uvm_fault(0xfffffd806cdb85e0, 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 303179 28814 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(ffff800001623d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff8000015c4000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(21e5f,3,2000,ffff8000fffe9a10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,3,2000,ffff8000fffe9a10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c43a560) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066811a50,3,fffffd80097fb410,ffff8000fffe9a10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80670656a8,ffff8000fffe9a10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80670656a8,ffff8000fffe9a10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80670656a8,ffff8000fffe9a10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80670656a8,ffff8000fffe9a10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9a10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9a10,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9a10,ffff80003c43a8d0,ffff80003c43a820) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c43a8d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43a8d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 end trace frame: 0xffff80003c43a950, 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(0xfffffd806cdb85e0, 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(ffff800001623d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff8000015c4000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(21e5f,3,2000,ffff8000fffe9a10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,3,2000,ffff8000fffe9a10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c43a560) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066811a50,3,fffffd80097fb410,ffff8000fffe9a10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80670656a8,ffff8000fffe9a10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80670656a8,ffff8000fffe9a10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80670656a8,ffff8000fffe9a10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80670656a8,ffff8000fffe9a10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9a10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9a10,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9a10,ffff80003c43a8d0,ffff80003c43a820) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c43a8d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43a8d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x781a7ab64790, count: -15 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c43a3c0 rbx 0 rdx 0 rcx 0xffff8000fffe9a10 rax 0xffff8000299edffe r8 0 r9 0x1 r10 0xb03d900121fe9d8d r11 0x3dbee149fd12820c r12 0xfe r13 0x9 r14 0x28 r15 0 rip 0xffffffff82c8d3b5 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c43a320 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (syz-executor) tid=391809 pid=3773 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffe9a10 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffe8a80,0xffff8000fffe8560 process=0xffff8000fffef9d8 user=0xffff80003c435000, vmspace=0xfffffd806cdb85e0 estcpu=33, cpticks=4, pctcpu=0.3, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28814 303179 93028 0 7 0 syz-executor 28814 352638 93028 0 2 0x4000000 syz-executor 34588 409163 99708 0 2 0 syz-executor 34588 456458 99708 0 3 0x4000080 fsleep syz-executor 29159 321847 36366 0 2 0 syz-executor 29159 187295 36366 0 3 0x4000080 ttyout syz-executor 29159 142734 36366 0 3 0x4000080 ttyout syz-executor 29159 87798 36366 0 3 0x4000080 fsleep syz-executor 33441 58637 3528 0 2 0 syz-executor 33441 343099 3528 0 3 0x4000080 fsleep syz-executor 33441 186157 3528 0 3 0x4000080 fsleep syz-executor 1665 284942 11569 0 2 0 syz-executor 1665 294867 11569 0 3 0x4000080 fifow syz-executor 1665 36847 11569 0 3 0x4000080 fifow syz-executor 1665 229212 11569 0 3 0x4000080 fsleep syz-executor 1665 262592 11569 0 3 0x4000080 fsleep syz-executor 22008 391403 0 0 3 0x14200 acct acct 3528 90796 68527 0 3 0x82 nanoslp syz-executor 11569 420606 68527 0 3 0x82 nanoslp syz-executor 36366 101843 68527 0 3 0x82 nanoslp syz-executor 77345 100908 68527 0 3 0x82 piperd syz-executor 99708 133191 68527 0 3 0x82 nanoslp syz-executor 77426 104728 68527 0 3 0x2 biowait syz-executor 93028 370877 68527 0 3 0x82 nanoslp syz-executor 51356 32882 68527 0 3 0x82 nanoslp syz-executor 68527 393873 74101 0 2 0x2 syz-executor 74101 142365 19253 0 3 0x10008a sigsusp ksh 19253 470929 84721 0 3 0x98 kqread sshd-session 84721 161513 52258 0 3 0x92 kqread sshd-session 51390 178925 1 0 3 0x100083 ttyin getty 52258 425375 1 0 3 0x88 kqread sshd 22297 438345 24017 74 3 0x1100092 bpf pflogd 24017 437610 1 0 3 0x80 sbwait pflogd 87141 118772 24175 73 3 0x1100090 kqread syslogd 24175 494974 1 0 3 0x100082 sbwait syslogd 34426 71123 1 0 3 0x100080 kqread resolvd 57698 301984 9422 77 3 0x100092 kqread dhcpleased 65472 279263 9422 77 3 0x100092 kqread dhcpleased 9422 331319 1 0 3 0x80 kqread dhcpleased 54863 204992 0 0 3 0x14200 bored smr 17760 501312 0 0 2 0x14200 zerothread 88116 344079 0 0 3 0x14200 aiodoned aiodoned 74031 377614 0 0 3 0x14200 syncer update 81174 495822 0 0 3 0x14200 cleaner cleaner 67226 214096 0 0 2 0x14200 reaper 36201 79128 0 0 3 0x14200 pgdaemon pagedaemon 17878 268780 0 0 3 0x14200 bored viomb 70340 441595 0 0 3 0x40014200 acpi0 acpi0 88394 204777 0 0 3 0x40014200 idle1 44322 139409 0 0 3 0x14200 bored softnet1 77259 460381 0 0 3 0x14200 bored softnet0 98776 402890 0 0 3 0x14200 bored systqmp 5557 203508 0 0 3 0x14200 bored systq 70803 327954 0 0 3 0x14200 tmoslp softclockmp 88366 278521 0 0 3 0x40014200 tmoslp softclock 72182 165596 0 0 3 0x40014200 idle0 1 21333 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 77426 (syz-executor) thread 0xffff80002a272010 (104728) exclusive rrwlock inode r = 0 (0xfffffd806dfe7c30) #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:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d089320) #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:765 #9 Xsyscall+0x128 Process 67226 (reaper) thread 0xffff8000ffffdc90 (214096) exclusive rwlock kmmaplk r = 0 (0xffffffff839d85e8) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 11127K 12341K 166960K 12330 0 pcb 19 13K 14K 166960K 309 0 rtable 219 11K 11K 166960K 612 0 pf 36 17K 19K 166960K 152 0 ifaddr 38 6K 8K 166960K 109 0 ifgroup 59 2K 2K 166960K 189 0 sysctl 4 1K 9K 166960K 86 0 counters 70 37K 38K 166960K 214 0 ioctlops 0 0K 4K 166960K 1879 0 iov 0 0K 28K 166960K 99 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1490 94K 94K 166960K 2518 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 23 3K 3K 166960K 35 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 1346 0 sigio 0 0K 0K 166960K 25 0 proc 72 115K 164K 166960K 648 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 179 0 in_multi 74 5K 7K 166960K 172 0 ether_multi 1 0K 0K 166960K 18 0 mrt 1 0K 0K 166960K 9 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 538 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 251 160K 169K 166960K 14252 0 UVM aobj 19 2K 2K 166960K 21 0 pinsyscall 41 82K 102K 166960K 2491 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 91 0 NDP 13 0K 2K 166960K 75 0 temp 79 8660K 8776K 166960K 58022 0 kqueue 14 22K 32K 166960K 265 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 120 254 0 250 5 2 3 3 0 8 2 rtentry 176 156 0 71 5 0 5 5 0 8 0 unpcb 144 837 0 818 8 6 2 6 0 8 1 syncache 336 6 0 6 3 3 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 459 0 453 13 6 7 7 0 8 6 arp 136 25 0 8 1 0 1 1 0 8 0 inpcb 328 1415 0 1403 15 8 7 7 0 8 5 nd6 152 31 0 9 1 0 1 1 0 8 0 pkpcb 40 12 0 12 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 57 0 57 3 2 1 1 0 8 1 pppxif 1504 8 0 8 2 1 1 1 0 8 1 pffrag 232 22 0 9 1 0 1 1 0 482 0 pffrnode 88 20 0 7 1 0 1 1 0 8 0 pffrent 40 35 0 22 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfstitem 24 104 0 37 1 0 1 1 0 8 0 pfstkey 128 104 0 37 3 0 3 3 0 8 0 pfstate 384 104 0 37 7 0 7 7 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 678 0 315 31 8 23 31 0 8 0 art_table 40 682 0 315 5 0 5 5 0 8 0 art_node 32 154 0 78 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 13 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 28 0 7 1 0 1 1 0 8 0 shmpl 112 18 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3985 0 2473 95 0 95 95 0 8 0 ffsino 296 3985 0 2473 117 0 117 117 0 8 0 nchpl 144 5862 0 4158 64 0 64 64 0 8 0 rtmask 32 8 0 8 2 1 1 1 0 8 1 vnodes 216 4580 0 0 255 0 255 255 0 8 0 namei 1024 20343 0 20342 6 5 1 3 0 8 0 percpumem 16 122 0 72 1 0 1 1 0 8 0 kstatmem 264 118 0 88 6 3 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 34851 0 34850 13 11 2 8 1 8 1 plimitpl 152 426 0 408 1 0 1 1 0 8 0 sigapl 424 1647 0 1600 8 2 6 7 0 8 0 knotepl 120 535 0 0 16 0 16 16 0 8 0 kqueuepl 224 684 0 672 13 8 5 5 0 8 4 pipepl 344 255 0 228 6 3 3 6 0 8 0 fdescpl 528 1619 0 1589 3 0 3 3 0 8 0 filepl 160 11151 0 10927 30 15 15 18 0 8 4 lockfpl 104 429 0 427 1 0 1 1 0 8 0 lockfspl 48 187 0 185 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 48 0 31 1 0 1 1 0 8 0 ucredpl 104 2017 0 2003 1 0 1 1 0 8 0 zombiepl 144 1996 0 1995 2 1 1 1 0 8 0 processpl 1232 1647 0 1600 5 1 4 5 0 8 0 procpl 664 3774 0 3715 8 2 6 8 0 8 0 sosppl 176 3 0 3 2 1 1 1 0 8 1 sockpl 752 2550 0 2515 36 25 11 24 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 73 0 0 9 0 9 9 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1688 0 0 104 0 104 104 0 8 0 bufpl 280 13639 0 7502 439 0 439 439 0 8 0 anonpl 32 13871 0 0 112 0 112 112 0 246 0 amapchunkpl 152 47021 0 46471 48 18 30 35 0 158 4 amappl16 200 5299 0 5261 52 37 15 31 0 8 7 amappl15 192 22 0 22 1 1 0 1 0 8 0 amappl14 184 3 0 3 2 2 0 1 0 8 0 amappl13 176 501 0 499 1 0 1 1 0 8 0 amappl12 168 1990 0 1949 3 0 3 3 0 8 0 amappl11 160 31 0 30 1 0 1 1 0 8 0 amappl10 152 46 0 32 1 0 1 1 0 8 0 amappl9 144 260 0 260 1 1 0 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 103 0 101 1 0 1 1 0 8 0 amappl6 120 301 0 287 1 0 1 1 0 8 0 amappl5 112 87 0 76 1 0 1 1 0 8 0 amappl4 104 453 0 424 1 0 1 1 0 8 0 amappl3 96 8462 0 8369 4 1 3 3 0 8 0 amappl2 88 1859 0 1782 2 0 2 2 0 8 0 amappl1 80 14895 0 14311 15 1 14 14 0 8 0 amappl 88 13270 0 13098 5 0 5 5 0 92 0 uvmvnodes 80 4580 0 0 94 0 94 94 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 128 255 0 255 3 3 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 20 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1619 0 1589 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1619 0 1589 1 0 1 1 0 8 0 vmmpekpl 168 14764 0 14719 3 0 3 3 0 8 0 vmmpepl 168 109003 0 107102 117 19 98 111 0 357 3 vmsppl 488 1618 0 1589 7 3 4 5 0 8 0 rwobjpl 80 35093 0 29546 115 1 114 114 0 8 0 pdppl 4096 3246 0 3178 108 36 72 84 0 8 4 pvpl 32 22416 0 0 183 2 181 181 0 265 0 pmappl 256 1618 0 1589 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 399 0 60 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837acff0) 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 end of kernel end trace frame: 0x7900ba32e9e0, count: 12 ddb{0}> trace x86_ipi_db(ffffffff837acff0) 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 end of kernel end trace frame: 0x7900ba32e9e0, count: -3 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(ffff800001623d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff8000015c4000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(21e5f,3,2000,ffff8000fffe9a10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,3,2000,ffff8000fffe9a10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c43a560) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066811a50,3,fffffd80097fb410,ffff8000fffe9a10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80670656a8,ffff8000fffe9a10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80670656a8,ffff8000fffe9a10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80670656a8,ffff8000fffe9a10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80670656a8,ffff8000fffe9a10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9a10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9a10,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9a10,ffff80003c43a8d0,ffff80003c43a820) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c43a8d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43a8d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 end trace frame: 0xffff80003c43a950, 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(ffff800001623d30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff8000015c4000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(21e5f,3,2000,ffff8000fffe9a10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,3,2000,ffff8000fffe9a10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c43a560) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066811a50,3,fffffd80097fb410,ffff8000fffe9a10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80670656a8,ffff8000fffe9a10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80670656a8,ffff8000fffe9a10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80670656a8,ffff8000fffe9a10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80670656a8,ffff8000fffe9a10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9a10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9a10,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9a10,ffff80003c43a8d0,ffff80003c43a820) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c43a8d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43a8d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x781a7ab64790, count: -15