witness: lock order reversal: 1st 0xffffffff839b50c8 &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 intr_user_exit+0x3c 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(ffff800030fd2f00) at ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] ast(ffff800030fd2f00) at ast+0x15a sys/arch/amd64/amd64/trap.c:739 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x721dea0b56f0, count: -7 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800030fd2d00 rbx 0 rdx 0 rcx 0xffff8000fffeba10 rax 0xffff8000299ddff0 r8 0xffff800030fd2be0 r9 0x8080808080808080 r10 0x3457f5375c6b3cc1 r11 0x94cbf9fade3165fd r12 0xfffffd8003f4d300 r13 0xfffffd800473dd58 r14 0x3 r15 0xffffffff8341fb07 substchar+0x8ae5 rip 0xffffffff825bde75 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800030fd2cf0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=381913 pid=65658 tcnt=2 stat=run flags process=4000000 proc=0 runpri=66, usrpri=66, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0x0, list=0xffff8000ffff2018,0xffff8000fffeb788 process=0xffff80003c411360 user=0xffff800030fcd000, vmspace=0xfffffd806ca34b90 estcpu=16, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34923 255899 20243 0 7 0 syz-executor 34923 464185 20243 0 3 0x4000080 fsleep syz-executor 55268 70213 24881 0 2 0 syz-executor 55268 501956 24881 0 2 0x4000000 syz-executor *65658 381913 41070 0 2 0x4000000 syz-executor 65658 5294 41070 0 2 0x4000000 syz-executor 43594 398268 22428 0 3 0x80 nanoslp syz-executor 43594 135841 22428 0 3 0x4000000 smrbar syz-executor 88962 86451 52385 0 3 0x80 nanoslp syz-executor 88962 93382 52385 0 3 0x4000080 sbwait syz-executor 88962 229589 52385 0 3 0x4000080 fsleep syz-executor 41070 335347 86409 0 3 0x82 nanoslp syz-executor 20486 200551 86409 0 3 0x82 nanoslp syz-executor 11298 398500 86409 0 2 0x2 syz-executor 22428 135772 86409 0 3 0x82 nanoslp syz-executor 42584 122114 86409 0 3 0x82 nanoslp syz-executor 24881 53196 86409 0 3 0x82 nanoslp syz-executor 52385 485162 86409 0 3 0x82 nanoslp syz-executor 20243 123923 86409 0 3 0x82 nanoslp syz-executor 86409 510298 69338 0 3 0x82 kqread syz-executor 69338 19333 69325 0 3 0x10008a sigsusp ksh 69325 304593 1488 0 3 0x98 kqread sshd-session 1488 355674 22558 0 3 0x92 kqread sshd-session 17867 175056 1 0 3 0x100083 ttyopn getty 22558 386786 1 0 3 0x88 kqread sshd 2684 298038 23480 74 3 0x1100092 bpf pflogd 23480 380637 1 0 3 0x80 sbwait pflogd 19255 429241 9489 73 3 0x1100090 kqread syslogd 9489 5242 1 0 3 0x100082 sbwait syslogd 99829 3149 1 0 3 0x100080 kqread resolvd 94741 406096 47847 77 3 0x100092 kqread dhcpleased 86910 502047 47847 77 3 0x100092 kqread dhcpleased 47847 183191 1 0 3 0x80 kqread dhcpleased 16206 349361 0 0 3 0x14200 bored smr 40565 17305 0 0 2 0x14200 zerothread 69459 355600 0 0 3 0x14200 aiodoned aiodoned 40563 233961 0 0 3 0x14200 syncer update 84617 437497 0 0 3 0x14200 cleaner cleaner 98253 431983 0 0 3 0x14200 reaper reaper 33490 153611 0 0 3 0x14200 pgdaemon pagedaemon 57155 490619 0 0 3 0x14200 bored viomb 58547 500768 0 0 3 0x40014200 acpi0 acpi0 2432 267220 0 0 3 0x40014200 idle1 42232 331564 0 0 3 0x14200 bored softnet1 32681 244235 0 0 3 0x14200 bored softnet0 83162 321488 0 0 3 0x14200 smrbar systqmp 58035 431275 0 0 3 0x14200 bored systq 49768 515589 0 0 3 0x14200 tmoslp softclockmp 92972 63541 0 0 3 0x40014200 tmoslp softclock 23304 314593 0 0 3 0x40014200 idle0 1 508521 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 (0xffffffff839b50c8) #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 intr_user_exit+0x3c Process 34923 (syz-executor) thread 0xffff8000fffead18 (255899) exclusive rwlock futexlk r = 0 (0xffffffff8399e6a8) #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 futex_wake+0xbc sys/kern/sys_futex.c:467 #3 sys_futex+0x1d9 sys/kern/sys_futex.c:158 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #5 Xsyscall+0x128 Process 43594 (syz-executor) thread 0xffff8000ffff2018 (135841) exclusive rwlock clonelk r = 0 (0xffffffff83883c68) #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 if_clone_destroy+0x93 sys/net/if.c:-1 #3 tun_dev_close+0x1d9 sys/net/if_tun.c:530 #4 spec_close+0x417 sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #6 vn_close+0xa3 sys/kern/vfs_vnops.c:292 #7 sys_ktrace+0x14e sys/kern/kern_ktrace.c:561 #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 Process 11298 (syz-executor) thread 0xffff8000ffff2fa8 (398500) exclusive rrwlock inode r = 0 (0xfffffd800f7b2c70) #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 (0xfffffd807d2ee8f0) #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 Process 83162 (systqmp) thread 0xffff8000ffffe530 (321488) shared rwlock systqmp r = 0 (0xffffffff838173a8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10199 11025K 11242K 166960K 11614 0 pcb 17 14K 16K 166960K 101 0 rtable 210 7K 7K 166960K 387 0 pf 34 17K 21K 166960K 69 0 ifaddr 39 6K 8K 166960K 57 0 ifgroup 53 2K 2K 166960K 74 0 sysctl 2 1K 9K 166960K 6 0 counters 70 37K 38K 166960K 94 0 ioctlops 0 0K 4K 166960K 1504 0 iov 0 0K 16K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1400 88K 88K 166960K 1565 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 258 0 sigio 0 0K 0K 166960K 10 0 proc 72 115K 180K 166960K 547 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 10 0 in_multi 77 5K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 1 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 399 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 252 159K 171K 166960K 4303 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 42 84K 108K 166960K 1412 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 12 0K 2K 166960K 35 0 temp 49 8668K 8732K 166960K 8434 0 kqueue 13 20K 26K 166960K 41 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 77 0 74 2 0 2 2 0 8 1 rtentry 176 122 0 28 6 0 6 6 0 8 0 unpcb 144 93 0 74 2 0 2 2 0 8 1 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 71 0 67 4 0 4 4 0 8 3 arp 136 22 0 6 1 0 1 1 0 8 0 inpcb 328 238 0 231 6 0 6 6 0 8 5 nd6 152 24 0 6 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 10 0 9 1 0 1 1 0 8 0 pppxif 1504 1 0 1 1 0 1 1 0 8 1 pffrag 232 4 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 6 0 2 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 21 0 0 1 0 1 1 0 8 0 pfstkey 128 21 0 0 1 0 1 1 0 8 0 pfstate 448 21 0 0 3 0 3 3 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 463 0 52 29 0 29 29 0 8 2 art_table 40 464 0 52 5 0 5 5 0 8 0 art_node 32 122 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1862 0 353 95 0 95 95 0 8 0 ffsino 296 1862 0 353 117 0 117 117 0 8 0 nchpl 144 2222 0 521 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 2056 0 0 115 0 115 115 0 8 0 namei 1024 7419 0 7418 2 0 2 2 0 8 1 percpumem 16 62 0 12 1 0 1 1 0 8 0 kstatmem 264 40 0 14 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 9111 0 9111 3 2 1 2 1 8 1 plimitpl 152 116 0 98 1 0 1 1 0 8 0 sigapl 424 575 0 528 7 0 7 7 0 8 1 knotepl 120 309 0 0 10 0 10 10 0 8 0 kqueuepl 224 55 0 46 1 0 1 1 0 8 0 pipepl 344 135 0 108 3 0 3 3 0 8 0 fdescpl 528 559 0 528 3 0 3 3 0 8 0 filepl 160 2676 0 2461 14 0 14 14 0 8 3 lockfpl 104 47 0 45 1 0 1 1 0 8 0 lockfspl 48 23 0 21 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 318 0 304 1 0 1 1 0 8 0 zombiepl 144 530 0 528 1 0 1 1 0 8 0 processpl 1232 575 0 528 5 0 5 5 0 8 0 procpl 664 821 0 768 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 415 0 386 9 0 9 9 0 8 5 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 179 0 0 12 0 12 12 0 8 0 bufpl 280 3663 0 127 253 0 253 253 0 8 0 anonpl 32 7525 0 0 61 0 61 61 0 246 0 amapchunkpl 152 12456 0 11925 24 0 24 24 0 158 1 amappl16 200 2324 0 2060 16 1 15 15 0 8 1 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 13 0 13 1 1 0 1 0 8 0 amappl13 176 430 0 429 1 0 1 1 0 8 0 amappl12 168 921 0 879 3 0 3 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 51 0 37 1 0 1 1 0 8 0 amappl9 144 269 0 268 1 0 1 1 0 8 0 amappl8 136 42 0 40 1 0 1 1 0 8 0 amappl7 128 100 0 97 1 0 1 1 0 8 0 amappl6 120 282 0 269 1 0 1 1 0 8 0 amappl5 112 103 0 92 1 0 1 1 0 8 0 amappl4 104 429 0 400 1 0 1 1 0 8 0 amappl3 96 2211 0 2099 5 1 4 4 0 8 0 amappl2 88 537 0 477 2 0 2 2 0 8 0 amappl1 80 9736 0 9135 15 0 15 15 0 8 2 amappl 88 3533 0 3358 5 0 5 5 0 92 0 uvmvnodes 80 103 0 0 3 0 3 3 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 128 254 0 254 2 1 1 1 0 8 1 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 559 0 528 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 559 0 528 1 0 1 1 0 8 0 vmmpekpl 168 6347 0 6312 2 0 2 2 0 8 0 vmmpepl 168 43731 0 41552 99 1 98 98 0 357 0 vmsppl 488 558 0 528 5 0 5 5 0 8 1 rwobjpl 80 15317 0 14032 27 0 27 27 0 8 0 pdppl 4096 1125 0 1056 103 30 73 87 0 8 4 pvpl 32 13964 0 0 113 0 113 113 0 265 0 pmappl 256 558 0 528 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 281 0 32 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(ffffffff8388cff0) 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(ffffffff839b50b8) at mtx_enter+0x377 sys/kern/kern_lock.c:454 futex_wake(ffff8000fffead18,c49609d1390,7fffffff,80,ffff800031be4300) at futex_wake+0x245 futex_list_wakeup sys/kern/sys_futex.c:345 [inline] futex_wake(ffff8000fffead18,c49609d1390,7fffffff,80,ffff800031be4300) at futex_wake+0x245 sys/kern/sys_futex.c:482 sys_futex(ffff8000fffead18,ffff800031be43b0,ffff800031be4300) at sys_futex+0x1d9 sys/kern/sys_futex.c:158 syscall(ffff800031be43b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031be43b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d843b842170, count: -8 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(ffff800030fd2f00) at ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] ast(ffff800030fd2f00) at ast+0x15a sys/arch/amd64/amd64/trap.c:739 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x721dea0b56f0, count: -7