witness: lock order reversal: 1st 0xffff8000299dee30 &cq->cq_mtx (&cq->cq_mtx) 2nd 0xffffffff83915588 &sched_lock (&sched_lock) lock order [1] &cq->cq_mtx (&cq->cq_mtx) -> [2] &sched_lock (&sched_lock) #0 mtx_enter+0x95 sys/kern/kern_lock.c:406 #1 sleep_setup+0xed sys/kern/kern_synch.c:304 #2 msleep_nsec+0x10b sys/kern/kern_synch.c:217 #3 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 #4 dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #4 dtclose+0x109 sys/dev/dt/dt_dev.c:239 #5 spec_close+0x466 sys/kern/spec_vnops.c:-1 #6 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #8 fdrop+0x121 sys/kern/kern_descrip.c:1280 #9 closef+0x192 sys/kern/kern_descrip.c:1264 #10 fdfree+0x116 sys/kern/kern_descrip.c:1195 #11 exit1+0x576 sys/kern/kern_exit.c:215 #12 sys_exit+0x1a sys/kern/kern_exit.c:-1 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #14 Xsyscall+0x128 lock order [2] &sched_lock (&sched_lock) -> [1] &cq->cq_mtx (&cq->cq_mtx) #0 mtx_enter+0x95 sys/kern/kern_lock.c:406 #1 clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 #2 mi_switch+0x187 sys/kern/sched_bsd.c:376 #3 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #4 sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline] #4 sys_futex+0xb90 sys/kern/sys_futex.c:155 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffffffff83915588,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 mtx_enter(ffffffff83915578) at mtx_enter+0x95 sys/kern/kern_lock.c:406 sleep_setup(ffff8000299dee80,220,ffffffff8342dee8) at sleep_setup+0xed sys/kern/kern_synch.c:304 msleep_nsec(ffff8000299dee80,ffff8000299dee20,220,ffffffff8342dee8,ffffffffffffffff) at msleep_nsec+0x10b sys/kern/kern_synch.c:217 dt_ioctl_record_stop(ffff80000159e000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,81,2000,ffff8000fffef4d8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffef4d8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000357e5d60) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807e5128b8,81,fffffd80097fd548,ffff8000fffef4d8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c7740d8,ffff8000fffef4d8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c7740d8,ffff8000fffef4d8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c7740d8,ffff8000fffef4d8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c7740d8,ffff8000fffef4d8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffef4d8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffef4d8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffef4d8,ffff8000357e60d0,ffff8000357e6020) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000357e60d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000357e60d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x797545f67900, count: -17 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000357e5a30 rbx 0 rdx 0 rcx 0xffff8000fffef4d8 rax 0xffffffff8389cff0 cpu_info_full_primary+0x1ff0 r8 0xffff8000357e5910 r9 0x8080808080808080 r10 0xdf263a8b9fe8f174 r11 0x6135bb553b02fd2 r12 0xfffffd8003f4ce40 r13 0xfffffd80046f7330 r14 0x3 r15 0xffffffff8341ed46 substchar+0xb9ee rip 0xffffffff81fbe8e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000357e5a20 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=205625 pid=92711 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffef4d8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800034fdd4e8,0xffffffff83911d78 process=0xffff8000fffeb9d8 user=0xffff8000357e1000, vmspace=0xfffffd806c9515d0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17383 364918 48734 0 3 0x80 fsleep syz-executor 17383 77571 48734 0 3 0x4000080 ttyout syz-executor 96983 428546 53071 0 3 0x80 fsleep syz-executor 96983 30283 53071 0 3 0x4000080 kqread syz-executor 81102 167904 46332 60928 3 0x90 fsleep syz-executor 81102 423688 46332 60928 3 0x4000090 netcon syz-executor 71972 50075 16007 0 3 0x80 fsleep syz-executor 71972 288043 16007 0 3 0x4000080 fsleep syz-executor 71972 349873 16007 0 3 0x4000080 ttyout syz-executor 46332 122876 15526 0 3 0x82 nanoslp syz-executor 17645 141478 78053 0 3 0x80 fsleep syz-executor 17645 175304 78053 0 3 0x4000080 kqpoll syz-executor 16007 489644 15526 0 3 0x82 nanoslp syz-executor 39448 64003 0 0 3 0x14200 acct acct 88704 309194 19771 0 3 0x100082 sbwait arp 19771 494967 7167 0 3 0x10008a sigsusp sh 37355 200001 15526 0 7 0x2 syz-executor 83828 151692 15526 0 3 0x82 nanoslp syz-executor 78053 485811 15526 0 3 0x82 nanoslp syz-executor 7167 162435 15526 0 3 0x82 wait syz-executor 53071 368344 15526 0 3 0x82 nanoslp syz-executor 48734 508306 15526 0 3 0x82 nanoslp syz-executor 15526 367213 13800 0 3 0x82 kqread syz-executor 13800 170737 27829 0 3 0x10008a sigsusp ksh 27829 7806 88563 0 3 0x98 kqread sshd-session 88563 246351 25971 0 3 0x92 kqread sshd-session 26960 447884 1 0 3 0x100083 ttyopn getty 25971 237572 1 0 3 0x88 kqread sshd 41659 22041 91828 74 3 0x1100092 bpf pflogd 91828 241074 1 0 3 0x80 sbwait pflogd 74870 143056 31797 73 3 0x1100090 kqread syslogd 31797 300519 1 0 3 0x100082 sbwait syslogd 17609 450674 1 0 3 0x100080 kqread resolvd 29009 119223 30077 77 3 0x100092 kqread dhcpleased 83930 206075 30077 77 3 0x100092 kqread dhcpleased 30077 396871 1 0 3 0x80 kqread dhcpleased 32412 406624 0 0 3 0x14200 bored smr 82929 230654 0 0 3 0x14200 pgzero zerothread 83299 260655 0 0 3 0x14200 aiodoned aiodoned 25229 503934 0 0 3 0x14200 syncer update 31981 73028 0 0 3 0x14200 cleaner cleaner 37949 471997 0 0 2 0x14200 reaper 20809 385383 0 0 3 0x14200 pgdaemon pagedaemon 55461 160971 0 0 3 0x14200 bored viomb 85884 183235 0 0 3 0x40014200 acpi0 acpi0 34270 262800 0 0 3 0x40014200 idle1 87882 423755 0 0 3 0x14200 bored softnet1 18014 485399 0 0 3 0x14200 bored softnet0 60866 260776 0 0 3 0x14200 bored systqmp 19403 196273 0 0 3 0x14200 bored systq 65756 177295 0 0 3 0x14200 tmoslp softclockmp 27090 303962 0 0 3 0x40014200 tmoslp softclock 82227 440524 0 0 3 0x40014200 idle0 1 223385 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &cq->cq_mtx r = 0 (0xffff8000299dee30) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 #3 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 #4 dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #4 dtclose+0x109 sys/dev/dt/dt_dev.c:239 #5 spec_close+0x466 sys/kern/spec_vnops.c:-1 #6 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #8 fdrop+0x121 sys/kern/kern_descrip.c:1280 #9 closef+0x192 sys/kern/kern_descrip.c:1264 #10 fdfree+0x116 sys/kern/kern_descrip.c:1195 #11 exit1+0x576 sys/kern/kern_exit.c:215 #12 sys_exit+0x1a sys/kern/kern_exit.c:-1 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #14 Xsyscall+0x128 Process 37355 (syz-executor) thread 0xffff8000fffee018 (200001) exclusive rrwlock inode r = 0 (0xfffffd807a711a48) #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+0xbd 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 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d0e8200) #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+0xbd 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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11070 12112K 12526K 166960K 13340 0 pcb 17 15K 17K 166960K 258 0 rtable 212 10K 10K 166960K 493 0 pf 36 17K 80K 166960K 123 0 ifaddr 40 7K 7K 166960K 99 0 ifgroup 57 2K 2K 166960K 160 0 sysctl 4 1K 9K 166960K 12 0 counters 72 37K 37K 166960K 200 0 ioctlops 0 0K 4K 166960K 1588 0 iov 0 0K 24K 166960K 45 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1421 89K 90K 166960K 2195 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 151 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 893 0 sigio 0 0K 0K 166960K 11 0 proc 72 115K 164K 166960K 651 0 subproc 72 4K 4K 166960K 91 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 106 0 in_multi 78 5K 6K 166960K 145 0 ether_multi 1 0K 0K 166960K 11 0 mrt 1 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 579 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 247 161K 176K 166960K 10033 0 UVM aobj 31 10K 10K 166960K 36 0 pinsyscall 44 88K 106K 166960K 2098 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 70 0 NDP 13 0K 1K 166960K 69 0 temp 63 8677K 8743K 166960K 41545 0 kqueue 14 22K 32K 166960K 207 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 120 159 0 154 3 2 1 3 0 8 0 rtentry 176 147 0 62 5 0 5 5 0 8 0 unpcb 144 496 0 474 3 1 2 2 0 8 1 syncache 336 9 0 9 2 1 1 1 0 8 1 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 273 0 267 7 6 1 7 0 8 0 arp 136 22 0 7 1 0 1 1 0 8 0 inpcb 328 1042 0 1032 9 7 2 7 0 8 1 nd6 152 31 0 10 1 0 1 1 0 8 0 pkpcb 40 38 0 38 2 2 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 54 0 53 1 0 1 1 0 8 0 pppxif 1504 4 0 4 2 2 0 1 0 8 0 pffrag 232 6 0 0 1 0 1 1 0 482 0 pffrnode 88 6 0 0 1 0 1 1 0 8 0 pffrent 40 10 0 3 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 rttmr 136 3 0 3 3 2 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 590 0 214 30 3 27 27 0 8 1 art_table 40 593 0 214 5 0 5 5 0 8 0 art_node 32 145 0 69 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 148 0 138 1 0 1 1 0 8 0 shmpl 112 28 0 3 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3178 0 1665 95 0 95 95 0 8 0 ffsino 296 3178 0 1665 117 0 117 117 0 8 0 nchpl 144 4355 0 2648 64 0 64 64 0 8 0 rtmask 32 16 0 16 2 1 1 1 0 8 1 vnodes 216 3686 0 0 205 0 205 205 0 8 0 namei 1024 14912 0 14912 3 2 1 2 0 8 1 percpumem 16 115 0 64 1 0 1 1 0 8 0 vcpupl 3968 3 0 0 1 0 1 1 0 8 0 vmpool 848 5 0 2 1 0 1 1 0 8 0 kstatmem 264 102 0 74 4 1 3 3 0 8 1 scsiplug 72 6 0 6 1 1 0 1 0 8 0 scxspl 216 36889 0 36889 12 11 1 8 1 8 1 plimitpl 152 368 0 351 1 0 1 1 0 8 0 sigapl 424 1207 0 1158 7 0 7 7 0 8 0 knotepl 120 550 0 0 17 0 17 17 0 8 0 kqueuepl 224 279 0 268 2 1 1 2 0 8 0 pipepl 344 191 0 164 3 0 3 3 0 8 0 fdescpl 528 1190 0 1158 3 0 3 3 0 8 0 filepl 160 7061 0 6834 15 3 12 13 0 8 2 lockfpl 104 262 0 259 1 0 1 1 0 8 0 lockfspl 48 115 0 112 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 137 0 120 1 0 1 1 0 8 0 ucredpl 104 1102 0 1088 1 0 1 1 0 8 0 zombiepl 144 1159 0 1158 1 0 1 1 0 8 0 processpl 1232 1207 0 1158 5 0 5 5 0 8 0 procpl 664 2490 0 2434 6 0 6 6 0 8 0 sosppl 176 7 0 7 3 2 1 1 0 8 1 sockpl 752 1765 0 1728 14 9 5 11 0 8 0 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 54 0 0 6 1 5 6 0 8 0 mtagpl 96 37 0 0 1 0 1 1 0 8 0 mbufpl 256 818 0 0 51 0 51 51 0 8 0 bufpl 280 15692 0 9556 439 0 439 439 0 8 0 anonpl 32 11209 0 0 91 0 91 91 0 246 0 amapchunkpl 152 33241 0 32759 31 8 23 30 0 158 2 amappl16 200 5768 0 5736 41 27 14 26 0 8 7 amappl15 192 30 0 29 1 0 1 1 0 8 0 amappl14 184 4 0 4 1 1 0 1 0 8 0 amappl13 176 449 0 447 1 0 1 1 0 8 0 amappl12 168 1579 0 1535 3 0 3 3 0 8 0 amappl11 160 14 0 14 1 1 0 1 0 8 0 amappl10 152 144 0 130 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 31 0 28 1 0 1 1 0 8 0 amappl7 128 89 0 87 1 0 1 1 0 8 0 amappl6 120 307 0 291 1 0 1 1 0 8 0 amappl5 112 79 0 68 1 0 1 1 0 8 0 amappl4 104 454 0 423 1 0 1 1 0 8 0 amappl3 96 5621 0 5529 4 1 3 3 0 8 0 amappl2 88 1342 0 1265 2 0 2 2 0 8 0 amappl1 80 13759 0 13140 15 0 15 15 0 8 0 amappl 88 9111 0 8947 5 0 5 5 0 92 0 uvmvnodes 80 138 0 0 3 0 3 3 0 8 0 dma32768 32768 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 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 256 0 256 2 2 0 1 0 8 0 dma64 64 8 0 8 2 2 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 35 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1190 0 1158 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1190 0 1158 1 0 1 1 0 8 0 vmmpekpl 168 11313 0 11269 3 0 3 3 0 8 0 vmmpepl 168 85423 0 83470 114 3 111 112 0 357 19 vmsppl 488 1189 0 1158 5 0 5 5 0 8 0 rwobjpl 80 26655 0 25515 34 1 33 34 0 8 1 pdppl 4096 2397 0 2323 110 32 78 85 0 8 4 pvpl 32 19570 0 0 158 0 158 158 0 265 0 pmappl 256 1194 0 1160 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 337 0 49 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffffffff83915588,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 mtx_enter(ffffffff83915578) at mtx_enter+0x95 sys/kern/kern_lock.c:406 sleep_setup(ffff8000299dee80,220,ffffffff8342dee8) at sleep_setup+0xed sys/kern/kern_synch.c:304 msleep_nsec(ffff8000299dee80,ffff8000299dee20,220,ffffffff8342dee8,ffffffffffffffff) at msleep_nsec+0x10b sys/kern/kern_synch.c:217 dt_ioctl_record_stop(ffff80000159e000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,81,2000,ffff8000fffef4d8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffef4d8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000357e5d60) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807e5128b8,81,fffffd80097fd548,ffff8000fffef4d8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c7740d8,ffff8000fffef4d8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c7740d8,ffff8000fffef4d8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c7740d8,ffff8000fffef4d8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c7740d8,ffff8000fffef4d8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffef4d8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffef4d8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffef4d8,ffff8000357e60d0,ffff8000357e6020) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000357e60d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000357e60d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x797545f67900, count: -17 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 mtx_enter(ffff8000299dee20) at mtx_enter+0x377 sys/kern/kern_lock.c:454 clockintr_dispatch(ffff80002a3bbc30) at clockintr_dispatch+0x401 sys/kern/kern_clockintr.c:215 lapic_clockintr(0,0) at lapic_clockintr+0x51 sys/arch/amd64/amd64/lapic.c:482 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff838b91c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838b91c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff838b91c0,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369 biowait(fffffd806cf1d148) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd806cf1d148) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ufs_dirremove(fffffd807a89d7d8,fffffd807a7119a8,800c,1) at ufs_dirremove+0x290 sys/ufs/ufs/ufs_lookup.c:919 ufs_rmdir(ffff80002a3bbf60) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248 VOP_RMDIR(fffffd807a89d7d8,fffffd807e512a68,ffff80002a3bc038) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413 dounlinkat(ffff8000fffee018,ffffff9c,6f88579b24c0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1901 syscall(ffff80002a3bc1b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bc1b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f88579b24b0, count: -19