uvm_fault(0xfffffd806434a5c8, 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 355620 4087 0 0 0x4000000 0 syz-executor witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000014eaa30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,1,2000,ffff80003c413c68) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003c413c68) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000307e89f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806424a8d0,1,fffffd80097fb208,ffff80003c413c68) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d030d40,ffff80003c413c68) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d030d40,ffff80003c413c68) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d030d40,ffff80003c413c68) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806d030d40,ffff80003c413c68) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c413c68) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c413c68,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c413c68,ffff8000307e8d60,ffff8000307e8cb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000307e8d60) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000307e8d60) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 end trace frame: 0xffff8000307e8de0, count: 0 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(0xfffffd806434a5c8, 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+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000014eaa30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,1,2000,ffff80003c413c68) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003c413c68) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000307e89f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806424a8d0,1,fffffd80097fb208,ffff80003c413c68) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d030d40,ffff80003c413c68) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d030d40,ffff80003c413c68) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d030d40,ffff80003c413c68) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806d030d40,ffff80003c413c68) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c413c68) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c413c68,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c413c68,ffff8000307e8d60,ffff8000307e8cb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000307e8d60) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000307e8d60) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7db64be93490, count: -15 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000307e8850 rbx 0 rdx 0 rcx 0xffff80003c413c68 rax 0xffff8000299ddff0 r8 0xffffffffffffffff r9 0x1 r10 0x5ecfa2e2ba57ff11 r11 0x192534e9983c433b r12 0 r13 0x1 r14 0x28 r15 0x3 rip 0xffffffff813d0309 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000307e87a0 ss 0x10 witness_checkorder+0xa9: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (syz-executor) tid=141925 pid=3114 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c413c68 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c4139d8,0xffff80003c412568 process=0xffff80003c416208 user=0xffff8000307e3000, vmspace=0xfffffd806434a5c8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4087 212733 11229 0 2 0 syz-executor 4087 355620 11229 0 7 0x4000000 syz-executor 13988 132566 71587 0 2 0 syz-executor 13988 385098 71587 0 3 0x4000080 fsleep syz-executor 84257 225419 66284 0 3 0x80 nanoslp syz-executor 84257 399898 66284 0 3 0x4000080 piperd syz-executor 84257 90824 66284 0 3 0x4000080 fsleep syz-executor 179 449662 38100 0 2 0 syz-executor 179 92002 38100 0 3 0x4000080 kqsel syz-executor 179 257150 38100 0 3 0x4000080 bell syz-executor 179 63117 38100 0 3 0x4000080 bell syz-executor 179 14931 38100 0 2 0x4000000 syz-executor 179 443510 38100 0 2 0x4000000 syz-executor 85753 235880 0 0 3 0x14200 acct acct 85843 262677 79363 0 3 0x82 nanoslp syz-executor 61967 322965 79363 0 3 0x82 nanoslp syz-executor 2479 45467 79363 0 3 0x82 nanoslp syz-executor 66284 520465 79363 0 3 0x82 nanoslp syz-executor 34052 418254 79363 0 2 0x2 syz-executor 14957 418929 1 0 3 0x80 nanoslp init 79360 264639 0 0 3 0x14200 bored sosplice 38100 476257 79363 0 3 0x82 nanoslp syz-executor 11229 293041 79363 0 2 0x2 syz-executor 71587 492292 79363 0 3 0x82 nanoslp syz-executor 79363 292847 38161 0 3 0x82 kqread syz-executor 38161 302456 29771 0 3 0x10008a sigsusp ksh 29771 51342 59095 0 3 0x98 kqread sshd-session 59095 223557 18413 0 3 0x92 kqread sshd-session 18413 463255 1 0 3 0x88 kqread sshd 67496 398912 59402 74 3 0x1100092 bpf pflogd 59402 93388 1 0 3 0x80 sbwait pflogd 26657 151106 44213 73 3 0x1100090 kqread syslogd 44213 111193 1 0 3 0x100082 sbwait syslogd 26294 283630 1 0 3 0x100080 kqread resolvd 37114 258985 72123 77 3 0x100092 kqread dhcpleased 18111 368709 72123 77 3 0x100092 kqread dhcpleased 72123 178273 1 0 3 0x80 kqread dhcpleased 22485 329301 0 0 3 0x14200 bored smr 62260 137334 0 0 2 0x14200 zerothread 31135 232475 0 0 3 0x14200 aiodoned aiodoned 30386 222075 0 0 3 0x14200 syncer update 6591 14560 0 0 3 0x14200 cleaner cleaner 18660 3566 0 0 3 0x14200 reaper reaper 63518 401701 0 0 3 0x14200 pgdaemon pagedaemon 3963 149844 0 0 3 0x14200 bored viomb 83172 338108 0 0 3 0x40014200 acpi0 acpi0 45569 118080 0 0 3 0x40014200 idle1 99878 168688 0 0 3 0x14200 bored softnet3 73354 212396 0 0 3 0x14200 bored softnet2 1146 107807 0 0 3 0x14200 bored softnet1 34977 476477 0 0 3 0x14200 bored softnet0 21425 394569 0 0 3 0x14200 bored systqmp 20452 396626 0 0 3 0x14200 bored systq 13373 427200 0 0 3 0x14200 tmoslp softclockmp 6256 460174 0 0 3 0x40014200 tmoslp softclock 20024 222387 0 0 3 0x40014200 idle0 1 280376 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 4087 (syz-executor) thread 0xffff80003c413228 (355620) exclusive rwlock uobjlk r = 0 (0xfffffd8073d75660) #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_lower_lookup+0x53 sys/uvm/uvm_fault.c:1236 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1370 #4 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd800b0274c0) #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 10223 11114K 11782K 166960K 12419 0 pcb 17 16K 23K 166960K 539 0 rtable 240 11K 11K 166960K 668 0 pf 35 17K 67485K 166960K 190 0 ifaddr 41 8K 8K 166960K 140 0 ifgroup 51 2K 2K 166960K 219 0 sysctl 4 1K 9K 166960K 83 0 counters 66 36K 37K 166960K 270 0 ioctlops 0 0K 4K 166960K 1875 0 iov 0 0K 28K 166960K 118 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1419 89K 90K 166960K 2789 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 27 16K 26K 166960K 38 0 dirhash 12 2K 2K 166960K 57 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1725 0 sigio 0 0K 0K 166960K 23 0 proc 63 79K 152K 166960K 873 0 subproc 72 4K 4K 166960K 119 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 182 0 in_multi 91 6K 7K 166960K 225 0 ether_multi 1 0K 0K 166960K 16 0 mrt 1 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 648 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 33 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 260 174K 187K 166960K 16905 0 UVM aobj 114 3K 3K 166960K 120 0 pinsyscall 42 84K 104K 166960K 2940 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 90 0 NDP 11 0K 2K 166960K 98 0 temp 78 8684K 8812K 166960K 91732 0 kqueue 13 20K 30K 166960K 349 0 SYN cache 2 8K 16K 166960K 3 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 120 149 0 146 1 0 1 1 0 8 0 rtentry 176 200 0 105 6 0 6 6 0 8 0 unpcb 144 1236 0 1218 9 5 4 5 0 8 3 syncache 336 9 0 9 4 4 0 1 0 8 0 tcpqe 32 3 0 3 3 3 0 1 0 8 0 tcpcb 736 644 0 635 16 9 7 7 0 8 6 arp 128 32 0 15 1 0 1 1 0 8 0 inpcb 328 2208 0 2196 23 16 7 12 0 8 5 nd6 144 42 0 19 1 0 1 1 0 8 0 pkpcb 40 45 0 45 3 2 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 4 0 4 2 2 0 1 0 8 0 ppxss 1192 83 0 83 3 2 1 1 0 8 1 pppxif 1504 6 0 6 2 1 1 1 0 8 1 pffrag 232 8 0 2 1 0 1 1 0 482 0 pffrnode 88 8 0 2 1 0 1 1 0 8 0 pffrent 40 13 0 7 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 3 0 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 6 0 2 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 31 0 19 1 0 1 1 0 8 0 pfstkey 128 31 0 19 1 0 1 1 0 8 0 pfstate 384 31 0 19 4 0 4 4 0 8 0 pfrule 1344 94 0 86 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 5 0 1 5 1 4 4 0 8 0 art_heap4 256 906 0 506 35 8 27 30 0 8 0 art_table 40 911 0 507 5 0 5 5 0 8 0 art_node 32 199 0 117 1 0 1 1 0 8 0 sysvmsgpl 40 70 0 67 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 31 0 6 1 0 1 1 0 8 0 shmpl 112 117 0 6 4 0 4 4 0 8 0 dirhash 1024 47 0 30 3 0 3 3 0 8 0 dino2pl 256 4705 0 3192 96 0 96 96 0 8 0 ffsino 288 4705 0 3192 109 0 109 109 0 8 0 nchpl 144 6974 0 5267 64 0 64 64 0 8 0 rtmask 32 9 0 9 3 3 0 1 0 8 0 uvmvnodes 80 5382 0 0 110 0 110 110 0 8 0 vnodes 216 5382 0 0 299 0 299 299 0 8 0 namei 1024 25006 0 25006 4 3 1 2 0 8 1 percpumem 16 150 0 102 1 0 1 1 0 8 0 kstatmem 264 146 0 122 4 2 2 3 0 8 0 scsiplug 72 5 0 5 3 2 1 1 0 8 1 scxspl 216 44564 0 44564 13 10 3 8 1 8 3 plimitpl 152 332 0 315 1 0 1 1 0 8 0 sigapl 424 1995 0 1943 7 1 6 7 0 8 0 knotepl 120 765 0 0 24 0 24 24 0 8 0 kqueuepl 224 641 0 630 7 2 5 5 0 8 3 pipepl 336 347 0 319 11 8 3 8 0 8 0 fdescpl 520 1972 0 1940 3 0 3 3 0 8 0 filepl 160 14386 0 14158 30 12 18 18 0 8 5 lockfpl 104 950 0 948 2 0 2 2 0 8 1 lockfspl 48 258 0 256 1 0 1 1 0 8 0 sessionpl 144 33 0 25 1 0 1 1 0 8 0 pgrppl 48 99 0 83 1 0 1 1 0 8 0 ucredpl 104 2311 0 2295 1 0 1 1 0 8 0 zombiepl 144 1947 0 1943 1 0 1 1 0 8 0 processpl 1240 1995 0 1943 5 0 5 5 0 8 0 procpl 656 4603 0 4542 8 1 7 7 0 8 0 sosppl 168 9 0 9 2 1 1 1 0 8 1 sockpl 728 3719 0 3686 35 24 11 15 0 8 7 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 7 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 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 52 0 0 7 0 7 7 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 1188 0 0 74 0 74 74 0 8 0 bufpl 280 18990 0 12848 440 1 439 440 0 8 0 anonpl 32 13986 0 0 113 0 113 113 0 246 0 amapchunkpl 152 63345 0 62673 47 6 41 41 0 158 11 amappl16 200 6776 0 6711 43 21 22 29 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 137 0 126 1 0 1 1 0 8 0 amappl13 176 4 0 4 2 2 0 1 0 8 0 amappl12 168 2703 0 2672 3 1 2 2 0 8 0 amappl11 160 55 0 40 1 0 1 1 0 8 0 amappl10 152 31 0 31 1 1 0 1 0 8 0 amappl9 144 243 0 243 1 1 0 1 0 8 0 amappl8 136 33 0 30 1 0 1 1 0 8 0 amappl7 128 122 0 111 1 0 1 1 0 8 0 amappl6 120 236 0 233 1 0 1 1 0 8 0 amappl5 112 163 0 152 1 0 1 1 0 8 0 amappl4 104 349 0 331 1 0 1 1 0 8 0 amappl3 96 11669 0 11550 4 0 4 4 0 8 0 amappl2 88 750 0 687 2 0 2 2 0 8 0 amappl1 80 16009 0 15434 15 1 14 15 0 8 0 amappl 88 15824 0 15636 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 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 128 256 0 256 3 2 1 1 0 8 1 dma64 64 9 0 9 3 3 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 72 119 0 6 3 0 3 3 0 8 0 uaddrrnd 24 1972 0 1940 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1972 0 1940 1 0 1 1 0 8 0 vmmpekpl 168 16717 0 16661 3 0 3 3 0 8 0 vmmpepl 168 130928 0 128861 123 10 113 113 0 357 9 vmsppl 480 1971 0 1940 6 1 5 5 0 8 0 rwobjpl 72 40525 0 34078 122 4 118 118 0 8 0 pdppl 4096 3952 0 3880 116 44 72 86 0 8 0 pvpl 32 23481 0 0 191 1 190 190 0 265 0 pmappl 256 1971 0 1940 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 511 0 83 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837e4ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff838cc958) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838cc958) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 doopenat(ffff80003c413228,ffffff9c,200000000000,100,0,ffff80003c44b000) at doopenat+0x314 sys/kern/vfs_syscalls.c:1137 syscall(ffff80003c44b0b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44b0b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe11f2515160, count: 7 ddb{0}> trace x86_ipi_db(ffffffff837e4ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff838cc958) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838cc958) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 doopenat(ffff80003c413228,ffffff9c,200000000000,100,0,ffff80003c44b000) at doopenat+0x314 sys/kern/vfs_syscalls.c:1137 syscall(ffff80003c44b0b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44b0b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe11f2515160, count: -8 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+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000014eaa30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,1,2000,ffff80003c413c68) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003c413c68) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000307e89f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806424a8d0,1,fffffd80097fb208,ffff80003c413c68) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d030d40,ffff80003c413c68) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d030d40,ffff80003c413c68) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d030d40,ffff80003c413c68) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806d030d40,ffff80003c413c68) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c413c68) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c413c68,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c413c68,ffff8000307e8d60,ffff8000307e8cb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000307e8d60) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000307e8d60) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 end trace frame: 0xffff8000307e8de0, count: 0 ddb{1}> trace witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000014eaa30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,1,2000,ffff80003c413c68) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003c413c68) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000307e89f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806424a8d0,1,fffffd80097fb208,ffff80003c413c68) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d030d40,ffff80003c413c68) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d030d40,ffff80003c413c68) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d030d40,ffff80003c413c68) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806d030d40,ffff80003c413c68) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c413c68) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c413c68,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c413c68,ffff8000307e8d60,ffff8000307e8cb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000307e8d60) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000307e8d60) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7db64be93490, count: -15