panic: vop_genericp_anbaidc:o p
kStopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
186383 93683 32767 0x10 0x4000000 1 syz-executor.5
*459084 7894 32767 0x10 0 0 syz-executor.2
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82591c2e) at panic+0x177 sys/kern/subr_prf.c:202
vop_generic_badop(ffff8000246b1e48) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd8067ea8b20,fffffd80750ea250) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:644
bwrite(fffffd80750ea250) at bwrite+0x1f0 sys/kern/vfs_bio.c:763
VOP_BWRITE(fffffd80750ea250) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:656
ufs_mkdir(ffff8000246b20e0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1248
VOP_MKDIR(fffffd8078ad9170,ffff8000246b2240,ffff8000246b2270,ffff8000246b2170) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
domkdirat(ffff80002346c7e8,ffffff9c,7f7ffffc83b0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3116
syscall(ffff8000246b23f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246b23f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc8420, count: 4
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: vop_generic_badop
cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 678
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82591c2e) at panic+0x177 sys/kern/subr_prf.c:202
vop_generic_badop(ffff8000246b1e48) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd8067ea8b20,fffffd80750ea250) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:644
bwrite(fffffd80750ea250) at bwrite+0x1f0 sys/kern/vfs_bio.c:763
VOP_BWRITE(fffffd80750ea250) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:656
ufs_mkdir(ffff8000246b20e0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1248
VOP_MKDIR(fffffd8078ad9170,ffff8000246b2240,ffff8000246b2270,ffff8000246b2170) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
domkdirat(ffff80002346c7e8,ffffff9c,7f7ffffc83b0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3116
syscall(ffff8000246b23f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246b23f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc8420, count: -11
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000246b1d70
rbx 0xffffffff8291dc5f cpu_info_full_primary+0x2c5f
rdx 0
rcx 0
rax 0xffff80002346c7e8
r8 0x101010101010101
r9 0x8080808080808080
r10 0x959e7dd67851d63e
r11 0xc0e35f5c6e377693
r12 0xffffffff8291da60 cpu_info_full_primary+0x2a60
r13 0
r14 0
r15 0x1
rip 0xffffffff8109ef08 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000246b1d60
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.2) pid=459084 stat=onproc
flags process=10<SUGID> proc=0
pri=17, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff80002346cfc8,0xffff80002346c558
process=0xffff8000ffff0c88 user=0xffff8000246ad000, vmspace=0xfffffd806c8882f0
estcpu=36, cpticks=2, pctcpu=0.17
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
7484 270775 85042 32767 2 0x10 syz-executor.3
93683 246085 83138 32767 2 0x10 syz-executor.5
93683 294904 83138 32767 2 0x4000010 syz-executor.5
93683 186383 83138 32767 7 0x4000010 syz-executor.5
88645 357520 35030 32767 2 0x10 syz-executor.7
88645 268266 35030 32767 3 0x4000090 fsleep syz-executor.7
88645 6891 35030 32767 3 0x4000090 fsleep syz-executor.7
48268 287497 34065 32767 2 0x490 syz-executor.1
48268 110645 34065 32767 3 0x4000090 fsleep syz-executor.1
48268 180518 34065 32767 3 0x4000090 fsleep syz-executor.1
48268 305830 34065 32767 3 0x4000090 fsleep syz-executor.1
17248 435116 45264 32767 2 0x10 syz-executor.6
17248 178355 45264 32767 2 0x4000010 syz-executor.6
17248 189108 45264 32767 3 0x4000090 kqread syz-executor.6
17248 143458 45264 32767 3 0x4000090 fsleep syz-executor.6
83138 292341 45569 32767 3 0x90 nanoslp syz-executor.5
45569 149352 56847 0 3 0x82 wait syz-executor.5
45264 32413 39042 32767 3 0x90 nanoslp syz-executor.6
39042 463698 56847 0 3 0x82 wait syz-executor.6
35030 6382 25694 32767 3 0x90 nanoslp syz-executor.7
25694 396684 56847 0 3 0x82 wait syz-executor.7
58340 291040 0 0 3 0x14200 bored sosplice
85042 181475 72 32767 2 0x10 syz-executor.3
71524 35089 61216 32767 2 0x10 syz-executor.4
* 7894 459084 6044 32767 7 0x10 syz-executor.2
61216 162046 56847 0 3 0x82 wait syz-executor.4
34065 315045 7905 32767 2 0x490 syz-executor.1
72 419714 56847 0 3 0x82 wait syz-executor.3
6044 32098 56847 0 3 0x82 wait syz-executor.2
7905 490868 56847 0 3 0x82 wait syz-executor.1
56847 47302 49009 0 3 0x82 thrsleep syz-fuzzer
56847 400899 49009 0 3 0x4000082 nanoslp syz-fuzzer
56847 331916 49009 0 3 0x4000082 thrsleep syz-fuzzer
56847 402154 49009 0 3 0x4000082 thrsleep syz-fuzzer
56847 371622 49009 0 3 0x4000082 thrsleep syz-fuzzer
56847 402954 49009 0 3 0x4000082 kqread syz-fuzzer
56847 201869 49009 0 3 0x4000082 thrsleep syz-fuzzer
56847 94313 49009 0 3 0x4000082 thrsleep syz-fuzzer
56847 209199 49009 0 3 0x4000082 thrsleep syz-fuzzer
56847 25064 49009 0 3 0x4000082 thrsleep syz-fuzzer
49009 282802 32876 0 3 0x10008a sigsusp ksh
32876 344657 35586 0 3 0x9a kqread sshd
30059 137972 1 0 3 0x100083 ttyin getty
35586 18492 1 0 3 0x88 kqread sshd
74772 356563 61156 73 3 0x1100090 kqread syslogd
61156 140239 1 0 3 0x100082 netio syslogd
5606 389551 1 0 3 0x100080 kqread resolvd
31186 450794 61302 77 3 0x100092 kqread dhcpleased
64734 307113 61302 77 3 0x100092 kqread dhcpleased
61302 504091 1 0 3 0x80 kqread dhcpleased
62420 37575 0 0 3 0x14200 bored smr
16523 171290 0 0 2 0x14200 zerothread
65935 524284 0 0 3 0x14200 aiodoned aiodoned
88274 161645 0 0 3 0x14200 syncer update
20565 31505 0 0 3 0x14200 cleaner cleaner
23702 194654 0 0 3 0x14200 reaper reaper
21087 477120 0 0 3 0x14200 pgdaemon pagedaemon
60066 451397 0 0 3 0x14200 bored viomb
86723 74165 0 0 3 0x40014200 acpi0 acpi0
28682 105714 0 0 3 0x40014200 idle1
89468 144623 0 0 3 0x14200 bored softnet
96244 247285 0 0 3 0x14200 bored softnet
35968 72379 0 0 3 0x14200 bored softnet
74467 304174 0 0 3 0x14200 bored softnet
74970 152545 0 0 3 0x14200 bored systqmp
44314 501130 0 0 3 0x14200 bored systq
77234 160351 0 0 2 0x40014200 softclock
73288 39111 0 0 3 0x40014200 idle0
1 487849 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 7894 (syz-executor.2) thread 0xffff80002346c7e8 (459084)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a84158)
#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: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 (0xfffffd806c8fdb48)
#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: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 (0xfffffd806c0d6808)
#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: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
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10198 6409K 6420K 78643K 11307 0
pcb 13 12K 14K 78643K 17 0
rtable 218 6K 7K 78643K 631 0
ifaddr 74 16K 17K 78643K 118 0
sysctl 2 0K 0K 78643K 2 0
counters 54 35K 35K 78643K 66 0
ioctlops 0 0K 2K 78643K 59 0
iov 0 0K 20K 78643K 887 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1271 79K 79K 78643K 2169 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 55 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 5348 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 21 77K 113K 78643K 5856 0
sigio 0 0K 0K 78643K 392 0
proc 56 78K 103K 78643K 955 0
subproc 91 5K 6K 78643K 169 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 2597 0
in_multi 88 5K 7K 78643K 216 0
ether_multi 1 0K 0K 78643K 21 0
mrt 1 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 205 917K 917K 78643K 205 0
exec 0 0K 2K 78643K 2388 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 269 76K 97K 78643K 36574 0
UVM aobj 131 4K 4K 78643K 160 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 93 0
NDP 10 0K 2K 78643K 42 0
temp 116 4733K 4862K 78643K 16345 0
kqueue 12 18K 28K 78643K 410 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 120 560 0 557 10 9 1 4 0 8 0
rtentry 112 170 0 68 4 0 4 4 0 8 0
unpcb 136 3035 0 2988 31 29 2 8 0 8 0
syncache 296 67 0 67 13 12 1 1 0 8 1
tcpqe 32 9 0 9 3 3 0 1 0 8 0
tcpcb 736 2205 0 2188 87 78 9 15 0 8 7
arp 120 29 0 13 1 0 1 1 0 8 0
inpcb 312 11368 0 11351 91 82 9 14 0 8 7
ip6q 72 3 0 3 1 1 0 1 0 8 0
ip6af 40 9 0 9 1 1 0 1 0 8 0
nd6 48 42 0 18 1 0 1 1 0 8 0
kcovpl 48 13 0 6 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 699 0 265 30 0 30 30 0 8 2
art_table 32 700 0 265 4 0 4 4 0 8 0
art_node 16 169 0 76 1 0 1 1 0 8 0
sysvmsgpl 40 44 0 4 1 0 1 1 0 8 0
semapl 112 5346 0 5336 1 0 1 1 0 8 0
shmpl 112 157 0 29 5 1 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 8663 0 7225 91 0 91 91 0 8 0
ffsino 272 8663 0 7225 97 0 97 97 0 8 0
nchpl 144 15975 0 14346 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 51419 0 51418 2 1 1 2 0 8 0
percpumem 16 45 0 6 1 0 1 1 0 8 0
kstatmem 264 32 0 12 2 0 2 2 0 8 0
scxspl 216 47027 0 47027 23 22 1 8 0 8 1
plimitpl 152 787 0 767 3 2 1 2 0 8 0
sigapl 424 6125 0 6075 7 0 7 7 0 8 0
futexpl 64 61849 0 61843 1 0 1 1 0 8 0
knotepl 120 600 0 0 12 1 11 11 0 8 0
kqueuepl 216 1645 0 1572 34 29 5 7 0 8 0
pipepl 336 2141 0 2116 54 48 6 8 0 8 3
fdescpl 496 6107 0 6075 7 2 5 6 0 8 0
filepl 152 41074 0 40609 96 78 18 20 0 8 0
lockfpl 104 708 0 706 1 0 1 1 0 8 0
lockfspl 48 194 0 192 1 0 1 1 0 8 0
sessionpl 144 28 0 13 1 0 1 1 0 8 0
pgrppl 48 53 0 38 1 0 1 1 0 8 0
ucredpl 96 5464 0 5447 1 0 1 1 0 8 0
zombiepl 144 6075 0 6075 1 0 1 1 0 8 1
processpl 1064 6125 0 6075 4 0 4 4 0 8 0
procpl 672 17461 0 17392 17 9 8 8 0 8 2
sosppl 168 83 0 83 7 7 0 1 0 8 0
sockpl 480 15204 0 15137 261 250 11 32 0 8 2
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl16k 16384 15 0 0 2 0 2 2 0 8 0
mcl12k 12288 26 0 0 2 0 2 2 0 8 0
mcl9k 9216 17 0 0 2 0 2 2 0 8 0
mcl8k 8192 34 0 0 5 2 3 3 0 8 0
mcl4k 4096 25 0 0 4 1 3 3 0 8 0
mcl2k2 2112 12 0 0 1 0 1 1 0 8 0
mcl2k 2048 206 0 0 20 0 20 20 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 794 0 0 42 0 42 42 0 8 0
bufpl 288 13174 0 6843 453 0 453 453 0 8 0
anonpl 24 1181440 0 1170624 177 81 96 103 0 186 11
amapchunkpl 152 106416 0 105834 62 33 29 37 0 158 0
amappl16 200 16687 0 16344 72 41 31 31 0 8 10
amappl15 192 2097 0 2093 1 0 1 1 0 8 0
amappl14 184 721 0 716 1 0 1 1 0 8 0
amappl13 176 808 0 804 1 0 1 1 0 8 0
amappl12 168 260 0 259 1 0 1 1 0 8 0
amappl11 160 1150 0 1135 1 0 1 1 0 8 0
amappl10 152 56 0 50 1 0 1 1 0 8 0
amappl9 144 544 0 542 1 0 1 1 0 8 0
amappl8 136 1725 0 1629 4 0 4 4 0 8 0
amappl7 128 1071 0 1053 1 0 1 1 0 8 0
amappl6 120 318 0 295 2 1 1 2 0 8 0
amappl5 112 4606 0 4584 1 0 1 1 0 8 0
amappl4 104 3121 0 3097 2 1 1 2 0 8 0
amappl3 96 18695 0 18646 2 0 2 2 0 8 0
amappl2 88 7554 0 7486 3 1 2 3 0 8 0
amappl1 80 148616 0 147958 25 8 17 19 0 8 1
amappl 88 35843 0 35684 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 72 159 0 29 3 0 3 3 0 8 0
uaddrrnd 24 6107 0 6075 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 6107 0 6075 1 0 1 1 0 8 0
vmmpekpl 168 54884 0 54838 3 0 3 3 0 8 0
vmmpepl 168 597702 0 595181 196 66 130 135 0 357 8
vmsppl 368 6106 0 6075 4 0 4 4 0 8 0
rwobjpl 56 154613 0 147242 112 4 108 108 0 8 2
pdppl 4096 12221 0 12150 253 172 81 89 0 8 10
pvpl 32 2306385 0 2291156 349 179 170 255 0 265 16
pmappl 248 6106 0 6075 4 1 3 3 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 1245 0 386 25 0 25 25 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(ffffffff82591c2e) at panic+0x177 sys/kern/subr_prf.c:202
vop_generic_badop(ffff8000246b1e48) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd8067ea8b20,fffffd80750ea250) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:644
bwrite(fffffd80750ea250) at bwrite+0x1f0 sys/kern/vfs_bio.c:763
VOP_BWRITE(fffffd80750ea250) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:656
ufs_mkdir(ffff8000246b20e0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1248
VOP_MKDIR(fffffd8078ad9170,ffff8000246b2240,ffff8000246b2270,ffff8000246b2170) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
domkdirat(ffff80002346c7e8,ffffff9c,7f7ffffc83b0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3116
syscall(ffff8000246b23f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246b23f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc8420, count: -11
ddb{0}> machine ddbcpu 1