witness: lock_object uninitialized: 0xffff80003242b638
Starting stack trace...
witness_checkorder(ffff80003242b638,9,0) at witness_checkorder+0x1a7 witness_debugger sys/kern/subr_witness.c:2573 [inline]
witness_checkorder(ffff80003242b638,9,0) at witness_checkorder+0x1a7 sys/kern/subr_witness.c:783
mtx_enter(ffff80003242b628) at mtx_enter+0x95 sys/kern/kern_lock.c:406
filt_procdetach(fffffd805bc46bc8) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff80002a2af240,fffffd806f674e00,fffffd806f674ea0,1a,1) at knote_remove+0x1fb sys/kern/kern_event.c:-1
kqueue_purge(ffff80002a2af240,fffffd806f674e00) at kqueue_purge+0x137 sys/kern/kern_event.c:1890
kqueue_close(fffffd80654a60e8,ffff80002a2af240) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd80654a60e8,ffff80002a2af240) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd80654a60e8,ffff80002a2af240) at closef+0x192 sys/kern/kern_descrip.c:1264
syscall(ffff80003200c1e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003200c1e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x9525bf08f90, count: 247
End of stack trace.
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(ffff80003242b638,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1
mtx_enter(ffff80003242b628) at mtx_enter+0x95 sys/kern/kern_lock.c:406
filt_procdetach(fffffd805bc46bc8) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff80002a2af240,fffffd806f674e00,fffffd806f674ea0,1a,1) at knote_remove+0x1fb sys/kern/kern_event.c:-1
kqueue_purge(ffff80002a2af240,fffffd806f674e00) at kqueue_purge+0x137 sys/kern/kern_event.c:1890
kqueue_close(fffffd80654a60e8,ffff80002a2af240) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd80654a60e8,ffff80002a2af240) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd80654a60e8,ffff80002a2af240) at closef+0x192 sys/kern/kern_descrip.c:1264
syscall(ffff80003200c1e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003200c1e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x9525bf08f90, count: -11
ddb{0}> show registers
rdi 0
rsi 0x80000 acpi_pdirpa+0x6be71
rbp 0xffff80003200bdb0
rbx 0
rdx 0xffff80000158c500
rcx 0xffff80002a2af240
rax 0x7ffff acpi_pdirpa+0x6be70
r8 0xffff80003200bd50
r9 0x8080808080808080
r10 0xffff80003200bca0
r11 0x507adb6e2dc628a1
r12 0xffff80003242b6fe
r13 0x9
r14 0xffff80003242b638
r15 0x3
rip 0xffffffff82a953f5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003200bda0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=78495 pid=68273 tcnt=4 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=86, usrpri=86, slppri=36, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a2ae018,0xffff80002a2af780
process=0xffff80003201c028 user=0xffff800032007000, vmspace=0xfffffd806c97bd70
estcpu=36, cpticks=12, pctcpu=0.0, user=0, sys=12, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
14817 199597 14292 0 2 0 syz-executor
14817 197393 14292 0 3 0x4000080 fsleep syz-executor
42518 205365 51293 0 2 0 syz-executor
42518 41249 51293 0 3 0x4000080 fsleep syz-executor
55953 103925 5519 0 2 0 syz-executor
55953 75255 5519 0 3 0x4000080 fsleep syz-executor
55953 119907 5519 0 3 0x4000080 fsleep syz-executor
55953 336714 5519 0 3 0x4000080 fsleep syz-executor
67925 301524 57294 0 2 0 syz-executor
67925 439881 57294 0 3 0x4000080 kqsel syz-executor
67925 247014 57294 0 3 0x4000080 fsleep syz-executor
67925 244348 57294 0 3 0x4000080 fsleep syz-executor
82473 239585 97606 0 2 0 syz-executor
82473 158557 97606 0 2 0x4000000 syz-executor
82473 121047 97606 0 3 0x4000080 fsleep syz-executor
82473 465271 97606 0 3 0x4000080 fsleep syz-executor
82473 198263 97606 0 2 0x4000000 syz-executor
27186 41881 15471 -1 4 0x82010 syz-executor
27186 521974 15471 -1 4 0x4082010 syz-executor
27186 214460 15471 -1 4 0x4082010 syz-executor
27186 500201 15471 -1 3 0x4002010 suspend syz-executor
27186 253910 15471 -1 2 0x4082010 syz-executor
13714 319120 83591 0 2 0x100002 sh
68273 251390 26320 0 2 0xc80 syz-executor
68273 523586 26320 0 3 0x4000080 fsleep syz-executor
68273 518126 26320 0 3 0x4000080 fsleep syz-executor
*68273 78495 26320 0 7 0x4000000 syz-executor
83591 451999 63336 0 3 0x82 wait syz-executor
65476 19274 0 0 3 0x14200 acct acct
57294 443274 63336 0 2 0xc82 syz-executor
26320 86951 63336 0 2 0xc82 syz-executor
5519 192870 63336 0 2 0xc82 syz-executor
97606 127256 63336 0 2 0xc82 syz-executor
15471 216098 63336 0 2 0xc82 syz-executor
65147 433141 1 0 3 0x100083 ttyopn getty
14292 315580 63336 0 2 0xc82 syz-executor
51293 411273 63336 0 2 0xc82 syz-executor
63336 405154 8780 0 3 0x82 kqread syz-executor
8780 301556 57691 0 3 0x10008a sigsusp ksh
57691 188727 80761 0 3 0x98 kqread sshd-session
80761 68896 57711 0 3 0x92 kqread sshd-session
57711 344413 1 0 3 0x88 kqread sshd
87087 13730 83755 74 3 0x1100092 bpf pflogd
83755 231293 1 0 3 0x80 sbwait pflogd
67243 434629 12888 73 2 0x1100090 syslogd
12888 507739 1 0 3 0x100082 sbwait syslogd
24275 306586 1 0 3 0x100080 kqread resolvd
97490 401066 16724 77 3 0x100092 kqread dhcpleased
26944 516965 16724 77 3 0x100092 kqread dhcpleased
16724 437304 1 0 3 0x80 kqread dhcpleased
44942 424633 0 0 3 0x14200 bored smr
10414 179178 0 0 2 0x14200 zerothread
80449 335410 0 0 3 0x14200 aiodoned aiodoned
28342 371530 0 0 3 0x14200 syncer update
22674 104692 0 0 3 0x14200 cleaner cleaner
22131 343368 0 0 3 0x14200 reaper reaper
72736 407452 0 0 3 0x14200 pgdaemon pagedaemon
98122 289267 0 0 3 0x14200 bored viomb
74472 252276 0 0 3 0x40014200 acpi0 acpi0
4530 100141 0 0 7 0x40014200 idle1
15304 237584 0 0 3 0x14200 bored softnet1
99933 75726 0 0 2 0x14200 softnet0
47179 22176 0 0 3 0x14200 bored systqmp
72880 511869 0 0 3 0x14200 bored systq
14778 97470 0 0 2 0x14200 softclockmp
90496 168687 0 0 3 0x40014200 tmoslp softclock
86429 179978 0 0 3 0x40014200 idle0
1 440164 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 14817 (syz-executor) thread 0xffff80002a2af4d8 (199597)
exclusive rwlock vmmaplk r = 0 (0xfffffd800b063c70)
#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_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
#7 recall_trap+0x8
Process 42518 (syz-executor) thread 0xffff80002a2af770 (205365)
exclusive rwlock vmmaplk r = 0 (0xfffffd806eaae110)
#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_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
#7 recall_trap+0x8
Process 82473 (syz-executor) thread 0xffff80002a366aa8 (158557)
exclusive rrwlock inode r = 0 (0xfffffd8062e730f0)
#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 68273 (syz-executor) thread 0xffff80002a2af240 (78495)
exclusive rwlock kqpsl r = 0 (0xffffffff838a9910)
#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 filt_procdetach+0x35 sys/kern/kern_event.c:431
#3 knote_remove+0x1fb sys/kern/kern_event.c:-1
#4 kqueue_purge+0x137 sys/kern/kern_event.c:1890
#5 kqueue_close+0x48 sys/kern/kern_event.c:1934
#6 fdrop+0x121 sys/kern/kern_descrip.c:1280
#7 closef+0x192 sys/kern/kern_descrip.c:1264
#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
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11099 12123K 14071K 166960K 15159 0
pcb 17 16K 20K 166960K 1061 0
rtable 226 14K 15K 166960K 913 0
pf 47 20K 22K 166960K 402 0
ifaddr 38 7K 9K 166960K 261 0
ifgroup 67 2K 3K 166960K 494 0
sysctl 4 1K 9K 166960K 27 0
counters 76 37K 39K 166960K 512 0
ioctlops 0 0K 4K 166960K 2243 0
iov 0 0K 24K 166960K 465 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1503 94K 96K 166960K 3860 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 50 0
VM map 2 1K 1K 166960K 2 0
sem 15 0K 1K 166960K 108 0
dirhash 12 2K 3K 166960K 78 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 240K 166960K 3241 0
sigio 0 0K 0K 166960K 45 0
proc 77 131K 164K 166960K 1090 0
subproc 72 4K 4K 166960K 162 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 371 0
in_multi 65 5K 7K 166960K 348 0
ether_multi 1 0K 0K 166960K 39 0
mrt 1 0K 0K 166960K 30 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 145 652K 652K 166960K 145 0
exec 0 0K 1K 166960K 1015 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 7 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 276 168K 183K 166960K 31295 0
UVM aobj 25 28K 28K 166960K 34 0
pinsyscall 43 86K 111K 166960K 4599 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 274 0
NDP 15 0K 2K 166960K 198 0
temp 83 8684K 8940K 166960K 158980 0
kqueue 14 20K 39K 166960K 662 0
SYN cache 2 8K 16K 166960K 3 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 120 374 0 371 5 4 1 3 0 8 0
rtentry 176 274 0 196 7 2 5 6 0 8 0
unpcb 144 2252 0 2234 22 21 1 6 0 8 0
syncache 336 22 0 22 8 8 0 1 0 8 0
tcpqe 32 3 0 3 2 2 0 1 0 8 0
tcpcb 736 1110 0 1102 35 34 1 7 0 8 0
arp 136 38 0 22 1 0 1 1 0 8 0
inpcb 328 4080 0 4069 44 43 1 12 0 8 0
nd6 152 57 0 42 2 1 1 2 0 8 0
pkpcb 40 25 0 25 7 7 0 1 0 8 0
kcovpl 48 18 0 10 1 0 1 1 0 8 0
ppxss 1192 165 0 165 4 4 0 1 0 8 0
pppxif 1504 28 0 28 8 8 0 1 0 8 0
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 26 0 21 1 0 1 1 0 482 0
pffrnode 88 23 0 19 1 0 1 1 0 8 0
pffrent 40 49 0 44 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 6 0 4 1 0 1 1 0 8 0
pfanchor 1288 2 0 0 1 0 1 1 0 8 0
pftag 88 2 0 2 1 1 0 1 0 8 0
pfstitem 24 4 0 0 1 0 1 1 0 8 0
pfstkey 128 7 0 4 1 0 1 1 0 8 0
pfstate 448 5 0 3 1 0 1 1 0 8 0
pfrule 1360 10 0 7 1 0 1 1 0 8 0
rttmr 136 8 0 8 6 6 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 1345 0 1030 42 21 21 31 0 8 0
art_table 40 1348 0 1030 5 0 5 5 0 8 0
art_node 32 272 0 202 1 0 1 1 0 8 0
sysvmsgpl 40 18 0 11 1 0 1 1 0 8 0
semupl 112 5 0 5 5 5 0 1 0 8 0
semapl 112 99 0 86 1 0 1 1 0 8 0
shmpl 112 11 0 2 1 0 1 1 0 8 0
dirhash 1024 61 0 44 3 0 3 3 0 8 0
dino2pl 256 7675 0 6145 96 0 96 96 0 8 0
ffsino 296 7675 0 6145 119 0 119 119 0 8 0
nchpl 144 11981 0 10250 65 0 65 65 0 8 0
rtmask 32 29 0 29 7 7 0 1 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 43661 0 43661 8 8 0 4 0 8 0
percpumem 16 271 0 218 1 0 1 1 0 8 0
vcpupl 3968 14 0 1 2 0 2 2 0 8 0
vmpool 848 20 0 7 2 0 2 2 0 8 0
pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0
kstatmem 264 328 0 292 4 1 3 4 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 13 0 13 7 7 0 1 0 8 0
scxspl 216 82496 0 82496 17 16 1 8 1 8 1
plimitpl 152 769 0 751 1 0 1 1 0 8 0
sigapl 424 3504 0 3455 9 3 6 8 0 8 0
knotepl 120 1009 0 0 31 0 31 31 0 8 0
kqueuepl 224 1404 0 1393 16 15 1 5 0 8 0
pipepl 344 588 0 561 17 14 3 9 0 8 0
fdescpl 528 3450 0 3418 3 0 3 3 0 8 0
filepl 160 25105 0 24876 38 26 12 19 0 8 0
lockfpl 104 1287 0 1284 2 1 1 2 0 8 0
lockfspl 48 420 0 417 1 0 1 1 0 8 0
sessionpl 144 47 0 38 1 0 1 1 0 8 0
pgrppl 48 95 0 78 1 0 1 1 0 8 0
ucredpl 104 4293 0 4278 1 0 1 1 0 8 0
zombiepl 144 4054 0 4054 1 1 0 1 0 8 0
processpl 1232 3504 0 3455 7 3 4 6 0 8 0
procpl 664 8845 0 8777 10 3 7 8 0 8 0
sosppl 176 30 0 30 5 5 0 1 0 8 0
sockpl 752 6865 0 6833 70 65 5 18 0 8 0
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 6 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 142 0 0 18 0 18 18 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 75 0 0 7 1 6 7 0 8 0
mtagpl 96 72 0 0 2 0 2 2 0 8 0
mbufpl 256 1327 0 0 81 0 81 81 0 8 0
bufpl 280 33267 0 27131 439 0 439 439 0 8 0
anonpl 32 14372 0 0 116 0 116 116 0 246 0
amapchunkpl 152 107517 0 106897 64 39 25 34 0 158 0
amappl16 200 11734 0 11696 74 65 9 32 0 8 0
amappl15 192 31 0 31 3 3 0 1 0 8 0
amappl14 184 2 0 2 1 1 0 1 0 8 0
amappl13 176 539 0 536 1 0 1 1 0 8 0
amappl12 168 3909 0 3866 3 0 3 3 0 8 0
amappl11 160 23 0 23 2 2 0 1 0 8 0
amappl10 152 48 0 33 1 0 1 1 0 8 0
amappl9 144 260 0 259 2 1 1 1 0 8 0
amappl8 136 26 0 23 1 0 1 1 0 8 0
amappl7 128 134 0 131 1 0 1 1 0 8 0
amappl6 120 406 0 390 1 0 1 1 0 8 0
amappl5 112 91 0 80 1 0 1 1 0 8 0
amappl4 104 541 0 510 1 0 1 1 0 8 0
amappl3 96 19071 0 18961 3 0 3 3 0 8 0
amappl2 88 3646 0 3569 2 0 2 2 0 8 0
amappl1 80 25427 0 24830 15 1 14 15 0 8 0
amappl 88 29767 0 29574 5 0 5 5 0 92 0
uvmvnodes 80 214 0 0 5 0 5 5 0 8 0
dma65536 65536 2 0 2 1 1 0 1 0 8 0
dma16384 16384 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
dma512 512 1 0 1 1 1 0 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 259 0 259 5 5 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 19 0 18 1 0 1 1 0 8 0
aobjpl 72 33 0 9 1 0 1 1 0 8 0
uaddrrnd 24 3450 0 3418 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 3450 0 3418 1 0 1 1 0 8 0
vmmpekpl 168 28570 0 28500 4 0 4 4 0 8 0
vmmpepl 168 224769 0 222765 144 50 94 113 0 357 0
vmsppl 488 3449 0 3418 5 0 5 5 0 8 0
rwobjpl 80 60091 0 58860 41 7 34 36 0 8 0
pdppl 4096 6947 0 6863 158 74 84 87 0 8 0
pvpl 32 22590 0 0 182 0 182 182 0 265 0
pmappl 256 3469 0 3425 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 474 0 152 10 0 10 10 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(ffff80003242b638,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1
mtx_enter(ffff80003242b628) at mtx_enter+0x95 sys/kern/kern_lock.c:406
filt_procdetach(fffffd805bc46bc8) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff80002a2af240,fffffd806f674e00,fffffd806f674ea0,1a,1) at knote_remove+0x1fb sys/kern/kern_event.c:-1
kqueue_purge(ffff80002a2af240,fffffd806f674e00) at kqueue_purge+0x137 sys/kern/kern_event.c:1890
kqueue_close(fffffd80654a60e8,ffff80002a2af240) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd80654a60e8,ffff80002a2af240) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd80654a60e8,ffff80002a2af240) at closef+0x192 sys/kern/kern_descrip.c:1264
syscall(ffff80003200c1e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003200c1e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x9525bf08f90, count: -11
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
acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224
sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191
end trace frame: 0x0, count: -5