panic: vop_geneprianci_c: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 678
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*509902 69147 0 0 0 1 syz-executor.6
487473 44591 0 0x2 0 0 syz-executor.3
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8259d6b7) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82615038,ffffffff825fb9b7,2a6,ffffffff825d4b3f) at __assert+0x25 sys/kern/subr_prf.c:161
proc_trampoline_mp() at proc_trampoline_mp+0x131
end trace frame: 0x0, count: 11
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu0: vop_generic_badop
cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 678
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8259d6b7) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82615038,ffffffff825fb9b7,2a6,ffffffff825d4b3f) at __assert+0x25 sys/kern/subr_prf.c:161
proc_trampoline_mp() at proc_trampoline_mp+0x131
end trace frame: 0x0, count: -4
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002bd38390
rbx 0xffff800020cd9c5f
rdx 0
rcx 0
rax 0xffff80002123cd28
r8 0x101010101010101
r9 0x8080808080808080
r10 0x2915083e460b1456
r11 0x34f877f237ff33c5
r12 0xffff800020cd9a60
r13 0
r14 0xffffffff8294ba60 cpu_info_full_primary+0x2a60
r15 0x1
rip 0xffffffff81fba4f8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002bd38380
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.6) pid=509902 stat=onproc
flags process=0 proc=0
pri=80, usrpri=80, nice=20
forw=0xffffffffffffffff, list=0xffff80002123c008,0xffff8000212042c0
process=0xffff8000fffeba48 user=0xffff80002bd33000, vmspace=0xfffffd807c91b308
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*69147 509902 91748 0 7 0 syz-executor.6
63171 439251 47573 0 2 0 syz-executor.1
69142 123946 42931 60929 2 0x10 syz-executor.2
69142 470600 42931 60929 3 0x4000090 fsleep syz-executor.2
71026 389201 33154 0 2 0 syz-executor.4
71026 227523 33154 0 2 0x4000000 syz-executor.4
71026 227249 33154 0 3 0x4000080 fsleep syz-executor.4
71026 200387 33154 0 2 0x4000000 syz-executor.4
71026 51931 33154 0 2 0x4000000 syz-executor.4
89307 417708 76739 0 3 0x82 nanoslp syz-executor.0
42931 398726 76739 0 3 0x82 nanoslp syz-executor.2
47573 47948 76739 0 3 0x82 nanoslp syz-executor.1
95631 473958 76739 0 2 0x2 syz-executor.7
44591 487473 76739 0 7 0x2 syz-executor.3
33154 486561 76739 0 3 0x82 nanoslp syz-executor.4
91748 204702 76739 0 3 0x82 nanoslp syz-executor.6
55717 294862 0 0 3 0x14200 bored sosplice
76739 240412 70983 0 3 0x82 thrsleep syz-fuzzer
76739 406044 70983 0 3 0x4000082 nanoslp syz-fuzzer
76739 235128 70983 0 3 0x4000082 thrsleep syz-fuzzer
76739 320453 70983 0 3 0x4000082 thrsleep syz-fuzzer
76739 224977 70983 0 3 0x4000082 thrsleep syz-fuzzer
76739 467007 70983 0 3 0x4000082 thrsleep syz-fuzzer
76739 359735 70983 0 2 0x4000082 syz-fuzzer
76739 92816 70983 0 3 0x4000082 thrsleep syz-fuzzer
76739 225649 70983 0 2 0x4000082 syz-fuzzer
70983 458298 9342 0 3 0x10008a sigsusp ksh
9342 240862 52898 0 2 0x9a sshd
47395 393827 1 0 3 0x100083 ttyin getty
52898 216702 1 0 3 0x88 kqread sshd
77654 237892 1464 74 3 0x1100092 bpf pflogd
1464 196101 1 0 3 0x80 netio pflogd
7752 203633 483 73 3 0x1100090 kqread syslogd
483 340262 1 0 3 0x100082 netio syslogd
72783 383742 1 0 3 0x100080 kqread resolvd
98443 272708 67256 77 3 0x100092 kqread dhcpleased
85180 371966 67256 77 3 0x100092 kqread dhcpleased
67256 492697 1 0 3 0x80 kqread dhcpleased
13597 122150 0 0 3 0x14200 bored smr
87031 185962 0 0 2 0x14200 zerothread
56646 91720 0 0 3 0x14200 aiodoned aiodoned
14994 330738 0 0 3 0x14200 syncer update
23855 219269 0 0 3 0x14200 cleaner cleaner
95447 70564 0 0 3 0x14200 reaper reaper
23194 229463 0 0 3 0x14200 pgdaemon pagedaemon
85779 166292 0 0 3 0x14200 bored viomb
50000 89259 0 0 3 0x40014200 acpi0 acpi0
26123 264672 0 0 3 0x40014200 idle1
17322 95595 0 0 3 0x14200 bored softnet
72557 160295 0 0 3 0x14200 bored softnet
82164 251832 0 0 3 0x14200 bored softnet
5932 172189 0 0 3 0x14200 bored softnet
46250 400707 0 0 3 0x14200 bored systqmp
47510 101337 0 0 3 0x14200 bored systq
31311 148089 0 0 3 0x40014200 bored softclock
51692 265946 0 0 3 0x40014200 idle0
1 440299 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 44591 (syz-executor.3) thread 0xffff80002123d7a8 (487473)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b741b8)
#0 witness_lock+0x44d
#1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x180 sys/kern/kern_synch.c:420
#4 tsleep+0x12c sys/kern/kern_synch.c:158
#5 biowait+0x91 sys/kern/vfs_bio.c:1271
#6 bwrite+0x21b sys/kern/vfs_bio.c:772
#7 ffs_update+0x27d sys/ufs/ffs/ffs_inode.c:113
#8 ufs_mkdir+0x662 sys/ufs/ufs/ufs_vnops.c:1232
#9 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
#10 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101
#11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#12 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80640165e8)
#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:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vget+0x1d3 sys/kern/vfs_subr.c:678
#6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318
#8 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394
#9 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#10 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
#11 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101
#12 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd8067510e70)
#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:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413
#6 namei+0x36a sys/kern/vfs_lookup.c:245
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086
#8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10207 6559K 7142K 78643K 31287 0
pcb 13 14K 16K 78643K 1244 0
rtable 225 22K 24K 78643K 2149 0
ifaddr 89 20K 21K 78643K 1148 0
sysctl 2 0K 0K 78643K 4 0
counters 54 35K 36K 78643K 264 0
ioctlops 0 0K 8K 78643K 5876 0
iov 0 0K 16K 78643K 1022 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1446 90K 91K 78643K 7487 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 85 0
VM map 2 1K 1K 78643K 2 0
sem 21 5K 10K 78643K 682 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 13 45K 85K 78643K 8325 0
sigio 0 0K 0K 78643K 43 0
proc 70 91K 128K 78643K 1909 0
subproc 91 5K 7K 78643K 598 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 707 0
in_multi 67 4K 6K 78643K 729 0
ether_multi 1 0K 0K 78643K 58 0
mrt 1 0K 0K 78643K 54 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 175 784K 784K 78643K 175 0
exec 0 0K 2K 78643K 2358 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 7 26K 26K 78643K 7 0
UVM amap 352 341K 357K 78643K 50195 0
UVM aobj 131 7K 7K 78643K 137 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 359 0
NDP 12 0K 2K 78643K 217 0
temp 179 4838K 21119K 78643K 70694 0
kqueue 13 20K 24K 78643K 549 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> 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 120 420 0 417 5 4 1 3 0 8 0
rtentry 112 660 0 577 5 2 3 4 0 8 0
unpcb 136 5742 0 5725 55 53 2 6 0 8 1
syncache 296 22 0 22 6 6 0 1 0 8 0
tcpqe 32 4 0 4 2 2 0 1 0 8 0
tcpcb 736 2198 0 2191 77 68 9 14 0 8 7
arp 120 115 0 96 1 0 1 1 0 8 0
inpcb 312 14781 0 14772 89 82 7 11 0 8 5
nd6 48 154 0 140 1 0 1 1 0 8 0
pkpcb 40 16 0 16 4 4 0 1 0 8 0
kcovpl 48 46 0 39 1 0 1 1 0 8 0
ppxss 1248 24 0 24 5 5 0 1 0 8 0
pfstscr 40 6 0 6 2 2 0 1 0 8 0
pffrag 232 26 0 25 3 2 1 1 0 482 0
pffrnode 88 26 0 25 3 2 1 1 0 8 0
pffrent 40 236 0 235 4 3 1 1 0 8 0
pfosfp 40 1428 0 1428 5 0 5 5 0 8 5
pfosfpen 112 1428 0 1428 21 0 21 21 0 8 21
pfrktable 1344 119 0 103 4 2 2 2 0 8 0
pftag 88 11 0 9 3 2 1 1 0 8 0
pfstitem 24 46 0 44 1 0 1 1 0 8 0
pfstkey 112 59 0 57 1 0 1 1 0 8 0
pfstate 336 53 0 51 3 2 1 3 0 8 0
pfsrctr 152 29 0 29 2 2 0 1 0 8 0
pfrule 1360 406 0 347 7 2 5 5 0 8 0
rttmr 64 12 0 12 3 3 0 1 0 8 0
art_heap8 4096 2 0 1 2 1 1 2 0 8 0
art_heap4 256 2940 0 2611 42 17 25 30 0 8 1
art_table 32 2942 0 2612 4 0 4 4 0 8 1
art_node 16 659 0 585 1 0 1 1 0 8 0
sysvmsgpl 40 79 0 39 1 0 1 1 0 8 0
semupl 112 4 0 4 2 2 0 1 0 8 0
semapl 112 672 0 653 1 0 1 1 0 8 0
shmpl 112 134 0 6 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 12262 0 10805 92 0 92 92 0 8 0
ffsino 272 12262 0 10805 98 0 98 98 0 8 0
nchpl 144 22999 0 21360 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 84390 0 84389 6 5 1 2 0 8 0
percpumem 16 144 0 105 1 0 1 1 0 8 0
vcpupl 2048 18 0 0 3 0 3 3 0 8 0
vmpool 560 23 0 5 2 0 2 2 0 8 0
pfiaddrpl 120 80 0 30 3 1 2 2 0 8 0
kstatmem 264 234 0 210 4 2 2 3 0 8 0
scsiplug 72 2 0 2 1 1 0 1 0 8 0
scxspl 216 63383 0 63383 18 17 1 8 0 8 1
plimitpl 152 1118 0 1104 1 0 1 1 0 8 0
sigapl 424 8576 0 8531 10 3 7 8 0 8 0
futexpl 64 70981 0 70979 1 0 1 1 0 8 0
knotepl 120 533 0 0 10 1 9 9 0 8 0
kqueuepl 216 1655 0 1646 27 26 1 5 0 8 0
pipepl 336 1810 0 1785 47 44 3 8 0 8 0
fdescpl 496 8537 0 8511 5 1 4 5 0 8 0
filepl 152 63649 0 63428 83 68 15 20 0 8 5
lockfpl 104 2318 0 2304 4 3 1 2 0 8 0
lockfspl 48 604 0 592 1 0 1 1 0 8 0
sessionpl 144 62 0 46 1 0 1 1 0 8 0
pgrppl 48 736 0 720 1 0 1 1 0 8 0
ucredpl 96 7975 0 7960 1 0 1 1 0 8 0
zombiepl 144 8532 0 8531 2 1 1 1 0 8 0
processpl 1064 8576 0 8531 5 1 4 5 0 8 0
procpl 672 23397 0 23339 19 12 7 9 0 8 1
srpgc 96 73 0 73 12 12 0 1 0 8 0
sosppl 168 25 0 25 7 7 0 1 0 8 0
sockpl 480 20969 0 20940 312 300 12 29 0 8 7
mcl64k 65536 22 0 0 3 0 3 3 0 8 0
mcl16k 16384 17 0 0 3 0 3 3 0 8 0
mcl12k 12288 18 0 0 2 0 2 2 0 8 0
mcl9k 9216 24 0 0 2 0 2 2 0 8 0
mcl8k 8192 21 0 0 3 1 2 3 0 8 0
mcl4k 4096 33 0 0 4 1 3 3 0 8 0
mcl2k2 2112 17 0 0 2 0 2 2 0 8 0
mcl2k 2048 448 0 0 36 0 36 36 0 8 0
mtagpl 96 698 0 0 14 0 14 14 0 8 0
mbufpl 256 1172 0 0 59 0 59 59 0 8 0
bufpl 288 15211 0 8876 453 0 453 453 0 8 0
anonpl 24 1662662 0 1648115 202 66 136 136 0 186 17
amapchunkpl 152 143860 0 143199 70 38 32 37 0 158 2
amappl16 200 23701 0 23091 122 79 43 46 0 8 8
amappl15 192 1066 0 1062 1 0 1 1 0 8 0
amappl14 184 677 0 674 1 0 1 1 0 8 0
amappl13 176 1203 0 1202 1 0 1 1 0 8 0
amappl12 168 673 0 668 2 1 1 1 0 8 0
amappl11 160 2064 0 2043 2 0 2 2 0 8 0
amappl10 152 1072 0 1063 1 0 1 1 0 8 0
amappl9 144 1651 0 1644 1 0 1 1 0 8 0
amappl8 136 1891 0 1794 4 0 4 4 0 8 0
amappl7 128 771 0 759 1 0 1 1 0 8 0
amappl6 120 1644 0 1617 2 1 1 2 0 8 0
amappl5 112 8348 0 8330 1 0 1 1 0 8 0
amappl4 104 3826 0 3795 2 1 1 2 0 8 0
amappl3 96 25205 0 25164 2 0 2 2 0 8 0
amappl2 88 10569 0 10512 3 1 2 3 0 8 0
amappl1 80 202448 0 201866 21 6 15 20 0 8 0
amappl 88 48914 0 48727 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 72 136 0 6 3 0 3 3 0 8 0
uaddrrnd 24 8560 0 8516 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 8560 0 8516 1 0 1 1 0 8 0
vmmpekpl 168 69312 0 69265 3 0 3 3 0 8 0
vmmpepl 168 840488 0 838040 235 97 138 153 0 357 8
vmsppl 368 8559 0 8516 6 1 5 5 0 8 0
rwobjpl 56 209436 0 201755 119 5 114 114 0 8 0
pdppl 4096 17127 0 17050 486 399 87 87 0 8 10
pvpl 32 3280079 0 3261353 418 198 220 257 0 265 27
pmappl 248 8559 0 8516 5 1 4 4 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 1525 0 625 26 0 26 26 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff8294aff0) 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
__mp_lock(ffffffff82b73fb0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82b73fb0) at __mp_lock+0x129 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x1f
cnputc(5f) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(5f) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff82617768) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff82592d16) at panic+0xd7 sys/kern/subr_prf.c:220
vop_generic_badop(ffff80002e40a8d8) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd806d696930,fffffd807086bc98) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:644
bwrite(fffffd807086bc98) at bwrite+0x1f0 sys/kern/vfs_bio.c:763
end trace frame: 0xffff80002e40a9c0, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff8294aff0) 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
__mp_lock(ffffffff82b73fb0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82b73fb0) at __mp_lock+0x129 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x1f
cnputc(5f) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(5f) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff82617768) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff82592d16) at panic+0xd7 sys/kern/subr_prf.c:220
vop_generic_badop(ffff80002e40a8d8) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd806d696930,fffffd807086bc98) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:644
bwrite(fffffd807086bc98) at bwrite+0x1f0 sys/kern/vfs_bio.c:763
VOP_BWRITE(fffffd807086bc98) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:656
ufs_mkdir(ffff80002e40ab70) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1248
VOP_MKDIR(fffffd80700d6ac8,ffff80002e40acd0,ffff80002e40ad00,ffff80002e40ac00) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
domkdirat(ffff80002123d7a8,ffffff9c,7f7ffffc7200,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3101
syscall(ffff80002e40ae80) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002e40ae80) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc7270, count: -20
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x18: addq $0x8,%rsp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8259d6b7) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82615038,ffffffff825fb9b7,2a6,ffffffff825d4b3f) at __assert+0x25 sys/kern/subr_prf.c:161
proc_trampoline_mp() at proc_trampoline_mp+0x131
end trace frame: 0x0, count: 11
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8259d6b7) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82615038,ffffffff825fb9b7,2a6,ffffffff825d4b3f) at __assert+0x25 sys/kern/subr_prf.c:161
proc_trampoline_mp() at proc_trampoline_mp+0x131
end trace frame: 0x0, count: -4