uvm_fault(0xfffffd8063c02210, 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 488564 33643 0 0 0 0 syz-executor dt_ioctl_record_stop(ffff8000016ce000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffee7e0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffee7e0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2a48f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d9ddbf0,81,fffffd80097fd548,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c8cad60,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c8cad60,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c8cad60,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806c8cad60,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee7e0,ffff80002a2a4c60,ffff80002a2a4bb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2a4c60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2a4c60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x742a520f8e00, 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(0xfffffd8063c02210, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff8000016ce000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffee7e0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffee7e0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2a48f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d9ddbf0,81,fffffd80097fd548,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c8cad60,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c8cad60,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c8cad60,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806c8cad60,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee7e0,ffff80002a2a4c60,ffff80002a2a4bb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2a4c60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2a4c60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x742a520f8e00, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2a4820 rbx 0x1 rdx 0 rcx 0xffff8000fffee7e0 rax 0xffffffff83900020 dt_prov_static r8 0 r9 0x1 r10 0x9ae826456988564e r11 0x78a9b68e3d9187a1 r12 0 r13 0 r14 0 r15 0xffff80000167e200 rip 0xffffffff83217b98 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80002a2a47f0 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=342221 pid=59193 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffee7e0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c3c8550,0xffff8000fffeed20 process=0xffff80002a38eb68 user=0xffff80002a29f000, vmspace=0xfffffd8063c02210 estcpu=36, cpticks=17, pctcpu=0.9, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 33643 488564 29198 0 7 0 syz-executor 33643 337750 29198 0 3 0x4000080 ttyin syz-executor 38255 131502 44955 0 2 0 syz-executor 38255 47384 44955 0 3 0x4000080 fsleep syz-executor 47536 48654 83829 0 2 0 syz-executor 47536 273646 83829 0 3 0x4000080 netcon syz-executor 47536 406400 83829 0 3 0x4000080 fsleep syz-executor 19035 371521 37057 0 3 0x80 nanoslp syz-executor 19035 281792 37057 0 3 0x4000080 ttyin syz-executor 19035 55362 37057 0 3 0x4000080 fsleep syz-executor 83829 161434 37006 0 3 0x82 nanoslp syz-executor 35273 501301 37006 0 2 0x3 syz-executor 73393 58517 1 0 3 0x100083 ttyopn getty 29198 163922 37006 0 3 0x82 nanoslp syz-executor 40271 211879 37006 0 2 0x2 syz-executor 15863 286605 37006 0 2 0x2 syz-executor 94691 68535 37006 0 2 0x2 syz-executor 37057 324170 37006 0 2 0x3 syz-executor 44955 81299 37006 0 3 0x82 nanoslp syz-executor 37006 26058 51660 0 3 0x82 kqread syz-executor 51660 267650 29865 0 3 0x10008a sigsusp ksh 29865 334282 39856 0 3 0x98 kqread sshd-session 39856 203029 72277 0 3 0x92 kqread sshd-session 72277 53654 1 0 3 0x88 kqread sshd 86996 98462 42988 74 3 0x1100092 bpf pflogd 42988 139313 1 0 3 0x80 sbwait pflogd 96448 86300 65231 73 3 0x1100090 kqread syslogd 65231 507183 1 0 3 0x100082 sbwait syslogd 62242 313635 1 0 3 0x100080 kqread resolvd 12374 439587 5481 77 3 0x100092 kqread dhcpleased 52809 394656 5481 77 3 0x100092 kqread dhcpleased 5481 396998 1 0 3 0x80 kqread dhcpleased 62524 200249 0 0 2 0x40014200 smr 39104 278484 0 0 2 0x14200 zerothread 75654 286018 0 0 3 0x14200 aiodoned aiodoned 78348 20614 0 0 3 0x14200 syncer update 6640 257984 0 0 3 0x14200 cleaner cleaner 37459 496664 0 0 2 0x14200 reaper 35474 499931 0 0 3 0x14200 pgdaemon pagedaemon 80615 354548 0 0 3 0x14200 bored viomb 91126 172146 0 0 3 0x40014200 acpi0 acpi0 77001 19825 0 0 3 0x40014200 idle1 17822 468229 0 0 3 0x14200 bored softnet1 73787 280664 0 0 3 0x14200 bored softnet0 73241 187533 0 0 3 0x14200 smrbar systqmp 51027 456021 0 0 3 0x14200 bored systq 5594 316328 0 0 3 0x14200 tmoslp softclockmp 81244 206224 0 0 3 0x40014200 tmoslp softclock 71093 419582 0 0 3 0x40014200 idle0 1 314173 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 40271 (syz-executor) thread 0xffff8000fffef240 (211879) exclusive rwlock vmmaplk r = 0 (0xfffffd8063c02128) #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:5171 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3752 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd806f5b96c0) #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:5171 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3743 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 94691 (syz-executor) thread 0xffff8000ffffd760 (68535) exclusive rwlock vmmaplk r = 0 (0xfffffd8063c028c8) #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:5171 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3752 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd800b0636b8) #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:5171 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3743 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 37459 (reaper) thread 0xffff8000ffffd9f8 (496664) exclusive rwlock kmmaplk r = 0 (0xffffffff839cc128) #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:5171 #3 uvm_unmap+0x7d sys/uvm/uvm_map.c:1798 #4 km_free+0x87 sys/uvm/uvm_km.c:714 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1ca sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 Process 73241 (systqmp) thread 0xffff8000ffffe7c8 (187533) shared rwlock systqmp r = 0 (0xffffffff83867858) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11092 12122K 16386K 166960K 14294 0 pcb 17 17K 19K 166960K 439 0 rtable 262 14K 15K 166960K 729 0 pf 33 17K 22K 166960K 238 0 ifaddr 43 8K 9K 166960K 154 0 ifgroup 48 2K 2K 166960K 260 0 sysctl 3 1K 9K 166960K 19 0 counters 68 36K 38K 166960K 324 0 ioctlops 0 0K 4K 166960K 1907 0 iov 1 12K 28K 166960K 113 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1368 86K 86K 166960K 2927 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 118 0 dirhash 12 2K 2K 166960K 69 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1885 0 sigio 0 0K 0K 166960K 43 0 proc 73 115K 164K 166960K 862 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 475 0 in_multi 90 6K 7K 166960K 224 0 ether_multi 1 0K 0K 166960K 30 0 mrt 2 0K 0K 166960K 44 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 846 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 229 160K 180K 166960K 19314 0 UVM aobj 62 21K 21K 166960K 68 0 pinsyscall 42 84K 104K 166960K 3147 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 132 0 NDP 11 0K 2K 166960K 111 0 temp 80 9084K 9157K 166960K 81731 0 kqueue 13 20K 30K 166960K 342 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 120 243 0 240 3 2 1 3 0 8 0 rtentry 176 204 0 105 6 0 6 6 0 8 0 unpcb 144 1324 0 1306 10 9 1 6 0 8 0 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 736 778 0 773 11 10 1 7 0 8 0 arp 136 34 0 16 1 0 1 1 0 8 0 inpcb 328 2265 0 2256 28 23 5 15 0 8 4 nd6 152 41 0 17 2 0 2 2 0 8 0 pkpcb 40 11 0 11 4 3 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1192 106 0 106 2 1 1 1 0 8 1 pppxif 1504 9 0 9 3 2 1 1 0 8 1 pffrag 232 18 0 9 1 0 1 1 0 482 0 pffrnode 88 16 0 9 1 0 1 1 0 8 0 pffrent 40 28 0 19 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 6 0 6 1 1 0 1 0 8 0 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 119 0 59 1 0 1 1 0 8 0 pfstkey 128 123 0 63 3 0 3 3 0 8 0 pfstate 448 121 0 61 8 0 8 8 0 8 0 pfrule 1360 24 0 18 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 1 1 1 0 8 1 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 901 0 467 34 4 30 30 0 8 0 art_table 40 906 0 467 5 0 5 5 0 8 0 art_node 32 201 0 113 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 11 1 0 1 1 0 8 0 semupl 112 4 0 4 4 3 1 1 0 8 1 semapl 112 109 0 99 1 0 1 1 0 8 0 shmpl 112 58 0 6 2 0 2 2 0 8 0 dirhash 1024 55 0 38 3 0 3 3 0 8 0 dino2pl 256 5218 0 3750 93 0 93 93 0 8 0 ffsino 296 5218 0 3750 114 0 114 114 0 8 0 nchpl 144 7733 0 6024 64 0 64 64 0 8 0 rtmask 32 27 0 27 4 3 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 27083 0 27083 5 4 1 2 0 8 1 percpumem 16 177 0 128 1 0 1 1 0 8 0 vcpupl 3968 7 0 0 1 0 1 1 0 8 0 vmpool 848 7 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 kstatmem 264 174 0 150 6 3 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 6 0 6 3 3 0 1 0 8 0 scxspl 216 43984 0 43984 13 12 1 8 1 8 1 plimitpl 152 498 0 480 1 0 1 1 0 8 0 sigapl 424 2195 0 2148 8 0 8 8 0 8 0 knotepl 120 815 0 0 24 0 24 24 0 8 0 kqueuepl 224 918 0 907 19 14 5 5 0 8 4 pipepl 344 284 0 257 3 0 3 3 0 8 0 fdescpl 528 2155 0 2124 3 0 3 3 0 8 0 filepl 160 14420 0 14201 33 20 13 20 0 8 2 lockfpl 104 911 0 909 1 0 1 1 0 8 0 lockfspl 48 329 0 327 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 78 0 61 1 0 1 1 0 8 0 ucredpl 104 2576 0 2563 1 0 1 1 0 8 0 zombiepl 144 2981 0 2980 1 0 1 1 0 8 0 processpl 1232 2195 0 2148 6 1 5 6 0 8 0 procpl 664 5260 0 5206 8 2 6 8 0 8 0 sosppl 176 21 0 21 3 3 0 1 0 8 0 sockpl 752 3898 0 3868 41 34 7 21 0 8 4 mcl64k 65536 6 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 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 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 12 0 0 1 0 1 1 0 8 0 mbufpl 256 545 0 0 34 0 34 34 0 8 0 bufpl 280 16859 0 10730 439 0 439 439 0 8 0 anonpl 32 12923 0 0 105 0 105 105 0 246 0 amapchunkpl 152 66066 0 65612 70 35 35 41 0 158 11 amappl16 200 7218 0 7186 67 56 11 30 0 8 1 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 488 0 487 1 0 1 1 0 8 0 amappl13 176 149 0 137 1 0 1 1 0 8 0 amappl12 168 2525 0 2497 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 68 0 54 1 0 1 1 0 8 0 amappl9 144 284 0 283 2 1 1 1 0 8 0 amappl8 136 156 0 154 1 0 1 1 0 8 0 amappl7 128 171 0 158 1 0 1 1 0 8 0 amappl6 120 256 0 254 1 0 1 1 0 8 0 amappl5 112 101 0 89 1 0 1 1 0 8 0 amappl4 104 314 0 294 1 0 1 1 0 8 0 amappl3 96 13365 0 13258 4 0 4 4 0 8 0 amappl2 88 588 0 527 2 0 2 2 0 8 0 amappl1 80 17136 0 16533 17 3 14 16 0 8 0 amappl 88 18187 0 18032 5 0 5 5 0 92 0 uvmvnodes 80 182 0 0 4 0 4 4 0 8 0 dma4096 4096 2 0 2 2 2 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 128 256 0 256 2 2 0 1 0 8 0 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 67 0 6 2 0 2 2 0 8 0 uaddrrnd 24 2155 0 2124 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2155 0 2124 1 0 1 1 0 8 0 vmmpekpl 168 17632 0 17580 3 0 3 3 0 8 0 vmmpepl 168 141282 0 139400 126 31 95 111 0 357 5 vmsppl 488 2154 0 2124 6 1 5 5 0 8 0 rwobjpl 80 38924 0 37745 41 9 32 34 0 8 0 pdppl 4096 4331 0 4255 123 45 78 87 0 8 2 pvpl 32 20522 0 0 166 0 166 166 0 265 0 pmappl 256 2161 0 2124 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 350 0 70 9 0 9 9 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 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 end of kernel end trace frame: 0x7d7697e794d0, count: 8 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 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 end of kernel end trace frame: 0x7d7697e794d0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff8000016ce000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffee7e0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffee7e0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2a48f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d9ddbf0,81,fffffd80097fd548,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c8cad60,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c8cad60,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c8cad60,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806c8cad60,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee7e0,ffff80002a2a4c60,ffff80002a2a4bb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2a4c60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2a4c60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x742a520f8e00, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff8000016ce000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffee7e0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffee7e0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2a48f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d9ddbf0,81,fffffd80097fd548,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c8cad60,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c8cad60,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c8cad60,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806c8cad60,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee7e0,ffff80002a2a4c60,ffff80002a2a4bb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2a4c60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2a4c60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x742a520f8e00, count: -12