q i鉆>黈C?'尨館谐;首賥WB}#$panic: malloc: out of space in kmem_map
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*378465 62532 0 0x2 0 0K syz-executor.2
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82603a4b) at panic+0x177 sys/kern/subr_prf.c:198
malloc(10000,7f,1) at malloc+0xacc sys/kern/kern_malloc.c:246
ufs_readdir(ffff80002416bf00) at ufs_readdir+0x148 sys/ufs/ufs/ufs_vnops.c:1444
VOP_READDIR(fffffd80697a9bf8,ffff80002416bf80,fffffd807f7d73a8,ffff80002416bfc4) at VOP_READDIR+0xbf sys/kern/vfs_vops.c:444
sys_getdents(ffff8000212962a8,ffff80002416c040,ffff80002416c090) at sys_getdents+0x20d sys/kern/vfs_syscalls.c:3182
syscall(ffff80002416c110) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002416c110) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffff80a0, 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: malloc: out of space in kmem_map
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82603a4b) at panic+0x177 sys/kern/subr_prf.c:198
malloc(10000,7f,1) at malloc+0xacc sys/kern/kern_malloc.c:246
ufs_readdir(ffff80002416bf00) at ufs_readdir+0x148 sys/ufs/ufs/ufs_vnops.c:1444
VOP_READDIR(fffffd80697a9bf8,ffff80002416bf80,fffffd807f7d73a8,ffff80002416bfc4) at VOP_READDIR+0xbf sys/kern/vfs_vops.c:444
sys_getdents(ffff8000212962a8,ffff80002416c040,ffff80002416c090) at sys_getdents+0x20d sys/kern/vfs_syscalls.c:3182
syscall(ffff80002416c110) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002416c110) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffff80a0, count: -8
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002416bb90
rbx 0xffffffff82925b8f cpu_info_full_primary+0x2b8f
rdx 0
rcx 0
rax 0xffff8000212962a8
r8 0x101010101010101
r9 0x8080808080808080
r10 0x471b84cc411350a0
r11 0xbd5e25cff89e0d9
r12 0xffffffff82925990 cpu_info_full_primary+0x2990
r13 0
r14 0
r15 0x1
rip 0xffffffff8142b318 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002416bb80
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.2) pid=378465 stat=onproc
flags process=2<EXEC> proc=0
pri=84, usrpri=84, nice=20
forw=0xffffffffffffffff, list=0xffff800021334000,0xffff800021335270
process=0xffff8000ffff9928 user=0xffff800024167000, vmspace=0xfffffd806ee09cf8
estcpu=36, cpticks=1, pctcpu=0.1
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
60721 477189 81162 0 2 0 syz-executor.6
60721 58043 81162 0 3 0x4000080 fsleep syz-executor.6
521 54695 13762 0 2 0 syz-executor.7
521 109069 13762 0 3 0x4000080 fsleep syz-executor.7
521 295296 13762 0 3 0x4000080 fsleep syz-executor.7
38894 418734 20818 0 2 0 syz-executor.5
38894 252748 20818 0 3 0x4000080 fsleep syz-executor.5
70951 303425 12339 0 2 0 syz-executor.4
70951 58649 12339 0 3 0x4000080 fsleep syz-executor.4
76455 101845 12064 0 2 0 syz-executor.0
76455 470585 12064 0 3 0x4000080 fsleep syz-executor.0
64370 209492 27766 0 2 0 syz-executor.1
64370 281905 27766 0 3 0x4000080 fsleep syz-executor.1
64370 311303 27766 0 3 0x4000080 fsleep syz-executor.1
81898 73414 39343 0 2 0 syz-executor.3
81898 262956 39343 0 3 0x4000000 pfanchor syz-executor.3
13762 42043 64311 0 3 0x82 nanoslp syz-executor.7
81162 245851 64311 0 3 0x82 nanoslp syz-executor.6
27766 235309 64311 0 3 0x82 nanoslp syz-executor.1
20818 336706 64311 0 3 0x82 nanoslp syz-executor.5
16431 354916 1 0 3 0x100083 ttyin getty
*62532 378465 64311 0 7 0x2 syz-executor.2
12064 501806 64311 0 3 0x82 nanoslp syz-executor.0
26894 271527 0 0 3 0x14280 nfsidl nfsio
9964 509507 0 0 3 0x14280 nfsidl nfsio
25385 476261 0 0 3 0x14280 nfsidl nfsio
84759 367620 0 0 3 0x14280 nfsidl nfsio
47915 269209 0 0 3 0x14280 nfsidl nfsio
26700 196868 0 0 3 0x14280 nfsidl nfsio
80394 240658 0 0 3 0x14280 nfsidl nfsio
98201 162728 0 0 3 0x14280 nfsidl nfsio
6981 340590 0 0 3 0x14280 nfsidl nfsio
83177 132307 0 0 3 0x14280 nfsidl nfsio
25204 171182 0 0 3 0x14280 nfsidl nfsio
35803 466051 0 0 3 0x14280 nfsidl nfsio
12845 244621 0 0 3 0x14280 nfsidl nfsio
24245 53353 0 0 3 0x14280 nfsidl nfsio
91278 240319 0 0 3 0x14280 nfsidl nfsio
37303 242398 0 0 3 0x14280 nfsidl nfsio
98007 64625 0 0 3 0x14280 nfsidl nfsio
99564 19034 0 0 3 0x14280 nfsidl nfsio
31874 388187 0 0 3 0x14280 nfsidl nfsio
14672 432210 0 0 3 0x14280 nfsidl nfsio
7826 198299 0 0 3 0x14200 bored sosplice
12339 321165 64311 0 3 0x82 nanoslp syz-executor.4
39343 66769 64311 0 3 0x82 nanoslp syz-executor.3
64311 463572 44418 0 3 0x82 wait syz-fuzzer
64311 368436 44418 0 3 0x4000082 nanoslp syz-fuzzer
64311 251530 44418 0 3 0x4000082 kqread syz-fuzzer
64311 155800 44418 0 3 0x4000082 thrsleep syz-fuzzer
64311 478557 44418 0 3 0x4000082 wait syz-fuzzer
64311 227372 44418 0 3 0x4000082 wait syz-fuzzer
64311 59529 44418 0 3 0x4000082 thrsleep syz-fuzzer
64311 20507 44418 0 3 0x4000082 thrsleep syz-fuzzer
64311 405619 44418 0 3 0x4000082 thrsleep syz-fuzzer
64311 481390 44418 0 3 0x4000082 wait syz-fuzzer
64311 231544 44418 0 3 0x4000082 wait syz-fuzzer
64311 219510 44418 0 3 0x4000082 wait syz-fuzzer
64311 398949 44418 0 3 0x4000082 wait syz-fuzzer
64311 186615 44418 0 3 0x4000082 thrsleep syz-fuzzer
64311 274655 44418 0 3 0x4000082 thrsleep syz-fuzzer
64311 506444 44418 0 3 0x4000082 wait syz-fuzzer
44418 406333 13016 0 3 0x10008a sigsusp ksh
13016 3605 23515 0 3 0x9a kqread sshd
23515 100371 1 0 3 0x88 kqread sshd
87502 389965 97027 74 3 0x1100092 bpf pflogd
97027 370900 1 0 3 0x80 netio pflogd
58507 404516 7400 73 3 0x1100090 kqread syslogd
7400 70051 1 0 3 0x100082 netio syslogd
83332 147925 1 0 3 0x100080 kqread resolvd
83062 259784 0 0 3 0x14200 bored smr
84829 68927 0 0 2 0x14200 zerothread
31672 445971 0 0 3 0x14200 aiodoned aiodoned
84124 319149 0 0 3 0x14200 syncer update
47369 482712 0 0 3 0x14200 cleaner cleaner
8216 354225 0 0 3 0x14200 reaper reaper
41357 335856 0 0 3 0x14200 pgdaemon pagedaemon
55504 240992 0 0 3 0x14200 bored viomb
26812 299874 0 0 3 0x40014200 acpi0 acpi0
34045 349044 0 0 7 0x40014200 idle1
6185 55879 0 0 3 0x14200 bored softnet
5687 404479 0 0 3 0x14200 bored softnet
12611 69060 0 0 3 0x14200 bored softnet
72562 129983 0 0 3 0x14200 bored softnet
54977 467310 0 0 3 0x14200 bored systqmp
85199 443467 0 0 3 0x14200 bored systq
95727 176305 0 0 3 0x40014200 bored softclock
44246 459938 0 0 3 0x40014200 idle0
1 231342 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 81898 (syz-executor.3) thread 0xffff800021336d30 (262956)
exclusive rwlock pf_lock r = 0 (0xffffffff82957780)
#0 witness_lock+0x44d
#1 pfioctl+0x3ab7 sys/net/pf_ioctl.c:2481
#2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
#3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:525
#4 sys_ioctl+0x4a2
#5 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#5 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599
#6 Xsyscall+0x128
exclusive rwlock netlock r = 0 (0xffffffff8295d1b0)
#0 witness_lock+0x44d
#1 pfioctl+0x3aab sys/net/pf_ioctl.c:2480
#2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
#3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:525
#4 sys_ioctl+0x4a2
#5 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#5 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599
#6 Xsyscall+0x128
exclusive rwlock pfioctl_rw r = 0 (0xffffffff829577e0)
#0 witness_lock+0x44d
#1 pfioctl+0x167 sys/net/pf_ioctl.c:1130
#2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
#3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:525
#4 sys_ioctl+0x4a2
#5 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#5 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599
#6 Xsyscall+0x128
Process 62532 (syz-executor.2) thread 0xffff8000212962a8 (378465)
exclusive rrwlock inode r = 0 (0xfffffd806ef3a708)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 sys_getdents+0x19a sys/kern/vfs_syscalls.c:3167
#6 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#6 syscall+0x438 sys/arch/amd64/amd64/trap.c:599
#7 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82aaf200)
#0 witness_lock+0x44d
#1 syscall+0x424 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#1 syscall+0x424 sys/arch/amd64/amd64/trap.c:599
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10224 6501K 7625K 78643K 23907 0
pcb 13 16K 21K 78643K 4883 0
rtable 198 15K 16K 78643K 1176 0
ifaddr 82 19K 20K 78643K 463 0
sysctl 2 0K 0K 78643K 2 0
counters 58 35K 36K 78643K 390 0
ioctlops 0 0K 4K 78643K 2266 0
iov 0 0K 16K 78643K 473 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1644 103K 103K 78643K 14659 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 78 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 2280 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 17 61K 93K 78643K 8925 0
sigio 0 0K 0K 78643K 140 0
proc 64 67K 115K 78643K 1245 0
subproc 104 6K 10K 78643K 537 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 2682 0
in_multi 85 5K 7K 78643K 476 0
ether_multi 1 0K 0K 78643K 41 0
mrt 1 0K 0K 78643K 26 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 223 996K 996K 78643K 223 0
exec 0 0K 1K 78643K 1323 0
pfkey data 0 0K 0K 78643K 7 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 373 97K 109K 78643K 60766 0
UVM aobj 131 7K 7K 78643K 138 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 674 0
NDP 13 0K 1K 78643K 145 0
temp 136 4759K 4818K 78643K 673394 0
kqueue 6 10K 26K 78643K 771 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 1405 0 1403 7 4 3 3 0 8 2
rtentry 112 396 0 310 4 0 4 4 0 8 0
unpcb 144 4436 0 4428 59 53 6 8 0 8 5
syncache 296 33 0 33 6 6 0 1 0 8 0
tcpqe 32 172 0 172 5 5 0 1 0 8 0
tcpcb 776 5568 0 5562 85 81 4 14 0 8 3
arp 120 61 0 45 1 0 1 1 0 8 0
inpcb 368 13551 0 13545 132 128 4 19 0 8 3
nd6 48 87 0 66 1 0 1 1 0 8 0
pkpcb 40 15 0 15 4 4 0 1 0 8 0
kcovpl 48 25 0 17 1 0 1 1 0 8 0
ppxss 1256 107 0 107 10 10 0 1 0 8 0
pppxif 1448 91 0 91 8 8 0 1 0 8 0
pfstscr 40 13 0 13 3 3 0 1 0 8 0
pffrag 232 18 0 18 5 5 0 1 0 482 0
pffrnode 88 18 0 18 5 5 0 1 0 8 0
pffrent 40 181 0 181 6 6 0 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
pfanchor 1280 137647 0 49399 7354 0 7354 7354 0 8 0
pfqueue 264 2 0 2 1 1 0 1 0 8 0
pfstitem 24 104 0 98 1 0 1 1 0 8 0
pfstkey 128 187 0 184 2 1 1 2 0 8 0
pfstate 384 174 0 168 4 3 1 4 0 8 0
pfrule 1344 21 0 20 2 1 1 2 0 8 0
rttmr 136 4 0 4 1 1 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1863 0 1484 49 23 26 32 0 8 0
art_table 32 1864 0 1484 7 3 4 5 0 8 0
art_node 16 395 0 322 1 0 1 1 0 8 0
sysvmsgpl 40 43 0 3 1 0 1 1 0 8 0
semupl 112 9 0 9 1 1 0 1 0 8 0
semapl 112 2276 0 2266 1 0 1 1 0 8 0
shmpl 112 135 0 7 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 13099 0 11638 92 0 92 92 0 8 0
ffsino 272 13099 0 11638 98 0 98 98 0 8 0
nchpl 144 24920 0 23275 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 105140 0 105140 4 3 1 2 0 8 1
percpumem 16 207 0 166 1 0 1 1 0 8 0
kstatmem 264 176 0 150 5 3 2 3 0 8 0
scsiplug 72 7 0 7 1 1 0 1 0 8 0
scxspl 216 71610 0 71610 15 14 1 8 0 8 1
plimitpl 152 563 0 548 1 0 1 1 0 8 0
sigapl 424 9222 0 9157 10 2 8 8 0 8 0
futexpl 64 117447 0 117439 1 0 1 1 0 8 0
knotepl 120 687 0 0 15 0 15 15 0 8 0
kqueuepl 216 1617 0 1612 29 28 1 5 0 8 0
pipepl 320 3463 0 3432 49 40 9 11 0 8 6
fdescpl 496 9183 0 9156 5 1 4 5 0 8 0
filepl 152 83704 0 83458 105 87 18 23 0 8 7
lockfpl 104 1506 0 1505 6 5 1 2 0 8 0
lockfspl 48 384 0 383 1 0 1 1 0 8 0
sessionpl 144 44 0 28 1 0 1 1 0 8 0
pgrppl 48 57 0 41 1 0 1 1 0 8 0
ucredpl 104 15454 0 15445 1 0 1 1 0 8 0
zombiepl 144 9157 0 9157 1 0 1 1 0 8 1
processpl 1072 9222 0 9157 5 0 5 5 0 8 0
procpl 672 24309 0 24220 13 4 9 10 0 8 0
srpgc 96 24 0 24 6 6 0 1 0 8 0
sosppl 168 29 0 29 6 6 0 1 0 8 0
sockpl 488 19414 0 19398 326 315 11 29 0 8 8
mcl64k 65536 14 0 0 2 0 2 2 0 8 0
mcl16k 16384 11 0 0 2 0 2 2 0 8 0
mcl12k 12288 17 0 0 2 0 2 2 0 8 0
mcl9k 9216 9 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 33 0 0 3 0 3 3 0 8 0
mcl2k2 2112 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 446 0 0 54 6 48 54 0 8 0
mtagpl 96 1575 0 0 39 2 37 39 0 8 0
mbufpl 256 3311 0 0 203 1 202 203 0 8 0
bufpl 288 16127 0 9792 453 0 453 453 0 8 0
anonpl 24 2906056 0 2886088 266 131 135 188 0 186 0
amapchunkpl 152 171318 0 170502 93 59 34 62 0 158 0
amappl16 200 84971 0 84334 116 77 39 47 0 8 2
amappl15 192 5 0 5 2 2 0 1 0 8 0
amappl14 184 193 0 184 2 1 1 2 0 8 0
amappl13 176 8 0 8 2 2 0 1 0 8 0
amappl12 168 617 0 615 1 0 1 1 0 8 0
amappl11 160 50 0 42 1 0 1 1 0 8 0
amappl10 152 49 0 39 1 0 1 1 0 8 0
amappl9 144 991 0 989 1 0 1 1 0 8 0
amappl8 136 416 0 319 4 0 4 4 0 8 0
amappl7 128 209 0 184 2 0 2 2 0 8 0
amappl6 120 285 0 265 1 0 1 1 0 8 0
amappl5 112 255 0 249 1 0 1 1 0 8 0
amappl4 104 732 0 694 5 3 2 2 0 8 0
amappl3 96 26617 0 26561 2 0 2 2 0 8 0
amappl2 88 9830 0 9767 3 1 2 3 0 8 0
amappl1 80 208434 0 207723 23 6 17 23 0 8 0
amappl 88 59964 0 59748 7 1 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 72 137 0 7 3 0 3 3 0 8 0
uaddrrnd 24 9183 0 9156 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 9183 0 9156 1 0 1 1 0 8 0
vmmpekpl 168 78946 0 78898 3 0 3 3 0 8 0
vmmpepl 168 903236 0 900379 248 115 133 168 0 357 2
vmsppl 368 9182 0 9156 4 1 3 4 0 8 0
rwobjpl 56 291275 0 283450 124 11 113 115 0 8 0
pdppl 4096 18373 0 18312 291 228 63 83 0 8 2
pvpl 32 5500138 0 5473465 492 254 238 335 0 265 0
pmappl 248 9182 0 9156 3 1 2 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1407 0 402 30 0 30 30 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82603a4b) at panic+0x177 sys/kern/subr_prf.c:198
malloc(10000,7f,1) at malloc+0xacc sys/kern/kern_malloc.c:246
ufs_readdir(ffff80002416bf00) at ufs_readdir+0x148 sys/ufs/ufs/ufs_vnops.c:1444
VOP_READDIR(fffffd80697a9bf8,ffff80002416bf80,fffffd807f7d73a8,ffff80002416bfc4) at VOP_READDIR+0xbf sys/kern/vfs_vops.c:444
sys_getdents(ffff8000212962a8,ffff80002416c040,ffff80002416c090) at sys_getdents+0x20d sys/kern/vfs_syscalls.c:3182
syscall(ffff80002416c110) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002416c110) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffff80a0, count: -8
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a 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+0x23
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020dd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175
end trace frame: 0x0, count: 10
ddb{1}> trace
x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a 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+0x23
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020dd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175
end trace frame: 0x0, count: -5