 kqread syslogd 66891 103969 1 0 3 0x100082 sbwait syslogd 23109 85914 1 0 3 0x100080 kqread resolvd 8205 205739 69949 77 3 0x100092 kqread dhcpleased 27816 10891 69949 77 3 0x100092 kqread dhcpleased 69949 475479 1 0 3 0x80 kqread dhcpleased 93442 476057 0 0 3 0x14200 bored smr 41840 449743 0 0 2 0x14200 zerothread 79814 315603 0 0 3 0x14200 aiodoned aiodoned 81645 63311 0 0 3 0x14200 syncer update 24656 142106 0 0 3 0x14200 cleaner cleaner 98091 220123 0 0 3 0x14200 reaper reaper 72113 213228 0 0 3 0x14200 pgdaemon pagedaemon 6811 261001 0 0 3 0x14200 bored viomb 53526 86805 0 0 3 0x40014200 acpi0 acpi0 21496 116561 0 0 3 0x40014200 idle1 75379 294610 0 0 3 0x14200 bored softnet1 57342 77422 0 0 3 0x14200 bored softnet0 30385 425068 0 0 3 0x14200 bored systqmp 97466 266543 0 0 3 0x14200 bored systq 77323 246331 0 0 3 0x14200 tmoslp softclockmp 91295 141203 0 0 3 0x40014200 tmoslp softclock 82472 496063 0 0 3 0x40014200 idle0 1 310579 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 98317 (sshd-session) thread 0xffff80003c3d4d20 (491549) shared rwlock uobjlk r = 0 (0xfffffd8078ff6838) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806c8fdc88) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11065 12188K 12420K 166960K 13253 0 pcb 18 14K 16K 166960K 241 0 rtable 157 8K 10K 166960K 702 0 pf 39 19K 22K 166960K 176 0 ifaddr 31 5K 8K 166960K 122 0 ifgroup 50 2K 3K 166960K 188 0 sysctl 4 1K 9K 166960K 20 0 counters 66 36K 38K 166960K 180 0 ioctlops 0 0K 4K 166960K 1700 0 iov 0 0K 16K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1382 87K 87K 166960K 2270 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 0K 166960K 68 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 93K 166960K 897 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 180K 166960K 833 0 subproc 72 4K 4K 166960K 144 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 68 0 in_multi 54 3K 7K 166960K 228 0 ether_multi 2 0K 0K 166960K 13 0 mrt 0 0K 0K 166960K 17 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 574 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 261 175K 188K 166960K 9678 0 UVM aobj 25 4K 6K 166960K 26 0 pinsyscall 48 96K 108K 166960K 2251 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 80 0 NDP 10 0K 2K 166960K 79 0 temp 64 9084K 9148K 166960K 46087 0 kqueue 13 20K 31K 166960K 174 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 120 254 0 248 5 2 3 3 0 8 2 rtentry 176 217 0 159 6 0 6 6 0 8 0 unpcb 144 368 0 348 5 4 1 3 0 8 0 syncache 336 7 0 7 3 2 1 1 0 8 1 tcpcb 736 275 0 267 7 6 1 7 0 8 0 arp 136 35 0 21 1 0 1 1 0 8 0 inpcb 328 793 0 781 14 7 7 7 0 8 5 nd6 152 46 0 37 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 1 0 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1192 32 0 32 1 0 1 1 0 8 1 pppxif 1576 9 0 9 2 1 1 1 0 8 1 pfstscr 40 4 0 4 2 2 0 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 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 pfrktable 1344 14 0 12 1 0 1 1 0 8 0 pfanchor 1288 6 0 3 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 57 0 26 1 0 1 1 0 8 0 pfstkey 128 64 0 34 2 0 2 2 0 8 0 pfstate 448 60 0 30 5 1 4 5 0 8 0 pfrule 1360 31 0 25 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 877 0 643 29 10 19 29 0 8 2 art_table 40 879 0 643 5 0 5 5 0 8 0 art_node 32 215 0 164 1 0 1 1 0 8 0 sysvmsgpl 40 45 0 41 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 64 0 54 1 0 1 1 0 8 0 shmpl 112 23 0 1 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2983 0 1513 93 0 93 93 0 8 0 ffsino 296 2983 0 1513 114 0 114 114 0 8 0 nchpl 144 4086 0 2359 65 0 65 65 0 8 0 rtmask 32 7 0 7 2 1 1 1 0 8 1 vnodes 216 3585 0 0 200 0 200 200 0 8 0 namei 1024 14759 0 14759 6 4 2 3 0 8 2 percpumem 16 105 0 57 1 0 1 1 0 8 0 pfiaddrpl 120 4 0 3 1 0 1 1 0 8 0 kstatmem 264 100 0 78 3 1 2 3 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 24223 0 24223 10 7 3 8 1 8 3 plimitpl 152 331 0 313 1 0 1 1 0 8 0 sigapl 424 1200 0 1149 7 0 7 7 0 8 0 knotepl 120 326 0 0 10 0 10 10 0 8 0 kqueuepl 224 413 0 404 6 1 5 5 0 8 4 pipepl 344 248 0 221 9 6 3 9 0 8 0 fdescpl 528 1183 0 1148 3 0 3 3 0 8 0 filepl 160 7322 0 7097 23 7 16 16 0 8 5 lockfpl 104 438 0 436 2 0 2 2 0 8 1 lockfspl 48 173 0 171 1 0 1 1 0 8 0 sessionpl 144 55 0 45 1 0 1 1 0 8 0 pgrppl 48 85 0 67 1 0 1 1 0 8 0 ucredpl 104 1127 0 1112 1 0 1 1 0 8 0 zombiepl 144 1586 0 1585 2 1 1 1 0 8 0 processpl 1232 1200 0 1149 5 0 5 5 0 8 0 procpl 664 2398 0 2337 7 1 6 7 0 8 0 sosppl 176 4 0 4 2 1 1 1 0 8 1 sockpl 752 1443 0 1405 19 8 11 14 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 132 0 0 17 0 17 17 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 72 0 0 2 0 2 2 0 8 0 mbufpl 256 262 0 0 16 0 16 16 0 8 0 bufpl 280 9669 0 3539 439 0 439 439 0 8 0 anonpl 32 11375 0 0 92 0 92 92 0 246 0 amapchunkpl 152 31278 0 30773 39 6 33 37 0 158 13 amappl16 200 2309 0 2285 22 8 14 15 0 8 9 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 515 0 511 1 0 1 1 0 8 0 amappl13 176 230 0 216 1 0 1 1 0 8 0 amappl12 168 1462 0 1429 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 1 0 1 0 8 0 amappl10 152 65 0 51 1 0 1 1 0 8 0 amappl9 144 272 0 272 1 1 0 1 0 8 0 amappl8 136 130 0 127 1 0 1 1 0 8 0 amappl7 128 164 0 149 1 0 1 1 0 8 0 amappl6 120 224 0 220 1 0 1 1 0 8 0 amappl5 112 95 0 83 1 0 1 1 0 8 0 amappl4 104 361 0 341 1 0 1 1 0 8 0 amappl3 96 6273 0 6152 5 1 4 4 0 8 0 amappl2 88 613 0 543 2 0 2 2 0 8 0 amappl1 80 14002 0 13332 19 2 17 17 0 8 2 amappl 88 8696 0 8521 5 0 5 5 0 92 0 uvmvnodes 80 123 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 25 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1183 0 1148 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1183 0 1148 1 0 1 1 0 8 0 vmmpekpl 168 11707 0 11666 3 0 3 3 0 8 0 vmmpepl 168 82128 0 80050 107 8 99 103 0 357 4 vmsppl 488 1182 0 1148 5 0 5 5 0 8 0 rwobjpl 80 23611 0 22431 32 3 29 29 0 8 1 pdppl 4096 2373 0 2296 115 38 77 85 0 8 0 pvpl 32 19301 0 0 157 1 156 156 0 265 0 pmappl 256 1182 0 1148 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 310 0 64 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838a9ff0) 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(ffffffff83978140) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83978140) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83978140) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83978140) at __mp_lock+0x192 sys/kern/kern_lock.c:173 vn_closefile(fffffd806cbbdc08,ffff80003c3d4d20) at vn_closefile+0x41 sys/kern/vfs_vnops.c:608 fdrop(fffffd806cbbdc08,ffff80003c3d4d20) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806cbbdc08,ffff80003c3d4d20) at closef+0x192 sys/kern/kern_descrip.c:1265 syscall(ffff80003a3d1b50) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3d1b50) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b872513c4e0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff838a9ff0) 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(ffffffff83978140) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83978140) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83978140) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83978140) at __mp_lock+0x192 sys/kern/kern_lock.c:173 vn_closefile(fffffd806cbbdc08,ffff80003c3d4d20) at vn_closefile+0x41 sys/kern/vfs_vnops.c:608 fdrop(fffffd806cbbdc08,ffff80003c3d4d20) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806cbbdc08,ffff80003c3d4d20) at closef+0x192 sys/kern/kern_descrip.c:1265 syscall(ffff80003a3d1b50) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3d1b50) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b872513c4e0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff800001660000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff8000fffee2b0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000fffee2b0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c3e14f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8063a8dcc8,1,fffffd80097fd750,ffff8000fffee2b0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80674256a8,ffff8000fffee2b0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80674256a8,ffff8000fffee2b0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80674256a8,ffff8000fffee2b0) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd80674256a8,ffff8000fffee2b0) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffee2b0) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffee2b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee2b0,ffff80003c3e1860,ffff80003c3e17b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3e1860) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e1860) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78cfe8167a50, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff800001660000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff8000fffee2b0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000fffee2b0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c3e14f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8063a8dcc8,1,fffffd80097fd750,ffff8000fffee2b0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80674256a8,ffff8000fffee2b0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80674256a8,ffff8000fffee2b0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80674256a8,ffff8000fffee2b0) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd80674256a8,ffff8000fffee2b0) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffee2b0) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffee2b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee2b0,ffff80003c3e1860,ffff80003c3e17b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3e1860) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e1860) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78cfe8167a50, count: -12