kernel: protection fault trap, code=0
Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
witness_checkorder(deadbeefdeadc017,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779
mtx_enter(deadbeefdeadc007) at mtx_enter+0x4a sys/kern/kern_lock.c:260
prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff8000ffffc2a0) at reaper+0x2cc sys/kern/kern_exit.c:516
end trace frame: 0x0, count: -4
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80002a2686f0
rbx 0
rdx 0
rcx 0xffff8000ffffc2a0
rax 0xffffffff837c7ffe cpu_info_full_primary+0x1ffe
r8 0x3b9aca00
r9 0
r10 0x455335b8742cbede
r11 0x5027f30aac43c5f4
r12 0xdeadbeefdeadbefe
r13 0x9
r14 0xdeadbeefdeadc017
r15 0
rip 0xffffffff820d60b5 witness_checkorder+0xb5
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a268650
ss 0x10
witness_checkorder+0xb5: movl 0x20(%r14),%r15d
ddb{0}> show proc
PROC (reaper) tid=283063 pid=64631 tcnt=1 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
runpri=32, usrpri=51, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000ffffc7d0,0xffff8000ffffc018
process=0xffff8000ffff4008 user=0xffff80002a263000, vmspace=0xffffffff8397a928
estcpu=1, cpticks=7, pctcpu=0.1, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
90879 213651 9525 32767 2 0x10 syz-executor
90879 50598 9525 32767 2 0x4000010 syz-executor
65270 88606 45667 32767 2 0x10 syz-executor
65270 166204 45667 32767 3 0x4000090 fsleep syz-executor
2208 14715 0 0 3 0x14200 bored sosplice
31362 386198 31508 32767 2 0x90 syz-executor
45667 350350 48007 32767 3 0x90 nanoslp syz-executor
9525 167838 18192 32767 3 0x90 nanoslp syz-executor
19086 222876 8939 32767 2 0x90 syz-executor
28937 316488 31505 32767 2 0x10 syz-executor
96551 333059 59195 32767 3 0x90 nanoslp syz-executor
62870 44835 51840 32767 2 0x10 syz-executor
6620 262995 35824 32767 2 0x10 syz-executor
18192 317275 45385 0 3 0x82 wait syz-executor
8939 288115 45385 0 3 0x82 wait syz-executor
48007 389427 45385 0 3 0x82 wait syz-executor
31508 400310 45385 0 3 0x82 wait syz-executor
31505 298010 45385 0 3 0x82 wait syz-executor
51840 357269 45385 0 3 0x82 wait syz-executor
59195 349373 45385 0 3 0x82 wait syz-executor
35824 88332 45385 0 3 0x82 wait syz-executor
45385 226359 90188 0 3 0x82 kqread syz-executor
90188 278785 59913 0 3 0x10008a sigsusp ksh
59913 400893 86337 0 3 0x98 kqread sshd-session
86337 294492 19501 0 3 0x92 kqread sshd-session
66020 23668 1 0 3 0x100083 ttyin getty
19501 464924 1 0 3 0x88 kqread sshd
59102 15680 81760 73 3 0x1100090 kqread syslogd
81760 371939 1 0 3 0x100082 sbwait syslogd
55434 456354 1 0 3 0x100080 kqread resolvd
86600 129217 38703 77 3 0x100092 kqread dhcpleased
58563 480653 38703 77 3 0x100092 kqread dhcpleased
38703 486896 1 0 3 0x80 kqread dhcpleased
54451 26211 0 0 3 0x14200 bored smr
17017 144480 0 0 2 0x14200 zerothread
2996 376832 0 0 3 0x14200 aiodoned aiodoned
84688 136002 0 0 3 0x14200 syncer update
70054 442364 0 0 3 0x14200 cleaner cleaner
*64631 283063 0 0 7 0x14200 reaper
42 454890 0 0 3 0x14200 pgdaemon pagedaemon
17389 516196 0 0 3 0x14200 bored viomb
49713 200260 0 0 3 0x40014200 acpi0 acpi0
10185 497910 0 0 3 0x40014200 idle1
76447 68120 0 0 3 0x14200 bored softnet7
27714 131692 0 0 3 0x14200 bored softnet6
55235 350108 0 0 3 0x14200 bored softnet5
28468 111092 0 0 3 0x14200 bored softnet4
81470 143441 0 0 3 0x14200 bored softnet3
66888 171280 0 0 3 0x14200 bored softnet2
79399 195167 0 0 3 0x14200 bored softnet1
51835 26816 0 0 2 0x14200 softnet0
10350 512821 0 0 3 0x14200 bored systqmp
63088 389218 0 0 3 0x14200 bored systq
56138 2932 0 0 3 0x14200 tmoslp softclockmp
76376 430898 0 0 2 0x40014200 softclock
26341 503317 0 0 3 0x40014200 idle0
1 396725 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 28937 (syz-executor) thread 0xffff80002a2e54e0 (316488)
exclusive rrwlock inode r = 0 (0xfffffd806ba51450)
#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:693
#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:748
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806d300a08)
#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 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:748
#9 Xsyscall+0x128
Process 62870 (syz-executor) thread 0xffff8000ffff2a70 (44835)
exclusive rrwlock inode r = 0 (0xfffffd806ba510d8)
#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:693
#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:748
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806ba480e0)
#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:693
#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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868
#12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
#13 Xsyscall+0x128
Process 6620 (syz-executor) thread 0xffff8000ffff3238 (262995)
exclusive rrwlock inode r = 0 (0xfffffd806ba518f0)
#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:693
#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:748
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806d300d80)
#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 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:748
#9 Xsyscall+0x128
Process 64631 (reaper) thread 0xffff8000ffffc2a0 (283063)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83949718)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
#2 sleep_finish+0x2d8 sys/kern/kern_synch.c:367
#3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298
#4 knote_processexit+0x2b sys/kern/kern_event.c:2217
#5 reaper+0x24d sys/kern/kern_exit.c:513
#6 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10221 10960K 10968K 166960K 11301 0
pcb 17 12K 12K 166960K 17 0
rtable 211 6K 6K 166960K 270 0
pf 31 16K 16K 166960K 31 0
ifaddr 42 7K 7K 166960K 44 0
ifgroup 50 2K 2K 166960K 50 0
sysctl 2 1K 9K 166960K 6 0
counters 68 36K 36K 166960K 68 0
ioctlops 0 0K 2K 166960K 37 0
iov 0 0K 2K 166960K 8 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1334 84K 84K 166960K 1365 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 9 0K 0K 166960K 76 0
dirhash 12 2K 2K 166960K 21 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 20 73K 121K 166960K 273 0
sigio 0 0K 0K 166960K 6 0
proc 58 99K 147K 166960K 510 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 109 0
ether_multi 1 0K 0K 166960K 3 0
mrt 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 229 1023K 1023K 166960K 229 0
exec 0 0K 1K 166960K 355 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 201 158K 178K 166960K 3937 0
UVM aobj 9 2K 2K 166960K 9 0
pinsyscall 41 82K 108K 166960K 1285 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 13 0
NDP 11 0K 2K 166960K 27 0
temp 38 8642K 8706K 166960K 4226 0
kqueue 14 20K 24K 166960K 53 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 59 0 55 1 0 1 1 0 8 0
rtentry 176 99 0 2 5 0 5 5 0 8 0
unpcb 144 155 0 131 2 0 2 2 0 8 1
syncache 336 5 0 5 1 0 1 1 0 8 1
tcpqe 32 1 0 1 1 0 1 1 0 8 1
tcpcb 736 134 0 129 7 0 7 7 0 8 6
arp 128 10 0 0 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 1 0 0 1 0 1 1 0 8 0
inpcb 328 316 0 307 7 0 7 7 0 8 5
ip6q 72 1 0 0 1 0 1 1 0 8 0
ip6af 40 1 0 0 1 0 1 1 0 8 0
nd6 144 20 0 1 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 443 0 3 28 0 28 28 0 8 0
art_table 40 444 0 3 5 0 5 5 0 8 0
art_node 32 99 0 12 1 0 1 1 0 8 0
sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 112 73 0 66 1 0 1 1 0 8 0
shmpl 112 6 0 0 1 0 1 1 0 8 0
dirhash 1024 23 0 6 3 0 3 3 0 8 0
dino2pl 256 1739 0 234 95 0 95 95 0 8 0
ffsino 296 1739 0 234 117 0 117 117 0 8 0
nchpl 144 2117 0 447 63 0 63 63 0 8 0
uvmvnodes 80 1820 0 0 38 0 38 38 0 8 0
vnodes 216 1820 0 0 102 0 102 102 0 8 0
namei 1024 6504 0 6504 1 0 1 1 0 8 1
percpumem 16 49 0 0 1 0 1 1 0 8 0
kstatmem 264 24 0 0 2 0 2 2 0 8 0
scxspl 216 7649 0 7649 7 1 6 6 1 8 6
plimitpl 152 94 0 70 2 0 2 2 0 8 1
sigapl 424 553 0 497 8 0 8 8 0 8 1
knotepl 120 323 0 0 10 0 10 10 0 8 0
kqueuepl 224 71 0 60 2 0 2 2 0 8 1
pipepl 344 115 0 88 3 0 3 3 0 8 0
fdescpl 528 530 0 498 3 0 3 3 0 8 0
filepl 160 2462 0 2243 13 0 13 13 0 8 3
lockfpl 104 148 0 146 1 0 1 1 0 8 0
lockfspl 48 14 0 12 1 0 1 1 0 8 0
sessionpl 144 23 0 7 1 0 1 1 0 8 0
pgrppl 48 35 0 11 1 0 1 1 0 8 0
ucredpl 104 391 0 372 1 0 1 1 0 8 0
zombiepl 144 498 0 497 1 0 1 1 0 8 0
processpl 1248 553 0 497 7 1 6 6 0 8 0
procpl 664 781 0 722 7 0 7 7 0 8 0
sosppl 168 4 0 4 1 0 1 1 0 8 1
sockpl 752 532 0 495 11 0 11 11 0 8 6
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 117 0 0 15 0 15 15 0 8 0
mcl2k 2048 19 0 0 3 0 3 3 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 244 0 0 16 0 16 16 0 8 0
bufpl 280 3036 0 116 209 0 209 209 0 8 0
anonpl 32 7657 0 0 62 0 62 62 0 246 0
amapchunkpl 152 11725 0 11326 38 3 35 35 0 158 13
amappl16 200 954 0 937 15 1 14 14 0 8 11
amappl15 192 3 0 3 1 1 0 1 0 8 0
amappl14 184 103 0 93 1 0 1 1 0 8 0
amappl13 176 1 0 1 1 1 0 1 0 8 0
amappl12 168 1131 0 1099 2 0 2 2 0 8 0
amappl11 160 43 0 33 1 0 1 1 0 8 0
amappl10 152 3 0 3 2 1 1 1 0 8 1
amappl9 144 271 0 271 1 1 0 1 0 8 0
amappl8 136 23 0 22 1 0 1 1 0 8 0
amappl7 128 104 0 94 1 0 1 1 0 8 0
amappl6 120 192 0 188 1 0 1 1 0 8 0
amappl5 112 113 0 107 1 0 1 1 0 8 0
amappl4 104 263 0 248 1 0 1 1 0 8 0
amappl3 96 2091 0 1995 4 0 4 4 0 8 0
amappl2 88 608 0 552 2 0 2 2 0 8 0
amappl1 80 8777 0 8215 14 0 14 14 0 8 0
amappl 88 3284 0 3147 5 0 5 5 0 92 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 8 0 0 1 0 1 1 0 8 0
uaddrrnd 24 530 0 498 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 530 0 498 1 0 1 1 0 8 0
vmmpekpl 168 5889 0 5850 2 0 2 2 0 8 0
vmmpepl 168 39022 0 37198 104 0 104 104 0 357 2
vmsppl 488 529 0 497 7 1 6 6 0 8 1
rwobjpl 80 14372 0 11757 60 0 60 60 0 8 1
pdppl 4096 1068 0 994 112 28 84 96 0 8 10
pvpl 32 15602 0 0 126 0 126 126 0 265 0
pmappl 256 529 0 497 4 1 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 291 0 31 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
witness_checkorder(deadbeefdeadc017,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779
mtx_enter(deadbeefdeadc007) at mtx_enter+0x4a sys/kern/kern_lock.c:260
prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff8000ffffc2a0) at reaper+0x2cc sys/kern/kern_exit.c:516
end trace frame: 0x0, count: -4
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff8000299edff0) 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(ffffffff83949510) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83949510) at __mp_lock+0x192 sys/kern/kern_lock.c:165
exit1(ffff80003c4402c0,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260
sys_exit(ffff80003c4402c0,ffff80003c499ad0,ffff80003c499a20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c499ad0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c499ad0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f01e95713f0, count: -8