uvm_fault(0xfffffd800b0637a0, 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 149773 99376 0 0 0x4000000 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(ffff800001499130,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001482000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(41e60,1,2000,ffff80002a28b4d8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e60,1,2000,ffff80002a28b4d8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a3a09d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800e835c28,1,fffffd80097fd680,ffff80002a28b4d8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c70f5a0,ffff80002a28b4d8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c70f5a0,ffff80002a28b4d8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c70f5a0,ffff80002a28b4d8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c70f5a0,ffff80002a28b4d8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a28b4d8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a28b4d8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a28b4d8,ffff80002a3a0d40,ffff80002a3a0c90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a0d40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a0d40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 end trace frame: 0xffff80002a3a0dc0, 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(0xfffffd800b0637a0, 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(ffff800001499130,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001482000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(41e60,1,2000,ffff80002a28b4d8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e60,1,2000,ffff80002a28b4d8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a3a09d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800e835c28,1,fffffd80097fd680,ffff80002a28b4d8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c70f5a0,ffff80002a28b4d8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c70f5a0,ffff80002a28b4d8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c70f5a0,ffff80002a28b4d8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c70f5a0,ffff80002a28b4d8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a28b4d8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a28b4d8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a28b4d8,ffff80002a3a0d40,ffff80002a3a0c90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a0d40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a0d40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x759948c5ae30, count: -15 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3a0830 rbx 0 rdx 0 rcx 0xffff80002a28b4d8 rax 0xffff8000299edffe r8 0xffffffff82603be0 uvm_map_inentry_sp r9 0x1 r10 0x60d910ee8273b9c8 r11 0x1e70f66428ec0fbe r12 0xfe r13 0x9 r14 0x28 r15 0 rip 0xffffffff811ac045 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a3a0790 ss 0 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (syz-executor) tid=368922 pid=56285 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a28b4d8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffe9250,0xffff8000fffe8a98 process=0xffff8000fffe4e90 user=0xffff80002a39b000, vmspace=0xfffffd800b0637a0 estcpu=36, cpticks=7, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99376 522795 13331 0 2 0 syz-executor 99376 149773 13331 0 7 0x4000000 syz-executor 59239 455315 3209 0 2 0 syz-executor 59239 392485 3209 0 3 0x4000080 fsleep syz-executor 59239 381520 3209 0 2 0x4000000 syz-executor 1862 87705 1708 0 2 0 syz-executor 1862 349227 1708 0 3 0x4000080 fsleep syz-executor 1862 448510 1708 0 2 0x4000000 syz-executor 94560 153583 6001 0 2 0 syz-executor 94560 202116 6001 0 3 0x4000080 fsleep syz-executor 47799 183264 63675 0 3 0x80 nanoslp syz-executor 47799 90309 63675 0 3 0x4000080 sbwait syz-executor 47799 44389 63675 0 3 0x4000080 fsleep syz-executor 1708 255099 19172 0 3 0x82 nanoslp syz-executor 84726 436958 0 0 3 0x14200 acct acct 13331 57873 19172 0 3 0x82 nanoslp syz-executor 63675 306918 19172 0 3 0x82 nanoslp syz-executor 3209 219020 19172 0 3 0x82 nanoslp syz-executor 5983 341642 1 0 3 0x100083 ttyin getty 6001 117647 19172 0 3 0x82 nanoslp syz-executor 60904 475197 19172 0 3 0x82 wait syz-executor 35338 218338 19172 0 3 0x82 wait syz-executor 47344 249871 19172 0 3 0x82 nanoslp syz-executor 19172 262752 90983 0 3 0x82 kqread syz-executor 90983 261028 96102 0 3 0x10008a sigsusp ksh 96102 196346 85666 0 3 0x98 kqread sshd-session 85666 484954 15741 0 3 0x92 kqread sshd-session 15741 468703 1 0 3 0x88 kqread sshd 89615 67818 90911 74 3 0x1100092 bpf pflogd 90911 268927 1 0 3 0x80 sbwait pflogd 99743 42649 10370 73 3 0x1100090 kqread syslogd 10370 504064 1 0 3 0x100082 sbwait syslogd 18279 369681 1 0 3 0x100080 kqread resolvd 21223 36483 99527 77 3 0x100092 kqread dhcpleased 11554 166969 99527 77 3 0x100092 kqread dhcpleased 99527 16966 1 0 3 0x80 kqread dhcpleased 83577 395029 0 0 3 0x14200 bored smr 1212 34394 0 0 2 0x14200 zerothread 5747 497557 0 0 3 0x14200 aiodoned aiodoned 50556 466489 0 0 3 0x14200 syncer update 74863 412971 0 0 3 0x14200 cleaner cleaner 7445 113682 0 0 3 0x14200 reaper reaper 7675 83499 0 0 3 0x14200 pgdaemon pagedaemon 43670 413772 0 0 3 0x14200 bored viomb 47663 80900 0 0 3 0x40014200 acpi0 acpi0 55989 323438 0 0 3 0x40014200 idle1 62762 215421 0 0 3 0x14200 bored softnet1 87398 331305 0 0 3 0x14200 bored softnet0 81933 275253 0 0 3 0x14200 bored systqmp 14045 198133 0 0 3 0x14200 bored systq 39705 9154 0 0 3 0x14200 tmoslp softclockmp 14454 310263 0 0 3 0x40014200 tmoslp softclock 31287 374146 0 0 3 0x40014200 idle0 1 439387 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 1862 (syz-executor) thread 0xffff80002a28b240 (448510) exclusive rwlock vmmaplk r = 0 (0xfffffd80696766e0) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 47799 (syz-executor) thread 0xffff8000fffe8d20 (90309) exclusive rrwlock inode r = 0 (0xfffffd805cce9c78) #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 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 vn_open+0x15a sys/kern/vfs_vnops.c:140 #12 vndioctl+0xc43 sys/dev/vnd.c:458 #13 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #14 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #15 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #16 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #16 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #17 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10247 11138K 11911K 166960K 13961 0 pcb 17 16K 18K 166960K 568 0 rtable 231 13K 13K 166960K 876 0 pf 35 17K 21K 166960K 305 0 ifaddr 39 7K 9K 166960K 171 0 ifgroup 55 2K 2K 166960K 299 0 sysctl 4 1K 9K 166960K 14 0 counters 70 37K 38K 166960K 492 0 ioctlops 0 0K 4K 166960K 2147 0 iov 0 0K 16K 166960K 178 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1469 92K 93K 166960K 3155 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 23 136K 137K 166960K 90 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 2316 0 sigio 0 0K 0K 166960K 75 0 proc 75 115K 180K 166960K 877 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 0 0K 0K 166960K 391 0 in_multi 77 5K 7K 166960K 237 0 ether_multi 1 0K 0K 166960K 27 0 mrt 1 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 898 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 260 153K 169K 166960K 22848 0 UVM aobj 79 17K 19K 166960K 87 0 pinsyscall 43 86K 101K 166960K 3599 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 137 0 NDP 12 0K 1K 166960K 125 0 temp 79 8680K 9196K 166960K 109974 0 kqueue 14 22K 34K 166960K 412 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 120 175 0 172 1 0 1 1 0 8 0 rtentry 176 224 0 137 6 0 6 6 0 8 0 unpcb 144 1711 0 1688 12 8 4 8 0 8 3 syncache 336 17 0 17 4 3 1 1 0 8 1 tcpqe 32 8 0 8 3 2 1 1 0 8 1 tcpcb 736 698 0 687 12 4 8 8 0 8 5 arp 136 37 0 20 1 0 1 1 0 8 0 inpcb 328 2429 0 2408 17 7 10 10 0 8 6 nd6 152 49 0 29 2 0 2 2 0 8 0 pkpcb 40 9 0 9 4 3 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1192 182 0 182 2 1 1 1 0 8 1 pppxif 1504 10 0 10 4 3 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 15 0 5 1 0 1 1 0 482 0 pffrnode 88 12 0 3 1 0 1 1 0 8 0 pffrent 40 41 0 30 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 3 0 3 2 2 0 1 0 8 0 pfstitem 24 135 0 48 1 0 1 1 0 8 0 pfstkey 128 137 0 50 3 0 3 3 0 8 0 pfstate 448 136 0 49 11 0 11 11 0 8 0 pfrule 1344 23 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 934 0 594 31 5 26 30 0 8 0 art_table 40 938 0 594 5 0 5 5 0 8 0 art_node 32 224 0 146 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 18 2 1 1 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 85 0 64 1 0 1 1 0 8 0 shmpl 112 75 0 6 2 0 2 2 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 5549 0 4032 96 0 96 96 0 8 0 ffsino 296 5549 0 4032 118 0 118 118 0 8 0 nchpl 144 8737 0 7025 64 0 64 64 0 8 0 rtmask 32 32 0 32 3 2 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 30934 0 30934 3 2 1 2 0 8 1 percpumem 16 261 0 211 1 0 1 1 0 8 0 vcpupl 3968 7 0 0 1 0 1 1 0 8 0 vmpool 840 9 0 2 1 0 1 1 0 8 0 kstatmem 264 198 0 170 3 0 3 3 0 8 0 scsiplug 72 7 0 7 5 4 1 1 0 8 1 scxspl 216 50925 0 50925 10 9 1 8 1 8 1 plimitpl 152 774 0 755 2 1 1 2 0 8 0 sigapl 424 2593 0 2544 7 1 6 7 0 8 0 knotepl 120 550 0 0 16 0 16 16 0 8 0 kqueuepl 224 1089 0 1079 11 9 2 5 0 8 1 pipepl 344 390 0 362 6 3 3 6 0 8 0 fdescpl 528 2567 0 2535 3 0 3 3 0 8 0 filepl 160 18081 0 17840 30 13 17 22 0 8 3 lockfpl 104 806 0 804 2 1 1 2 0 8 0 lockfspl 48 346 0 344 1 0 1 1 0 8 0 sessionpl 144 42 0 33 1 0 1 1 0 8 0 pgrppl 48 81 0 64 1 0 1 1 0 8 0 ucredpl 104 2988 0 2974 1 0 1 1 0 8 0 zombiepl 144 3526 0 3523 1 0 1 1 0 8 0 processpl 1232 2593 0 2544 5 1 4 5 0 8 0 procpl 664 6314 0 6257 6 0 6 6 0 8 0 sosppl 176 26 0 26 5 4 1 1 0 8 1 sockpl 752 4576 0 4529 32 18 14 25 0 8 7 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 37 0 0 4 0 4 4 0 8 0 mtagpl 96 132 0 0 4 0 4 4 0 8 0 mbufpl 256 1540 0 0 95 0 95 95 0 8 0 bufpl 280 20684 0 14547 439 0 439 439 0 8 0 anonpl 32 12900 0 0 104 0 104 104 0 246 0 amapchunkpl 152 78816 0 78273 46 18 28 30 0 158 5 amappl16 200 8221 0 8181 54 39 15 32 0 8 4 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 12 0 12 1 1 0 1 0 8 0 amappl13 176 544 0 543 1 0 1 1 0 8 0 amappl12 168 3003 0 2960 3 0 3 3 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 27 0 25 1 0 1 1 0 8 0 amappl7 128 103 0 101 1 0 1 1 0 8 0 amappl6 120 373 0 359 1 0 1 1 0 8 0 amappl5 112 93 0 82 1 0 1 1 0 8 0 amappl4 104 518 0 488 1 0 1 1 0 8 0 amappl3 96 13926 0 13822 4 1 3 3 0 8 0 amappl2 88 2775 0 2695 3 1 2 3 0 8 0 amappl1 80 21889 0 21301 17 2 15 16 0 8 0 amappl 88 21597 0 21415 5 0 5 5 0 92 0 uvmvnodes 80 176 0 1 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 256 0 256 4 4 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 86 0 8 2 0 2 2 0 8 0 uaddrrnd 24 2567 0 2535 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2567 0 2535 1 0 1 1 0 8 0 vmmpekpl 168 22875 0 22823 3 0 3 3 0 8 0 vmmpepl 168 171205 0 169199 124 24 100 112 0 357 0 vmsppl 488 2566 0 2535 6 1 5 5 0 8 0 rwobjpl 80 46856 0 45648 38 6 32 36 0 8 0 pdppl 4096 5159 0 5081 131 53 78 83 0 8 0 pvpl 32 19705 0 0 160 1 159 159 0 265 0 pmappl 256 2575 0 2537 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 423 0 73 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83862ff0) 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(ffffffff8394e7c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8394e7c8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 doopenat(ffff8000fffe8fb8,ffffff9c,2000000000c0,8,0,ffff80002ebd26e0) at doopenat+0x345 sys/kern/vfs_syscalls.c:1138 syscall(ffff80002ebd2790) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebd2790) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x34328660640, count: 8 ddb{0}> trace x86_ipi_db(ffffffff83862ff0) 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(ffffffff8394e7c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8394e7c8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 doopenat(ffff8000fffe8fb8,ffffff9c,2000000000c0,8,0,ffff80002ebd26e0) at doopenat+0x345 sys/kern/vfs_syscalls.c:1138 syscall(ffff80002ebd2790) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebd2790) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x34328660640, count: -7 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(ffff800001499130,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001482000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(41e60,1,2000,ffff80002a28b4d8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e60,1,2000,ffff80002a28b4d8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a3a09d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800e835c28,1,fffffd80097fd680,ffff80002a28b4d8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c70f5a0,ffff80002a28b4d8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c70f5a0,ffff80002a28b4d8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c70f5a0,ffff80002a28b4d8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c70f5a0,ffff80002a28b4d8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a28b4d8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a28b4d8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a28b4d8,ffff80002a3a0d40,ffff80002a3a0c90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a0d40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a0d40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 end trace frame: 0xffff80002a3a0dc0, 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(ffff800001499130,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001482000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(41e60,1,2000,ffff80002a28b4d8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e60,1,2000,ffff80002a28b4d8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a3a09d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800e835c28,1,fffffd80097fd680,ffff80002a28b4d8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c70f5a0,ffff80002a28b4d8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c70f5a0,ffff80002a28b4d8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c70f5a0,ffff80002a28b4d8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c70f5a0,ffff80002a28b4d8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a28b4d8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a28b4d8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a28b4d8,ffff80002a3a0d40,ffff80002a3a0c90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a0d40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a0d40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x759948c5ae30, count: -15