uvm_fault(0xfffffd806eec71e8, 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 517562 12008 0 0 0 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(ffff80000149cb30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001521000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,1,2000,ffff8000363f9218) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000363f9218) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a39d6c0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b04e560,1,fffffd80097fb618,ffff8000363f9218) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c8f4658,ffff8000363f9218) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c8f4658,ffff8000363f9218) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c8f4658,ffff8000363f9218) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805c8f4658,ffff8000363f9218) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff8000363f9218) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff8000363f9218,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff8000363f9218,ffff80002a39da30,ffff80002a39d980) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a39da30) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a39da30) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 end trace frame: 0xffff80002a39dab0, 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(0xfffffd806eec71e8, 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(ffff80000149cb30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001521000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,1,2000,ffff8000363f9218) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000363f9218) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a39d6c0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b04e560,1,fffffd80097fb618,ffff8000363f9218) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c8f4658,ffff8000363f9218) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c8f4658,ffff8000363f9218) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c8f4658,ffff8000363f9218) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805c8f4658,ffff8000363f9218) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff8000363f9218) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff8000363f9218,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff8000363f9218,ffff80002a39da30,ffff80002a39d980) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a39da30) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a39da30) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77b693d2e7d0, count: -15 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a39d520 rbx 0 rdx 0 rcx 0xffff8000363f9218 rax 0xffff8000299ddff0 r8 0xffffffffffffffff r9 0x1 r10 0x74025df0fe43d9b5 r11 0xc9cb768fad6662cb r12 0 r13 0x1 r14 0x28 r15 0x3 rip 0xffffffff82775e89 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a39d470 ss 0x10 witness_checkorder+0xa9: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (syz-executor) tid=99106 pid=87015 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000363f9218 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000363f8a68,0xffffffff8398d188 process=0xffff8000363febb8 user=0xffff80002a398000, vmspace=0xfffffd806eec71e8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34211 521586 69108 0 2 0 syz-executor 34211 18415 69108 0 3 0x4000080 fsleep syz-executor 41941 206349 61600 0 3 0x80 nanoslp syz-executor 41941 138023 61600 0 3 0x4000000 smrbar syz-executor 30542 159878 26295 0 2 0 syz-executor 30542 198231 26295 0 3 0x4000080 fsleep syz-executor 12008 517562 21992 0 7 0 syz-executor 12008 312013 21992 0 3 0x4000080 kqsel syz-executor 12008 523159 21992 0 3 0x4000080 fsleep syz-executor 96039 361218 71481 0 2 0 syz-executor 96039 338764 71481 0 3 0x4000080 fsleep syz-executor 96039 127653 71481 0 3 0x4000080 fsleep syz-executor 78642 428963 51962 60929 3 0x90 nanoslp syz-executor 78642 300813 51962 60929 3 0x4000090 kqread syz-executor 78642 389541 51962 60929 3 0x4000090 fsleep syz-executor 42392 513769 0 0 3 0x14200 acct acct 71481 291562 46976 0 3 0x82 nanoslp syz-executor 72745 455528 1 0 3 0x100083 ttyin getty 29055 481442 46976 0 3 0x82 nanoslp syz-executor 51962 106318 46976 0 3 0x82 nanoslp syz-executor 2968 322067 0 0 3 0x14200 bored sosplice 26295 52083 46976 0 3 0x82 nanoslp syz-executor 61600 80093 46976 0 3 0x82 nanoslp syz-executor 21992 350131 46976 0 3 0x82 nanoslp syz-executor 38760 196423 46976 0 2 0x10000002 syz-executor 69108 256880 46976 0 3 0x82 nanoslp syz-executor 46976 315795 27764 0 3 0x82 kqread syz-executor 27764 271722 80417 0 3 0x10008a sigsusp ksh 80417 482977 19796 0 3 0x98 kqread sshd-session 19796 312381 11091 0 3 0x92 kqread sshd-session 11091 499253 1 0 3 0x88 kqread sshd 10853 443884 87608 74 3 0x1100092 bpf pflogd 87608 170248 1 0 3 0x80 sbwait pflogd 35710 252613 85774 73 3 0x1100090 kqread syslogd 85774 217656 1 0 3 0x100082 sbwait syslogd 8267 52061 1 0 3 0x100080 kqread resolvd 93084 152186 6108 77 3 0x100092 kqread dhcpleased 63620 312809 6108 77 3 0x100092 kqread dhcpleased 6108 456999 1 0 3 0x80 kqread dhcpleased 88500 523248 0 0 3 0x14200 bored smr 15484 420677 0 0 2 0x14200 zerothread 60911 242429 0 0 3 0x14200 aiodoned aiodoned 82316 333582 0 0 3 0x14200 syncer update 16168 192463 0 0 3 0x14200 cleaner cleaner 63596 389624 0 0 3 0x14200 reaper reaper 8821 148613 0 0 3 0x14200 pgdaemon pagedaemon 75418 190547 0 0 3 0x14200 bored viomb 80124 123941 0 0 3 0x40014200 acpi0 acpi0 31859 284975 0 0 3 0x40014200 idle1 67510 28794 0 0 3 0x14200 bored softnet3 39473 17994 0 0 3 0x14200 bored softnet2 2412 72000 0 0 3 0x14200 bored softnet1 57557 83115 0 0 3 0x14200 bored softnet0 93302 498736 0 0 3 0x14200 bored systqmp 75936 422683 0 0 3 0x14200 bored systq 84770 181646 0 0 3 0x14200 tmoslp softclockmp 84843 210807 0 0 3 0x40014200 tmoslp softclock 64128 429548 0 0 3 0x40014200 idle0 1 122587 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 41941 (syz-executor) thread 0xffff80002a296f80 (138023) exclusive rwlock clonelk r = 0 (0xffffffff838824f8) #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 if_clone_destroy+0x67 sys/net/if.c:-1 #3 tun_dev_close+0x1dc sys/net/if_tun.c:523 #4 spec_close+0x412 sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #7 fdrop+0x126 sys/kern/kern_descrip.c:1267 #8 closef+0x192 sys/kern/kern_descrip.c:1251 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10241 11202K 11813K 166960K 13687 0 pcb 19 15K 16K 166960K 301 0 rtable 209 9K 10K 166960K 681 0 pf 41 18K 81K 166960K 152 0 ifaddr 40 6K 8K 166960K 112 0 ifgroup 63 2K 2K 166960K 174 0 sysctl 4 1K 9K 166960K 14 0 counters 72 37K 38K 166960K 210 0 ioctlops 0 0K 4K 166960K 1727 0 iov 0 0K 16K 166960K 136 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1390 87K 88K 166960K 2539 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 9K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 183 0 dirhash 12 2K 2K 166960K 63 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 110K 166960K 1493 0 sigio 0 0K 0K 166960K 90 0 proc 72 91K 128K 166960K 781 0 subproc 72 4K 4K 166960K 100 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 226 0 in_multi 84 6K 7K 166960K 174 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 538 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 243 175K 193K 166960K 14970 0 UVM aobj 103 5K 5K 166960K 109 0 pinsyscall 42 84K 103K 166960K 2691 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 3 0K 0K 166960K 70 0 NDP 14 0K 2K 166960K 76 0 temp 77 8688K 8816K 166960K 83211 0 kqueue 15 24K 28K 166960K 258 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 120 109 0 106 1 0 1 1 0 8 0 rtentry 176 196 0 111 6 0 6 6 0 8 0 unpcb 144 1008 0 984 10 8 2 6 0 8 1 syncache 336 10 0 10 5 4 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 539 0 533 16 15 1 7 0 8 0 arp 128 37 0 24 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 1769 0 1753 20 16 4 12 0 8 2 nd6 144 39 0 15 2 0 2 2 0 8 0 pkpcb 40 17 0 17 4 3 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 7 0 7 1 1 0 1 0 8 0 ppxss 1192 56 0 56 3 2 1 1 0 8 1 pppxif 1504 7 0 7 2 1 1 1 0 8 1 pffrag 232 14 0 4 1 0 1 1 0 482 0 pffrnode 88 12 0 3 1 0 1 1 0 8 0 pffrent 40 23 0 13 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 96 0 44 1 0 1 1 0 8 0 pfstkey 128 98 0 46 2 0 2 2 0 8 0 pfstate 384 97 0 45 6 0 6 6 0 8 0 pfrule 1344 25 0 19 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 687 0 306 33 5 28 29 0 8 2 art_table 32 689 0 306 4 0 4 4 0 8 0 art_node 16 191 0 121 1 0 1 1 0 8 0 sysvmsgpl 40 41 0 38 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 178 0 168 1 0 1 1 0 8 0 shmpl 112 106 0 6 3 0 3 3 0 8 0 dirhash 1024 52 0 35 3 0 3 3 0 8 0 dino2pl 256 4109 0 2602 95 0 95 95 0 8 0 ffsino 288 4109 0 2602 109 0 109 109 0 8 0 nchpl 144 6090 0 4386 64 0 64 64 0 8 0 rtmask 32 11 0 11 2 2 0 1 0 8 0 uvmvnodes 80 4870 0 0 100 0 100 100 0 8 0 vnodes 216 4870 0 0 271 0 271 271 0 8 0 namei 1024 22198 0 22198 3 2 1 2 0 8 1 percpumem 16 120 0 69 1 0 1 1 0 8 0 kstatmem 264 112 0 80 3 0 3 3 0 8 0 scsiplug 72 10 0 10 5 5 0 1 0 8 0 scxspl 216 47985 0 47985 12 11 1 8 1 8 1 plimitpl 152 264 0 247 1 0 1 1 0 8 0 sigapl 424 1815 0 1763 11 2 9 9 0 8 2 knotepl 120 617 0 0 17 0 17 17 0 8 0 kqueuepl 224 575 0 563 9 4 5 5 0 8 4 pipepl 336 230 0 203 3 0 3 3 0 8 0 fdescpl 520 1771 0 1740 3 0 3 3 0 8 0 filepl 160 11725 0 11486 24 11 13 16 0 8 2 lockfpl 104 715 0 712 1 0 1 1 0 8 0 lockfspl 48 263 0 260 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 128 0 111 1 0 1 1 0 8 0 ucredpl 104 1554 0 1539 1 0 1 1 0 8 0 zombiepl 144 1765 0 1763 2 1 1 1 0 8 0 processpl 1240 1815 0 1763 6 0 6 6 0 8 0 procpl 656 4004 0 3943 9 1 8 8 0 8 0 srpgc 96 16 0 16 4 3 1 1 0 8 1 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 728 2983 0 2939 31 24 7 16 0 8 2 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 15 0 15 15 0 8 0 mcl2k 2048 50 0 0 6 0 6 6 0 8 0 mtagpl 96 21 0 0 1 0 1 1 0 8 0 mbufpl 256 1170 0 0 74 0 74 74 0 8 0 bufpl 280 20532 0 14390 439 0 439 439 0 8 0 anonpl 32 11175 0 0 90 0 90 90 0 246 0 amapchunkpl 152 50418 0 49921 47 18 29 30 0 158 9 amappl16 200 7288 0 7255 52 37 15 27 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 135 0 123 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2489 0 2458 3 1 2 2 0 8 0 amappl11 160 58 0 44 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 253 0 252 1 0 1 1 0 8 0 amappl8 136 38 0 36 1 0 1 1 0 8 0 amappl7 128 120 0 108 1 0 1 1 0 8 0 amappl6 120 219 0 215 1 0 1 1 0 8 0 amappl5 112 139 0 129 1 0 1 1 0 8 0 amappl4 104 350 0 330 1 0 1 1 0 8 0 amappl3 96 10222 0 10107 4 0 4 4 0 8 0 amappl2 88 738 0 673 2 0 2 2 0 8 0 amappl1 80 15464 0 14855 15 0 15 15 0 8 0 amappl 88 13921 0 13752 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 2 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 128 256 0 256 3 3 0 1 0 8 0 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 108 0 6 2 0 2 2 0 8 0 uaddrrnd 24 1771 0 1740 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1771 0 1740 1 0 1 1 0 8 0 vmmpekpl 168 15300 0 15242 3 0 3 3 0 8 0 vmmpepl 168 118318 0 116309 123 17 106 110 0 357 9 vmsppl 480 1770 0 1740 5 0 5 5 0 8 0 rwobjpl 72 38215 0 32294 112 1 111 111 0 8 3 pdppl 4096 3549 0 3480 115 44 71 83 0 8 2 pvpl 32 18350 0 0 149 1 148 148 0 265 0 pmappl 256 1770 0 1740 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 490 0 74 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8380eff0) 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: 0x7150e1eda4a0, count: 12 ddb{0}> trace x86_ipi_db(ffffffff8380eff0) 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: 0x7150e1eda4a0, count: -3 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(ffff80000149cb30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001521000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,1,2000,ffff8000363f9218) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000363f9218) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a39d6c0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b04e560,1,fffffd80097fb618,ffff8000363f9218) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c8f4658,ffff8000363f9218) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c8f4658,ffff8000363f9218) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c8f4658,ffff8000363f9218) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805c8f4658,ffff8000363f9218) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff8000363f9218) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff8000363f9218,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff8000363f9218,ffff80002a39da30,ffff80002a39d980) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a39da30) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a39da30) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 end trace frame: 0xffff80002a39dab0, 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(ffff80000149cb30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001521000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(11e5f,1,2000,ffff8000363f9218) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000363f9218) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a39d6c0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b04e560,1,fffffd80097fb618,ffff8000363f9218) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c8f4658,ffff8000363f9218) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c8f4658,ffff8000363f9218) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c8f4658,ffff8000363f9218) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805c8f4658,ffff8000363f9218) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff8000363f9218) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff8000363f9218,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff8000363f9218,ffff80002a39da30,ffff80002a39d980) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a39da30) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a39da30) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77b693d2e7d0, count: -15