panic: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_descrip.c", line 1218
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
3558 70829 0 0 0x4000000 1 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83370106) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b078c,ffffffff83304eb6,4c2,ffffffff833408f7) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff80003901ca88) at fdfree+0x349
exit1(ffff80003901ca88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80003901ca88,ffff800031c074f0,ffff800031c07440) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800031c074f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800031c074f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78d115056320, count: 7
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_descrip.c", line 1218
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83370106) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b078c,ffffffff83304eb6,4c2,ffffffff833408f7) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff80003901ca88) at fdfree+0x349
exit1(ffff80003901ca88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80003901ca88,ffff800031c074f0,ffff800031c07440) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800031c074f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800031c074f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78d115056320, count: -8
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800031c07230
rbx 0xffffffff83828ddf cpu_info_full_primary+0x2ddf
rdx 0
rcx 0xffff80003901ca88
rax 0xffffffff83827ff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xe004783f3e4ea8de
r11 0x7c96d7ae87a0a4d4
r12 0xffffffff83828be0 cpu_info_full_primary+0x2be0
r13 0
r14 0
r15 0x1
rip 0xffffffff811b9065 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff800031c07220
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=124912 pid=20586 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff80003901ca88 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff80003901c7f0,0xffff80003901c038
process=0xffff800039025880 user=0xffff800031c02000, vmspace=0xfffffd806b890208
estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
70829 41523 57871 0 2 0 syz-executor
70829 3558 57871 0 7 0x4000000 syz-executor
28751 59991 73795 0 2 0xc80 syz-executor
28751 502848 73795 0 3 0x4000080 sbwait syz-executor
28751 431832 73795 0 3 0x4000080 sbwait syz-executor
28751 253313 73795 0 3 0x4000080 fsleep syz-executor
50119 361125 1 0 3 0x100083 ttyin getty
49459 264018 0 0 3 0x14200 acct acct
42305 194866 0 0 3 0x14200 bored sosplice
98295 97805 50069 0 2 0x2 syz-executor
90359 485792 50069 0 2 0xc82 syz-executor
73795 437124 50069 0 2 0xc82 syz-executor
38241 186122 50069 0 2 0x2 syz-executor
13453 404661 50069 0 2 0xc82 syz-executor
95949 146688 50069 0 2 0xc82 syz-executor
57871 39511 50069 0 2 0xc82 syz-executor
47548 160991 50069 0 2 0xc82 syz-executor
50069 164297 16998 0 3 0x82 kqread syz-executor
16998 440860 40182 0 3 0x10008a sigsusp ksh
40182 251440 53748 0 3 0x98 kqread sshd-session
53748 391102 3949 0 3 0x92 kqread sshd-session
3949 417637 1 0 3 0x88 kqread sshd
80161 261551 53037 74 3 0x1100092 bpf pflogd
53037 477984 1 0 3 0x80 sbwait pflogd
49182 370374 25149 73 3 0x1100090 kqread syslogd
25149 514102 1 0 3 0x100082 sbwait syslogd
84991 285413 1 0 3 0x100080 kqread resolvd
65848 125314 80370 77 3 0x100092 kqread dhcpleased
41439 315566 80370 77 3 0x100092 kqread dhcpleased
80370 266349 1 0 3 0x80 kqread dhcpleased
80533 39575 0 0 2 0x14200 smr
11938 292890 0 0 2 0x14200 zerothread
62175 83591 0 0 3 0x14200 aiodoned aiodoned
70075 89762 0 0 3 0x14200 syncer update
61709 223055 0 0 3 0x14200 cleaner cleaner
21718 294982 0 0 3 0x14200 reaper reaper
51023 153455 0 0 3 0x14200 pgdaemon pagedaemon
63779 183696 0 0 3 0x14200 bored viomb
82629 275383 0 0 3 0x40014200 acpi0 acpi0
3119 494229 0 0 3 0x40014200 idle1
25782 413798 0 0 3 0x14200 bored softnet7
69361 9021 0 0 3 0x14200 bored softnet6
77487 73418 0 0 3 0x14200 bored softnet5
42997 8525 0 0 3 0x14200 bored softnet4
19965 98993 0 0 3 0x14200 bored softnet3
33406 500782 0 0 3 0x14200 bored softnet2
20825 182425 0 0 3 0x14200 bored softnet1
51073 395985 0 0 3 0x14200 bored softnet0
99182 375301 0 0 3 0x14200 bored systqmp
29243 141980 0 0 3 0x14200 bored systq
24711 127870 0 0 3 0x14200 tmoslp softclockmp
82780 111189 0 0 2 0x40014200 softclock
8126 41862 0 0 3 0x40014200 idle0
1 505342 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 98295 (syz-executor) thread 0xffff8000ffff3a00 (97805)
exclusive rrwlock inode r = 0 (0xfffffd806f576d80)
#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 (0xfffffd806ea5ceb8)
#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 38241 (syz-executor) thread 0xffff8000ffff2a70 (186122)
exclusive rrwlock inode r = 0 (0xfffffd806e0a4348)
#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 (0xfffffd806ced2a10)
#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
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10252 11161K 11631K 166960K 12773 0
pcb 17 14K 16K 166960K 265 0
rtable 216 10K 10K 166960K 435 0
pf 36 17K 81K 166960K 122 0
ifaddr 44 8K 8K 166960K 94 0
ifgroup 57 2K 2K 166960K 147 0
sysctl 4 1K 9K 166960K 13 0
counters 70 37K 38K 166960K 178 0
ioctlops 0 0K 4K 166960K 1840 0
iov 1 0K 28K 166960K 71 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1485 93K 94K 166960K 2363 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 17 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 35 0
dirhash 12 2K 2K 166960K 48 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 15 53K 236K 166960K 1160 0
sigio 0 0K 0K 166960K 21 0
proc 72 115K 164K 166960K 650 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 432 0
in_multi 99 7K 7K 166960K 147 0
ether_multi 1 0K 0K 166960K 14 0
mrt 2 0K 0K 166960K 11 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 223 996K 996K 166960K 223 0
exec 0 0K 1K 166960K 468 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 3 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 241 160K 174K 166960K 12255 0
UVM aobj 17 2K 2K 166960K 19 0
pinsyscall 41 82K 102K 166960K 2273 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 54 0
NDP 13 0K 2K 166960K 62 0
temp 67 8650K 8726K 166960K 30350 0
kqueue 14 22K 30K 166960K 253 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 120 180 0 177 3 2 1 3 0 8 0
rtentry 176 135 0 47 5 0 5 5 0 8 0
unpcb 144 714 0 695 5 1 4 4 0 8 3
syncache 336 5 0 5 3 3 0 1 0 8 0
tcpqe 32 1 0 1 1 1 0 1 0 8 0
tcpcb 736 525 0 519 8 4 4 7 0 8 3
arp 128 17 0 5 1 0 1 1 0 8 0
inpcb 328 1310 0 1301 7 3 4 7 0 8 2
nd6 144 20 0 1 1 0 1 1 0 8 0
pkpcb 40 8 0 8 3 2 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 47 0 46 1 0 1 1 0 8 0
pppxif 1504 6 0 6 1 0 1 1 0 8 1
pffrag 232 11 0 4 1 0 1 1 0 482 0
pffrnode 88 11 0 4 1 0 1 1 0 8 0
pffrent 40 16 0 9 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 7 0 7 2 1 1 1 0 8 1
pfstitem 24 75 0 20 1 0 1 1 0 8 0
pfstkey 128 75 0 20 2 0 2 2 0 8 0
pfstate 384 75 0 20 6 0 6 6 0 8 0
pfrule 1344 21 0 16 2 1 1 2 0 8 0
rttmr 136 3 0 3 1 0 1 1 0 8 1
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 640 0 238 31 2 29 30 0 8 2
art_table 40 643 0 238 5 0 5 5 0 8 0
art_node 32 134 0 60 1 0 1 1 0 8 0
sysvmsgpl 40 16 0 9 1 0 1 1 0 8 0
semapl 112 33 0 23 1 0 1 1 0 8 0
shmpl 112 16 0 2 1 0 1 1 0 8 0
dirhash 1024 41 0 24 3 0 3 3 0 8 0
dino2pl 256 3543 0 2030 95 0 95 95 0 8 0
ffsino 296 3543 0 2030 117 0 117 117 0 8 0
nchpl 144 5230 0 3534 64 0 64 64 0 8 0
rtmask 32 8 0 8 1 0 1 1 0 8 1
uvmvnodes 80 4220 0 0 87 0 87 87 0 8 0
vnodes 216 4220 0 0 235 0 235 235 0 8 0
namei 1024 17079 0 17079 4 3 1 2 0 8 1
percpumem 16 104 0 54 1 0 1 1 0 8 0
kstatmem 264 94 0 66 3 0 3 3 0 8 0
scsiplug 72 7 0 7 3 2 1 1 0 8 1
scxspl 216 31704 0 31704 10 6 4 8 1 8 4
plimitpl 152 370 0 352 1 0 1 1 0 8 0
sigapl 424 1467 0 1413 7 0 7 7 0 8 0
knotepl 120 753 0 0 23 0 23 23 0 8 0
kqueuepl 224 416 0 406 3 2 1 3 0 8 0
pipepl 344 195 0 168 3 0 3 3 0 8 0
fdescpl 528 1441 0 1411 3 0 3 3 0 8 0
filepl 160 8603 0 8383 16 0 16 16 0 8 5
lockfpl 104 638 0 636 2 0 2 2 0 8 1
lockfspl 48 250 0 248 1 0 1 1 0 8 0
sessionpl 144 24 0 15 1 0 1 1 0 8 0
pgrppl 48 57 0 40 1 0 1 1 0 8 0
ucredpl 104 1325 0 1311 1 0 1 1 0 8 0
zombiepl 144 1417 0 1413 1 0 1 1 0 8 0
processpl 1248 1467 0 1413 5 0 5 5 0 8 0
procpl 664 3169 0 3111 7 1 6 7 0 8 0
sosppl 168 11 0 11 1 0 1 1 0 8 1
sockpl 752 2245 0 2214 12 1 11 12 0 8 7
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 112 0 0 14 0 14 14 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 27 0 0 4 0 4 4 0 8 0
mtagpl 96 12 0 0 1 0 1 1 0 8 0
mbufpl 256 339 0 0 22 0 22 22 0 8 0
bufpl 280 13606 0 7463 440 0 440 440 0 8 0
anonpl 32 13682 0 0 111 0 111 111 0 246 0
amapchunkpl 152 41468 0 40982 34 6 28 28 0 158 3
amappl16 200 5724 0 5688 60 32 28 34 0 8 17
amappl15 192 4 0 4 1 1 0 1 0 8 0
amappl14 184 115 0 103 1 0 1 1 0 8 0
amappl13 176 7 0 7 1 1 0 1 0 8 0
amappl12 168 2127 0 2097 3 1 2 2 0 8 0
amappl11 160 49 0 35 1 0 1 1 0 8 0
amappl10 152 3 0 3 1 1 0 1 0 8 0
amappl9 144 281 0 281 1 1 0 1 0 8 0
amappl8 136 23 0 20 1 0 1 1 0 8 0
amappl7 128 132 0 119 1 0 1 1 0 8 0
amappl6 120 184 0 181 1 0 1 1 0 8 0
amappl5 112 125 0 115 1 0 1 1 0 8 0
amappl4 104 306 0 286 1 0 1 1 0 8 0
amappl3 96 8200 0 8090 4 0 4 4 0 8 0
amappl2 88 685 0 621 2 0 2 2 0 8 0
amappl1 80 12538 0 11930 14 1 13 14 0 8 0
amappl 88 11370 0 11203 5 0 5 5 0 92 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 8 0 8 2 2 0 1 0 8 0
dma128 128 257 0 257 4 3 1 1 0 8 1
dma64 64 8 0 8 3 2 1 1 0 8 1
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 20 0 19 1 0 1 1 0 8 0
aobjpl 72 18 0 2 1 0 1 1 0 8 0
uaddrrnd 24 1441 0 1411 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1441 0 1411 1 0 1 1 0 8 0
vmmpekpl 168 12416 0 12376 3 0 3 3 0 8 0
vmmpepl 168 96129 0 94159 120 9 111 117 0 357 10
vmsppl 488 1440 0 1411 5 1 4 5 0 8 0
rwobjpl 80 31208 0 26019 114 0 114 114 0 8 1
pdppl 4096 2889 0 2822 105 34 71 85 0 8 4
pvpl 32 22063 0 0 179 1 178 178 0 265 0
pmappl 256 1440 0 1411 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 304 0 49 8 0 8 8 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
panic(ffffffff83370106) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b078c,ffffffff83304eb6,4c2,ffffffff833408f7) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff80003901ca88) at fdfree+0x349
exit1(ffff80003901ca88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80003901ca88,ffff800031c074f0,ffff800031c07440) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800031c074f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800031c074f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78d115056320, count: -8
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
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(ffffffff8394fb18) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff8394fb18) at __mp_lock+0x199 sys/kern/kern_lock.c:165
sysctl_file(ffff800038815598,4,200000000100,ffff8000388155c8,ffff80003901c028) at sysctl_file+0x27ef sys/kern/kern_sysctl.c:1784
kern_sysctl(ffff800038815594,5,200000000100,ffff8000388155c8,0,37,3074a293280deebb) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:733
sys_sysctl(ffff80003901c028,ffff800038815700,ffff800038815650) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff800038815700) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800038815700) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdfff3fbe740, count: 6
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(ffffffff8394fb18) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff8394fb18) at __mp_lock+0x199 sys/kern/kern_lock.c:165
sysctl_file(ffff800038815598,4,200000000100,ffff8000388155c8,ffff80003901c028) at sysctl_file+0x27ef sys/kern/kern_sysctl.c:1784
kern_sysctl(ffff800038815594,5,200000000100,ffff8000388155c8,0,37,3074a293280deebb) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:733
sys_sysctl(ffff80003901c028,ffff800038815700,ffff800038815650) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff800038815700) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800038815700) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdfff3fbe740, count: -9