panic:p a nic: kernel 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
* 47291 43022 32767 0x10 0x4000000 1 syz-executor.1
441226 6566 32767 0x10 0 0 syz-executor.5
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8259f337) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82611904,ffffffff825db7b5,2a6,ffffffff825cf8d8) 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(ffffffff8259f337) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82611904,ffffffff825db7b5,2a6,ffffffff825cf8d8) 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 0xffff800027b04c80
rbx 0xffff800020ce9c5f
rdx 0
rcx 0
rax 0xffff8000ffff7cf0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x6ed06856edf72e08
r11 0x70c22e0c660a534d
r12 0xffff800020ce9a60
r13 0
r14 0xffffffff8298ca60 cpu_info_full_primary+0x2a60
r15 0x1
rip 0xffffffff81e00b48 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800027b04c70
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=47291 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000260aa010,0xffffffff82b13300
process=0xffff8000fffeba48 user=0xffff800027aff000, vmspace=0xfffffd806c6f9a20
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
22854 247609 12048 32767 2 0x10 syz-executor.6
22854 514947 12048 32767 3 0x4000090 fsleep syz-executor.6
55575 204352 37861 32767 2 0x10 syz-executor.3
55575 227344 37861 32767 3 0x4000090 fsleep syz-executor.3
43022 348751 79389 32767 2 0x10 syz-executor.1
*43022 47291 79389 32767 7 0x4000010 syz-executor.1
12048 79974 70842 32767 3 0x90 nanoslp syz-executor.6
70842 283542 50713 0 3 0x82 wait syz-executor.6
6566 441226 32833 32767 7 0x10 syz-executor.5
32833 293993 50713 0 3 0x82 wait syz-executor.5
12747 291106 47964 32767 3 0x90 nanoslp syz-executor.2
47964 62671 50713 0 3 0x82 wait syz-executor.2
79389 272869 31887 32767 3 0x90 nanoslp syz-executor.1
31887 42592 50713 0 3 0x82 wait syz-executor.1
64292 95582 0 0 3 0x14200 bored sosplice
99096 512144 27114 32767 3 0x90 nanoslp syz-executor.7
64563 499312 16354 32767 3 0x10 biowait syz-executor.4
27114 398661 50713 0 3 0x82 wait syz-executor.7
37861 150100 66231 32767 3 0x90 nanoslp syz-executor.3
16354 389908 50713 0 3 0x82 wait syz-executor.4
66231 309995 50713 0 3 0x82 wait syz-executor.3
1235 134124 71662 32767 3 0x90 nanoslp syz-executor.0
71662 349156 50713 0 3 0x82 wait syz-executor.0
50713 262829 84287 0 3 0x82 thrsleep syz-fuzzer
50713 492386 84287 0 3 0x4000082 nanoslp syz-fuzzer
50713 388181 84287 0 3 0x4000082 kqread syz-fuzzer
50713 295290 84287 0 3 0x4000082 thrsleep syz-fuzzer
50713 277991 84287 0 3 0x4000082 thrsleep syz-fuzzer
50713 236612 84287 0 3 0x4000082 thrsleep syz-fuzzer
50713 111232 84287 0 3 0x4000082 thrsleep syz-fuzzer
50713 401417 84287 0 3 0x4000082 thrsleep syz-fuzzer
50713 212709 84287 0 3 0x4000082 thrsleep syz-fuzzer
84287 491367 80930 0 3 0x10008a sigsusp ksh
80930 163287 7982 0 3 0x9a kqread sshd
27238 79322 1 0 3 0x100083 ttyin getty
7982 401880 1 0 3 0x88 kqread sshd
63303 224751 12513 73 3 0x1100090 kqread syslogd
12513 147031 1 0 3 0x100082 netio syslogd
84938 55350 1 0 3 0x100080 kqread resolvd
12696 513211 40914 77 3 0x100092 kqread dhcpleased
56063 69250 40914 77 3 0x100092 kqread dhcpleased
40914 415037 1 0 3 0x80 kqread dhcpleased
43770 158819 0 0 3 0x14200 bored smr
1589 470969 0 0 2 0x14200 zerothread
94520 443563 0 0 3 0x14200 aiodoned aiodoned
4706 144550 0 0 3 0x14200 syncer update
20880 333806 0 0 3 0x14200 cleaner cleaner
91438 145992 0 0 3 0x14200 reaper reaper
30503 369777 0 0 3 0x14200 pgdaemon pagedaemon
90619 358642 0 0 3 0x14200 bored viomb
76055 490332 0 0 3 0x40014200 acpi0 acpi0
76244 186562 0 0 3 0x40014200 idle1
43359 397653 0 0 3 0x14200 bored softnet
12313 404500 0 0 3 0x14200 bored softnet
39168 492818 0 0 3 0x14200 bored softnet
50747 398811 0 0 3 0x14200 bored softnet
55364 447452 0 0 3 0x14200 bored systqmp
31200 130029 0 0 3 0x14200 bored systq
94338 468216 0 0 3 0x40014200 bored softclock
39746 390229 0 0 3 0x40014200 idle0
1 342535 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 6566 (syz-executor.5) thread 0xffff8000fffecfc8 (441226)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b9e090)
#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 (0xfffffd807ae460a8)
#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 (0xfffffd806e56e2c0)
#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
Process 64563 (syz-executor.4) thread 0xffff8000fffee2a0 (499312)
exclusive rrwlock inode r = 0 (0xfffffd80690eab40)
#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 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561
#11 namei+0x36a sys/kern/vfs_lookup.c:245
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850
#13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80690ea0a0)
#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 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850
#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 11317 0
pcb 13 12K 14K 78643K 17 0
rtable 238 6K 7K 78643K 1107 0
ifaddr 81 17K 17K 78643K 132 0
sysctl 3 1K 1K 78643K 3 0
counters 56 35K 35K 78643K 70 0
ioctlops 0 0K 2K 78643K 51 0
iov 0 0K 28K 78643K 1580 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1271 79K 79K 78643K 2611 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 81 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 1068 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 21 77K 117K 78643K 6849 0
sigio 0 0K 0K 78643K 37 0
proc 56 78K 103K 78643K 1246 0
subproc 104 6K 6K 78643K 195 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 884 0
in_multi 99 6K 6K 78643K 251 0
ether_multi 1 0K 0K 78643K 31 0
mrt 2 0K 0K 78643K 2 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 1822 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 270 90K 108K 78643K 43012 0
UVM aobj 131 4K 4K 78643K 141 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 2403 0
NDP 11 0K 2K 78643K 48 0
temp 124 4730K 4798K 78643K 19511 0
kqueue 12 18K 26K 78643K 781 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 120 855 0 852 15 14 1 4 0 8 0
rtentry 112 193 0 81 4 0 4 4 0 8 0
unpcb 136 5087 0 5074 39 36 3 5 0 8 2
syncache 296 100 0 100 13 12 1 1 0 8 1
sackhl 24 1 0 1 1 1 0 1 0 8 0
tcpqe 32 107 0 107 7 7 0 1 0 8 0
tcpcb 736 2963 0 2957 92 85 7 20 0 8 6
arp 120 33 0 15 1 0 1 1 0 8 0
ipq 40 7 0 7 2 2 0 1 0 8 0
ipqe 40 14 0 14 2 2 0 1 0 8 0
inpcb 312 17737 0 17730 77 70 7 12 0 8 6
ip6q 72 6 0 6 2 2 0 1 0 8 0
ip6af 40 18 0 18 2 2 0 1 0 8 0
nd6 48 49 0 23 1 0 1 1 0 8 0
kcovpl 48 15 0 7 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 775 0 316 29 0 29 29 0 8 0
art_table 32 776 0 316 4 0 4 4 0 8 0
art_node 16 192 0 90 1 0 1 1 0 8 0
sysvmsgpl 40 3 0 0 1 0 1 1 0 8 0
semapl 112 1066 0 1056 1 0 1 1 0 8 0
shmpl 112 138 0 10 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 10616 0 9185 90 0 90 90 0 8 0
ffsino 272 10616 0 9185 96 0 96 96 0 8 0
nchpl 144 20165 0 18526 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 68212 0 68211 4 3 1 2 0 8 0
percpumem 16 47 0 7 1 0 1 1 0 8 0
kstatmem 264 36 0 14 2 0 2 2 0 8 0
scxspl 216 60730 0 60729 26 25 1 8 0 8 0
plimitpl 152 1370 0 1348 2 1 1 2 0 8 0
sigapl 424 7112 0 7059 7 0 7 7 0 8 0
futexpl 64 67383 0 67381 3 2 1 1 0 8 0
knotepl 120 837 0 0 23 0 23 23 0 8 0
kqueuepl 216 2346 0 2338 35 34 1 8 0 8 0
pipepl 336 1871 0 1843 47 39 8 8 0 8 5
fdescpl 496 7094 0 7062 7 1 6 6 0 8 1
filepl 152 58284 0 58050 68 53 15 18 0 8 5
lockfpl 104 1466 0 1464 2 1 1 2 0 8 0
lockfspl 48 376 0 374 1 0 1 1 0 8 0
sessionpl 144 30 0 14 1 0 1 1 0 8 0
pgrppl 48 158 0 142 1 0 1 1 0 8 0
ucredpl 96 7738 0 7720 1 0 1 1 0 8 0
zombiepl 144 7062 0 7059 1 0 1 1 0 8 0
processpl 1064 7112 0 7059 4 0 4 4 0 8 0
procpl 672 20767 0 20703 18 11 7 8 0 8 0
srpgc 96 1 0 1 1 1 0 1 0 8 0
sosppl 168 96 0 96 13 13 0 1 0 8 0
sockpl 480 23998 0 23975 319 308 11 33 0 8 8
mcl64k 65536 28 0 0 3 0 3 3 0 8 0
mcl16k 16384 25 0 0 4 1 3 3 0 8 0
mcl12k 12288 33 0 0 2 0 2 2 0 8 0
mcl9k 9216 19 0 0 2 0 2 2 0 8 0
mcl8k 8192 25 0 0 4 1 3 3 0 8 0
mcl4k 4096 18 0 0 3 0 3 3 0 8 0
mcl2k2 2112 11 0 0 1 0 1 1 0 8 0
mcl2k 2048 181 0 0 18 1 17 18 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 13425 0 0 839 0 839 839 0 8 0
bufpl 288 15201 0 8873 453 0 453 453 0 8 0
anonpl 24 1373622 0 1357697 195 69 126 126 0 186 25
amapchunkpl 152 134091 0 133492 107 71 36 49 0 158 10
amappl16 200 18425 0 17825 91 58 33 46 0 8 0
amappl15 192 1209 0 1203 1 0 1 1 0 8 0
amappl14 184 1771 0 1763 1 0 1 1 0 8 0
amappl13 176 123 0 121 1 0 1 1 0 8 0
amappl12 168 2449 0 2444 2 1 1 1 0 8 0
amappl11 160 1136 0 1118 2 1 1 2 0 8 0
amappl10 152 657 0 651 1 0 1 1 0 8 0
amappl9 144 1227 0 1221 1 0 1 1 0 8 0
amappl8 136 840 0 752 4 0 4 4 0 8 0
amappl7 128 163 0 152 1 0 1 1 0 8 0
amappl6 120 1007 0 983 2 1 1 2 0 8 0
amappl5 112 4731 0 4712 1 0 1 1 0 8 0
amappl4 104 3300 0 3265 2 0 2 2 0 8 0
amappl3 96 23729 0 23679 2 0 2 2 0 8 0
amappl2 88 9323 0 9257 3 1 2 3 0 8 0
amappl1 80 173251 0 172603 23 7 16 19 0 8 0
amappl 88 42135 0 41970 5 0 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 72 140 0 10 3 0 3 3 0 8 0
uaddrrnd 24 7094 0 7062 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 7094 0 7062 1 0 1 1 0 8 0
vmmpekpl 168 62560 0 62515 3 0 3 3 0 8 0
vmmpepl 168 698029 0 695325 200 57 143 143 0 357 8
vmsppl 368 7093 0 7062 4 0 4 4 0 8 0
rwobjpl 56 179549 0 171925 119 7 112 112 0 8 3
pdppl 4096 14195 0 14124 209 128 81 91 0 8 10
pvpl 32 2699964 0 2679268 413 196 217 240 0 265 37
pmappl 248 7093 0 7062 4 1 3 3 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 1979 0 330 48 0 48 48 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff8298bff0) 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(ffffffff82b9de88) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82b9de88) at __mp_lock+0x122 sys/kern/kern_lock.c:147
intr_handler(ffff800027ae36b0,ffff80000004bd00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532
Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f
Xspllower() at Xspllower+0x19
cnputc(20) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(76) at db_putchar+0x34a db_force_whitespace sys/ddb/db_output.c:96 [inline]
db_putchar(76) at db_putchar+0x34a sys/ddb/db_output.c:153
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff826186ee) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff8258fc1c) at panic+0xd7 sys/kern/subr_prf.c:220
vop_generic_badop(ffff800027ae3ad8) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd806a9af9b8,fffffd806a5d3700) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:644
end trace frame: 0xffff800027ae3b80, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff8298bff0) 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(ffffffff82b9de88) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82b9de88) at __mp_lock+0x122 sys/kern/kern_lock.c:147
intr_handler(ffff800027ae36b0,ffff80000004bd00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532
Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f
Xspllower() at Xspllower+0x19
cnputc(20) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(76) at db_putchar+0x34a db_force_whitespace sys/ddb/db_output.c:96 [inline]
db_putchar(76) at db_putchar+0x34a sys/ddb/db_output.c:153
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff826186ee) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff8258fc1c) at panic+0xd7 sys/kern/subr_prf.c:220
vop_generic_badop(ffff800027ae3ad8) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd806a9af9b8,fffffd806a5d3700) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:644
bwrite(fffffd806a5d3700) at bwrite+0x1f0 sys/kern/vfs_bio.c:763
VOP_BWRITE(fffffd806a5d3700) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:656
ufs_mkdir(ffff800027ae3d70) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1248
VOP_MKDIR(fffffd806a88b768,ffff800027ae3ed0,ffff800027ae3f00,ffff800027ae3e00) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
domkdirat(ffff8000fffecfc8,ffffff9c,7f7ffffe8f40,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3101
syscall(ffff800027ae4080) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800027ae4080) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe8fb0, count: -21
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(ffffffff8259f337) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82611904,ffffffff825db7b5,2a6,ffffffff825cf8d8) 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(ffffffff8259f337) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82611904,ffffffff825db7b5,2a6,ffffffff825cf8d8) at __assert+0x25 sys/kern/subr_prf.c:161
proc_trampoline_mp() at proc_trampoline_mp+0x131
end trace frame: 0x0, count: -4