login: uvm_fault(0xfffffd806c113208, 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 234561 29026 0 0x14000 0x200 0 reaper 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(ffff8000014b5d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148f000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,2,2000,ffff8000387f4a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff8000387f4a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c4075e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c194030,2,fffffd80097fb548,ffff8000387f4a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80674c6b88,ffff8000387f4a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80674c6b88,ffff8000387f4a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80674c6b88,ffff8000387f4a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80674c6b88,ffff8000387f4a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000387f4a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000387f4a80,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000387f4a80,ffff80003c407950,ffff80003c4078a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c407950) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c407950) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 end trace frame: 0xffff80003c4079d0, 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(0xfffffd806c113208, 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(ffff8000014b5d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148f000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,2,2000,ffff8000387f4a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff8000387f4a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c4075e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c194030,2,fffffd80097fb548,ffff8000387f4a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80674c6b88,ffff8000387f4a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80674c6b88,ffff8000387f4a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80674c6b88,ffff8000387f4a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80674c6b88,ffff8000387f4a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000387f4a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000387f4a80,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000387f4a80,ffff80003c407950,ffff80003c4078a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c407950) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c407950) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e62d3643da0, count: -15 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c407440 rbx 0 rdx 0 rcx 0xffff8000387f4a80 rax 0xffff8000299edffe r8 0x90 r9 0x1 r10 0xbd7e4e24e89eeb76 r11 0x37098a7b70caaac r12 0xfe r13 0x9 r14 0x28 r15 0 rip 0xffffffff825c1f25 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c4073a0 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (syz-executor) tid=481900 pid=7574 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000387f4a80 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000ffffc538,0xffff8000387f5a20 process=0xffff80003c429360 user=0xffff80003c402000, vmspace=0xfffffd806c113208 estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16666 250401 20298 0 2 0 syz-executor 16666 165296 20298 0 3 0x4000080 bell syz-executor 46236 225314 62366 0 2 0 syz-executor 46236 196184 62366 0 3 0x4000080 fsleep syz-executor 46236 184212 62366 0 3 0x4000080 fsleep syz-executor 46236 221116 62366 0 2 0x4000000 syz-executor 3719 406093 1 0 3 0x82 nanoslp getty 10546 85497 73894 0 2 0 syz-executor 10546 355466 73894 0 3 0x4000080 fsleep syz-executor 27565 201494 94554 0 2 0 syz-executor 27565 308465 94554 0 3 0x4000080 fsleep syz-executor 27565 324104 94554 0 3 0x4000080 pipewr syz-executor 27565 411564 94554 0 3 0x4000080 fsleep syz-executor 41429 132024 82960 0 2 0 syz-executor 41429 229746 82960 0 3 0x4000080 wsevent_read syz-executor 41429 234676 82960 0 3 0x4000080 fsleep syz-executor 72184 9303 95322 0 2 0x2 arp 95322 209754 70753 0 3 0x10008a sigsusp sh 70753 484979 84313 0 3 0x82 wait syz-executor 20298 215600 84313 0 3 0x82 nanoslp syz-executor 80180 363333 84313 0 3 0x2 biowait syz-executor 73894 21785 84313 0 2 0x2 syz-executor 62366 205584 84313 0 3 0x82 nanoslp syz-executor 94554 341348 84313 0 3 0x82 nanoslp syz-executor 58264 17704 84313 0 3 0x82 nanoslp syz-executor 82960 340785 84313 0 3 0x82 nanoslp syz-executor 84313 30141 87660 0 3 0x82 kqread syz-executor 87660 321387 6234 0 3 0x10008a sigsusp ksh 6234 117695 31107 0 3 0x98 kqread sshd-session 31107 437381 86388 0 3 0x92 kqread sshd-session 86388 464025 1 0 3 0x88 kqread sshd 65354 408013 73799 74 3 0x1100092 bpf pflogd 73799 430195 1 0 3 0x80 sbwait pflogd 22025 188491 71770 73 3 0x1100090 kqread syslogd 71770 265794 1 0 3 0x100082 sbwait syslogd 64970 122296 1 0 3 0x100080 kqread resolvd 22541 196294 20899 77 3 0x100092 kqread dhcpleased 93348 292417 20899 77 3 0x100092 kqread dhcpleased 20899 161676 1 0 3 0x80 kqread dhcpleased 18230 180693 0 0 3 0x14200 bored smr 41966 446653 0 0 2 0x14200 zerothread 64816 403986 0 0 3 0x14200 aiodoned aiodoned 86836 11798 0 0 3 0x14200 syncer update 38049 409250 0 0 3 0x14200 cleaner cleaner 29026 234561 0 0 7 0x14200 reaper 22475 372555 0 0 3 0x14200 pgdaemon pagedaemon 66950 283468 0 0 3 0x14200 bored viomb 39698 270444 0 0 3 0x40014200 acpi0 acpi0 87237 325196 0 0 3 0x40014200 idle1 27734 379021 0 0 3 0x14200 bored softnet1 14399 334477 0 0 2 0x14200 softnet0 92276 372891 0 0 3 0x14200 smrbar systqmp 43634 471729 0 0 3 0x14200 bored systq 44804 203330 0 0 3 0x14200 tmoslp softclockmp 66376 260475 0 0 3 0x40014200 tmoslp softclock 60468 249521 0 0 3 0x40014200 idle0 1 392145 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 80180 (syz-executor) thread 0xffff8000fffef240 (363333) exclusive rrwlock inode r = 0 (0xfffffd80677f98f8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c5ceb40) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 29026 (reaper) thread 0xffff8000ffffdc90 (234561) exclusive rwlock kmmaplk r = 0 (0xffffffff8388ab28) #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:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:831 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 Process 92276 (systqmp) thread 0xffff8000ffffe7c8 (372891) shared rwlock systqmp r = 0 (0xffffffff83879148) #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 10207 11136K 11194K 166960K 11446 0 pcb 18 12K 12K 166960K 22 0 rtable 223 6K 6K 166960K 341 0 pf 35 17K 21K 166960K 48 0 ifaddr 41 7K 7K 166960K 43 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 4K 166960K 1485 0 iov 0 0K 2K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1408 89K 89K 166960K 1448 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 147 0 proc 71 115K 147K 166960K 532 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 5 0 in_multi 89 6K 6K 166960K 91 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 37 175K 175K 166960K 37 0 exec 0 0K 1K 166960K 383 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 247 168K 179K 166960K 3372 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 43 86K 104K 166960K 1305 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 26 1K 1K 166960K 26 0 temp 35 8642K 8706K 166960K 4331 0 kqueue 13 20K 24K 166960K 26 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 39 0 35 1 0 1 1 0 8 0 rtentry 176 104 0 1 5 0 5 5 0 8 0 unpcb 144 35 0 18 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 11 0 5 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 81 0 71 1 0 1 1 0 8 0 nd6 152 21 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 3 0 2 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 pfstitem 24 18 0 0 1 0 1 1 0 8 0 pfstkey 128 18 0 0 1 0 1 1 0 8 0 pfstate 384 17 0 0 2 0 2 2 0 8 0 pfrule 1344 22 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 411 0 0 26 0 26 26 0 8 0 art_table 40 412 0 0 5 0 5 5 0 8 0 art_node 32 104 0 10 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1593 0 77 95 0 95 95 0 8 0 ffsino 296 1593 0 77 117 0 117 117 0 8 0 nchpl 144 1803 0 101 64 0 64 64 0 8 0 vnodes 216 1759 0 0 98 0 98 98 0 8 0 namei 1024 5566 0 5565 2 0 2 2 0 8 1 percpumem 16 49 0 0 1 0 1 1 0 8 0 kstatmem 264 26 0 0 2 0 2 2 0 8 0 scxspl 216 5859 0 5858 3 1 2 2 1 8 1 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 468 0 420 7 0 7 7 0 8 1 knotepl 120 56 0 0 2 0 2 2 0 8 0 kqueuepl 224 24 0 13 1 0 1 1 0 8 0 pipepl 344 123 0 93 3 0 3 3 0 8 0 fdescpl 528 452 0 420 3 0 3 3 0 8 0 filepl 160 1710 0 1487 12 0 12 12 0 8 2 lockfpl 104 18 0 16 1 0 1 1 0 8 0 lockfspl 48 7 0 5 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 30 0 14 1 0 1 1 0 8 0 ucredpl 104 91 0 78 1 0 1 1 0 8 0 zombiepl 144 421 0 420 1 0 1 1 0 8 0 processpl 1232 468 0 420 5 0 5 5 0 8 0 procpl 664 498 0 440 6 0 6 6 0 8 0 sockpl 752 163 0 132 4 0 4 4 0 8 0 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 109 0 0 14 0 14 14 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 123 0 0 8 0 8 8 0 8 0 bufpl 280 2334 0 129 158 0 158 158 0 8 0 anonpl 32 3917 0 0 32 0 32 32 0 246 0 amapchunkpl 152 9111 0 8613 20 0 20 20 0 158 0 amappl16 200 1950 0 1930 5 0 5 5 0 8 3 amappl15 192 4 0 4 1 0 1 1 0 8 1 amappl14 184 30 0 30 1 0 1 1 0 8 1 amappl13 176 437 0 435 1 0 1 1 0 8 0 amappl12 168 817 0 775 3 0 3 3 0 8 0 amappl11 160 4 0 4 1 0 1 1 0 8 1 amappl10 152 57 0 43 1 0 1 1 0 8 0 amappl9 144 321 0 321 1 0 1 1 0 8 1 amappl8 136 54 0 53 1 0 1 1 0 8 0 amappl7 128 83 0 82 1 0 1 1 0 8 0 amappl6 120 282 0 266 1 0 1 1 0 8 0 amappl5 112 77 0 66 1 0 1 1 0 8 0 amappl4 104 444 0 414 1 0 1 1 0 8 0 amappl3 96 1423 0 1329 3 0 3 3 0 8 0 amappl2 88 566 0 492 2 0 2 2 0 8 0 amappl1 80 9206 0 8599 15 1 14 14 0 8 0 amappl 88 2616 0 2449 4 0 4 4 0 92 0 uvmvnodes 80 1759 0 0 36 0 36 36 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 452 0 420 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 452 0 420 1 0 1 1 0 8 0 vmmpekpl 168 5552 0 5512 2 0 2 2 0 8 0 vmmpepl 168 37343 0 35425 88 0 88 88 0 357 2 vmsppl 488 451 0 420 5 0 5 5 0 8 0 rwobjpl 80 15441 0 12736 57 0 57 57 0 8 1 pdppl 4096 912 0 840 102 16 86 86 0 8 14 pvpl 32 10202 0 0 83 0 83 83 0 265 0 pmappl 256 451 0 420 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 265 0 18 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8378eff0) 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(ffffffff83917a50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83917a50) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a244600,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x16 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x16 sys/dev/kcov.c:153 reaper(ffff8000ffffdc90) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff8378eff0) 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(ffffffff83917a50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83917a50) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a244600,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x16 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x16 sys/dev/kcov.c:153 reaper(ffff8000ffffdc90) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -8 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(ffff8000014b5d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148f000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,2,2000,ffff8000387f4a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff8000387f4a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c4075e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c194030,2,fffffd80097fb548,ffff8000387f4a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80674c6b88,ffff8000387f4a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80674c6b88,ffff8000387f4a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80674c6b88,ffff8000387f4a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80674c6b88,ffff8000387f4a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000387f4a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000387f4a80,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000387f4a80,ffff80003c407950,ffff80003c4078a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c407950) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c407950) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 end trace frame: 0xffff80003c4079d0, 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(ffff8000014b5d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148f000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,2,2000,ffff8000387f4a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff8000387f4a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c4075e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c194030,2,fffffd80097fb548,ffff8000387f4a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80674c6b88,ffff8000387f4a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80674c6b88,ffff8000387f4a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80674c6b88,ffff8000387f4a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80674c6b88,ffff8000387f4a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000387f4a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000387f4a80,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000387f4a80,ffff80003c407950,ffff80003c4078a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c407950) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c407950) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e62d3643da0, count: -15