witness: lock order reversal: 1st 0xffffffff839e9d90 &sched_lock (&sched_lock) 2nd 0xffff8000299dee30 &cq->cq_mtx (&cq->cq_mtx) lock order [1] &sched_lock (&sched_lock) -> [2] &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 ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] #3 ast+0x15a sys/arch/amd64/amd64/trap.c:739 #4 Xsyscall+0x156 lock order [2] &cq->cq_mtx (&cq->cq_mtx) -> [1] &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 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffff8000299dee30,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 mtx_enter(ffff8000299dee20) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_cancel(ffff8000299de2f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 mi_switch() at mi_switch+0x187 sys/kern/sched_bsd.c:376 ast(ffff80003c42a880) at ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] ast(ffff80003c42a880) at ast+0x15a sys/arch/amd64/amd64/trap.c:739 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0xb8e37438590, count: -7 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c42a680 rbx 0 rdx 0 rcx 0xffff8000fffe2028 rax 0xffff8000299ddff0 r8 0xffff80003c42a560 r9 0x8080808080808080 r10 0x297bbd6bcf0d52c5 r11 0xc61dcf4df8d5e086 r12 0xfffffd8003f4c300 r13 0xfffffd800473cd58 r14 0x3 r15 0xffffffff8342267a substchar+0xa126 rip 0xffffffff81209f45 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c42a670 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=181949 pid=4605 tcnt=4 stat=run flags process=4000000 proc=4000000 runpri=50, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0x0, list=0xffff8000fffe2a88,0xffffffff8397b8c8 process=0xffff8000fffe49c0 user=0xffff80003c425000, vmspace=0xfffffd800b063000 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4605 156651 74415 0 7 0x4000000 syz-executor 4605 200034 74415 0 2 0x4000080 syz-executor 4605 3462 74415 0 3 0x4000080 fsleep syz-executor * 4605 181949 74415 0 2 0x4000000 syz-executor 78392 466005 33694 0 3 0x80 nanoslp syz-executor 78392 62822 33694 0 3 0x4000080 kqread syz-executor 66921 139108 49442 0 2 0 syz-executor 66921 359680 49442 0 3 0x4000000 biowait syz-executor 66921 322042 49442 0 3 0x4000000 fltagain2 syz-executor 66921 514154 49442 0 3 0x4000080 pipeiolk syz-executor 59151 469268 7804 0 2 0 syz-executor 59151 520415 7804 0 3 0x4000000 biowait syz-executor 59151 315028 7804 0 3 0x4000000 fltagain2 syz-executor 59151 376351 7804 0 3 0x4000080 pipeiolk syz-executor 96446 461890 61578 0 3 0x82 nanoslp syz-executor 67565 394178 61578 0 3 0x2 biowait syz-executor 33694 187394 61578 0 3 0x82 nanoslp syz-executor 49442 58049 61578 0 3 0x82 nanoslp syz-executor 74415 442179 61578 0 3 0x82 nanoslp syz-executor 75238 262419 61578 0 3 0x82 wait syz-executor 75936 489699 61578 0 3 0x82 nanoslp syz-executor 7804 368320 61578 0 3 0x82 nanoslp syz-executor 61578 476303 50236 0 3 0x82 kqread syz-executor 50236 510599 8703 0 3 0x10008a sigsusp ksh 8703 127556 46150 0 3 0x98 kqread sshd-session 46150 214624 7001 0 3 0x92 kqread sshd-session 19248 33992 1 0 3 0x100083 ttyin getty 7001 19343 1 0 3 0x88 kqread sshd 69280 455063 26404 74 3 0x1100092 bpf pflogd 26404 319632 1 0 3 0x80 sbwait pflogd 59338 477751 62722 73 3 0x1100090 kqread syslogd 62722 302742 1 0 3 0x100082 sbwait syslogd 38539 168744 1 0 3 0x100080 kqread resolvd 1344 212934 54621 77 3 0x100092 kqread dhcpleased 86060 2350 54621 77 3 0x100092 kqread dhcpleased 54621 485196 1 0 3 0x80 kqread dhcpleased 31252 461411 0 0 3 0x14200 bored smr 69068 377278 0 0 3 0x14200 pgzero zerothread 436 283722 0 0 3 0x14200 aiodoned aiodoned 7038 475039 0 0 3 0x14200 syncer update 1364 405221 0 0 3 0x14200 cleaner cleaner 6114 59192 0 0 3 0x14200 reaper reaper 33377 33632 0 0 3 0x14200 pgdaemon pagedaemon 28892 336138 0 0 3 0x14200 bored viomb 69580 300999 0 0 3 0x40014200 acpi0 acpi0 36675 21076 0 0 3 0x40014200 idle1 9412 67075 0 0 3 0x14200 bored softnet1 45018 168627 0 0 3 0x14200 bored softnet0 95744 147929 0 0 3 0x14200 bored systqmp 29783 233483 0 0 3 0x14200 bored systq 78003 427533 0 0 3 0x14200 tmoslp softclockmp 71929 273781 0 0 3 0x40014200 tmoslp softclock 45458 405580 0 0 3 0x40014200 idle0 1 167997 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &sched_lock r = 0 (0xffffffff839e9d90) #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 preempt+0x35 sys/kern/sched_bsd.c:338 #3 ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] #3 ast+0x15a sys/arch/amd64/amd64/trap.c:739 #4 Xsyscall+0x156 Process 4605 (syz-executor) thread 0xffff8000fffe2d20 (156651) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff838c4c48) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 #2 Xintr_ioapic_edge23_untramp+0x18f Process 66921 (syz-executor) thread 0xffff8000fffe87e8 (359680) exclusive rrwlock inode r = 0 (0xfffffd806c958a20) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 59151 (syz-executor) thread 0xffff8000fffe8a80 (520415) exclusive rrwlock inode r = 0 (0xfffffd806c958c70) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 67565 (syz-executor) thread 0xffff80002a2607e0 (394178) exclusive rrwlock inode r = 0 (0xfffffd806f24c790) #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 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:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d95a200) #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 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:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10214 11281K 11475K 166960K 11525 0 pcb 17 12K 12K 166960K 57 0 rtable 241 7K 7K 166960K 360 0 pf 35 17K 18K 166960K 60 0 ifaddr 43 7K 7K 166960K 51 0 ifgroup 55 2K 2K 166960K 66 0 sysctl 1 1K 9K 166960K 6 0 counters 70 37K 37K 166960K 82 0 ioctlops 0 0K 4K 166960K 1515 0 iov 0 0K 12K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1346 85K 85K 166960K 1484 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 110K 166960K 297 0 proc 72 115K 180K 166960K 570 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 29 0 in_multi 99 7K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 5 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 384 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 251 152K 166K 166960K 4509 0 UVM aobj 38 2K 2K 166960K 38 0 pinsyscall 42 84K 104K 166960K 1417 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 12 0K 2K 166960K 32 0 temp 44 8671K 8736K 166960K 13582 0 kqueue 14 22K 30K 166960K 57 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 47 0 44 1 0 1 1 0 8 0 rtentry 176 112 0 2 6 0 6 6 0 8 1 unpcb 144 304 0 286 6 0 6 6 0 8 5 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 39 0 35 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 186 0 178 2 0 2 2 0 8 1 nd6 152 24 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 ppxss 1192 5 0 5 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 0 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 0 1 1 0 8 1 pfstitem 24 33 0 0 1 0 1 1 0 8 0 pfstkey 128 35 0 2 2 0 2 2 0 8 0 pfstate 448 34 0 1 4 0 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 453 0 0 29 0 29 29 0 8 0 art_table 40 454 0 0 5 0 5 5 0 8 0 art_node 32 112 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 3 0 0 1 0 1 1 0 8 0 shmpl 112 35 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1845 0 329 96 0 96 96 0 8 0 ffsino 296 1845 0 329 117 0 117 117 0 8 0 nchpl 144 2261 0 562 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2006 0 0 112 0 112 112 0 8 0 namei 1024 6938 0 6937 2 0 2 2 0 8 1 percpumem 16 56 0 6 1 0 1 1 0 8 0 kstatmem 264 34 0 8 3 0 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scxspl 216 10572 0 10569 3 1 2 2 1 8 1 plimitpl 152 61 0 41 1 0 1 1 0 8 0 sigapl 424 599 0 552 7 0 7 7 0 8 1 knotepl 120 634 0 0 20 0 20 20 0 8 0 kqueuepl 224 69 0 59 1 0 1 1 0 8 0 pipepl 344 132 0 103 3 0 3 3 0 8 0 fdescpl 528 583 0 552 3 0 3 3 0 8 0 filepl 160 2605 0 2377 15 0 15 15 0 8 3 lockfpl 104 71 0 68 1 0 1 1 0 8 0 lockfspl 48 33 0 30 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 225 0 211 1 0 1 1 0 8 0 zombiepl 144 555 0 552 1 0 1 1 0 8 0 processpl 1232 599 0 552 5 0 5 5 0 8 0 procpl 664 880 0 823 6 0 6 6 0 8 0 sosppl 176 3 0 3 1 0 1 1 0 8 1 sockpl 752 541 0 512 16 0 16 16 0 8 12 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 162 0 0 11 0 11 11 0 8 0 bufpl 280 4388 0 130 305 0 305 305 0 8 0 anonpl 32 7075 0 0 58 0 58 58 0 246 0 amapchunkpl 152 14013 0 13498 28 0 28 28 0 158 3 amappl16 200 2411 0 2218 12 1 11 11 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 8 0 8 2 1 1 1 0 8 1 amappl13 176 429 0 428 1 0 1 1 0 8 0 amappl12 168 945 0 903 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 53 0 39 1 0 1 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 42 0 40 1 0 1 1 0 8 0 amappl7 128 78 0 77 1 0 1 1 0 8 0 amappl6 120 283 0 267 1 0 1 1 0 8 0 amappl5 112 88 0 78 1 0 1 1 0 8 0 amappl4 104 434 0 404 1 0 1 1 0 8 0 amappl3 96 2374 0 2260 4 0 4 4 0 8 0 amappl2 88 521 0 462 2 0 2 2 0 8 0 amappl1 80 9686 0 9100 14 0 14 14 0 8 1 amappl 88 3754 0 3581 5 0 5 5 0 92 0 uvmvnodes 80 109 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 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 37 0 0 1 0 1 1 0 8 0 uaddrrnd 24 583 0 552 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 583 0 552 1 0 1 1 0 8 0 vmmpekpl 168 6484 0 6446 2 0 2 2 0 8 0 vmmpepl 168 44749 0 42663 94 0 94 94 0 357 1 vmsppl 488 582 0 552 5 0 5 5 0 8 1 rwobjpl 80 15607 0 14367 27 1 26 26 0 8 0 pdppl 4096 1174 0 1104 98 24 74 86 0 8 4 pvpl 32 16384 0 0 134 1 133 133 0 265 0 pmappl 256 582 0 552 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 275 0 26 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff837e2ff0) 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 __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 mtx_enter(ffffffff839e9d80) at mtx_enter+0x375 sys/kern/kern_lock.c:455 wakeup_n(fffffd8062b484a0,ffffffff) at wakeup_n+0x54 sys/kern/kern_synch.c:581 sd_buf_done(fffffd80097f5798) at sd_buf_done+0x2de sys/scsi/sd.c:772 scsi_done(fffffd80097f5798) at scsi_done+0x40 sys/scsi/scsi_base.c:1496 vioscsi_vq_done(ffff8000000a4268) at vioscsi_vq_done+0xe1 sys/dev/pv/vioscsi.c:-1 intr_handler(ffff800038bdc800,ffff80000006b400) at intr_handler+0x125 sys/arch/amd64/amd64/intr.c:564 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x6f9e9584d000, count: -11 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffff8000299dee30,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 mtx_enter(ffff8000299dee20) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_cancel(ffff8000299de2f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 mi_switch() at mi_switch+0x187 sys/kern/sched_bsd.c:376 ast(ffff80003c42a880) at ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] ast(ffff80003c42a880) at ast+0x15a sys/arch/amd64/amd64/trap.c:739 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0xb8e37438590, count: -7