panic: kernel diagnostic assertion "pg->wire_count == 1" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 329
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*487380 69661 0 0x2 0x4000000 0 syz-fuzzer
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff821e4529,ffffffff821fa563,149,ffffffff821c34b8) at __assert+0x2b sys/kern/subr_prf.c:154
buf_free_pages(fffffd803c76f500) at buf_free_pages+0x1ee sys/kern/vfs_biomem.c:318
buf_dealloc_mem(fffffd803c76f500) at buf_dealloc_mem+0xe1 sys/kern/vfs_biomem.c:194
buf_put(fffffd803c76f500) at buf_put+0x16b sys/kern/vfs_bio.c:131
brelse(fffffd803c76f500) at brelse+0x257 sys/kern/vfs_bio.c:922
vinvalbuf(fffffd80361561b8,2,fffffd803f7c6960,ffff8000ffff4500,0,ffffffffffffffff) at vinvalbuf+0x3b1 sys/kern/vfs_subr.c:1977
ffs_truncate(fffffd803d1c21e0,0,4,fffffd803f7c6960) at ffs_truncate+0xeb1 sys/ufs/ffs/ffs_inode.c:326
ufs_rmdir(ffff8000148e6208) at ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357
VOP_RMDIR(fffffd802b481018,fffffd80361561b8,ffff8000148e6308) at VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
dounlinkat(ffff8000ffff4500,b,c00393e8c0,8) at dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
syscall(ffff8000148e6480) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,145,c00002a000,145,100,46) at Xsyscall+0x128
end of kernel
end trace frame: 0xc0032157e8, count: 1
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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
kernel diagnostic assertion "pg->wire_count == 1" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 329
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff821e4529,ffffffff821fa563,149,ffffffff821c34b8) at __assert+0x2b sys/kern/subr_prf.c:154
buf_free_pages(fffffd803c76f500) at buf_free_pages+0x1ee sys/kern/vfs_biomem.c:318
buf_dealloc_mem(fffffd803c76f500) at buf_dealloc_mem+0xe1 sys/kern/vfs_biomem.c:194
buf_put(fffffd803c76f500) at buf_put+0x16b sys/kern/vfs_bio.c:131
brelse(fffffd803c76f500) at brelse+0x257 sys/kern/vfs_bio.c:922
vinvalbuf(fffffd80361561b8,2,fffffd803f7c6960,ffff8000ffff4500,0,ffffffffffffffff) at vinvalbuf+0x3b1 sys/kern/vfs_subr.c:1977
ffs_truncate(fffffd803d1c21e0,0,4,fffffd803f7c6960) at ffs_truncate+0xeb1 sys/ufs/ffs/ffs_inode.c:326
ufs_rmdir(ffff8000148e6208) at ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357
VOP_RMDIR(fffffd802b481018,fffffd80361561b8,ffff8000148e6308) at VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
dounlinkat(ffff8000ffff4500,b,c00393e8c0,8) at dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
syscall(ffff8000148e6480) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,145,c00002a000,145,100,46) at Xsyscall+0x128
end of kernel
end trace frame: 0xc0032157e8, count: -14
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff8000148e5ce0
rbx 0xffff8000148e5d90
rdx 0x2
rcx 0
rax 0
r8 0xffff8000148e5ca0
r9 0x1
r10 0
r11 0x677c2bc415d22877
r12 0x3000000008
r13 0xffff8000148e5cf0
r14 0x100
r15 0x1
rip 0xffffffff81f6e8c8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000148e5cd0
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-fuzzer) pid=487380 stat=onproc
flags process=2<EXEC> proc=4000000<THREAD>
pri=17, usrpri=81, nice=20
forw=0xffffffffffffffff, list=0xffff8000ffff58c0,0xffff8000ffff4788
process=0xffff8000148a2018 user=0xffff8000148e1000, vmspace=0xfffffd803f013990
estcpu=31, cpticks=1, pctcpu=0.15
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
334 384396 79127 0 2 0 syz-executor.1
334 127141 79127 0 3 0x4000000 biowait syz-executor.1
79127 378567 69661 0 3 0x82 nanosleep syz-executor.1
67722 125491 0 0 3 0x14200 acct acct
44974 437608 1 0 3 0x100083 ttyin getty
44261 76825 0 0 3 0x14200 bored sosplice
69661 16606 27787 0 3 0x82 thrsleep syz-fuzzer
69661 112921 27787 0 3 0x4000082 nanosleep syz-fuzzer
*69661 487380 27787 0 7 0x4000002 syz-fuzzer
69661 159953 27787 0 3 0x4000082 thrsleep syz-fuzzer
69661 146899 27787 0 3 0x4000082 thrsleep syz-fuzzer
69661 199505 27787 0 3 0x4000082 thrsleep syz-fuzzer
69661 359210 27787 0 3 0x4000082 thrsleep syz-fuzzer
69661 421938 27787 0 3 0x4000082 thrsleep syz-fuzzer
27787 461017 1950 0 3 0x10008a pause ksh
1950 73647 44529 0 3 0x92 select sshd
44529 198008 1 0 3 0x80 select sshd
44445 290175 48273 73 3 0x100090 kqread syslogd
48273 340378 1 0 3 0x100082 netio syslogd
47682 493282 1 77 3 0x100090 poll dhclient
66593 484400 1 0 3 0x80 poll dhclient
91694 168296 0 0 2 0x14200 zerothread
13406 247144 0 0 3 0x14200 aiodoned aiodoned
8707 296196 0 0 3 0x14200 syncer update
62001 323517 0 0 3 0x14200 cleaner cleaner
19861 311353 0 0 3 0x14200 reaper reaper
38829 180023 0 0 3 0x14200 pgdaemon pagedaemon
28544 173670 0 0 3 0x14200 bored crynlk
79358 158682 0 0 3 0x14200 bored crypto
25701 317109 0 0 3 0x40014200 acpi0 acpi0
98951 469508 0 0 3 0x14200 bored softnet
29744 376129 0 0 3 0x14200 bored systqmp
1838 154382 0 0 3 0x14200 bored systq
46713 395224 0 0 3 0x40014200 bored softclock
7173 184136 0 0 3 0x40014200 idle0
38028 114242 0 0 3 0x14200 bored smr
1 164201 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9577 7014K 8245K 78643K 29720 0 0
pcb 13 11K 12K 78643K 2034 0 0
rtable 118 12K 13K 78643K 3058 0 0
ifaddr 89 20K 21K 78643K 792 0 0
counters 19 16K 16K 78643K 19 0 0
ioctlops 0 0K 2K 78643K 378 0 0
iov 0 0K 28K 78643K 1195 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1211 76K 77K 78643K 7803 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 9K 78643K 74 0 0
VM map 45 11K 11K 78643K 80 0 0
sem 12 0K 0K 78643K 3172 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1793 195K 288K 78643K 12645 0 0
file desc 4 9K 25K 78643K 4554 0 0
sigio 0 0K 0K 78643K 76 0 0
proc 49 38K 63K 78643K 1771 0 0
subproc 16 1K 2K 78643K 493 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 384 0 0
in_multi 28 1K 2K 78643K 500 0 0
ether_multi 1 0K 0K 78643K 34 0 0
mrt 0 0K 0K 78643K 22 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 78 344K 344K 78643K 78 0 0
exec 0 0K 1K 78643K 1038 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 161 295K 312K 78643K 12370 0 0
UVM aobj 130 4K 4K 78643K 137 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 1K 78643K 983 0 0
NDP 21 0K 1K 78643K 262 0 0
temp 219 3546K 4185K 78643K 204447 0 0
kqueue 0 0K 0K 78643K 46 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 113 0 108 1 0 1 1 0 8 0
rtpcb 80 493 0 491 1 0 1 1 0 8 0
rtentry 112 553 0 512 2 0 2 2 0 8 0
unpcb 120 3430 0 3417 3 2 1 2 0 8 0
syncache 264 31 0 31 14 13 1 1 0 8 1
sackhl 24 3 0 3 1 1 0 1 0 8 0
tcpqe 32 221 0 221 8 8 0 1 0 8 0
tcpcb 544 3822 0 3818 46 44 2 14 0 8 1
ipq 40 48 0 48 12 12 0 1 0 8 0
ipqe 40 1017 0 1017 12 12 0 1 0 8 0
inpcb 280 8295 0 8288 40 38 2 9 0 8 1
rttmr 72 6 0 5 2 1 1 1 0 8 0
ip6q 72 6 0 6 4 4 0 1 0 8 0
ip6af 40 15 0 15 3 3 0 1 0 8 0
nd6 48 74 0 72 5 4 1 1 0 8 0
pkpcb 40 12 0 12 5 5 0 1 0 8 0
swfcl 56 6 0 0 1 0 1 1 0 8 0
ppxss 1128 88 0 88 19 18 1 1 0 8 1
art_heap8 4096 17 0 14 9 6 3 4 0 8 0
art_heap4 256 2252 0 2042 35 21 14 18 0 8 0
art_table 32 2269 0 2056 4 1 3 3 0 8 0
art_node 16 552 0 516 1 0 1 1 0 8 0
sysvmsgpl 40 44 0 25 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 3170 0 3160 1 0 1 1 0 8 0
shmpl 112 135 0 7 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 8319 0 6921 46 0 46 46 0 8 0
ffsino 240 8319 0 6921 83 0 83 83 0 8 0
nchpl 144 15219 0 14787 60 41 19 60 0 8 0
uvmvnodes 72 8085 0 0 147 0 147 147 0 8 0
vnodes 208 8085 0 0 426 0 426 426 0 8 0
namei 1024 60257 0 60256 3 2 1 1 0 8 0
vcpupl 1984 43 0 0 6 0 6 6 0 8 0
vmpool 520 78 0 35 3 0 3 3 0 8 0
scsiplug 64 4 0 4 4 3 1 1 0 8 1
scxspl 192 60913 0 60912 32 28 4 7 0 8 3
plimitpl 152 391 0 385 1 0 1 1 0 8 0
sigapl 432 4645 0 4633 2 0 2 2 0 8 0
futexpl 56 166800 0 166800 5 4 1 1 0 8 1
knotepl 112 1358 0 1336 5 4 1 3 0 8 0
kqueuepl 104 1547 0 1544 7 6 1 4 0 8 0
pipepl 112 4744 0 4729 16 15 1 2 0 8 0
fdescpl 424 4646 0 4633 2 0 2 2 0 8 0
filepl 120 45964 0 45886 36 31 5 11 0 8 2
lockfpl 104 1761 0 1760 1 0 1 1 0 8 0
lockfspl 48 592 0 591 1 0 1 1 0 8 0
sessionpl 112 45 0 36 1 0 1 1 0 8 0
pgrppl 48 189 0 180 1 0 1 1 0 8 0
ucredpl 96 5116 0 5109 1 0 1 1 0 8 0
zombiepl 144 4634 0 4634 1 0 1 1 0 8 1
processpl 864 4663 0 4634 4 0 4 4 0 8 0
procpl 632 10142 0 10105 5 1 4 5 0 8 0
sosppl 128 50 0 50 12 12 0 1 0 8 0
sockpl 384 12318 0 12294 55 50 5 14 0 8 2
mcl64k 65536 1769 0 1769 165 164 1 65 0 8 1
mcl16k 16384 77 0 77 16 15 1 1 0 8 1
mcl12k 12288 193 0 193 10 9 1 1 0 8 1
mcl9k 9216 92 0 92 15 14 1 1 0 8 1
mcl8k 8192 236 0 236 10 9 1 1 0 8 1
mcl4k 4096 520 0 520 8 7 1 1 0 8 1
mcl2k2 2112 56 0 56 17 17 0 1 0 8 0
mcl2k 2048 78570 0 78521 27 20 7 16 0 8 0
mtagpl 80 231 0 231 7 6 1 1 0 8 1
mbufpl 256 171889 0 171782 194 186 8 41 0 8 0
bufpl 256 27649 0 19554 507 0 507 507 0 8 0
anonpl 16 692002 0 675541 201 114 87 108 0 62 0
amapchunkpl 152 27912 0 27707 119 109 10 23 0 158 0
amappl16 192 32872 0 31724 272 212 60 75 0 8 0
amappl15 184 585 0 584 1 0 1 1 0 8 0
amappl14 176 729 0 725 1 0 1 1 0 8 0
amappl13 168 382 0 382 4 3 1 1 0 8 1
amappl12 160 1070 0 1066 1 0 1 1 0 8 0
amappl11 152 426 0 415 1 0 1 1 0 8 0
amappl10 144 1252 0 1250 4 3 1 1 0 8 0
amappl9 136 1283 0 1277 1 0 1 1 0 8 0
amappl8 128 813 0 772 2 0 2 2 0 8 0
amappl7 120 1359 0 1352 1 0 1 1 0 8 0
amappl6 112 371 0 359 1 0 1 1 0 8 0
amappl5 104 1448 0 1439 1 0 1 1 0 8 0
amappl4 96 4070 0 4042 1 0 1 1 0 8 0
amappl3 88 1901 0 1895 1 0 1 1 0 8 0
amappl2 80 35184 0 35109 3 1 2 3 0 8 0
amappl1 72 95087 0 94676 28 19 9 20 0 8 0
amappl 80 10903 0 10838 2 0 2 2 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 17 0 17 1 1 0 1 0 8 0
aobjpl 64 136 0 7 3 0 3 3 0 8 0
uaddrrnd 24 4724 0 4633 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 4724 0 4633 1 0 1 1 0 8 0
vmmpekpl 168 35413 0 35374 2 0 2 2 0 8 0
vmmpepl 168 578732 0 576440 394 247 147 157 0 357 38
vmsppl 272 4645 0 4633 6 5 1 2 0 8 0
pdppl 4096 9454 0 9379 14 4 10 10 0 8 0
pvpl 32 1789992 0 1771235 567 307 260 328 0 265 68
pmappl 200 4723 0 4668 4 0 4 4 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 1128 0 485 21 1 20 21 0 8 0