login: panic: vputonfreelist: lock count is not zero
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
195858 20127 0 0 0 1 syz-executor8348
* 73242 45679 0 0 0x4000000 0K syz-executor8348
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8226d206) at panic+0x15c sys/kern/subr_prf.c:207
vputonfreelist(fffffd8079c16840) at vputonfreelist+0x139 sys/kern/vfs_subr.c:711
vn_closefile(fffffd806dbb5d20,ffff800020ae7ae8) at vn_closefile+0xe2 sys/kern/vfs_vnops.c:615
fdrop(fffffd806dbb5d20,ffff800020ae7ae8) at fdrop+0xc2 sys/kern/kern_descrip.c:1276
sys_ftruncate(ffff800020ae7ae8,ffff800020b75018,ffff800020b75060) at sys_ftruncate+0x21f sys/kern/vfs_syscalls.c:2860
syscall(ffff800020b750e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020b750e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd463dd4a710, 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
vputonfreelist: lock count is not zero
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8226d206) at panic+0x15c sys/kern/subr_prf.c:207
vputonfreelist(fffffd8079c16840) at vputonfreelist+0x139 sys/kern/vfs_subr.c:711
vn_closefile(fffffd806dbb5d20,ffff800020ae7ae8) at vn_closefile+0xe2 sys/kern/vfs_vnops.c:615
fdrop(fffffd806dbb5d20,ffff800020ae7ae8) at fdrop+0xc2 sys/kern/kern_descrip.c:1276
sys_ftruncate(ffff800020ae7ae8,ffff800020b75018,ffff800020b75060) at sys_ftruncate+0x21f sys/kern/vfs_syscalls.c:2860
syscall(ffff800020b750e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020b750e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd463dd4a710, count: -8
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020b74d80
rbx 0xffff800020b74e30
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff81fb607f kprintf+0x16f
r9 0x1
r10 0xbe2ecbc765fae2bb
r11 0xbaa3ab3fcc213999
r12 0x3000000008
r13 0xffff800020b74d90
r14 0x100
r15 0x1
rip 0xffffffff8219a9e8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020b74d70
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor8348) pid=73242 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=17, usrpri=60, nice=20
forw=0xffffffffffffffff, list=0xffff800020ae6768,0xffff800020ae6298
process=0xffff800020a9d2e0 user=0xffff800020b70000, vmspace=0xfffffd807f000cf0
estcpu=10, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
20127 195858 90740 0 7 0 syz-executor8348
20127 207563 90740 0 3 0x4000080 poll syz-executor8348
45679 485053 91033 0 3 0x80 nanosleep syz-executor8348
45679 355269 91033 0 2 0x4000000 syz-executor8348
45679 153576 91033 0 3 0x4000080 poll syz-executor8348
*45679 73242 91033 0 7 0x4000000 syz-executor8348
45679 239103 91033 0 3 0x4000080 fsleep syz-executor8348
91033 476555 56905 0 3 0x80 nanosleep syz-executor8348
90740 473515 56905 0 3 0x80 nanosleep syz-executor8348
56905 433568 3835 0 3 0x82 nanosleep syz-executor8348
3835 46644 48727 0 3 0x10008a pause ksh
48727 417836 60741 0 3 0x92 select sshd
94830 169206 1 0 3 0x100083 ttyin getty
60741 120297 1 0 3 0x80 select sshd
21999 357243 35443 74 3 0x100092 bpf pflogd
35443 207008 1 0 3 0x80 netio pflogd
68076 381186 10922 73 3 0x100090 kqread syslogd
10922 321445 1 0 3 0x100082 netio syslogd
206 213009 1 77 3 0x100090 poll dhclient
97635 351294 1 0 3 0x80 poll dhclient
18033 156044 0 0 3 0x14200 bored smr
26697 344571 0 0 3 0x14200 pgzero zerothread
50004 325788 0 0 3 0x14200 aiodoned aiodoned
16888 42834 0 0 3 0x14200 syncer update
49430 449639 0 0 3 0x14200 cleaner cleaner
1157 487162 0 0 3 0x14200 reaper reaper
99249 435812 0 0 3 0x14200 pgdaemon pagedaemon
21773 474466 0 0 3 0x14200 bored crynlk
33474 499476 0 0 3 0x14200 bored crypto
30713 511756 0 0 3 0x40014200 acpi0 acpi0
99636 390416 0 0 3 0x40014200 idle1
20609 262663 0 0 3 0x14200 bored softnet
33589 377415 0 0 3 0x14200 bored systqmp
10141 160496 0 0 3 0x14200 bored systq
89076 196263 0 0 3 0x40014200 bored softclock
99376 465301 0 0 3 0x40014200 idle0
1 99157 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 45679 (syz-executor8348) thread 0xffff800020ae7ae8 (73242)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82641eb8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:415
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:444 [inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:206
#5 tsleep+0x1cc sys/kern/kern_synch.c:155
#6 biowait+0xa6 sys/kern/vfs_bio.c:1255
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:765
#8 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#9 ffs_truncate+0x285
#10 ufs_setattr+0x6b0 sys/ufs/ufs/ufs_vnops.c:408
#11 VOP_SETATTR+0xc6 sys/kern/vfs_vops.c:229
#12 sys_ftruncate+0x1e0 sys/kern/vfs_syscalls.c:2856
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9462 6393K 6394K 78643K 10553 0
pcb 13 8K 8K 78643K 13 0
rtable 61 2K 2K 78643K 127 0
ifaddr 29 8K 8K 78643K 30 0
counters 39 33K 33K 78643K 39 0
ioctlops 0 0K 4K 78643K 1467 0
iov 0 0K 12K 78643K 686 0
mount 1 1K 1K 78643K 1 0
vnodes 1183 74K 75K 78643K 1188 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 1809 196K 290K 78643K 12766 0
file desc 1 0K 0K 78643K 1 0
proc 59 63K 71K 78643K 358 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 1K 78643K 177 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 70 3K 12K 78643K 2636 0
UVM aobj 2 2K 2K 78643K 2 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 4 0K 0K 78643K 4 0
temp 24 3009K 3073K 78643K 1666 0
kqueue 2 2K 2K 78643K 2 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
arp 64 2 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 15 0 13 1 0 1 1 0 8 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 120 29 0 19 1 0 1 1 0 8 0
syncache 264 5 0 5 2 2 0 1 0 8 0
tcpcb 544 8 0 5 1 0 1 1 0 8 0
inpcb 280 29 0 23 1 0 1 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 9 0 7 1 0 1 1 0 8 0
pfstkey 112 9 0 7 1 0 1 1 0 8 0
pfstate 328 9 0 7 1 0 1 1 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 96 0 0 6 0 6 6 0 8 0
art_table 32 97 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
dino1pl 128 1402 0 16 45 0 45 45 0 8 0
ffsino 272 1402 0 16 93 0 93 93 0 8 0
nchpl 144 1577 0 34 58 0 58 58 0 8 0
uvmvnodes 72 1412 0 0 26 0 26 26 0 8 0
vnodes 208 1412 0 0 75 0 75 75 0 8 0
namei 1024 4429 0 4429 2 1 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 4332 0 4331 11 10 1 7 0 8 0
plimitpl 152 14 0 8 1 0 1 1 0 8 0
sigapl 424 566 0 534 4 0 4 4 0 8 0
futexpl 56 3113 0 3112 1 0 1 1 0 8 0
knotepl 112 5 0 0 1 0 1 1 0 8 0
kqueuepl 144 1 0 0 1 0 1 1 0 8 0
pipelkpl 48 751 0 744 2 1 1 1 0 8 0
pipepl 120 1502 0 1490 2 1 1 1 0 8 0
fdescpl 496 551 0 534 3 0 3 3 0 8 0
filepl 152 3022 0 2968 3 0 3 3 0 8 0
lockfpl 104 1377 0 1376 1 0 1 1 0 8 0
lockfspl 48 522 0 521 1 0 1 1 0 8 0
sessionpl 112 18 0 9 1 0 1 1 0 8 0
pgrppl 48 18 0 9 1 0 1 1 0 8 0
ucredpl 96 53 0 44 1 0 1 1 0 8 0
zombiepl 144 534 0 534 2 1 1 1 0 8 1
processpl 960 566 0 534 5 0 5 5 0 8 0
procpl 624 1712 0 1675 4 0 4 4 0 8 0
sockpl 400 73 0 55 2 0 2 2 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 82 0 0 11 0 11 11 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 119 0 0 7 0 7 7 0 8 0
bufpl 280 2870 0 79 200 0 200 200 0 8 0
anonpl 16 40411 0 39086 13 7 6 11 0 124 0
amapchunkpl 152 3178 0 3126 3 0 3 3 0 158 0
amappl16 192 1170 0 1166 4 3 1 4 0 8 0
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 1 0 1 1 1 0 1 0 8 0
amappl13 168 14 0 13 2 1 1 1 0 8 0
amappl12 160 1 0 1 1 1 0 1 0 8 0
amappl11 152 73 0 55 1 0 1 1 0 8 0
amappl10 144 10 0 8 1 0 1 1 0 8 0
amappl9 136 236 0 235 1 0 1 1 0 8 0
amappl8 128 580 0 574 1 0 1 1 0 8 0
amappl7 120 91 0 83 1 0 1 1 0 8 0
amappl6 112 15 0 15 2 2 0 1 0 8 0
amappl5 104 132 0 118 1 0 1 1 0 8 0
amappl4 96 481 0 455 1 0 1 1 0 8 0
amappl3 88 99 0 93 1 0 1 1 0 8 0
amappl2 80 3907 0 3838 3 1 2 2 0 8 0
amappl1 72 22995 0 22540 16 6 10 16 0 8 0
amappl 80 1902 0 1872 1 0 1 1 0 84 0
dma4096 4096 1 0 1 1 1 0 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 1 0 0 1 0 1 1 0 8 0
uaddrrnd 24 551 0 534 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 551 0 534 1 0 1 1 0 8 0
vmmpekpl 168 12462 0 12435 2 0 2 2 0 8 0
vmmpepl 168 57554 0 56570 62 17 45 51 0 357 2
vmsppl 368 550 0 534 2 0 2 2 0 8 0
pdppl 4096 1109 0 1068 6 0 6 6 0 8 0
pvpl 32 121409 0 118244 43 15 28 36 0 265 1
pmappl 232 550 0 534 1 0 1 1 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 143 0 4 4 0 4 4 0 8 0