uvm_fault(0xfffffd806af647a0, 0x48, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0xa9: movl 0x20(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND 131142 29248 0 0 0 0 syz-executor *440504 64848 0 0 0x4000000 1K syz-executor witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x47 sys/kern/kern_lock.c:238 clockintr_unbind(ffff8000015c6c30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001492000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575 dtclose(11e5f,81,2000,ffff8000ffff2010) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff2010) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c419170) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80784ab870,81,fffffd807f7d2680,ffff8000ffff2010) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069b62608,ffff8000ffff2010) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069b62608,ffff8000ffff2010) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069b62608,ffff8000ffff2010) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8069b62608,ffff8000ffff2010) at closef+0x192 sys/kern/kern_descrip.c:1251 syscall(ffff80003c4193d0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4193d0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa18c2b1c3d0, 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(0xfffffd806af647a0, 0x48, 0, 1) -> e ddb{1}> trace witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x47 sys/kern/kern_lock.c:238 clockintr_unbind(ffff8000015c6c30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001492000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575 dtclose(11e5f,81,2000,ffff8000ffff2010) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff2010) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c419170) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80784ab870,81,fffffd807f7d2680,ffff8000ffff2010) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069b62608,ffff8000ffff2010) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069b62608,ffff8000ffff2010) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069b62608,ffff8000ffff2010) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8069b62608,ffff8000ffff2010) at closef+0x192 sys/kern/kern_descrip.c:1251 syscall(ffff80003c4193d0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4193d0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa18c2b1c3d0, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c418fe0 rbx 0 rdx 0xffff800001496900 rcx 0xffff8000ffff2010 rax 0xffff8000299ddff0 r8 0xffffffff822f7620 uvm_map_inentry_sp r9 0 r10 0 r11 0x2d8f09fda6be336d r12 0 r13 0x1 r14 0x28 r15 0x3 rip 0xffffffff81ee8829 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c418f30 ss 0x10 witness_checkorder+0xa9: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (syz-executor) tid=440504 pid=64848 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff2f70,0xffff8000ffff0550 process=0xffff80003a810990 user=0xffff80003c414000, vmspace=0xfffffd806af647a0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 42888 96785 66509 0 2 0 syz-executor 42888 408626 66509 0 2 0x4000000 syz-executor 42888 468050 66509 0 3 0x4000080 fsleep syz-executor 42888 281940 66509 0 3 0x4000080 fsleep syz-executor 29248 131142 87527 0 7 0 syz-executor 29248 177783 87527 0 2 0x4000000 syz-executor 27752 437131 71166 0 2 0 syz-executor 27752 95678 71166 0 3 0x4000080 fsleep syz-executor 27752 379190 71166 0 3 0x4000080 fsleep syz-executor 27752 511974 71166 0 3 0x4000080 fsleep syz-executor 64848 344072 76141 0 2 0 syz-executor *64848 440504 76141 0 7 0x4000000 syz-executor 96470 194630 98726 0 2 0 syz-executor 96470 27766 98726 0 3 0x4000080 msgwait syz-executor 789 438011 95450 0 3 0x80 nanoslp syz-executor 789 328763 95450 0 3 0x4000080 fsleep syz-executor 789 509794 95450 0 3 0x4000080 fifor syz-executor 789 129237 95450 0 3 0x4000080 fsleep syz-executor 80759 416543 90150 0 3 0x80 nanoslp syz-executor 80759 138038 90150 0 3 0x4000080 kqread syz-executor 80759 221389 90150 0 3 0x4000080 fsleep syz-executor 76141 509180 83948 0 3 0x82 nanoslp syz-executor 71166 291278 83948 0 3 0x82 nanoslp syz-executor 31595 494745 0 0 3 0x14200 acct acct 69396 154530 0 0 3 0x14200 bored sosplice 79383 131779 14932 0 3 0x100082 sbwait arp 14932 380915 58379 0 3 0x10008a sigsusp sh 90150 277822 83948 0 3 0x82 nanoslp syz-executor 95450 416693 83948 0 3 0x82 nanoslp syz-executor 87527 444736 83948 0 3 0x82 nanoslp syz-executor 98726 48536 83948 0 3 0x82 nanoslp syz-executor 66509 54764 83948 0 3 0x82 nanoslp syz-executor 58379 190149 83948 0 3 0x82 wait syz-executor 83948 167438 81049 0 2 0x2 syz-executor 81049 206086 23879 0 3 0x10008a sigsusp ksh 23879 505937 65579 0 3 0x98 kqread sshd-session 65579 129889 79792 0 3 0x92 kqread sshd-session 21059 357300 1 0 3 0x100083 ttyin getty 79792 119848 1 0 3 0x88 kqread sshd 54717 382972 16744 74 3 0x1100092 bpf pflogd 16744 256348 1 0 3 0x80 sbwait pflogd 14722 429530 30046 73 3 0x1100090 kqread syslogd 30046 430217 1 0 3 0x100082 sbwait syslogd 25877 423863 1 0 3 0x100080 kqread resolvd 74374 411542 74623 77 3 0x100092 kqread dhcpleased 12623 303830 74623 77 3 0x100092 kqread dhcpleased 74623 154048 1 0 3 0x80 kqread dhcpleased 87519 26902 0 0 3 0x14200 bored smr 56444 96063 0 0 2 0x14200 zerothread 18872 98753 0 0 3 0x14200 aiodoned aiodoned 65153 366338 0 0 3 0x14200 syncer update 5350 372855 0 0 3 0x14200 cleaner cleaner 62235 465928 0 0 3 0x14200 reaper reaper 91293 464401 0 0 3 0x14200 pgdaemon pagedaemon 88681 507325 0 0 3 0x14200 bored viomb 21176 457647 0 0 3 0x40014200 acpi0 acpi0 93456 138131 0 0 3 0x40014200 idle1 36870 58172 0 0 3 0x14200 bored softnet3 70084 103198 0 0 3 0x14200 bored softnet2 16536 116310 0 0 3 0x14200 bored softnet1 95645 472364 0 0 3 0x14200 bored softnet0 57861 56965 0 0 3 0x14200 bored systqmp 58875 478794 0 0 3 0x14200 bored systq 13873 115456 0 0 3 0x14200 tmoslp softclockmp 85430 300267 0 0 3 0x40014200 tmoslp softclock 49663 61350 0 0 3 0x40014200 idle0 1 220345 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 64848 (syz-executor) thread 0xffff8000ffff2010 (440504) exclusive rwlock dtlk r = 0 (0xffffffff83828a28) #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+0x367 sys/kern/kern_rwlock.c:311 #2 dt_ioctl_record_stop+0x68 sys/dev/dt/dt_dev.c:-1 #3 dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #3 dtclose+0x105 sys/dev/dt/dt_dev.c:232 #4 spec_close+0x45f sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #7 fdrop+0x126 sys/kern/kern_descrip.c:1267 #8 closef+0x192 sys/kern/kern_descrip.c:1251 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838d47b0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 vn_closefile+0x41 sys/kern/vfs_vnops.c:608 #2 fdrop+0x126 sys/kern/kern_descrip.c:1267 #3 closef+0x192 sys/kern/kern_descrip.c:1251 #4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 11063K 11763K 166960K 12643 0 pcb 84 16K 16K 166960K 199 0 rtable 167 7K 7K 166960K 506 0 pf 37 18K 21K 166960K 108 0 ifaddr 34 5K 7K 166960K 79 0 ifgroup 59 2K 2K 166960K 130 0 sysctl 2 1K 9K 166960K 8 0 counters 68 36K 37K 166960K 116 0 ioctlops 0 0K 4K 166960K 1599 0 iov 0 0K 16K 166960K 35 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1438 90K 91K 166960K 2209 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 17 5K 6K 166960K 34 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 114K 166960K 875 0 sigio 0 0K 0K 166960K 11 0 proc 72 91K 128K 166960K 673 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 1 0K 0K 166960K 226 0 in_multi 55 4K 6K 166960K 138 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 574 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 262 171K 180K 166960K 9426 0 UVM aobj 12 2K 2K 166960K 14 0 pinsyscall 45 90K 103K 166960K 2058 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 37 0 NDP 13 0K 1K 166960K 52 0 temp 54 8674K 8748K 166960K 31089 0 kqueue 14 22K 30K 166960K 155 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 120 156 0 152 2 1 1 2 0 8 0 rtentry 176 149 0 79 5 0 5 5 0 8 0 unpcb 144 700 0 681 6 5 1 6 0 8 0 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 373 0 367 16 7 9 14 0 8 8 arp 128 25 0 9 1 0 1 1 0 8 0 inpcb 384 1175 0 1096 13 5 8 8 0 8 0 nd6 144 31 0 17 1 0 1 1 0 8 0 pkpcb 40 9 0 9 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 13 0 13 2 1 1 1 0 8 1 pppxif 1504 3 0 3 2 1 1 1 0 8 1 pffrag 232 9 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 0 1 0 1 1 0 8 0 pffrent 40 13 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 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pfstitem 24 73 0 12 1 0 1 1 0 8 0 pfstkey 128 73 0 12 3 0 3 3 0 8 0 pfstate 384 73 0 12 7 0 7 7 0 8 0 pfrule 1344 24 0 16 2 0 2 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 589 0 317 27 9 18 27 0 8 0 art_table 32 593 0 317 4 0 4 4 0 8 0 art_node 16 147 0 83 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 6 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 26 0 11 1 0 1 1 0 8 0 shmpl 112 11 0 2 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 2824 0 1309 96 0 96 96 0 8 0 ffsino 288 2824 0 1309 109 0 109 109 0 8 0 nchpl 144 3990 0 2295 64 0 64 64 0 8 0 uvmvnodes 80 3524 0 0 72 0 72 72 0 8 0 vnodes 216 3524 0 0 196 0 196 196 0 8 0 namei 1024 14046 0 14046 1 0 1 1 0 8 1 percpumem 16 73 0 24 1 0 1 1 0 8 0 kstatmem 264 68 0 38 4 1 3 3 0 8 1 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 12799 0 12799 10 7 3 8 1 8 3 plimitpl 152 173 0 154 1 0 1 1 0 8 0 sigapl 424 1174 0 1121 7 0 7 7 0 8 0 knotepl 120 594 0 0 18 0 18 18 0 8 0 kqueuepl 224 229 0 219 2 0 2 2 0 8 1 pipepl 336 177 0 150 3 0 3 3 0 8 0 fdescpl 520 1154 0 1121 3 0 3 3 0 8 0 filepl 160 7136 0 6849 17 4 13 17 0 8 0 lockfpl 104 394 0 391 2 0 2 2 0 8 1 lockfspl 48 146 0 143 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 47 0 30 1 0 1 1 0 8 0 ucredpl 104 1076 0 1063 1 0 1 1 0 8 0 zombiepl 144 1121 0 1121 1 0 1 1 0 8 1 processpl 1208 1174 0 1121 5 0 5 5 0 8 0 procpl 656 2321 0 2254 6 0 6 6 0 8 0 srpgc 96 8 0 8 1 0 1 1 0 8 1 sosppl 168 4 0 4 2 1 1 1 0 8 1 sockpl 728 2053 0 1950 18 8 10 16 0 8 0 mcl64k 65536 4 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 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 34 0 0 5 1 4 5 0 8 0 mtagpl 96 61 0 0 2 0 2 2 0 8 0 mbufpl 256 230 0 0 14 0 14 14 0 8 0 bufpl 280 3975 0 125 275 0 275 275 0 8 0 anonpl 32 8538 0 0 69 0 69 69 0 246 0 amapchunkpl 152 30614 0 30061 37 5 32 32 0 158 7 amappl16 200 2665 0 2632 7 3 4 5 0 8 0 amappl15 192 8 0 8 2 2 0 1 0 8 0 amappl14 184 129 0 116 1 0 1 1 0 8 0 amappl13 176 2 0 2 2 1 1 1 0 8 1 amappl12 168 1850 0 1816 3 1 2 2 0 8 0 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 55 0 52 1 0 1 1 0 8 0 amappl7 128 138 0 125 1 0 1 1 0 8 0 amappl6 120 212 0 207 1 0 1 1 0 8 0 amappl5 112 134 0 124 1 0 1 1 0 8 0 amappl4 104 356 0 333 1 0 1 1 0 8 0 amappl3 96 6015 0 5895 4 0 4 4 0 8 0 amappl2 88 701 0 636 2 0 2 2 0 8 0 amappl1 80 11842 0 11209 16 1 15 15 0 8 0 amappl 88 8545 0 8362 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 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 7 0 7 2 1 1 1 0 8 1 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 13 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1154 0 1121 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1154 0 1121 1 0 1 1 0 8 0 vmmpekpl 168 10277 0 10228 3 0 3 3 0 8 0 vmmpepl 168 76453 0 74365 97 4 93 95 0 357 2 vmsppl 480 1153 0 1121 5 0 5 5 0 8 0 rwobjpl 72 24789 0 20257 83 0 83 83 0 8 0 pdppl 4096 2316 0 2242 110 34 76 84 0 8 2 pvpl 32 18305 0 0 149 1 148 148 0 265 0 pmappl 256 1153 0 1121 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 416 0 56 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837d7ff0) 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(ffffffff838d45a8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838d45a8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x751fdfdedb60, count: 8 ddb{0}> trace x86_ipi_db(ffffffff837d7ff0) 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(ffffffff838d45a8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838d45a8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x751fdfdedb60, count: -7 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0xa9: movl 0x20(%r14),%r15d witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x47 sys/kern/kern_lock.c:238 clockintr_unbind(ffff8000015c6c30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001492000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575 dtclose(11e5f,81,2000,ffff8000ffff2010) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff2010) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c419170) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80784ab870,81,fffffd807f7d2680,ffff8000ffff2010) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069b62608,ffff8000ffff2010) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069b62608,ffff8000ffff2010) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069b62608,ffff8000ffff2010) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8069b62608,ffff8000ffff2010) at closef+0x192 sys/kern/kern_descrip.c:1251 syscall(ffff80003c4193d0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4193d0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa18c2b1c3d0, count: 3 ddb{1}> trace witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x47 sys/kern/kern_lock.c:238 clockintr_unbind(ffff8000015c6c30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001492000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575 dtclose(11e5f,81,2000,ffff8000ffff2010) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff2010) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c419170) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80784ab870,81,fffffd807f7d2680,ffff8000ffff2010) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069b62608,ffff8000ffff2010) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069b62608,ffff8000ffff2010) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069b62608,ffff8000ffff2010) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8069b62608,ffff8000ffff2010) at closef+0x192 sys/kern/kern_descrip.c:1251 syscall(ffff80003c4193d0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4193d0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa18c2b1c3d0, count: -12