panic: free: size too small 8 <= 32 / 2 (0xffff800001625380) type rtable
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
199656 80041 0 0 0 1 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83536012) at panic+0x1e5 sys/kern/subr_prf.c:198
free(ffff800001625380,5,8) at free+0x690 sys/kern/kern_malloc.c:387
rtfree(fffff2006cc5add0) at rtfree+0x347 sys/net/route.c:641
rt_ifa_purge(ffff800001626a00) at rt_ifa_purge+0x1a0 sys/net/route.c:1481
in6_unlink_ifa(ffff800001626a00,ffff80000160a000) at in6_unlink_ifa+0x83f sys/netinet6/in6.c:938
in6_ifdetach(ffff80000160a000) at in6_ifdetach+0x9e sys/netinet6/in6_ifattach.c:416
if_detach(ffff80000160a000) at if_detach+0x30f sys/net/if.c:1314
tun_clone_destroy(ffff80000160a000) at tun_clone_destroy+0x2ce sys/net/if_tun.c:343
if_clone_destroy(ffff80002a2ec0c0) at if_clone_destroy+0x205 sys/net/if.c:1479
tun_dev_close(5d02,7) at tun_dev_close+0x1d9 sys/net/if_tun.c:526
spec_close(ffff80002a2ec180) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffff200783c77c8,7,fffff200097fd2d8,ffff800045ffd9f8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffff2006cecc400,ffff800045ffd9f8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffff2006cecc400,ffff800045ffd9f8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:621
end trace frame: 0xffff80002a2ec2a0, count: 0
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: free: size too small 8 <= 32 / 2 (0xffff800001625380) type rtable
ddb{0}> show kasan
No such command
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83536012) at panic+0x1e5 sys/kern/subr_prf.c:198
free(ffff800001625380,5,8) at free+0x690 sys/kern/kern_malloc.c:387
rtfree(fffff2006cc5add0) at rtfree+0x347 sys/net/route.c:641
rt_ifa_purge(ffff800001626a00) at rt_ifa_purge+0x1a0 sys/net/route.c:1481
in6_unlink_ifa(ffff800001626a00,ffff80000160a000) at in6_unlink_ifa+0x83f sys/netinet6/in6.c:938
in6_ifdetach(ffff80000160a000) at in6_ifdetach+0x9e sys/netinet6/in6_ifattach.c:416
if_detach(ffff80000160a000) at if_detach+0x30f sys/net/if.c:1314
tun_clone_destroy(ffff80000160a000) at tun_clone_destroy+0x2ce sys/net/if_tun.c:343
if_clone_destroy(ffff80002a2ec0c0) at if_clone_destroy+0x205 sys/net/if.c:1479
tun_dev_close(5d02,7) at tun_dev_close+0x1d9 sys/net/if_tun.c:526
spec_close(ffff80002a2ec180) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffff200783c77c8,7,fffff200097fd2d8,ffff800045ffd9f8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffff2006cecc400,ffff800045ffd9f8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffff2006cecc400,ffff800045ffd9f8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:621
fdrop(fffff2006cecc400,ffff800045ffd9f8) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffff2006cecc400,ffff800045ffd9f8) at closef+0x192 sys/kern/kern_descrip.c:1265
fdfree(ffff800045ffd9f8) at fdfree+0x116 sys/kern/kern_descrip.c:1196
exit1(ffff800045ffd9f8,43,0,1) at exit1+0x595 sys/kern/kern_exit.c:215
sys_exit(ffff800045ffd9f8,ffff80002a2ec4f0,ffff80002a2ec440) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a2ec4f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2ec4f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x785a4b85db70, count: -21
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a2ebcf0
rbx 0xffffffff8398be0f cpu_info_full_primary+0x2e0f
rdx 0
rcx 0xffff800045ffd9f8
rax 0xffffffff8398aff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xcf2f1baa0c2ea57e
r11 0x2cab435918e26a
r12 0xffffffff8398bc10 cpu_info_full_primary+0x2c10
r13 0
r14 0
r15 0x1
rip 0xffffffff8261c3b5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a2ebce0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=308681 pid=63359 tcnt=0 stat=onproc
flags process=a<EXEC,EXITING> proc=2000<WEXIT>
runpri=32, usrpri=76, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1
forw=0xffffffffffffffff, list=0xffff80002a22c2a8,0xffff800045ffdca0
process=0xffff800045ff5818 user=0xffff80002a2e7000, vmspace=0xfffff2000b1f7d58
estcpu=26, cpticks=12, pctcpu=0.6, user=0, sys=2, intr=0
ddb{0}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
52605 126754 17799 0 2 0x10100002 0 sh
9808 90690 41509 0 3 0x2 0 clonelk ifconfig
41509 254779 14263 0 3 0x100002 0x88 sigsusp sh
80041 199656 67910 0 7 0 0 syz-executor
80041 73804 67910 0 3 0 0x4000080 ttyin syz-executor
14263 57732 17422 0 3 0x2 0x80 wait syz-executor
68752 329910 93590 0 3 0 0x80 nanoslp syz-executor
68752 319365 93590 0 3 0 0x4000080 fsleep syz-executor
68752 312233 93590 0 3 0 0x4000080 fsleep syz-executor
68752 461715 93590 0 3 0 0x4000080 lockf syz-executor
17799 184986 17422 0 3 0x2 0x80 wait syz-executor
67910 473579 17422 0 3 0x2 0x80 nanoslp syz-executor
36724 126441 17422 0 3 0x2 0x80 piperd syz-executor
93590 503145 17422 0 3 0x2 0x80 nanoslp syz-executor
40430 44147 17422 0 3 0x2 0x80 piperd syz-executor
17422 375653 26603 0 3 0x2 0x80 wait syz-executor
26603 160327 3690 0 3 0x100002 0x88 sigsusp ksh
3690 378646 57710 0 3 0x10 0x88 kqread sshd-session
57710 447381 33180 0 3 0x12 0x80 kqread sshd-session
17177 37313 1 0 3 0x100003 0x80 ttyin getty
33180 367657 1 0 3 0 0x88 kqread sshd
89660 125484 54325 74 3 0x1100012 0x80 bpf pflogd
54325 389314 1 0 3 0 0x80 sbwait pflogd
31109 312075 17210 73 3 0x1100010 0x80 kqread syslogd
17210 116292 1 0 3 0x100002 0x80 sbwait syslogd
31844 506867 1 0 3 0x100000 0x80 kqread resolvd
4862 89590 79157 77 3 0x100012 0x80 kqread dhcpleased
23002 365736 79157 77 3 0x100012 0x80 kqread dhcpleased
79157 181085 1 0 3 0 0x80 kqread dhcpleased
24030 510812 0 0 3 0x14000 0x200 bored smr
63351 463865 0 0 2 0x14000 0x200 zerothread
82321 270470 0 0 3 0x14000 0x200 aiodoned aiodoned
2637 95833 0 0 3 0x14000 0x200 syncer update
98360 310415 0 0 3 0x14000 0x200 cleaner cleaner
8265 6495 0 0 3 0x14000 0x200 reaper reaper
98811 486202 0 0 3 0x14000 0x200 pgdaemon pagedaemon
45393 182235 0 0 3 0x14000 0x200 bored viomb
20386 22788 0 0 3 0x14000 0x40000200 acpi0 acpi0
99061 428143 0 0 3 0x14000 0x40000200 idle1
93699 32162 0 0 3 0x14000 0x200 bored softnet1
77239 390599 0 0 3 0x14000 0x200 bored softnet0
13301 164331 0 0 3 0x14000 0x200 smrbar systqmp
50634 383993 0 0 3 0x14000 0x200 bored systq
53931 345331 0 0 3 0x14000 0x200 tmoslp softclockmp
28367 391197 0 0 3 0x14000 0x40000200 tmoslp softclock
5215 303565 0 0 3 0x14000 0x40000200 idle0
1 309731 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff839a7bb8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 free+0x9f sys/kern/kern_malloc.c:393
#3 rtfree+0x347 sys/net/route.c:641
#4 rt_ifa_purge+0x1a0 sys/net/route.c:1481
#5 in6_unlink_ifa+0x83f sys/netinet6/in6.c:938
#6 in6_ifdetach+0x9e sys/netinet6/in6_ifattach.c:416
#7 if_detach+0x30f sys/net/if.c:1314
#8 tun_clone_destroy+0x2ce sys/net/if_tun.c:343
#9 if_clone_destroy+0x205 sys/net/if.c:1479
#10 tun_dev_close+0x1d9 sys/net/if_tun.c:526
#11 spec_close+0x417 sys/kern/spec_vnops.c:-1
#12 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
#13 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline]
#13 vn_closefile+0x12b sys/kern/vfs_vnops.c:621
#14 fdrop+0x121 sys/kern/kern_descrip.c:1281
#15 closef+0x192 sys/kern/kern_descrip.c:1265
#16 fdfree+0x116 sys/kern/kern_descrip.c:1196
#17 exit1+0x595 sys/kern/kern_exit.c:215
#18 sys_exit+0x1a sys/kern/kern_exit.c:-1
Process 13301 (systqmp) thread 0xffff800045ffe298 (164331)
shared rwlock systqmp r = 0 (0xffffffff838f5ba8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11052 12083K 12158K 166960K 12314 0
pcb 17 12K 12K 166960K 26 0
rtable 222 9K 9K 166960K 631 0
pf 32 17K 21K 166960K 69 0
ifaddr 38 6K 7K 166960K 81 0
ifgroup 51 2K 2K 166960K 92 0
sysctl 3 1K 9K 166960K 8 0
counters 68 36K 37K 166960K 90 0
ioctlops 0 0K 4K 166960K 1501 0
iov 0 0K 16K 166960K 41 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1381 87K 87K 166960K 1725 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 1K 166960K 2 0
VM map 2 1K 1K 166960K 2 0
sem 2 0K 0K 166960K 4 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 15 53K 97K 166960K 325 0
sigio 0 0K 0K 166960K 1 0
proc 78 131K 164K 166960K 792 0
subproc 72 4K 4K 166960K 153 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 1 0K 0K 166960K 15 0
in_multi 83 5K 6K 166960K 189 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 4 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 55 254K 254K 166960K 55 0
exec 0 0K 1K 166960K 503 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 200 160K 167K 166960K 4347 0
UVM aobj 4 2K 2K 166960K 5 0
pinsyscall 40 80K 105K 166960K 1733 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 5 0
NDP 19 1K 2K 166960K 53 0
temp 37 9122K 9142K 166960K 10450 0
kqueue 13 20K 24K 166960K 42 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 28 0 0 1 0 1 1 0 8 0
rtpcb 120 89 0 86 2 0 2 2 0 8 1
rtentry 176 202 0 107 6 0 6 6 0 8 0
unpcb 144 71 0 53 1 0 1 1 0 8 0
syncache 336 5 0 5 1 0 1 1 0 8 1
tcpcb 736 32 0 26 1 0 1 1 0 8 0
arp 136 34 0 20 1 0 1 1 0 8 0
inpcb 328 159 0 149 2 0 2 2 0 8 0
nd6 152 48 0 28 1 0 1 1 0 8 0
pkpcb 40 1 0 1 1 0 1 1 0 8 1
kcovpl 48 17 0 9 1 0 1 1 0 8 0
ppxss 1192 1 0 1 1 0 1 1 0 8 1
pppxif 1576 1 0 1 1 0 1 1 0 8 1
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 2 0 1 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 36 0 0 1 0 1 1 0 8 0
pfstkey 128 36 0 0 2 0 2 2 0 8 0
pfstate 448 36 0 0 4 0 4 4 0 8 0
pfrule 1360 22 0 16 2 0 2 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 822 0 410 29 0 29 29 0 8 1
art_table 40 824 0 410 5 0 5 5 0 8 0
art_node 32 202 0 108 1 0 1 1 0 8 0
shmpl 112 2 0 1 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1696 0 213 93 0 93 93 0 8 0
ffsino 296 1696 0 213 115 0 115 115 0 8 0
nchpl 144 1977 0 247 65 0 65 65 0 8 0
vnodes 216 2128 0 0 119 0 119 119 0 8 0
namei 1024 8148 0 8148 3 1 2 2 0 8 2
percpumem 16 61 0 11 1 0 1 1 0 8 0
kstatmem 264 45 0 20 2 0 2 2 0 8 0
scsiplug 72 1 0 1 1 0 1 1 0 8 1
scxspl 216 6720 0 6720 4 3 1 3 1 8 1
plimitpl 152 184 0 166 1 0 1 1 0 8 0
sigapl 424 636 0 590 7 0 7 7 0 8 1
knotepl 120 275 0 0 9 0 9 9 0 8 0
kqueuepl 224 142 0 132 1 0 1 1 0 8 0
pipepl 344 161 0 134 4 0 4 4 0 8 1
fdescpl 528 620 0 591 3 0 3 3 0 8 0
filepl 160 2476 0 2226 13 0 13 13 0 8 2
lockfpl 104 38 0 34 1 0 1 1 0 8 0
lockfspl 48 17 0 14 1 0 1 1 0 8 0
sessionpl 144 35 0 26 1 0 1 1 0 8 0
pgrppl 48 53 0 36 1 0 1 1 0 8 0
ucredpl 104 187 0 174 1 0 1 1 0 8 0
zombiepl 144 593 0 590 1 0 1 1 0 8 0
processpl 1232 636 0 590 5 0 5 5 0 8 1
procpl 664 780 0 730 6 0 6 6 0 8 1
sockpl 752 325 0 294 7 0 7 7 0 8 3
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl9k128 9344 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 113 0 0 15 0 15 15 0 8 0
mcl2k 2048 16 0 0 2 0 2 2 0 8 0
mextrefs 64 12 0 0 1 0 1 1 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 394 0 0 25 0 25 25 0 8 0
bufpl 272 2451 0 105 157 0 157 157 0 8 0
anonpl 32 7489 0 0 61 0 61 61 0 247 0
amapchunkpl 152 12019 0 11647 22 0 22 22 0 158 5
amappl16 200 1756 0 1741 16 3 13 14 0 8 12
amappl15 192 3 0 3 1 1 0 1 0 8 0
amappl14 184 539 0 536 1 0 1 1 0 8 0
amappl13 176 141 0 129 1 0 1 1 0 8 0
amappl12 168 912 0 885 2 0 2 2 0 8 0
amappl11 160 5 0 5 1 1 0 1 0 8 0
amappl10 152 65 0 50 1 0 1 1 0 8 0
amappl9 144 277 0 277 1 1 0 1 0 8 0
amappl8 136 137 0 134 1 0 1 1 0 8 0
amappl7 128 182 0 168 1 0 1 1 0 8 0
amappl6 120 237 0 233 1 0 1 1 0 8 0
amappl5 112 126 0 116 1 0 1 1 0 8 0
amappl4 104 322 0 304 1 0 1 1 0 8 0
amappl3 96 2158 0 2081 3 0 3 3 0 8 0
amappl2 88 717 0 644 2 0 2 2 0 8 0
amappl1 80 12067 0 11469 15 0 15 15 0 8 2
amappl 88 3436 0 3309 4 0 4 4 0 92 0
uvmvnodes 80 100 0 0 3 0 3 3 0 8 0
dma65536 65536 1 0 1 1 0 1 1 0 8 1
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 128 254 0 254 2 1 1 1 0 8 1
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 4 0 1 1 0 1 1 0 8 0
uaddrrnd 24 620 0 591 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 620 0 591 1 0 1 1 0 8 0
vmmpekpl 168 7080 0 7031 3 0 3 3 0 8 0
vmmpepl 168 49189 0 47495 95 0 95 95 0 357 14
vmsppl 488 619 0 591 5 0 5 5 0 8 0
rwobjpl 80 17168 0 16165 27 0 27 27 0 8 2
pdppl 4096 1247 0 1182 111 36 75 87 0 8 10
pvpl 32 14207 0 0 115 0 115 115 0 265 0
pmappl 256 619 0 591 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 457 0 39 12 0 12 12 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(ffffffff83536012) at panic+0x1e5 sys/kern/subr_prf.c:198
free(ffff800001625380,5,8) at free+0x690 sys/kern/kern_malloc.c:387
rtfree(fffff2006cc5add0) at rtfree+0x347 sys/net/route.c:641
rt_ifa_purge(ffff800001626a00) at rt_ifa_purge+0x1a0 sys/net/route.c:1481
in6_unlink_ifa(ffff800001626a00,ffff80000160a000) at in6_unlink_ifa+0x83f sys/netinet6/in6.c:938
in6_ifdetach(ffff80000160a000) at in6_ifdetach+0x9e sys/netinet6/in6_ifattach.c:416
if_detach(ffff80000160a000) at if_detach+0x30f sys/net/if.c:1314
tun_clone_destroy(ffff80000160a000) at tun_clone_destroy+0x2ce sys/net/if_tun.c:343
if_clone_destroy(ffff80002a2ec0c0) at if_clone_destroy+0x205 sys/net/if.c:1479
tun_dev_close(5d02,7) at tun_dev_close+0x1d9 sys/net/if_tun.c:526
spec_close(ffff80002a2ec180) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffff200783c77c8,7,fffff200097fd2d8,ffff800045ffd9f8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffff2006cecc400,ffff800045ffd9f8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffff2006cecc400,ffff800045ffd9f8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:621
fdrop(fffff2006cecc400,ffff800045ffd9f8) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffff2006cecc400,ffff800045ffd9f8) at closef+0x192 sys/kern/kern_descrip.c:1265
fdfree(ffff800045ffd9f8) at fdfree+0x116 sys/kern/kern_descrip.c:1196
exit1(ffff800045ffd9f8,43,0,1) at exit1+0x595 sys/kern/kern_exit.c:215
sys_exit(ffff800045ffd9f8,ffff80002a2ec4f0,ffff80002a2ec440) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a2ec4f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2ec4f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x785a4b85db70, count: -21
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff80002999dff0) 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
end of kernel
end trace frame: 0x7eaf38001690, count: 12
ddb{1}> trace
x86_ipi_db(ffff80002999dff0) 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
end of kernel
end trace frame: 0x7eaf38001690, count: -3