login: panic: softclock: invalid to_clock: -2122283616
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*401613 43509 0 0x1000 0x4080000 0K syz-executor
119556 35807 0 0x2 0x1 1 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83320b1d) at panic+0x1e5 sys/kern/subr_prf.c:198
softclock(0) at softclock+0x2b6 sys/kern/kern_timeout.c:755
softintr_dispatch(0) at softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
ttread(ffff800000afdc00,ffff80003c5cb650,0) at ttread+0x861 sys/kern/tty.c:1589
spec_read(ffff80003c5cb440) at spec_read+0x155 sys/kern/spec_vnops.c:215
VOP_READ(fffffd80653291e0,ffff80003c5cb650,0,fffffd807f7d2068) at VOP_READ+0x102 sys/kern/vfs_vops.c:227
vn_read(fffffd807bc90690,ffff80003c5cb650,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369
dofilereadv(ffff80002a376f80,3,ffff80003c5cb650,0,ffff80003c5cb710) at dofilereadv+0x230 sys/kern/sys_generic.c:252
sys_readv(ffff80002a376f80,ffff80003c5cb7c0,ffff80003c5cb710) at sys_readv+0xd8 sys/kern/sys_generic.c:199
syscall(ffff80003c5cb7c0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c5cb7c0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf438eeb4b10, count: 2
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: softclock: invalid to_clock: -2122283616
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83320b1d) at panic+0x1e5 sys/kern/subr_prf.c:198
softclock(0) at softclock+0x2b6 sys/kern/kern_timeout.c:755
softintr_dispatch(0) at softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
ttread(ffff800000afdc00,ffff80003c5cb650,0) at ttread+0x861 sys/kern/tty.c:1589
spec_read(ffff80003c5cb440) at spec_read+0x155 sys/kern/spec_vnops.c:215
VOP_READ(fffffd80653291e0,ffff80003c5cb650,0,fffffd807f7d2068) at VOP_READ+0x102 sys/kern/vfs_vops.c:227
vn_read(fffffd807bc90690,ffff80003c5cb650,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369
dofilereadv(ffff80002a376f80,3,ffff80003c5cb650,0,ffff80003c5cb710) at dofilereadv+0x230 sys/kern/sys_generic.c:252
sys_readv(ffff80002a376f80,ffff80003c5cb7c0,ffff80003c5cb710) at sys_readv+0xd8 sys/kern/sys_generic.c:199
syscall(ffff80003c5cb7c0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c5cb7c0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf438eeb4b10, count: -13
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80003c5cb0d0
rbx 0xffffffff8379ddc7 cpu_info_full_primary+0x2dc7
rdx 0xffff8000015354c0
rcx 0xffff80002a376f80
rax 0xffffffff8379cff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x3bf8237d950b2e79
r11 0x309126dd09db51e
r12 0xffffffff8379dbc8 cpu_info_full_primary+0x2bc8
r13 0
r14 0
r15 0x1
rip 0xffffffff8279b8a5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c5cb0c0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=401613 pid=43509 tcnt=3 stat=onproc
flags process=1000<SINGLEEXIT> proc=4080000<SUSPSINGLE,THREAD>
runpri=25, usrpri=86, slppri=25, nice=20
wchan=0x0, wmesg=, ps_single=0xffff80002a3762b0 scnt=2 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a3762b0,0xffff80002a377740
process=0xffff80003c5606d0 user=0xffff80003c5c6000, vmspace=0xfffffd807eb8c000
estcpu=36, cpticks=66, pctcpu=20.45, user=0, sys=20499, intr=33
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
77444 2659 23962 0 2 0 syz-executor
77444 411313 23962 0 3 0x4000080 fsleep syz-executor
20745 474142 49846 0 2 0 syz-executor
20745 431843 49846 0 3 0x4000080 fsleep syz-executor
20745 105182 49846 0 2 0x4000000 syz-executor
19125 396322 18666 0 2 0 syz-executor
19125 487980 18666 0 3 0x4000080 fsleep syz-executor
59529 462970 53647 0 2 0x480 syz-executor
59529 347046 53647 0 3 0x4000080 sbwait syz-executor
59529 396391 53647 0 2 0x4000480 syz-executor
59529 319458 53647 0 3 0x4000080 fsleep syz-executor
82290 510754 94439 0 2 0x480 syz-executor
82290 208637 94439 0 3 0x4000080 netcon syz-executor
82290 227387 94439 0 3 0x4000080 kqsel syz-executor
82290 221553 94439 0 3 0x4000080 fsleep syz-executor
6165 243827 1 0 2 0x480 init
43509 374123 12216 0 3 0x3000 suspend syz-executor
*43509 401613 12216 0 7 0x4081000 syz-executor
43509 348226 12216 0 2 0x4081080 syz-executor
53647 97512 35807 0 2 0x482 syz-executor
23224 400729 0 0 2 0x14600 acct
11393 354559 35807 0 2 0x482 syz-executor
18666 447696 35807 0 2 0x482 syz-executor
12216 499488 35807 0 2 0x482 syz-executor
23962 294439 35807 0 2 0x482 syz-executor
49846 455692 35807 0 2 0x482 syz-executor
19194 315016 35807 0 2 0x482 syz-executor
94439 327820 35807 0 2 0x482 syz-executor
31035 12460 0 0 3 0x14200 bored sosplice
64252 422964 58244 0 3 0x100082 sbwait arp
58244 225171 1 0 3 0x10008a sigsusp sh
35807 119556 69147 0 7 0x3 syz-executor
69147 21378 55147 0 3 0x10008a sigsusp ksh
55147 118209 46052 0 3 0x98 kqread sshd-session
46052 89772 78176 0 3 0x92 kqread sshd-session
78176 511733 1 0 3 0x88 kqread sshd
64718 376531 35033 74 2 0x1100092 pflogd
35033 186005 1 0 3 0x80 sbwait pflogd
52162 50715 2002 73 2 0x1100490 syslogd
2002 66787 1 0 3 0x100082 sbwait syslogd
25154 304484 1 0 3 0x100080 kqread resolvd
38002 332396 1485 77 3 0x100092 kqread dhcpleased
45841 69779 1485 77 3 0x100092 kqread dhcpleased
1485 394138 1 0 3 0x80 kqread dhcpleased
43780 12248 0 0 3 0x14200 bored smr
87800 497248 0 0 2 0x14200 zerothread
42857 101322 0 0 3 0x14200 aiodoned aiodoned
13261 249672 0 0 2 0x14600 update
19456 301757 0 0 3 0x14200 cleaner cleaner
21517 60955 0 0 3 0x14200 reaper reaper
4471 163965 0 0 3 0x14200 pgdaemon pagedaemon
69582 153393 0 0 3 0x14200 bored viomb
35192 473666 0 0 3 0x40014200 acpi0 acpi0
76559 308114 0 0 3 0x40014200 idle1
50359 31743 0 0 3 0x14200 bored softnet3
96546 246409 0 0 3 0x14200 bored softnet2
97115 519835 0 0 3 0x14200 bored softnet1
29409 500284 0 0 2 0x14200 softnet0
20475 349223 0 0 2 0x14200 systqmp
22053 112809 0 0 2 0x14200 systq
71781 503626 0 0 2 0x14200 softclockmp
57244 460173 0 0 2 0x40014200 softclock
23940 453931 0 0 3 0x40014200 idle0
1 232134 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff838713d0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 softclock+0x3a sys/kern/kern_timeout.c:742
#4 softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90
#5 Xsoftclock+0x27
#6 ttread+0x861 sys/kern/tty.c:1589
#7 spec_read+0x155 sys/kern/spec_vnops.c:215
#8 VOP_READ+0x102 sys/kern/vfs_vops.c:227
#9 vn_read+0x17b sys/kern/vfs_vnops.c:369
#10 dofilereadv+0x230 sys/kern/sys_generic.c:252
#11 sys_readv+0xd8 sys/kern/sys_generic.c:199
#12 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#13 Xsyscall+0x128
Process 43509 (syz-executor) thread 0xffff80002a376f80 (401613)
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10236 11062K 12517K 166960K 23080 0
pcb 18 20K 22K 166960K 1783 0
rtable 177 10K 12K 166960K 1847 0
pf 36 18K 26K 166960K 613 0
ifaddr 35 7K 9K 166960K 331 0
ifgroup 53 2K 3K 166960K 573 0
sysctl 4 1K 5K 166960K 81 0
counters 64 36K 37K 166960K 478 0
ioctlops 0 0K 4K 166960K 2400 0
iov 1 2K 24K 166960K 683 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1546 97K 98K 166960K 8429 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 156K 164K 166960K 157 0
VM map 2 1K 1K 166960K 2 0
sem 21 136K 136K 166960K 152 0
dirhash 12 2K 3K 166960K 135 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 20 73K 244K 166960K 7450 0
sigio 0 0K 0K 166960K 180 0
proc 64 79K 164K 166960K 1962 0
subproc 81 5K 5K 166960K 267 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 1311 0
in_multi 60 4K 7K 166960K 599 0
ether_multi 1 0K 0K 166960K 61 0
mrt 1 0K 0K 166960K 19 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 265 1182K 1182K 166960K 265 0
exec 0 0K 1K 166960K 2067 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 4 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 250 73K 91K 166960K 72143 0
UVM aobj 19 2K 2K 166960K 21 0
pinsyscall 45 90K 106K 166960K 9091 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 410 0
NDP 13 0K 1K 166960K 253 0
temp 85 8644K 8772K 166960K 380420 0
kqueue 15 24K 32K 166960K 1289 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 24 0 0 1 0 1 1 0 8 0
rtpcb 120 957 0 952 13 12 1 5 0 8 0
rtentry 112 590 0 523 3 0 3 3 0 8 0
unpcb 144 7481 0 7461 73 69 4 8 0 8 3
syncache 336 17 0 17 11 11 0 1 0 8 0
tcpqe 32 10 0 10 6 6 0 1 0 8 0
tcpcb 808 2754 0 2747 84 80 4 14 0 8 2
arp 120 107 0 94 1 0 1 1 0 8 0
inpcb 376 9772 0 9760 143 133 10 15 0 8 8
ip6q 72 1 0 1 1 1 0 1 0 8 0
ip6af 40 3 0 3 1 1 0 1 0 8 0
nd6 136 110 0 96 1 0 1 1 0 8 0
pkpcb 40 35 0 35 15 14 1 1 0 8 1
kcovpl 48 29 0 20 1 0 1 1 0 8 0
mppekey 1024 5 0 5 4 4 0 1 0 8 0
ppxss 1168 133 0 132 19 18 1 1 0 8 0
pppxif 1472 13 0 13 7 6 1 1 0 8 1
pffrag 232 47 0 43 1 0 1 1 0 482 0
pffrnode 88 41 0 37 1 0 1 1 0 8 0
pffrent 40 80 0 76 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 2 0 0 1 0 1 1 0 8 0
pfanchor 1288 1 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 532 0 441 1 0 1 1 0 8 0
pfstkey 128 534 0 443 4 0 4 4 0 8 0
pfstate 376 533 0 442 15 3 12 13 0 8 0
pfrule 1344 115 0 42 8 1 7 7 0 8 0
rttmr 136 1 0 1 1 1 0 1 0 8 0
art_heap8 4096 22 0 17 8 3 5 6 0 8 0
art_heap4 256 2671 0 2346 57 31 26 32 0 8 0
art_table 32 2693 0 2363 5 0 5 5 0 8 0
art_node 16 571 0 515 1 0 1 1 0 8 0
sysvmsgpl 40 69 0 48 1 0 1 1 0 8 0
semupl 112 6 0 6 5 5 0 1 0 8 0
semapl 112 146 0 127 1 0 1 1 0 8 0
shmpl 112 18 0 2 1 0 1 1 0 8 0
dirhash 1024 101 0 84 3 0 3 3 0 8 0
dino2pl 256 15261 0 13705 98 0 98 98 0 8 0
ffsino 280 15261 0 13705 112 0 112 112 0 8 0
nchpl 144 25915 0 25256 65 40 25 63 0 8 0
rtmask 32 14 0 14 9 9 0 1 0 8 0
uvmvnodes 80 5928 0 0 121 0 121 121 0 8 0
vnodes 216 5928 0 0 330 0 330 330 0 8 0
namei 1024 93795 0 93795 10 9 1 3 0 8 1
percpumem 16 253 0 207 1 0 1 1 0 8 0
kstatmem 264 346 0 322 9 7 2 3 0 8 0
scsiplug 72 28 0 28 20 19 1 1 0 8 1
scxspl 216 88875 0 88875 23 22 1 8 1 8 1
plimitpl 152 2062 0 2042 1 0 1 1 0 8 0
sigapl 424 7720 0 7666 9 0 9 9 0 8 0
futexpl 64 106693 0 106687 1 0 1 1 0 8 0
knotepl 120 837 0 0 19 1 18 18 0 8 0
kqueuepl 216 2772 0 2759 29 28 1 12 0 8 0
pipepl 328 1118 0 1088 27 24 3 9 0 8 0
fdescpl 504 7652 0 7618 6 1 5 6 0 8 0
filepl 152 58339 0 58098 99 85 14 20 0 8 1
lockfpl 104 2842 0 2838 3 2 1 2 0 8 0
lockfspl 48 984 0 980 1 0 1 1 0 8 0
sessionpl 144 59 0 51 1 0 1 1 0 8 0
pgrppl 48 182 0 165 1 0 1 1 0 8 0
ucredpl 104 9951 0 9938 1 0 1 1 0 8 0
zombiepl 144 10329 0 10327 6 5 1 1 0 8 0
processpl 1168 7720 0 7666 6 0 6 6 0 8 0
procpl 656 19878 0 19812 9 1 8 8 0 8 0
srpgc 96 50 0 50 17 16 1 1 0 8 1
sosppl 168 50 0 50 17 17 0 1 0 8 0
sockpl 688 18464 0 18427 226 214 12 22 0 8 8
mcl64k 65536 9 0 0 2 0 2 2 0 8 0
mcl16k 16384 8 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 4 0 0 1 0 1 1 0 8 0
mcl8k 8192 8 0 0 1 0 1 1 0 8 0
mcl4k 4096 179 0 0 15 0 15 15 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 90 0 0 5 0 5 5 0 8 0
mtagpl 96 210 0 0 5 0 5 5 0 8 0
mbufpl 256 1560 0 0 83 0 83 83 0 8 0
bufpl 280 28167 0 22013 440 0 440 440 0 8 0
anonpl 24 872746 0 865302 212 140 72 83 0 184 0
amapchunkpl 152 236460 0 235807 102 72 30 35 0 158 1
amappl16 200 17574 0 17404 143 121 22 28 0 8 2
amappl15 192 4 0 4 1 1 0 1 0 8 0
amappl14 184 189 0 176 1 0 1 1 0 8 0
amappl13 176 13 0 13 4 4 0 1 0 8 0
amappl12 168 8634 0 8600 4 1 3 3 0 8 0
amappl11 160 49 0 35 1 0 1 1 0 8 0
amappl10 152 8 0 7 2 1 1 1 0 8 0
amappl9 144 280 0 280 1 1 0 1 0 8 0
amappl8 136 64 0 60 1 0 1 1 0 8 0
amappl7 128 184 0 171 1 0 1 1 0 8 0
amappl6 120 396 0 391 1 0 1 1 0 8 0
amappl5 112 211 0 199 1 0 1 1 0 8 0
amappl4 104 442 0 421 1 0 1 1 0 8 0
amappl3 96 50333 0 50206 4 0 4 4 0 8 0
amappl2 88 1080 0 1013 2 0 2 2 0 8 0
amappl1 80 33953 0 33380 17 1 16 16 0 8 0
amappl 88 71087 0 70892 5 0 5 5 0 92 0
dma65536 65536 1 0 1 1 1 0 1 0 8 0
dma32768 32768 2 0 2 2 2 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 3 0 3 3 3 0 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 261 0 261 8 7 1 1 0 8 1
dma64 64 7 0 7 2 2 0 1 0 8 0
dma32 32 8 0 8 2 2 0 1 0 8 0
dma16 16 22 0 21 1 0 1 1 0 8 0
aobjpl 72 20 0 2 1 0 1 1 0 8 0
uaddrrnd 24 7652 0 7618 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 7652 0 7618 1 0 1 1 0 8 0
vmmpekpl 168 54174 0 54109 4 0 4 4 0 8 0
vmmpepl 168 461385 0 459259 182 77 105 111 0 357 3
vmsppl 456 7651 0 7618 5 0 5 5 0 8 0
rwobjpl 64 115431 0 108372 132 13 119 121 0 8 0
pdppl 4096 15312 0 15236 205 129 76 88 0 8 0
pvpl 32 22275 0 0 179 0 179 179 0 265 0
pmappl 248 7651 0 7618 3 0 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 629 0 296 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
panic(ffffffff83320b1d) at panic+0x1e5 sys/kern/subr_prf.c:198
softclock(0) at softclock+0x2b6 sys/kern/kern_timeout.c:755
softintr_dispatch(0) at softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
ttread(ffff800000afdc00,ffff80003c5cb650,0) at ttread+0x861 sys/kern/tty.c:1589
spec_read(ffff80003c5cb440) at spec_read+0x155 sys/kern/spec_vnops.c:215
VOP_READ(fffffd80653291e0,ffff80003c5cb650,0,fffffd807f7d2068) at VOP_READ+0x102 sys/kern/vfs_vops.c:227
vn_read(fffffd807bc90690,ffff80003c5cb650,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369
dofilereadv(ffff80002a376f80,3,ffff80003c5cb650,0,ffff80003c5cb710) at dofilereadv+0x230 sys/kern/sys_generic.c:252
sys_readv(ffff80002a376f80,ffff80003c5cb7c0,ffff80003c5cb710) at sys_readv+0xd8 sys/kern/sys_generic.c:199
syscall(ffff80003c5cb7c0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c5cb7c0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf438eeb4b10, count: -13
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff800029a9bff0) 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(ffffffff8390b530) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff8390b530) at __mp_lock+0x192 sys/kern/kern_lock.c:144
ktrsyscall(ffff80002a372018,3,18,ffff80002a3a89e0) at ktrsyscall+0x2b3 sys/kern/kern_ktrace.c:183
syscall(ffff80002a3a89e0) at syscall+0x2e6 mi_syscall sys/sys/syscall_mi.h:154 [inline]
syscall(ffff80002a3a89e0) at syscall+0x2e6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77eb0396db50, count: 8
ddb{1}> trace
x86_ipi_db(ffff800029a9bff0) 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(ffffffff8390b530) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff8390b530) at __mp_lock+0x192 sys/kern/kern_lock.c:144
ktrsyscall(ffff80002a372018,3,18,ffff80002a3a89e0) at ktrsyscall+0x2b3 sys/kern/kern_ktrace.c:183
syscall(ffff80002a3a89e0) at syscall+0x2e6 mi_syscall sys/sys/syscall_mi.h:154 [inline]
syscall(ffff80002a3a89e0) at syscall+0x2e6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77eb0396db50, count: -7