uvm_fault(0xfffffd806b9f0200, 0x48, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND 519642 66669 0 0 0 0 syz-executor witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff800001513330,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000149a000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(11e5f,41,2000,ffff800033408fb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,41,2000,ffff800033408fb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c439250) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ffa2ea8,41,fffffd80097fb618,ffff800033408fb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80727ae518,ffff800033408fb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80727ae518,ffff800033408fb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80727ae518,ffff800033408fb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80727ae518,ffff800033408fb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800033408fb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800033408fb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800033408fb0,ffff80003c4395c0,ffff80003c439510) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4395c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4395c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 end trace frame: 0xffff80003c439640, 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(0xfffffd806b9f0200, 0x48, 0, 1) -> e ddb{1}> trace witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff800001513330,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000149a000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(11e5f,41,2000,ffff800033408fb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,41,2000,ffff800033408fb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c439250) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ffa2ea8,41,fffffd80097fb618,ffff800033408fb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80727ae518,ffff800033408fb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80727ae518,ffff800033408fb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80727ae518,ffff800033408fb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80727ae518,ffff800033408fb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800033408fb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800033408fb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800033408fb0,ffff80003c4395c0,ffff80003c439510) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4395c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4395c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bfe6ee28b70, count: -15 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4390b0 rbx 0 rdx 0 rcx 0xffff800033408fb0 rax 0xffff8000299edffe r8 0xffffffffffffffff r9 0x1 r10 0xd9538cd5d6fece07 r11 0xd59bf475e518a3a4 r12 0xfe r13 0x9 r14 0x28 r15 0 rip 0xffffffff82a9f835 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c439010 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (syz-executor) tid=139632 pid=95813 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=0, usrpri=50, slppri=0, nice=20 wchan=0x0, wmesg=, ps_single=0xffff800033408fb0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800033409a10,0xffff800033408a90 process=0xffff800039024500 user=0xffff80003c434000, vmspace=0xfffffd806b9f0200 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 66669 519642 87989 0 7 0 syz-executor 40922 159903 10618 0 3 0x80 fsleep syz-executor 40922 429236 10618 0 3 0x4000080 kqpoll syz-executor 56109 43287 30980 0 3 0x80 fsleep syz-executor 56109 232216 30980 0 3 0x4000080 piperd syz-executor 44786 364269 84160 0 3 0x80 fsleep syz-executor 44786 235332 84160 0 3 0x4000080 kqsel syz-executor 5642 21585 66018 0 3 0x80 fsleep syz-executor 5642 139224 66018 0 3 0x4000080 ttyout syz-executor 62281 391884 45846 0 3 0x80 fsleep syz-executor 62281 328748 45846 0 3 0x4000080 rest syz-executor 64665 404177 73521 0 3 0x80 fsleep syz-executor 64665 456384 73521 0 3 0x4000080 piperd syz-executor 87433 63525 0 0 3 0x14200 acct acct 10618 516340 11425 0 3 0x82 nanoslp syz-executor 20669 95677 0 0 3 0x14200 bored sosplice 45846 352792 11425 0 3 0x82 nanoslp syz-executor 66018 276471 11425 0 3 0x82 nanoslp syz-executor 73521 171780 11425 0 3 0x82 nanoslp syz-executor 92459 99507 11425 0 3 0x82 nanoslp syz-executor 30980 133502 11425 0 3 0x82 nanoslp syz-executor 87989 312497 11425 0 3 0x82 nanoslp syz-executor 84160 433412 11425 0 3 0x82 nanoslp syz-executor 11425 369406 37472 0 3 0x82 kqread syz-executor 37472 313355 57259 0 3 0x10008a sigsusp ksh 57259 18772 28353 0 3 0x98 kqread sshd-session 28353 93752 27742 0 3 0x92 kqread sshd-session 64874 454464 1 0 3 0x100083 ttyin getty 27742 71834 1 0 3 0x88 kqread sshd 77649 64985 9051 74 3 0x1100092 bpf pflogd 9051 98179 1 0 3 0x80 sbwait pflogd 36600 210385 21179 73 3 0x1100090 kqread syslogd 21179 280760 1 0 3 0x100082 sbwait syslogd 79641 176763 1 0 3 0x100080 kqread resolvd 87173 29229 97800 77 3 0x100092 kqread dhcpleased 25203 383887 97800 77 3 0x100092 kqread dhcpleased 97800 407657 1 0 3 0x80 kqread dhcpleased 17761 159028 0 0 3 0x14200 bored smr 90419 44358 0 0 3 0x14200 pgzero zerothread 42003 238246 0 0 3 0x14200 aiodoned aiodoned 96419 339554 0 0 3 0x14200 syncer update 99677 148900 0 0 3 0x14200 cleaner cleaner 79612 92421 0 0 3 0x14200 reaper reaper 50905 112263 0 0 3 0x14200 pgdaemon pagedaemon 98683 465416 0 0 3 0x14200 bored viomb 8604 363523 0 0 3 0x40014200 acpi0 acpi0 11247 514877 0 0 3 0x40014200 idle1 86839 439566 0 0 3 0x14200 bored softnet7 41889 30663 0 0 3 0x14200 bored softnet6 34952 140342 0 0 3 0x14200 bored softnet5 31758 443885 0 0 3 0x14200 bored softnet4 69092 503727 0 0 3 0x14200 bored softnet3 39233 124414 0 0 3 0x14200 bored softnet2 1381 130287 0 0 3 0x14200 bored softnet1 66079 176967 0 0 3 0x14200 bored softnet0 42621 266076 0 0 3 0x14200 bored systqmp 14164 383871 0 0 3 0x14200 bored systq 60054 77609 0 0 3 0x14200 tmoslp softclockmp 56817 520746 0 0 3 0x40014200 tmoslp softclock 75782 200759 0 0 3 0x40014200 idle0 1 185679 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 66669 (syz-executor) thread 0xffff800033408a80 (519642) exclusive rwlock vmmaplk r = 0 (0xfffffd800b027100) #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:5168 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1918 #4 uvm_fault_check+0x895 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x895 sys/uvm/uvm_fault.c:784 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 11045K 11326K 166960K 12124 0 pcb 18 15K 17K 166960K 451 0 rtable 187 9K 9K 166960K 424 0 pf 37 18K 82K 166960K 175 0 ifaddr 36 6K 8K 166960K 111 0 ifgroup 55 2K 2K 166960K 200 0 sysctl 4 1K 9K 166960K 14 0 counters 68 36K 38K 166960K 230 0 ioctlops 0 0K 4K 166960K 1630 0 iov 0 0K 24K 166960K 38 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 85K 166960K 2055 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 117 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 232K 166960K 1183 0 sigio 0 0K 0K 166960K 17 0 proc 72 115K 164K 166960K 652 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 158 0 in_multi 74 5K 7K 166960K 150 0 ether_multi 1 0K 0K 166960K 11 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 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 532 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 7 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 248 160K 193K 166960K 12484 0 UVM aobj 88 3K 3K 166960K 90 0 pinsyscall 43 86K 102K 166960K 2369 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 134 0 NDP 12 0K 1K 166960K 81 0 temp 64 8648K 8766K 166960K 57028 0 kqueue 14 22K 31K 166960K 238 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 120 145 0 142 2 1 1 2 0 8 0 rtentry 176 130 0 60 5 0 5 5 0 8 0 unpcb 144 942 0 922 8 6 2 4 0 8 1 syncache 336 14 0 14 4 3 1 1 0 8 1 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 416 0 410 8 6 2 7 0 8 1 arp 128 17 0 7 1 0 1 1 0 8 0 inpcb 328 1629 0 1617 20 16 4 10 0 8 2 nd6 144 22 0 7 1 0 1 1 0 8 0 pkpcb 40 9 0 9 3 3 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 66 0 66 2 1 1 1 0 8 1 pppxif 1504 9 0 9 3 3 0 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 9 0 4 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 74 0 22 1 0 1 1 0 8 0 pfstkey 128 78 0 26 2 0 2 2 0 8 0 pfstate 384 75 0 24 6 0 6 6 0 8 0 pfrule 1344 25 0 19 2 0 2 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 572 0 237 28 6 22 28 0 8 0 art_table 40 575 0 237 5 0 5 5 0 8 0 art_node 32 130 0 68 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 110 0 100 1 0 1 1 0 8 0 shmpl 112 87 0 2 3 0 3 3 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3574 0 2070 95 0 95 95 0 8 0 ffsino 296 3574 0 2070 117 0 117 117 0 8 0 nchpl 144 5184 0 3495 64 0 64 64 0 8 0 rtmask 32 9 0 9 4 3 1 1 0 8 1 uvmvnodes 80 3925 0 0 81 0 81 81 0 8 0 vnodes 216 3925 0 0 219 0 219 219 0 8 0 namei 1024 16814 0 16814 4 3 1 2 0 8 1 percpumem 16 130 0 81 1 0 1 1 0 8 0 kstatmem 264 130 0 102 5 2 3 3 0 8 1 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 6 0 6 3 3 0 1 0 8 0 scxspl 216 34185 0 34185 12 11 1 8 1 8 1 plimitpl 152 302 0 285 1 0 1 1 0 8 0 sigapl 424 1497 0 1441 7 0 7 7 0 8 0 knotepl 120 562 0 0 17 0 17 17 0 8 0 kqueuepl 224 493 0 482 6 5 1 5 0 8 0 pipepl 344 334 0 305 4 1 3 4 0 8 0 fdescpl 528 1471 0 1439 3 0 3 3 0 8 0 filepl 160 9315 0 9088 23 12 11 16 0 8 0 lockfpl 104 536 0 533 2 1 1 2 0 8 0 lockfspl 48 176 0 173 1 0 1 1 0 8 0 sessionpl 144 34 0 25 1 0 1 1 0 8 0 pgrppl 48 58 0 41 1 0 1 1 0 8 0 ucredpl 104 1094 0 1081 1 0 1 1 0 8 0 zombiepl 144 1476 0 1475 2 1 1 1 0 8 0 processpl 1248 1497 0 1441 5 0 5 5 0 8 0 procpl 664 3287 0 3225 9 2 7 7 0 8 0 sosppl 168 17 0 17 2 2 0 1 0 8 0 sockpl 752 2822 0 2787 32 24 8 18 0 8 3 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 1204 0 0 75 0 75 75 0 8 0 bufpl 280 14118 0 7975 440 1 439 440 0 8 0 anonpl 32 12191 0 0 99 0 99 99 0 246 0 amapchunkpl 152 41363 0 40777 51 13 38 38 0 158 14 amappl16 200 5618 0 5545 44 30 14 24 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 148 0 136 1 0 1 1 0 8 0 amappl13 176 26 0 26 1 1 0 1 0 8 0 amappl12 168 2159 0 2126 4 1 3 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 33 0 30 1 0 1 1 0 8 0 amappl7 128 126 0 114 1 0 1 1 0 8 0 amappl6 120 213 0 210 1 0 1 1 0 8 0 amappl5 112 132 0 122 1 0 1 1 0 8 0 amappl4 104 374 0 351 1 0 1 1 0 8 0 amappl3 96 8393 0 8279 5 1 4 4 0 8 0 amappl2 88 773 0 710 2 0 2 2 0 8 0 amappl1 80 15267 0 14651 18 1 17 17 0 8 0 amappl 88 11522 0 11346 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 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 2 2 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 89 0 2 2 0 2 2 0 8 0 uaddrrnd 24 1471 0 1439 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1471 0 1439 1 0 1 1 0 8 0 vmmpekpl 168 14281 0 14238 3 0 3 3 0 8 0 vmmpepl 168 101394 0 99302 128 20 108 109 0 357 5 vmsppl 488 1470 0 1439 6 1 5 5 0 8 1 rwobjpl 80 33599 0 28591 106 0 106 106 0 8 0 pdppl 4096 2950 0 2878 120 44 76 88 0 8 4 pvpl 32 20571 0 0 166 0 166 166 0 265 0 pmappl 256 1470 0 1439 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 370 0 68 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f4ff0) 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(ffffffff839041b0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839041b0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff839041b0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839041b0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 syscall(ffff80003c4a94b0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c4a94b0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75559d9e64a0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff837f4ff0) 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(ffffffff839041b0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839041b0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff839041b0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839041b0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 syscall(ffff80003c4a94b0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c4a94b0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75559d9e64a0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff800001513330,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000149a000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(11e5f,41,2000,ffff800033408fb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,41,2000,ffff800033408fb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c439250) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ffa2ea8,41,fffffd80097fb618,ffff800033408fb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80727ae518,ffff800033408fb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80727ae518,ffff800033408fb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80727ae518,ffff800033408fb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80727ae518,ffff800033408fb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800033408fb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800033408fb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800033408fb0,ffff80003c4395c0,ffff80003c439510) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4395c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4395c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 end trace frame: 0xffff80003c439640, count: 0 ddb{1}> trace witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff800001513330,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000149a000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(11e5f,41,2000,ffff800033408fb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,41,2000,ffff800033408fb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c439250) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ffa2ea8,41,fffffd80097fb618,ffff800033408fb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80727ae518,ffff800033408fb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80727ae518,ffff800033408fb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80727ae518,ffff800033408fb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80727ae518,ffff800033408fb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800033408fb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800033408fb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800033408fb0,ffff80003c4395c0,ffff80003c439510) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4395c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4395c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bfe6ee28b70, count: -15