panic: vpopa_ngiecn:kerericn_elba diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 678
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*273731 84507 32767 0x10 0 1 syz-executor.1
70698 94209 32767 0x10 0 0 syz-executor.6
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8259a81b) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8261357c,ffffffff825d7a31,2a6,ffffffff825cf550) 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/setuid/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(ffffffff8259a81b) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8261357c,ffffffff825d7a31,2a6,ffffffff825cf550) 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 0xffff80002c984370
rbx 0xffff800020ce9c5f
rdx 0
rcx 0
rax 0xffff80002610d510
r8 0x101010101010101
r9 0x8080808080808080
r10 0x1c9a81917b788d3b
r11 0x81b6fc778a0fe6e1
r12 0xffff800020ce9a60
r13 0
r14 0xffffffff8297ea60 cpu_info_full_primary+0x2a60
r15 0x1
rip 0xffffffff81329348 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002c984360
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=273731 stat=onproc
flags process=10<SUGID> proc=0
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff80002610d270,0xffffffff82a204b8
process=0xffff8000246854e0 user=0xffff80002c97f000, vmspace=0xfffffd806fe31b98
estcpu=36, cpticks=2, pctcpu=0.0
user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*84507 273731 48541 32767 7 0x10 syz-executor.1
88934 262567 93778 32767 2 0x10 syz-executor.5
88934 173007 93778 32767 2 0x4000010 syz-executor.5
88934 457135 93778 32767 2 0x4000010 syz-executor.5
22090 510649 65134 32767 2 0x10 syz-executor.3
22090 474333 65134 32767 3 0x4000090 fsleep syz-executor.3
22090 100721 65134 32767 3 0x4000090 fsleep syz-executor.3
22090 12586 65134 32767 3 0x4000090 fsleep syz-executor.3
39452 342935 87899 32767 3 0x90 nanoslp syz-executor.7
39452 181517 87899 32767 3 0x4000090 fsleep syz-executor.7
39452 218971 87899 32767 3 0x4000090 fsleep syz-executor.7
49009 345306 31012 32767 3 0x90 nanoslp syz-executor.0
49009 240705 31012 32767 3 0x4000090 netio syz-executor.0
19358 252589 0 0 3 0x14200 bored sosplice
87899 80351 34433 32767 3 0x90 nanoslp syz-executor.7
65134 389722 16446 32767 3 0x90 nanoslp syz-executor.3
94209 70698 33078 32767 7 0x10 syz-executor.6
58044 380478 17167 32767 2 0x10 syz-executor.4
33078 22773 64267 0 3 0x82 wait syz-executor.6
34433 372901 64267 0 3 0x82 wait syz-executor.7
93778 147894 64604 32767 3 0x90 nanoslp syz-executor.5
64604 166257 64267 0 3 0x82 wait syz-executor.5
17167 271835 64267 0 3 0x82 wait syz-executor.4
16446 486639 64267 0 3 0x82 wait syz-executor.3
85574 38523 86331 32767 2 0x10 syz-executor.2
86331 175289 64267 0 3 0x82 wait syz-executor.2
48541 46347 39665 32767 3 0x90 nanoslp syz-executor.1
39665 281840 64267 0 3 0x82 wait syz-executor.1
31012 391900 97715 32767 3 0x90 nanoslp syz-executor.0
97715 322913 64267 0 3 0x82 wait syz-executor.0
64267 331188 71043 0 3 0x82 thrsleep syz-fuzzer
64267 449518 71043 0 3 0x4000082 nanoslp syz-fuzzer
64267 229271 71043 0 3 0x4000082 thrsleep syz-fuzzer
64267 524126 71043 0 3 0x4000082 thrsleep syz-fuzzer
64267 481886 71043 0 3 0x4000082 thrsleep syz-fuzzer
64267 214116 71043 0 3 0x4000082 thrsleep syz-fuzzer
64267 502999 71043 0 3 0x4000082 thrsleep syz-fuzzer
64267 517191 71043 0 3 0x4000082 thrsleep syz-fuzzer
64267 154750 71043 0 3 0x4000082 thrsleep syz-fuzzer
64267 481197 71043 0 2 0x4000082 syz-fuzzer
71043 363278 30525 0 3 0x10008a sigsusp ksh
30525 12028 13709 0 2 0x9a sshd
26878 14161 1 0 3 0x100083 ttyin getty
13709 274408 1 0 3 0x88 kqread sshd
27480 48501 84757 73 3 0x1100090 kqread syslogd
84757 298002 1 0 3 0x100082 netio syslogd
61840 188763 1 0 3 0x100080 kqread resolvd
90558 475775 42713 77 3 0x100092 kqread dhcpleased
68603 472888 42713 77 3 0x100092 kqread dhcpleased
42713 248551 1 0 3 0x80 kqread dhcpleased
98291 40669 0 0 3 0x14200 bored smr
74146 451292 0 0 3 0x14200 pgzero zerothread
14963 18270 0 0 3 0x14200 aiodoned aiodoned
80484 424734 0 0 3 0x14200 syncer update
39879 345774 0 0 3 0x14200 cleaner cleaner
3981 480144 0 0 3 0x14200 reaper reaper
48119 85807 0 0 3 0x14200 pgdaemon pagedaemon
95668 391651 0 0 3 0x14200 bored viomb
9797 242529 0 0 3 0x40014200 acpi0 acpi0
74173 48435 0 0 3 0x40014200 idle1
67115 235077 0 0 3 0x14200 bored softnet
15451 252510 0 0 3 0x14200 bored softnet
74329 333673 0 0 3 0x14200 bored softnet
70079 247128 0 0 3 0x14200 bored softnet
16472 219459 0 0 3 0x14200 bored systqmp
3256 161115 0 0 3 0x14200 bored systq
20294 71389 0 0 3 0x40014200 bored softclock
85631 95495 0 0 3 0x40014200 idle0
1 343029 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 94209 (syz-executor.6) thread 0xffff8000fffefce0 (70698)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a338a0)
#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:1220
#9 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388
#10 domkdirat+0x121 sys/kern/vfs_syscalls.c:3116
#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 (0xfffffd807326d4e8)
#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:567
#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:1150
#10 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388
#11 domkdirat+0x121 sys/kern/vfs_syscalls.c:3116
#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 (0xfffffd80674582c0)
#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:567
#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:3101
#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
Process 58044 (syz-executor.4) thread 0xffff8000fffedce8 (380478)
exclusive rrwlock inode r = 0 (0xfffffd806e51f700)
#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 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140
#5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347
#6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394
#7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150
#8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388
#9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3116
#10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80674580a0)
#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:567
#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:3101
#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
Process 85574 (syz-executor.2) thread 0xffff8000fffee2a0 (38523)
exclusive rrwlock inode r = 0 (0xfffffd807326d818)
#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:567
#5 vn_closefile+0xc6 vn_close sys/kern/vfs_vnops.c:295 [inline]
#5 vn_closefile+0xc6 sys/kern/vfs_vnops.c:612
#6 fdrop+0xc7 sys/kern/kern_descrip.c:1279
#7 closef+0x11c sys/kern/kern_descrip.c:1263
#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 10204 6412K 6420K 78643K 11296 0
pcb 13 10K 12K 78643K 15 0
rtable 234 6K 7K 78643K 381 0
ifaddr 81 16K 16K 78643K 82 0
sysctl 2 0K 0K 78643K 2 0
counters 56 35K 35K 78643K 56 0
ioctlops 0 0K 2K 78643K 33 0
iov 0 0K 24K 78643K 218 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1270 79K 79K 78643K 1822 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 8 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 64 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 23 85K 117K 78643K 1032 0
sigio 0 0K 0K 78643K 6 0
proc 56 78K 103K 78643K 522 0
subproc 104 6K 6K 78643K 104 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 40 0
in_multi 99 6K 7K 78643K 116 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 223 996K 996K 78643K 223 0
exec 0 0K 2K 78643K 736 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 238 79K 80K 78643K 7717 0
UVM aobj 17 2K 2K 78643K 22 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 31 0
NDP 11 0K 2K 78643K 27 0
temp 123 4722K 4786K 78643K 5662 0
kqueue 12 18K 24K 78643K 85 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 120 188 0 185 4 3 1 3 0 8 0
rtentry 112 111 0 1 4 0 4 4 0 8 0
unpcb 136 675 0 662 10 7 3 6 0 8 2
syncache 296 21 0 21 3 2 1 1 0 8 1
tcpqe 32 2 0 2 1 1 0 1 0 8 0
tcpcb 736 1117 0 1018 34 25 9 16 0 8 0
arp 120 18 0 0 1 0 1 1 0 8 0
inpcb 312 1660 0 1636 31 23 8 11 0 8 6
nd6 48 24 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 452 0 0 29 0 29 29 0 8 0
art_table 32 453 0 0 4 0 4 4 0 8 0
art_node 16 110 0 10 1 0 1 1 0 8 0
sysvmsgpl 40 27 0 3 1 0 1 1 0 8 0
semupl 112 5 0 5 1 1 0 1 0 8 0
semapl 112 62 0 52 1 0 1 1 0 8 0
shmpl 112 19 0 5 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 3095 0 1663 90 0 90 90 0 8 0
ffsino 272 3095 0 1663 96 0 96 96 0 8 0
nchpl 144 4601 0 2929 63 0 63 63 0 8 0
uvmvnodes 80 3208 0 0 66 0 66 66 0 8 0
vnodes 224 3208 0 0 189 0 189 189 0 8 0
namei 1024 15935 0 15933 3 2 1 2 0 8 0
percpumem 16 40 0 0 1 0 1 1 0 8 0
kstatmem 264 22 0 0 2 0 2 2 0 8 0
scxspl 216 17229 0 17229 16 15 1 8 0 8 1
plimitpl 152 117 0 95 2 1 1 2 0 8 0
sigapl 424 1318 0 1266 7 0 7 7 0 8 0
futexpl 64 8920 0 8915 1 0 1 1 0 8 0
knotepl 120 114 0 0 4 0 4 4 0 8 0
kqueuepl 216 344 0 333 9 4 5 5 0 8 4
pipepl 336 343 0 311 10 7 3 6 0 8 0
fdescpl 496 1300 0 1266 7 2 5 6 0 8 0
filepl 152 9835 0 9576 37 21 16 19 0 8 5
lockfpl 104 227 0 225 1 0 1 1 0 8 0
lockfspl 48 56 0 54 1 0 1 1 0 8 0
sessionpl 144 23 0 7 1 0 1 1 0 8 0
pgrppl 48 35 0 19 1 0 1 1 0 8 0
ucredpl 96 2347 0 2329 1 0 1 1 0 8 0
zombiepl 144 1266 0 1266 1 0 1 1 0 8 1
processpl 1064 1318 0 1266 4 0 4 4 0 8 0
procpl 672 3174 0 3105 9 2 7 8 0 8 0
sosppl 168 11 0 11 1 0 1 1 0 8 1
sockpl 480 2549 0 2509 82 68 14 29 0 8 9
mcl64k 65536 8 0 0 1 0 1 1 0 8 0
mcl16k 16384 14 0 0 2 0 2 2 0 8 0
mcl12k 12288 17 0 0 2 0 2 2 0 8 0
mcl9k 9216 5 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 11 0 0 2 0 2 2 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 199 0 0 24 0 24 24 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 365 0 0 22 0 22 22 0 8 0
bufpl 288 6093 0 136 426 0 426 426 0 8 0
anonpl 24 253784 0 241345 131 27 104 107 0 186 6
amapchunkpl 152 21299 0 20703 40 13 27 37 0 158 0
amappl16 200 3397 0 3028 35 2 33 33 0 8 10
amappl15 192 232 0 230 1 0 1 1 0 8 0
amappl14 184 14 0 6 1 0 1 1 0 8 0
amappl13 176 79 0 78 1 0 1 1 0 8 0
amappl12 168 235 0 229 2 1 1 1 0 8 0
amappl11 160 300 0 283 1 0 1 1 0 8 0
amappl10 152 42 0 36 1 0 1 1 0 8 0
amappl9 144 515 0 510 1 0 1 1 0 8 0
amappl8 136 830 0 771 3 0 3 3 0 8 0
amappl7 128 356 0 338 1 0 1 1 0 8 0
amappl6 120 210 0 194 2 0 2 2 0 8 0
amappl5 112 800 0 782 1 0 1 1 0 8 0
amappl4 104 1238 0 1204 2 0 2 2 0 8 0
amappl3 96 3570 0 3513 2 0 2 2 0 8 0
amappl2 88 1600 0 1534 3 0 3 3 0 8 0
amappl1 80 33067 0 32381 20 4 16 19 0 8 0
amappl 88 7255 0 7094 6 1 5 5 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 21 0 5 1 0 1 1 0 8 0
uaddrrnd 24 1300 0 1266 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1300 0 1266 1 0 1 1 0 8 0
vmmpekpl 168 15137 0 15089 3 0 3 3 0 8 0
vmmpepl 168 128598 0 126002 146 8 138 138 0 357 7
vmsppl 368 1299 0 1266 4 0 4 4 0 8 0
rwobjpl 56 36402 0 31834 69 0 69 69 0 8 0
pdppl 4096 2607 0 2532 131 50 81 91 0 8 6
pvpl 32 708863 0 691454 249 65 184 239 0 265 9
pmappl 248 1299 0 1266 4 1 3 3 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 915 0 109 24 0 24 24 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff8297dff0) 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(ffffffff82a33698) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82a33698) at __mp_lock+0x122 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(61) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(61) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff826143de) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff82591714) at panic+0xd7 sys/kern/subr_prf.c:220
vop_generic_badop(ffff80002c366958) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd805ac79020,fffffd807e97f010) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628
bwrite(fffffd807e97f010) at bwrite+0x1f0 sys/kern/vfs_bio.c:763
end trace frame: 0xffff80002c366a40, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff8297dff0) 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(ffffffff82a33698) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82a33698) at __mp_lock+0x122 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(61) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(61) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff826143de) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff82591714) at panic+0xd7 sys/kern/subr_prf.c:220
vop_generic_badop(ffff80002c366958) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd805ac79020,fffffd807e97f010) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628
bwrite(fffffd807e97f010) at bwrite+0x1f0 sys/kern/vfs_bio.c:763
VOP_BWRITE(fffffd807e97f010) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640
ufs_mkdir(ffff80002c366bf0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236
VOP_MKDIR(fffffd806c803ea8,ffff80002c366d50,ffff80002c366d80,ffff80002c366c80) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388
domkdirat(ffff8000fffefce0,ffffff9c,7f7ffffc0860,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3116
syscall(ffff80002c366f00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002c366f00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc08d0, 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(ffffffff8259a81b) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8261357c,ffffffff825d7a31,2a6,ffffffff825cf550) 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(ffffffff8259a81b) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8261357c,ffffffff825d7a31,2a6,ffffffff825cf550) at __assert+0x25 sys/kern/subr_prf.c:161
proc_trampoline_mp() at proc_trampoline_mp+0x131
end trace frame: 0x0, count: -4