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
*354215 83641 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(ffffffff821e0400,ffffffff821f3c47,149,ffffffff821bd0e0) at __assert+0x2e sys/kern/subr_prf.c:154
buf_free_pages(fffffd802735ea00) at buf_free_pages+0x1ee sys/kern/vfs_biomem.c:318
buf_dealloc_mem(fffffd802735ea00) at buf_dealloc_mem+0xe1 sys/kern/vfs_biomem.c:194
buf_put(fffffd802735ea00) at buf_put+0x172 sys/kern/vfs_bio.c:131
brelse(fffffd802735ea00) at brelse+0x257 sys/kern/vfs_bio.c:922
vinvalbuf(fffffd802f545348,2,fffffd803f7c6ba0,ffff8000ffff49f0,0,ffffffffffffffff) at vinvalbuf+0x3de sys/kern/vfs_subr.c:1974
ffs_truncate(fffffd8036a55008,0,4,fffffd803f7c6ba0) at ffs_truncate+0xeb5 sys/ufs/ffs/ffs_inode.c:326
ufs_rmdir(ffff8000148e5e88) at ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357
VOP_RMDIR(fffffd802f5451b8,fffffd802f545348,ffff8000148e5f88) at VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:473
dounlinkat(ffff8000ffff49f0,b,c0024ef920,8) at dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
syscall(ffff8000148e6100) at syscall+0x508
Xsyscall(6,145,c00002a000,145,100,c9) at Xsyscall+0x128
end of kernel
end trace frame: 0xc001e6f808, 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(ffffffff821e0400,ffffffff821f3c47,149,ffffffff821bd0e0) at __assert+0x2e sys/kern/subr_prf.c:154
buf_free_pages(fffffd802735ea00) at buf_free_pages+0x1ee sys/kern/vfs_biomem.c:318
buf_dealloc_mem(fffffd802735ea00) at buf_dealloc_mem+0xe1 sys/kern/vfs_biomem.c:194
buf_put(fffffd802735ea00) at buf_put+0x172 sys/kern/vfs_bio.c:131
brelse(fffffd802735ea00) at brelse+0x257 sys/kern/vfs_bio.c:922
vinvalbuf(fffffd802f545348,2,fffffd803f7c6ba0,ffff8000ffff49f0,0,ffffffffffffffff) at vinvalbuf+0x3de sys/kern/vfs_subr.c:1974
ffs_truncate(fffffd8036a55008,0,4,fffffd803f7c6ba0) at ffs_truncate+0xeb5 sys/ufs/ffs/ffs_inode.c:326
ufs_rmdir(ffff8000148e5e88) at ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357
VOP_RMDIR(fffffd802f5451b8,fffffd802f545348,ffff8000148e5f88) at VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:473
dounlinkat(ffff8000ffff49f0,b,c0024ef920,8) at dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
syscall(ffff8000148e6100) at syscall+0x508
Xsyscall(6,145,c00002a000,145,100,c9) at Xsyscall+0x128
end of kernel
end trace frame: 0xc001e6f808, count: -14
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff8000148e5960
rbx 0xffff8000148e5a10
rdx 0x2
rcx 0
rax 0
r8 0xffff8000148e5920
r9 0x1
r10 0
r11 0xcdf905501e60aa1c
r12 0x3000000008
r13 0xffff8000148e5970
r14 0x100
r15 0x1
rip 0xffffffff8200cf28 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000148e5950
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-fuzzer) pid=354215 stat=onproc
flags process=2<EXEC> proc=4000000<THREAD>
pri=17, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff8000ffff4288,0xffff8000ffff53e0
process=0xffff8000148a2378 user=0xffff8000148e1000, vmspace=0xfffffd803f013cc0
estcpu=0, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
79096 486121 1 0 3 0x100083 ttyin getty
76071 107575 0 0 3 0x14200 bored sosplice
83641 489000 52105 0 3 0x82 thrsleep syz-fuzzer
83641 269402 52105 0 3 0x4000082 nanosleep syz-fuzzer
*83641 354215 52105 0 7 0x4000002 syz-fuzzer
83641 444538 52105 0 3 0x4000082 thrsleep syz-fuzzer
83641 207401 52105 0 3 0x4000082 thrsleep syz-fuzzer
83641 499183 52105 0 3 0x4000002 biowait syz-fuzzer
83641 350444 52105 0 3 0x4000082 thrsleep syz-fuzzer
83641 408818 52105 0 3 0x4000082 thrsleep syz-fuzzer
52105 507214 58568 0 3 0x10008a pause ksh
58568 36134 50294 0 3 0x92 select sshd
50294 261081 1 0 3 0x80 select sshd
80835 70818 83081 73 3 0x100010 biowait syslogd
83081 398158 1 0 3 0x100082 netio syslogd
73714 348210 1 77 3 0x100090 poll dhclient
99543 71155 1 0 3 0x80 poll dhclient
28255 220792 0 0 3 0x14200 pgzero zerothread
95208 368665 0 0 3 0x14200 aiodoned aiodoned
60675 168605 0 0 3 0x14200 syncer update
6829 462726 0 0 3 0x14200 cleaner cleaner
50986 407630 0 0 3 0x14200 reaper reaper
47767 159733 0 0 3 0x14200 pgdaemon pagedaemon
53094 188838 0 0 3 0x14200 bored crynlk
11149 502758 0 0 3 0x14200 bored crypto
34530 389375 0 0 3 0x40014200 acpi0 acpi0
61197 281898 0 0 3 0x14200 bored softnet
92490 508138 0 0 3 0x14200 bored systqmp
508 335613 0 0 3 0x14200 bored systq
70282 268799 0 0 3 0x40014200 bored softclock
79663 272502 0 0 3 0x40014200 idle0
45956 138204 0 0 3 0x14200 bored smr
1 477975 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 9551 6376K 15321K 78643K 38502 0 0
pcb 13 8K 8K 78643K 931 0 0
rtable 74 3K 5K 78643K 3275 0 0
ifaddr 59 19K 26K 78643K 1079 0 0
counters 19 16K 16K 78643K 19 0 0
ioctlops 0 0K 2K 78643K 596 0 0
iov 0 0K 32K 78643K 1162 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1208 76K 77K 78643K 11384 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 124 0 0
VM map 2 0K 0K 78643K 2 0 0
sem 12 0K 1K 78643K 1125 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1793 195K 288K 78643K 12645 0 0
file desc 2 1K 25K 78643K 10856 0 0
sigio 0 0K 0K 78643K 152 0 0
proc 42 30K 54K 78643K 2836 0 0
subproc 0 0K 2K 78643K 588 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 1077 0 0
in_multi 11 0K 2K 78643K 720 0 0
ether_multi 1 0K 0K 78643K 44 0 0
mrt 0 0K 0K 78643K 19 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 114 503K 503K 78643K 114 0 0
exec 0 0K 1K 78643K 1614 0 0
pfkey data 0 0K 0K 78643K 4 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 86 4K 32K 78643K 26447 0 0
UVM aobj 130 4K 4K 78643K 155 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 756 0 0
NDP 15 0K 1K 78643K 336 0 0
temp 157 3533K 4176K 78643K 179530 0 0
kqueue 0 0K 0K 78643K 80 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 74 0 72 1 0 1 1 0 8 0
rtpcb 80 514 0 512 1 0 1 1 0 8 0
rtentry 112 413 0 390 3 1 2 2 0 8 0
unpcb 120 3920 0 3912 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 1001 0 1001 1 1 0 1 0 8 0
tcpcb 544 1794 0 1790 1 0 1 1 0 8 0
ipq 40 29 0 28 12 11 1 1 0 8 0
ipqe 40 66 0 65 12 11 1 1 0 8 0
inpcb 280 5287 0 5280 9 8 1 2 0 8 0
nd6 48 102 0 102 1 0 1 1 0 8 1
pkpcb 40 36 0 36 13 13 0 1 0 8 0
swfcl 56 2 0 0 1 0 1 1 0 8 0
ppxss 1128 161 0 161 39 39 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1677 0 1580 26 13 13 13 0 8 6
art_table 32 1678 0 1580 2 0 2 2 0 8 1
art_node 16 401 0 381 1 0 1 1 0 8 0
sysvmsgpl 40 58 0 34 1 0 1 1 0 8 0
semupl 112 4 0 4 1 1 0 1 0 8 0
semapl 112 1123 0 1113 1 0 1 1 0 8 0
shmpl 112 153 0 25 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 18253 0 16832 47 0 47 47 0 8 0
ffsino 240 18253 0 16832 85 0 85 85 0 8 0
nchpl 144 33504 0 31881 62 0 62 62 0 8 0
uvmvnodes 72 7779 0 0 142 0 142 142 0 8 0
vnodes 200 7779 0 0 410 0 410 410 0 8 0
namei 1024 111259 0 111259 11 10 1 1 0 8 1
scsiplug 64 25 0 25 18 18 0 1 0 8 0
scxspl 192 115304 0 115302 33 32 1 7 0 8 0
plimitpl 152 964 0 959 1 0 1 1 0 8 0
sigapl 432 10944 0 10934 2 0 2 2 0 8 0
futexpl 56 176358 0 176358 12 12 0 1 0 8 0
knotepl 112 2529 0 2502 2 1 1 2 0 8 0
kqueuepl 104 2500 0 2498 1 0 1 1 0 8 0
pipepl 112 6140 0 6129 14 13 1 2 0 8 0
fdescpl 424 10945 0 10934 2 0 2 2 0 8 0
filepl 120 66243 0 66185 12 8 4 5 0 8 0
lockfpl 104 3592 0 3592 13 12 1 1 0 8 1
lockfspl 48 1190 0 1190 13 12 1 1 0 8 1
sessionpl 112 62 0 54 1 0 1 1 0 8 0
pgrppl 48 166 0 158 1 0 1 1 0 8 0
ucredpl 96 13487 0 13478 1 0 1 1 0 8 0
zombiepl 144 10937 0 10937 1 0 1 1 0 8 1
processpl 864 10963 0 10937 4 0 4 4 0 8 0
procpl 632 24064 0 24031 5 1 4 5 0 8 0
sosppl 128 122 0 122 31 31 0 1 0 8 0
sockpl 384 9868 0 9851 19 17 2 4 0 8 0
mcl64k 65536 1517 0 1517 155 155 0 33 0 8 0
mcl16k 16384 44 0 44 34 34 0 1 0 8 0
mcl12k 12288 199 0 199 34 34 0 1 0 8 0
mcl9k 9216 143 0 143 41 41 0 1 0 8 0
mcl8k 8192 195 0 195 34 34 0 1 0 8 0
mcl4k 4096 576 0 576 20 20 0 1 0 8 0
mcl2k2 2112 60 0 60 29 29 0 1 0 8 0
mcl2k 2048 76606 0 76563 18 12 6 10 0 8 0
mtagpl 80 296 0 296 5 4 1 1 0 8 1
mbufpl 256 178722 0 178658 89 79 10 24 0 8 3
bufpl 256 34918 0 27136 487 0 487 487 0 8 0
anonpl 16 963737 0 951668 363 295 68 83 0 62 8
amapchunkpl 152 47312 0 47214 101 86 15 18 0 158 9
amappl16 192 55907 0 55221 357 320 37 55 0 8 1
amappl15 184 1301 0 1300 1 0 1 1 0 8 0
amappl14 176 1781 0 1775 1 0 1 1 0 8 0
amappl13 168 2474 0 2474 7 6 1 1 0 8 1
amappl12 160 2289 0 2287 1 0 1 1 0 8 0
amappl11 152 1293 0 1281 1 0 1 1 0 8 0
amappl10 144 617 0 616 1 0 1 1 0 8 0
amappl9 136 2178 0 2177 1 0 1 1 0 8 0
amappl8 128 1659 0 1625 3 1 2 2 0 8 0
amappl7 120 623 0 615 1 0 1 1 0 8 0
amappl6 112 1247 0 1236 1 0 1 1 0 8 0
amappl5 104 2727 0 2717 1 0 1 1 0 8 0
amappl4 96 10138 0 10115 1 0 1 1 0 8 0
amappl3 88 2914 0 2904 1 0 1 1 0 8 0
amappl2 80 86746 0 86691 3 1 2 3 0 8 0
amappl1 72 201441 0 201066 26 17 9 19 0 8 0
amappl 80 24826 0 24797 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
dma64 64 259 0 259 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 64 154 0 25 3 0 3 3 0 8 0
uaddrrnd 24 10945 0 10934 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 10945 0 10934 1 0 1 1 0 8 0
vmmpekpl 168 66404 0 66383 2 0 2 2 0 8 0
vmmpepl 168 1267200 0 1265696 584 500 84 113 0 357 2
vmsppl 272 10944 0 10934 5 4 1 2 0 8 0
pdppl 4096 21896 0 21868 7 2 5 6 0 8 0
pvpl 32 2795199 0 2780280 985 729 256 275 0 265 120
pmappl 200 10944 0 10934 1 0 1 1 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 978 0 365 21 2 19 19 0 8 0