uvm_fault(0xfffffd807734fcc0, 0x8, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*213997 19884 0 0x12 0x1 0K sshd
witness_checkorder(fffffd80692199e0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794
rw_enter(fffffd80692199d0,1) at rw_enter+0xd5 sys/kern/kern_rwlock.c:249
rwsleep(fffffd8069219b10,fffffd80692199d0,118,ffffffff82821449,0) at rwsleep+0xd6 sys/kern/kern_synch.c:303
sosend(fffffd80692199c8,0,ffff800021209038,0,0,0) at sosend+0x76b sys/kern/uipc_socket.c:623
fifo_write(ffff800021208f80) at fifo_write+0x80 sys/miscfs/fifofs/fifo_vnops.c:279
VOP_WRITE(fffffd806fd50718,ffff800021209038,3,fffffd807f7d74e0) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000211e7d48,fffffd806fd50718,fffffd807f7d74e0,ffff800021209108,ffff8000212090e0) at ktrwriteraw+0x16c sys/kern/kern_ktrace.c:664
ktrgenio(ffff8000211e7d48,7,0,ffff800000db9f60,1126) at ktrgenio+0x272 ktrwrite2 sys/kern/kern_ktrace.c:626 [inline]
ktrgenio(ffff8000211e7d48,7,0,ffff800000db9f60,1126) at ktrgenio+0x272 sys/kern/kern_ktrace.c:258
dofilereadv(ffff8000211e7d48,7,ffff800021209278,0,ffff800021209360) at dofilereadv+0x2e7 sys/kern/sys_generic.c:263
sys_read(ffff8000211e7d48,ffff800021209310,ffff800021209360) at sys_read+0x87 sys/kern/sys_generic.c:167
syscall(ffff8000212093e0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff8000212093e0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f1c725afe30, count: 3
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: uvm_fault(0xfffffd807734fcc0, 0x8, 0, 1) -> e
ddb{0}> trace
witness_checkorder(fffffd80692199e0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794
rw_enter(fffffd80692199d0,1) at rw_enter+0xd5 sys/kern/kern_rwlock.c:249
rwsleep(fffffd8069219b10,fffffd80692199d0,118,ffffffff82821449,0) at rwsleep+0xd6 sys/kern/kern_synch.c:303
sosend(fffffd80692199c8,0,ffff800021209038,0,0,0) at sosend+0x76b sys/kern/uipc_socket.c:623
fifo_write(ffff800021208f80) at fifo_write+0x80 sys/miscfs/fifofs/fifo_vnops.c:279
VOP_WRITE(fffffd806fd50718,ffff800021209038,3,fffffd807f7d74e0) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000211e7d48,fffffd806fd50718,fffffd807f7d74e0,ffff800021209108,ffff8000212090e0) at ktrwriteraw+0x16c sys/kern/kern_ktrace.c:664
ktrgenio(ffff8000211e7d48,7,0,ffff800000db9f60,1126) at ktrgenio+0x272 ktrwrite2 sys/kern/kern_ktrace.c:626 [inline]
ktrgenio(ffff8000211e7d48,7,0,ffff800000db9f60,1126) at ktrgenio+0x272 sys/kern/kern_ktrace.c:258
dofilereadv(ffff8000211e7d48,7,ffff800021209278,0,ffff800021209360) at dofilereadv+0x2e7 sys/kern/sys_generic.c:263
sys_read(ffff8000211e7d48,ffff800021209310,ffff800021209360) at sys_read+0x87 sys/kern/sys_generic.c:167
syscall(ffff8000212093e0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff8000212093e0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f1c725afe30, count: -12
ddb{0}> show registers
rdi 0
rsi 0x20000 acpi_pdirpa+0xbe63
rbp 0xffff800021208d00
rbx 0xe
rdx 0
rcx 0xffff8000211e7d48
rax 0xffffffff82c09ff0 cpu_info_full_primary+0x1ff0
r8 0
r9 0
r10 0xcf64cca36dbf59c0
r11 0xc2cb302f2351fd3e
r12 0
r13 0xfffffd80692199e0
r14 0
r15 0xffff8000211e7d48
rip 0xffffffff81cc31ac witness_checkorder+0x1ec
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800021208c50
ss 0x10
witness_checkorder+0x1ec: movl 0x8(%r14),%ebx
ddb{0}> show proc
PROC (sshd) tid=213997 pid=19884 tcnt=1 stat=onproc
flags process=12<EXEC,SUGID> proc=1<INKTR>
runpri=24, usrpri=51, slppri=24, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0xffffffffffffffff, list=0xffff8000211e6560,0xffff8000211e72b8
process=0xffff8000ffff4ca0 user=0xffff800021204000, vmspace=0xfffffd807734fcc0
estcpu=1, cpticks=1, pctcpu=0.3, user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
75668 75902 95098 0 3 0x82 piperd syz-executor.7
55164 192612 95098 0 3 0x82 piperd syz-executor.6
12207 180375 0 0 3 0x14280 nfsidl nfsio
52209 340418 0 0 3 0x14280 nfsidl nfsio
74850 100800 0 0 3 0x14280 nfsidl nfsio
13150 174936 0 0 3 0x14280 nfsidl nfsio
82839 354656 0 0 3 0x14280 nfsidl nfsio
75237 258878 0 0 3 0x14280 nfsidl nfsio
21647 297637 0 0 3 0x14280 nfsidl nfsio
27510 135075 0 0 3 0x14280 nfsidl nfsio
43875 404460 0 0 3 0x14280 nfsidl nfsio
19721 374906 0 0 3 0x14280 nfsidl nfsio
68351 88349 0 0 3 0x14280 nfsidl nfsio
38563 317920 0 0 3 0x14280 nfsidl nfsio
29148 37979 0 0 3 0x14280 nfsidl nfsio
47310 122511 0 0 3 0x14280 nfsidl nfsio
97038 73347 0 0 3 0x14280 nfsidl nfsio
99774 93049 0 0 3 0x14280 nfsidl nfsio
69136 9203 0 0 3 0x14280 nfsidl nfsio
489 76017 0 0 3 0x14280 nfsidl nfsio
832 118163 0 0 3 0x14280 nfsidl nfsio
97592 402492 0 0 3 0x14280 nfsidl nfsio
51103 128771 0 0 3 0x14200 bored sosplice
26900 464507 95098 0 3 0x82 piperd syz-executor.5
18308 435925 95098 0 3 0x82 piperd syz-executor.4
68840 385030 95098 0 3 0x82 piperd syz-executor.2
43960 288672 95098 0 2 0x83 syz-executor.3
13260 293329 95098 0 3 0x82 nanoslp syz-executor.1
32826 140656 95098 0 3 0x82 piperd syz-executor.0
95098 300004 54660 0 2 0x2000083 syz-fuzzer
95098 26910 54660 0 3 0x6000082 thrsleep syz-fuzzer
95098 293641 54660 0 3 0x6000082 wait syz-fuzzer
95098 166764 54660 0 3 0x6000082 wait syz-fuzzer
95098 59746 54660 0 3 0x6000082 wait syz-fuzzer
95098 424276 54660 0 3 0x6000082 thrsleep syz-fuzzer
95098 199085 54660 0 3 0x6000082 thrsleep syz-fuzzer
95098 158265 54660 0 3 0x6000082 wait syz-fuzzer
95098 152006 54660 0 3 0x6000082 wait syz-fuzzer
95098 463039 54660 0 3 0x6000082 kqread syz-fuzzer
95098 223895 54660 0 3 0x6000082 thrsleep syz-fuzzer
95098 483723 54660 0 3 0x6000082 wait syz-fuzzer
95098 335791 54660 0 2 0x6000083 syz-fuzzer
95098 482449 54660 0 3 0x6000082 wait syz-fuzzer
95098 240003 54660 0 3 0x6000082 thrsleep syz-fuzzer
95098 518859 54660 0 3 0x6000082 wait syz-fuzzer
54660 165932 19884 0 3 0x10008a sigsusp ksh
*19884 213997 69990 0 7 0x13 sshd
49723 423158 1 0 3 0x100083 ttyin getty
69990 177588 1 0 3 0x88 kqread sshd
65020 230461 39791 74 3 0x1100092 bpf pflogd
39791 56377 1 0 3 0x80 netio pflogd
43147 36903 20184 73 3 0x1100090 kqread syslogd
20184 52391 1 0 3 0x100082 netio syslogd
93814 217295 1 0 3 0x100080 kqread resolvd
45062 502870 53490 77 3 0x100092 kqread dhcpleased
91080 233904 53490 77 3 0x100092 kqread dhcpleased
53490 265619 1 0 3 0x80 kqread dhcpleased
45505 401803 0 0 3 0x14200 bored smr
36676 184744 0 0 2 0x14200 zerothread
27020 507138 0 0 3 0x14200 aiodoned aiodoned
6578 456961 0 0 3 0x14200 syncer update
63225 105545 0 0 3 0x14200 cleaner cleaner
60638 444182 0 0 3 0x14200 reaper reaper
66182 136347 0 0 3 0x14200 pgdaemon pagedaemon
28176 17965 0 0 3 0x14200 bored viomb
88420 446261 0 0 3 0x40014200 acpi0 acpi0
40615 70533 0 0 7 0x40014200 idle1
28545 444746 0 0 3 0x14200 bored softnet3
81708 320190 0 0 3 0x14200 bored softnet2
26553 342854 0 0 3 0x14200 bored softnet1
27347 9553 0 0 3 0x14200 bored softnet0
10477 290329 0 0 3 0x14200 bored systqmp
65325 271253 0 0 3 0x14200 bored systq
85782 167304 0 0 3 0x14200 tmoslp softclockmp
12189 164700 0 0 3 0x40014200 tmoslp softclock
66932 475383 0 0 3 0x40014200 idle0
1 345761 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 19884 (sshd) thread 0xffff8000211e7d48 (213997)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d7b618)
#0 witness_lock+0x447
#1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227
#2 mi_switch+0x46d sys/kern/sched_bsd.c:470
#3 sleep_finish+0x19b sys/kern/kern_synch.c:414
#4 rwsleep+0xab sys/kern/kern_synch.c:300
#5 sosend+0x76b sys/kern/uipc_socket.c:623
#6 fifo_write+0x80 sys/miscfs/fifofs/fifo_vnops.c:279
#7 VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
#8 ktrwriteraw+0x16c sys/kern/kern_ktrace.c:664
#9 ktrgenio+0x272 ktrwrite2 sys/kern/kern_ktrace.c:626 [inline]
#9 ktrgenio+0x272 sys/kern/kern_ktrace.c:258
#10 dofilereadv+0x2e7 sys/kern/sys_generic.c:263
#11 sys_read+0x87 sys/kern/sys_generic.c:167
#12 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#12 syscall+0x606 sys/arch/amd64/amd64/trap.c:623
#13 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10197 6494K 6899K 78643K 14611 0
pcb 13 14K 16K 78643K 120 0
rtable 237 7K 7K 78643K 459 0
pf 32 9K 10K 78643K 95 0
ifaddr 45 15K 16K 78643K 81 0
ifgroup 55 2K 2K 78643K 143 0
sysctl 3 0K 0K 78643K 3 0
counters 60 35K 36K 78643K 108 0
ioctlops 0 0K 4K 78643K 1512 0
iov 0 0K 16K 78643K 196 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1407 88K 88K 78643K 2537 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 37 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 178 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 10 33K 89K 78643K 3067 0
sigio 0 0K 0K 78643K 317 0
proc 69 91K 115K 78643K 712 0
subproc 104 6K 6K 78643K 141 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 108 0
in_multi 99 7K 7K 78643K 160 0
ether_multi 1 0K 0K 78643K 4 0
mrt 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 67 307K 307K 78643K 67 0
exec 0 0K 1K 78643K 843 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 343 92K 97K 78643K 31420 0
UVM aobj 50 2K 2K 78643K 50 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 108 0
NDP 12 0K 1K 78643K 56 0
temp 82 5924K 5996K 78643K 17546 0
kqueue 12 18K 24K 78643K 169 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 135 0 132 3 2 1 3 0 8 0
rtentry 112 138 0 28 4 0 4 4 0 8 0
unpcb 144 1815 0 1800 18 12 6 6 0 8 5
syncache 312 30 0 30 7 6 1 1 0 8 1
tcpqe 32 264 0 264 7 6 1 1 0 8 1
tcpcb 808 879 0 860 31 28 3 11 0 8 1
arp 120 22 0 4 1 0 1 1 0 8 0
ipq 40 2 0 2 1 0 1 1 0 8 1
ipqe 40 6 0 6 1 0 1 1 0 8 1
inpcb 368 3826 0 3804 45 34 11 17 0 8 7
nd6 136 32 0 8 1 0 1 1 0 8 0
pkpcb 40 9 0 9 3 3 0 1 0 8 0
kcovpl 48 10 0 2 1 0 1 1 0 8 0
ppxss 1256 6 0 6 2 2 0 1 0 8 0
pffrag 232 63 0 61 1 0 1 1 0 482 0
pffrnode 88 61 0 59 1 0 1 1 0 8 0
pffrent 40 167 0 165 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
pfstitem 24 152 0 123 1 0 1 1 0 8 0
pfstkey 128 152 0 123 2 0 2 2 0 8 0
pfstate 376 152 0 123 6 0 6 6 0 8 0
pfrule 1344 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 561 0 102 29 0 29 29 0 8 0
art_table 32 562 0 102 4 0 4 4 0 8 0
art_node 16 134 0 34 1 0 1 1 0 8 0
semapl 112 174 0 164 1 0 1 1 0 8 0
shmpl 112 47 0 0 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 5335 0 3876 92 0 92 92 0 8 0
ffsino 272 5335 0 3876 98 0 98 98 0 8 0
nchpl 144 9768 0 9274 63 40 23 63 0 8 0
uvmvnodes 80 6298 0 0 129 0 129 129 0 8 0
vnodes 216 6298 0 0 350 0 350 350 0 8 0
namei 1024 29882 0 29882 4 3 1 2 0 8 1
percpumem 16 67 0 24 1 0 1 1 0 8 0
vcpupl 2048 17 0 0 3 0 3 3 0 8 0
vmpool 696 17 0 0 2 0 2 2 0 8 0
kstatmem 264 72 0 48 2 0 2 2 0 8 0
scxspl 216 27102 0 27102 14 13 1 8 1 8 1
plimitpl 152 414 0 398 1 0 1 1 0 8 0
sigapl 424 3397 0 3334 10 2 8 8 0 8 0
futexpl 64 27471 0 27471 1 0 1 1 0 8 1
knotepl 120 353 0 0 11 0 11 11 0 8 0
kqueuepl 216 413 0 405 7 4 3 5 0 8 2
pipepl 320 801 0 773 23 20 3 8 0 8 0
fdescpl 496 3358 0 3335 5 0 5 5 0 8 0
filepl 152 18977 0 18739 46 29 17 19 0 8 7
lockfpl 104 1229 0 1227 5 3 2 2 0 8 1
lockfspl 48 459 0 457 1 0 1 1 0 8 0
sessionpl 144 26 0 9 1 0 1 1 0 8 0
pgrppl 48 30 0 13 1 0 1 1 0 8 0
ucredpl 104 1926 0 1914 1 0 1 1 0 8 0
zombiepl 144 3335 0 3334 2 1 1 1 0 8 0
processpl 1072 3397 0 3334 5 0 5 5 0 8 0
procpl 680 8245 0 8167 12 3 9 10 0 8 1
sosppl 168 30 0 30 3 2 1 1 0 8 1
sockpl 488 5790 0 5750 97 82 15 25 0 8 8
mcl64k 65536 7 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 10 0 0 1 0 1 1 0 8 0
mcl9k 9216 4 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 28 0 0 4 1 3 4 0 8 0
mcl2k2 2112 8 0 0 1 0 1 1 0 8 0
mcl2k 2048 285 0 0 36 0 36 36 0 8 1
mtagpl 96 249 0 0 7 0 7 7 0 8 0
mbufpl 256 1221 0 0 72 0 72 72 0 8 0
bufpl 288 7768 0 1441 453 0 453 453 0 8 0
anonpl 24 456698 0 443778 135 43 92 108 0 186 0
amapchunkpl 152 99636 0 98910 55 17 38 41 0 158 1
amappl16 200 10844 0 10433 59 36 23 35 0 8 0
amappl15 192 8 0 8 1 1 0 1 0 8 0
amappl14 184 163 0 151 2 1 1 2 0 8 0
amappl13 176 11 0 11 1 1 0 1 0 8 0
amappl12 168 4059 0 4033 4 2 2 3 0 8 0
amappl11 160 58 0 43 1 0 1 1 0 8 0
amappl10 152 33 0 23 1 0 1 1 0 8 0
amappl9 144 187 0 187 5 5 0 1 0 8 0
amappl8 136 331 0 245 4 0 4 4 0 8 0
amappl7 128 197 0 171 2 0 2 2 0 8 0
amappl6 120 315 0 306 1 0 1 1 0 8 0
amappl5 112 183 0 172 1 0 1 1 0 8 0
amappl4 104 524 0 493 2 1 1 2 0 8 0
amappl3 96 19727 0 19665 3 0 3 3 0 8 0
amappl2 88 4063 0 3992 3 1 2 3 0 8 0
amappl1 80 20211 0 19664 23 10 13 23 0 8 0
amappl 88 30770 0 30582 6 0 6 6 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 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 49 0 0 1 0 1 1 0 8 0
uaddrrnd 24 3376 0 3336 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 3376 0 3336 1 0 1 1 0 8 0
vmmpekpl 168 29769 0 29709 4 0 4 4 0 8 0
vmmpepl 168 214189 0 212121 169 56 113 120 0 357 4
vmsppl 464 3375 0 3336 6 0 6 6 0 8 0
rwobjpl 56 63724 0 55891 115 3 112 112 0 8 0
pdppl 4096 6759 0 6689 288 202 86 86 0 8 16
pvpl 32 1111735 0 1093529 404 235 169 366 0 265 0
pmappl 248 3375 0 3336 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1188 0 281 27 0 27 27 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
witness_checkorder(fffffd80692199e0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794
rw_enter(fffffd80692199d0,1) at rw_enter+0xd5 sys/kern/kern_rwlock.c:249
rwsleep(fffffd8069219b10,fffffd80692199d0,118,ffffffff82821449,0) at rwsleep+0xd6 sys/kern/kern_synch.c:303
sosend(fffffd80692199c8,0,ffff800021209038,0,0,0) at sosend+0x76b sys/kern/uipc_socket.c:623
fifo_write(ffff800021208f80) at fifo_write+0x80 sys/miscfs/fifofs/fifo_vnops.c:279
VOP_WRITE(fffffd806fd50718,ffff800021209038,3,fffffd807f7d74e0) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000211e7d48,fffffd806fd50718,fffffd807f7d74e0,ffff800021209108,ffff8000212090e0) at ktrwriteraw+0x16c sys/kern/kern_ktrace.c:664
ktrgenio(ffff8000211e7d48,7,0,ffff800000db9f60,1126) at ktrgenio+0x272 ktrwrite2 sys/kern/kern_ktrace.c:626 [inline]
ktrgenio(ffff8000211e7d48,7,0,ffff800000db9f60,1126) at ktrgenio+0x272 sys/kern/kern_ktrace.c:258
dofilereadv(ffff8000211e7d48,7,ffff800021209278,0,ffff800021209360) at dofilereadv+0x2e7 sys/kern/sys_generic.c:263
sys_read(ffff8000211e7d48,ffff800021209310,ffff800021209360) at sys_read+0x87 sys/kern/sys_generic.c:167
syscall(ffff8000212093e0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff8000212093e0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f1c725afe30, count: -12
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp
x86_ipi_db(ffff800020d48ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d48ff0) at sched_idle+0x41e sys/kern/kern_sched.c:191
end trace frame: 0x0, count: 10
ddb{1}> trace
x86_ipi_db(ffff800020d48ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d48ff0) at sched_idle+0x41e sys/kern/kern_sched.c:191
end trace frame: 0x0, count: -5