login: panic: vndioctl: null vp
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
393320 80133 0 0 0x4000000 1 syz-executor1231
*140312 70460 0 0 0x4000000 0K syz-executor1231
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff824a2454) at panic+0x177 sys/kern/subr_prf.c:202
vndsetcred(2902,80384601,ffff80002123c3a0,1) at vndsetcred
VOP_IOCTL(fffffd806e4f4ae8,80384601,ffff80002123c3a0,1,fffffd807f7d7660,ffff800021193268) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806e587568,80384601,ffff80002123c3a0,ffff800021193268) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800021193268,ffff80002123c4b8,ffff80002123c510) at sys_ioctl+0x4a2
syscall(ffff80002123c580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002123c580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x171d74be4e0, count: 7
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: vndioctl: null vp
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff824a2454) at panic+0x177 sys/kern/subr_prf.c:202
vndsetcred(2902,80384601,ffff80002123c3a0,1) at vndsetcred
VOP_IOCTL(fffffd806e4f4ae8,80384601,ffff80002123c3a0,1,fffffd807f7d7660,ffff800021193268) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806e587568,80384601,ffff80002123c3a0,ffff800021193268) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800021193268,ffff80002123c4b8,ffff80002123c510) at sys_ioctl+0x4a2
syscall(ffff80002123c580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002123c580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x171d74be4e0, count: -8
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002123bae0
rbx 0xffffffff827e3bff cpu_info_full_primary+0x2bff
rdx 0x8b
rcx 0x2
rax 0x19
r8 0xffffffff817eb474 kprintf+0x144
r9 0x1
r10 0x8ed20437e8388a88
r11 0xc0887af3ae9824e6
r12 0xffffffff827e3a00 cpu_info_full_primary+0x2a00
r13 0
r14 0
r15 0x1
rip 0xffffffff81552b08 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002123bad0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor1231) pid=140312 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=58, nice=20
forw=0xffffffffffffffff, list=0xffff8000211927e8,0xffff800021193518
process=0xffff8000211f1900 user=0xffff800021237000, vmspace=0xfffffd8008582000
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
80133 211500 53238 0 3 0x80 nanoslp syz-executor1231
80133 393320 53238 0 7 0x4000000 syz-executor1231
80133 184629 53238 0 3 0x4000080 fsleep syz-executor1231
70460 308449 31436 0 3 0x80 nanoslp syz-executor1231
*70460 140312 31436 0 7 0x4000000 syz-executor1231
70460 40575 31436 0 3 0x4000080 fsleep syz-executor1231
53238 318563 57233 0 3 0x80 nanoslp syz-executor1231
31436 102970 57233 0 3 0x80 nanoslp syz-executor1231
57233 281650 71399 0 3 0x82 nanoslp syz-executor1231
71399 282405 54364 0 3 0x10008a sigsusp ksh
54364 172014 51591 0 3 0x9a kqread sshd
69143 98391 1 0 3 0x100083 ttyin getty
51591 209388 1 0 3 0x88 kqread sshd
91055 118854 37160 74 3 0x100092 bpf pflogd
37160 195490 1 0 3 0x80 netio pflogd
59269 489417 78538 73 3 0x100090 kqread syslogd
78538 50481 1 0 3 0x100082 netio syslogd
93138 356985 1 0 3 0x100080 kqread resolvd
74073 150888 46366 77 3 0x100092 kqread dhcpleased
52979 301027 46366 77 3 0x100092 kqread dhcpleased
46366 9037 1 0 3 0x80 kqread dhcpleased
41215 466177 0 0 3 0x14200 bored smr
2980 391234 0 0 3 0x14200 pgzero zerothread
23823 273219 0 0 3 0x14200 aiodoned aiodoned
79095 103314 0 0 3 0x14200 syncer update
28809 260796 0 0 3 0x14200 cleaner cleaner
92625 216351 0 0 3 0x14200 reaper reaper
51428 347553 0 0 3 0x14200 pgdaemon pagedaemon
47197 261302 0 0 3 0x14200 bored viomb
20766 49142 0 0 3 0x40014200 acpi0 acpi0
2523 303346 0 0 3 0x40014200 idle1
11284 148528 0 0 3 0x14200 bored softnet
72783 13181 0 0 3 0x14200 bored systqmp
95706 238264 0 0 3 0x14200 bored systq
38795 301691 0 0 3 0x40014200 bored softclock
79495 18343 0 0 3 0x40014200 idle0
1 135028 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 80133 (syz-executor1231) thread 0xffff800021193508 (393320)
exclusive rwlock futex r = 0 (0xffffffff827e4980)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 sys_futex+0x5c sys/kern/sys_futex.c:108
#2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#3 Xsyscall+0x128
Process 70460 (syz-executor1231) thread 0xffff800021193268 (140312)
exclusive rwlock dklk r = 0 (0xffff8000006ac068)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310
#2 vndioctl+0x4f1 sys/dev/vnd.c:538
#3 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
#4 vn_ioctl+0xba sys/kern/vfs_vnops.c:531
#5 sys_ioctl+0x4a2
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828ba480)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433
#4 rw_enter+0x35b sys/kern/kern_rwlock.c:286
#5 vndioctl+0x4f1 sys/dev/vnd.c:538
#6 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
#7 vn_ioctl+0xba sys/kern/vfs_vnops.c:531
#8 sys_ioctl+0x4a2
#9 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#10 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10109 6415K 6416K 78643K 11429 0
pcb 13 8K 8K 78643K 13 0
rtable 62 2K 2K 78643K 118 0
ifaddr 29 8K 8K 78643K 30 0
counters 40 33K 33K 78643K 40 0
ioctlops 0 0K 4K 78643K 1479 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1183 74K 75K 78643K 1189 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 2 0K 0K 78643K 2 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 1 0K 0K 78643K 1 0
proc 67 87K 87K 78643K 278 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 11 0K 0K 78643K 11 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 19 95K 95K 78643K 19 0
exec 0 0K 2K 78643K 368 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 114 4K 6K 78643K 7447 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 4 0K 0K 78643K 4 0
temp 23 4181K 4245K 78643K 3377 0
kqueue 11 16K 16K 78643K 20 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 20 0 17 1 0 1 1 0 8 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 128 35 0 20 1 0 1 1 0 8 0
syncache 296 5 0 5 2 2 0 1 0 8 0
tcpcb 736 8 0 5 1 0 1 1 0 8 0
arp 120 2 0 0 1 0 1 1 0 8 0
inpcb 304 32 0 26 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 8 0 2 1 0 1 1 0 8 0
pfstkey 112 8 0 2 1 0 1 1 0 8 0
pfstate 320 8 0 2 1 0 1 1 0 8 0
pfrule 1360 21 0 15 2 0 2 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 97 0 0 7 0 7 7 0 8 0
art_table 32 98 0 0 1 0 1 1 0 8 0
art_node 16 22 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2301 0 905 88 0 88 88 0 8 0
ffsino 272 2301 0 905 94 0 94 94 0 8 0
nchpl 144 3361 0 1806 58 0 58 58 0 8 0
uvmvnodes 72 2312 0 0 43 0 43 43 0 8 0
vnodes 224 2312 0 0 136 0 136 136 0 8 0
namei 1024 8414 0 8414 2 1 1 1 0 8 1
percpumem 16 32 0 0 1 0 1 1 0 8 0
scxspl 216 9065 0 9065 11 10 1 8 0 8 1
plimitpl 152 16 0 9 1 0 1 1 0 8 0
sigapl 424 708 0 675 4 0 4 4 0 8 0
futexpl 64 1634 0 1631 1 0 1 1 0 8 0
knotepl 112 36 0 0 2 0 2 2 0 8 0
kqueuepl 216 16 0 9 1 0 1 1 0 8 0
pipepl 336 72 0 69 2 1 1 1 0 8 0
fdescpl 496 694 0 675 3 0 3 3 0 8 0
filepl 152 2427 0 2365 3 0 3 3 0 8 0
lockfpl 104 6 0 4 1 0 1 1 0 8 0
lockfspl 48 4 0 2 1 0 1 1 0 8 0
sessionpl 144 18 0 9 1 0 1 1 0 8 0
pgrppl 48 18 0 9 1 0 1 1 0 8 0
ucredpl 96 299 0 287 1 0 1 1 0 8 0
zombiepl 144 675 0 675 2 1 1 1 0 8 1
processpl 1064 708 0 675 3 0 3 3 0 8 0
procpl 672 2000 0 1963 4 0 4 4 0 8 0
sockpl 480 87 0 63 5 1 4 4 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 75 0 0 10 0 10 10 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 140 0 0 8 0 8 8 0 8 0
bufpl 280 3131 0 92 218 0 218 218 0 8 0
anonpl 24 116335 0 113486 21 3 18 18 0 186 0
amapchunkpl 152 15686 0 15474 10 1 9 9 0 158 0
amappl16 200 473 0 469 2 1 1 1 0 8 0
amappl15 192 70 0 67 1 0 1 1 0 8 0
amappl13 176 18 0 17 2 1 1 1 0 8 0
amappl12 168 3 0 3 1 1 0 1 0 8 0
amappl11 160 59 0 42 1 0 1 1 0 8 0
amappl10 152 10 0 7 1 0 1 1 0 8 0
amappl9 144 230 0 228 1 0 1 1 0 8 0
amappl8 136 295 0 290 1 0 1 1 0 8 0
amappl7 128 33 0 32 1 0 1 1 0 8 0
amappl6 120 35 0 31 1 0 1 1 0 8 0
amappl5 112 213 0 195 1 0 1 1 0 8 0
amappl4 104 987 0 964 1 0 1 1 0 8 0
amappl3 96 602 0 585 1 0 1 1 0 8 0
amappl2 88 308 0 276 1 0 1 1 0 8 0
amappl1 80 14216 0 13798 11 2 9 9 0 8 0
amappl 88 7189 0 7094 3 0 3 3 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 64 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 694 0 675 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 694 0 675 1 0 1 1 0 8 0
vmmpekpl 168 9834 0 9820 1 0 1 1 0 8 0
vmmpepl 168 53073 0 52042 50 4 46 46 0 357 1
vmsppl 368 693 0 675 2 0 2 2 0 8 0
rwobjpl 56 15214 0 14618 11 2 9 9 0 8 0
pdppl 4096 1396 0 1350 72 26 46 46 0 8 0
pvpl 32 245590 0 240701 47 6 41 41 0 265 1
pmappl 224 693 0 675 2 0 2 2 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 297 0 30 8 0 8 8 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:440
panic(ffffffff824a2454) at panic+0x177 sys/kern/subr_prf.c:202
vndsetcred(2902,80384601,ffff80002123c3a0,1) at vndsetcred
VOP_IOCTL(fffffd806e4f4ae8,80384601,ffff80002123c3a0,1,fffffd807f7d7660,ffff800021193268) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806e587568,80384601,ffff80002123c3a0,ffff800021193268) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800021193268,ffff80002123c4b8,ffff80002123c510) at sys_ioctl+0x4a2
syscall(ffff80002123c580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002123c580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x171d74be4e0, count: -8
ddb{0}>