panic: ffs_blkfree: freeing free frag (2)
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syzbot
Aug 5, 2026, 12:41:41 AMAug 5
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: e4512c136ac0 libsa: drop prototypes for functions not impl..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1626cbb9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=2b3c7f8a2b4e67cdd315
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/cee7fa05fea7/disk-e4512c13.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/5a00e7ed23d3/bsd-e4512c13.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b6276719ec5f/kernel-e4512c13.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2b3c7f...@syzkaller.appspotmail.com
panic: ffs_blkfree: freeing free frag
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*418394 95630 0 0x10000002 0 0 sshd
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198
ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259
ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325
ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403
VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210
vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180
doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163
sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065
syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x724c3a85dee0, 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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: ffs_blkfree: freeing free frag
ddb> show kasan
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198
ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259
ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325
ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403
VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210
vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180
doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163
sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065
syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x724c3a85dee0, count: -11
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a7b7280
rbx 0x2560 __ALIGN_SIZE+0x1560
rdx 0
rcx 0
rax 0xffff80002a772fa0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x27f61003fdf2938c
r11 0x3708f4ff3aa434b
r12 0
r13 0x90255 acpi_pdirpa+0x7c0c6
r14 0
r15 0x1
rip 0xffffffff8330a1a5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a7b7270
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb> show proc
PROC (sshd) tid=418394 pid=95630 tcnt=1 stat=onproc
flags process=10000002<EXEC,WAITEVENT> proc=0
runpri=17, usrpri=51, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a772a70,0xffff80002a773248
process=0xffff80002a79f610 user=0xffff80002a7b2000, vmspace=0xfffff1007661da18
estcpu=1, cpticks=3, pctcpu=0.0, user=0, sys=2, intr=0
ddb> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
38066 410878 75320 0 2 0 0 syz-executor
38066 482693 75320 0 2 0 0x4000000 syz-executor
63900 381196 76351 0 2 0 0 syz-executor
64959 463962 1 0 3 0 0x80 nanoslp init
11968 382064 57852 0 3 0x11 0x80 nanoslp syz-executor
11968 401903 57852 0 3 0x11 0x4000080 fsleep syz-executor
11968 491535 57852 0 2 0x11 0x4000000 syz-executor
11968 379541 57852 0 3 0x11 0x4000080 fsleep syz-executor
64510 42329 21620 0 2 0 0 syz-executor
64510 514353 21620 0 3 0 0x4000080 fsleep syz-executor
65367 265929 94507 0 3 0x1000 0x4080000 smrbar syz-executor
65367 47514 94507 0 3 0x1000 0x4002000 suspend syz-executor
15314 40111 11987 60929 3 0x10 0x80 nanoslp syz-executor
15314 281021 11987 60929 3 0x10 0x4000080 fsleep syz-executor
76351 191820 69091 0 2 0x2 0 syz-executor
5257 21410 69091 0 3 0x2 0x80 nanoslp syz-executor
11987 102010 69091 0 3 0x2 0x80 nanoslp syz-executor
75320 442030 69091 0 3 0x2 0x80 nanoslp syz-executor
89154 412896 69091 0 2 0x2 0 syz-executor
57852 418624 69091 0 3 0x2 0x80 nanoslp syz-executor
21620 374677 69091 0 3 0x2 0x80 nanoslp syz-executor
94507 282065 69091 0 3 0x2 0x80 nanoslp syz-executor
69091 516889 1 0 3 0x2 0x80 kqread syz-executor
*95630 418394 1 0 7 0x10000002 0 sshd
51484 146087 83960 73 3 0x1100010 0x80 kqread syslogd
83960 434526 1 0 3 0x100002 0x80 sbwait syslogd
58523 91563 1 0 3 0x100000 0x80 kqread resolvd
73582 252192 42675 77 3 0x100012 0x80 kqread dhcpleased
79468 43127 42675 77 3 0x100012 0x80 kqread dhcpleased
42675 470962 1 0 3 0 0x80 kqread dhcpleased
80907 109324 0 0 3 0x14000 0x200 bored smr
61104 316474 0 0 2 0x14000 0x200 zerothread
79297 76410 0 0 3 0x14000 0x200 aiodoned aiodoned
99447 83818 0 0 3 0x14000 0x200 syncer update
56623 142315 0 0 3 0x14000 0x200 cleaner cleaner
57193 167900 0 0 3 0x14000 0x200 reaper reaper
43272 48417 0 0 3 0x14000 0x200 pgdaemon pagedaemon
90320 373657 0 0 3 0x14000 0x200 bored viomb
56109 332086 0 0 3 0x14000 0x40000200 acpi0 acpi0
83149 186554 0 0 3 0x14000 0x200 bored softnet0
19837 415764 0 0 3 0x14000 0x200 bored systqmp
72900 175188 0 0 3 0x14000 0x200 bored systq
18835 308152 0 0 3 0x14000 0x40000200 tmoslp softclock
68271 228798 0 0 3 0x14000 0x40000200 idle0
1 329672 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11064 12110K 12280K 166960K 12334 0
pcb 18 13K 14K 166960K 103 0
rtable 253 8K 8K 166960K 400 0
pf 34 13K 20K 166960K 68 0
ifaddr 43 7K 7K 166960K 46 0
ifgroup 55 2K 2K 166960K 60 0
sysctl 3 1K 9K 166960K 9 0
counters 34 17K 18K 166960K 37 0
ioctlops 0 0K 4K 166960K 75 0
iov 0 0K 12K 166960K 76 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1301 82K 82K 166960K 1481 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 17 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 17 61K 97K 166960K 317 0
sigio 0 0K 0K 166960K 4 0
proc 51 50K 124K 166960K 510 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 27 0
in_multi 99 6K 7K 166960K 106 0
ether_multi 1 0K 0K 166960K 3 0
mrt 0 0K 0K 166960K 6 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 223 996K 996K 166960K 223 0
exec 0 0K 1K 166960K 381 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 189 121K 152K 166960K 4599 0
UVM aobj 7 2K 4K 166960K 8 0
pinsyscall 32 64K 96K 166960K 1427 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 2 0K 0K 166960K 10 0
NDP 12 0K 2K 166960K 29 0
temp 36 9112K 9122K 166960K 4323 0
kqueue 13 20K 28K 166960K 62 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 51 0 47 1 0 1 1 0 8 0
rtentry 136 118 0 6 4 0 4 4 0 8 0
unpcb 144 156 0 140 1 0 1 1 0 8 0
syncache 336 6 0 6 2 1 1 1 0 8 1
tcpcb 736 82 0 78 4 3 1 4 0 8 0
arp 96 19 0 1 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 1 0 0 1 0 1 1 0 8 0
inpcb 328 264 0 256 7 5 2 7 0 8 0
nd6 112 25 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1072 3 0 3 1 0 1 1 0 8 1
pfstscr 40 3 0 1 1 0 1 1 0 8 0
pfrktable 1344 2 0 2 1 1 0 1 0 8 0
pfanchor 1288 5 0 0 1 0 1 1 0 8 0
pftag 88 3 0 2 1 0 1 1 0 8 0
pfstitem 24 4 0 0 1 0 1 1 0 8 0
pfstkey 128 6 0 2 1 0 1 1 0 8 0
pfstate 384 3 0 1 1 0 1 1 0 8 0
pfrule 1360 5 0 5 1 1 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 455 0 2 29 0 29 29 0 8 0
art_table 40 458 0 2 5 0 5 5 0 8 0
art_node 32 117 0 15 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 72 14 0 4 1 0 1 1 0 8 0
shmpl 112 5 0 1 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 1883 0 423 92 0 92 92 0 8 0
ffsino 256 1883 0 423 92 0 92 92 0 8 0
nchpl 144 2324 0 624 64 0 64 64 0 8 0
rtmask 32 2 0 2 1 0 1 1 0 8 1
vnodes 216 2033 0 0 113 0 113 113 0 8 0
namei 1024 7551 0 7550 2 1 1 1 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
kstatmem 264 27 0 2 2 0 2 2 0 8 0
scsiplug 72 2 0 2 1 1 0 1 0 8 0
scxspl 216 7841 0 7841 3 2 1 3 1 8 1
plimitpl 152 124 0 109 1 0 1 1 0 8 0
sigapl 424 615 0 575 6 1 5 6 0 8 0
knotepl 120 10785 0 10742 26 15 11 19 0 8 8
kqueuepl 184 61 0 50 1 0 1 1 0 8 0
pipepl 304 138 0 111 3 0 3 3 0 8 0
fdescpl 448 602 0 576 5 1 4 5 0 8 0
filepl 120 3031 0 2815 10 1 9 9 0 8 1
lockfpl 104 53 0 51 1 0 1 1 0 8 0
lockfspl 48 25 0 23 1 0 1 1 0 8 0
sessionpl 144 35 0 27 1 0 1 1 0 8 0
pgrppl 48 45 0 29 1 0 1 1 0 8 0
ucredpl 104 410 0 397 1 0 1 1 0 8 0
zombiepl 144 577 0 575 2 1 1 1 0 8 0
processpl 1152 615 0 575 4 0 4 4 0 8 0
procpl 664 891 0 843 6 1 5 6 0 8 0
sockpl 552 481 0 453 8 5 3 8 0 8 0
mcl64k 65536 5 0 5 2 1 1 1 0 8 1
mcl8k 8192 9 0 9 2 1 1 1 0 8 1
mcl4k 4096 2771 0 2721 14 7 7 14 0 8 0
mcl2k 2048 252 0 251 1 0 1 1 0 8 0
mextrefs 64 111 0 110 1 0 1 1 0 8 0
mtagpl 96 5 0 5 1 1 0 1 0 8 0
mbufpl 256 8088 0 7945 25 7 18 18 0 8 6
bufpl 272 2657 0 102 171 0 171 171 0 8 0
anonpl 24 108993 0 106420 46 19 27 46 0 187 0
amapchunkpl 152 13990 0 13590 32 11 21 32 0 158 1
amappl16 200 1644 0 1619 14 11 3 14 0 8 0
amappl15 192 24 0 24 1 1 0 1 0 8 0
amappl14 184 410 0 410 1 0 1 1 0 8 1
amappl13 176 145 0 138 1 0 1 1 0 8 0
amappl12 168 851 0 828 2 0 2 2 0 8 0
amappl11 160 6 0 6 1 1 0 1 0 8 0
amappl10 152 61 0 51 1 0 1 1 0 8 0
amappl9 144 275 0 274 1 0 1 1 0 8 0
amappl8 136 116 0 114 1 0 1 1 0 8 0
amappl7 128 146 0 136 1 0 1 1 0 8 0
amappl6 120 148 0 147 1 0 1 1 0 8 0
amappl5 112 88 0 83 1 0 1 1 0 8 0
amappl4 104 275 0 259 1 0 1 1 0 8 0
amappl3 96 2560 0 2470 4 1 3 4 0 8 0
amappl2 88 535 0 492 2 0 2 2 0 8 0
amappl1 80 11075 0 10721 14 2 12 14 0 8 1
amappl 88 3863 0 3725 5 0 5 5 0 92 0
uvmvnodes 80 100 0 0 3 0 3 3 0 8 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 128 254 0 254 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 7 0 1 1 0 1 1 0 8 0
uaddrrnd 24 602 0 576 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 602 0 576 1 0 1 1 0 8 0
vmmpekpl 168 6715 0 6680 2 0 2 2 0 8 0
vmmpepl 168 46723 0 45317 92 11 81 91 0 357 7
vmsppl 368 601 0 576 4 1 3 4 0 8 0
rwobjpl 40 15964 0 15206 13 2 11 13 0 8 0
pdppl 4096 1210 0 1152 96 30 66 82 0 8 8
pvpl 32 278859 0 271894 116 25 91 116 0 265 12
pmappl 216 601 0 576 3 0 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 551 0 56 15 0 15 15 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198
ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259
ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325
ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403
VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210
vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180
doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163
sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065
syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x724c3a85dee0, count: -11
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198
ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259
ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325
ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403
VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210
vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180
doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163
sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065
syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x724c3a85dee0, count: -11
ddb>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: e4512c136ac0 libsa: drop prototypes for functions not impl..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1626cbb9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=2b3c7f8a2b4e67cdd315
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/cee7fa05fea7/disk-e4512c13.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/5a00e7ed23d3/bsd-e4512c13.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b6276719ec5f/kernel-e4512c13.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2b3c7f...@syzkaller.appspotmail.com
panic: ffs_blkfree: freeing free frag
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*418394 95630 0 0x10000002 0 0 sshd
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198
ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259
ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325
ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403
VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210
vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180
doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163
sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065
syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x724c3a85dee0, 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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: ffs_blkfree: freeing free frag
ddb> show kasan
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198
ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259
ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325
ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403
VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210
vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180
doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163
sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065
syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x724c3a85dee0, count: -11
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a7b7280
rbx 0x2560 __ALIGN_SIZE+0x1560
rdx 0
rcx 0
rax 0xffff80002a772fa0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x27f61003fdf2938c
r11 0x3708f4ff3aa434b
r12 0
r13 0x90255 acpi_pdirpa+0x7c0c6
r14 0
r15 0x1
rip 0xffffffff8330a1a5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a7b7270
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb> show proc
PROC (sshd) tid=418394 pid=95630 tcnt=1 stat=onproc
flags process=10000002<EXEC,WAITEVENT> proc=0
runpri=17, usrpri=51, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a772a70,0xffff80002a773248
process=0xffff80002a79f610 user=0xffff80002a7b2000, vmspace=0xfffff1007661da18
estcpu=1, cpticks=3, pctcpu=0.0, user=0, sys=2, intr=0
ddb> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
38066 410878 75320 0 2 0 0 syz-executor
38066 482693 75320 0 2 0 0x4000000 syz-executor
63900 381196 76351 0 2 0 0 syz-executor
64959 463962 1 0 3 0 0x80 nanoslp init
11968 382064 57852 0 3 0x11 0x80 nanoslp syz-executor
11968 401903 57852 0 3 0x11 0x4000080 fsleep syz-executor
11968 491535 57852 0 2 0x11 0x4000000 syz-executor
11968 379541 57852 0 3 0x11 0x4000080 fsleep syz-executor
64510 42329 21620 0 2 0 0 syz-executor
64510 514353 21620 0 3 0 0x4000080 fsleep syz-executor
65367 265929 94507 0 3 0x1000 0x4080000 smrbar syz-executor
65367 47514 94507 0 3 0x1000 0x4002000 suspend syz-executor
15314 40111 11987 60929 3 0x10 0x80 nanoslp syz-executor
15314 281021 11987 60929 3 0x10 0x4000080 fsleep syz-executor
76351 191820 69091 0 2 0x2 0 syz-executor
5257 21410 69091 0 3 0x2 0x80 nanoslp syz-executor
11987 102010 69091 0 3 0x2 0x80 nanoslp syz-executor
75320 442030 69091 0 3 0x2 0x80 nanoslp syz-executor
89154 412896 69091 0 2 0x2 0 syz-executor
57852 418624 69091 0 3 0x2 0x80 nanoslp syz-executor
21620 374677 69091 0 3 0x2 0x80 nanoslp syz-executor
94507 282065 69091 0 3 0x2 0x80 nanoslp syz-executor
69091 516889 1 0 3 0x2 0x80 kqread syz-executor
*95630 418394 1 0 7 0x10000002 0 sshd
51484 146087 83960 73 3 0x1100010 0x80 kqread syslogd
83960 434526 1 0 3 0x100002 0x80 sbwait syslogd
58523 91563 1 0 3 0x100000 0x80 kqread resolvd
73582 252192 42675 77 3 0x100012 0x80 kqread dhcpleased
79468 43127 42675 77 3 0x100012 0x80 kqread dhcpleased
42675 470962 1 0 3 0 0x80 kqread dhcpleased
80907 109324 0 0 3 0x14000 0x200 bored smr
61104 316474 0 0 2 0x14000 0x200 zerothread
79297 76410 0 0 3 0x14000 0x200 aiodoned aiodoned
99447 83818 0 0 3 0x14000 0x200 syncer update
56623 142315 0 0 3 0x14000 0x200 cleaner cleaner
57193 167900 0 0 3 0x14000 0x200 reaper reaper
43272 48417 0 0 3 0x14000 0x200 pgdaemon pagedaemon
90320 373657 0 0 3 0x14000 0x200 bored viomb
56109 332086 0 0 3 0x14000 0x40000200 acpi0 acpi0
83149 186554 0 0 3 0x14000 0x200 bored softnet0
19837 415764 0 0 3 0x14000 0x200 bored systqmp
72900 175188 0 0 3 0x14000 0x200 bored systq
18835 308152 0 0 3 0x14000 0x40000200 tmoslp softclock
68271 228798 0 0 3 0x14000 0x40000200 idle0
1 329672 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11064 12110K 12280K 166960K 12334 0
pcb 18 13K 14K 166960K 103 0
rtable 253 8K 8K 166960K 400 0
pf 34 13K 20K 166960K 68 0
ifaddr 43 7K 7K 166960K 46 0
ifgroup 55 2K 2K 166960K 60 0
sysctl 3 1K 9K 166960K 9 0
counters 34 17K 18K 166960K 37 0
ioctlops 0 0K 4K 166960K 75 0
iov 0 0K 12K 166960K 76 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1301 82K 82K 166960K 1481 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 17 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 17 61K 97K 166960K 317 0
sigio 0 0K 0K 166960K 4 0
proc 51 50K 124K 166960K 510 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 27 0
in_multi 99 6K 7K 166960K 106 0
ether_multi 1 0K 0K 166960K 3 0
mrt 0 0K 0K 166960K 6 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 223 996K 996K 166960K 223 0
exec 0 0K 1K 166960K 381 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 189 121K 152K 166960K 4599 0
UVM aobj 7 2K 4K 166960K 8 0
pinsyscall 32 64K 96K 166960K 1427 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 2 0K 0K 166960K 10 0
NDP 12 0K 2K 166960K 29 0
temp 36 9112K 9122K 166960K 4323 0
kqueue 13 20K 28K 166960K 62 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 51 0 47 1 0 1 1 0 8 0
rtentry 136 118 0 6 4 0 4 4 0 8 0
unpcb 144 156 0 140 1 0 1 1 0 8 0
syncache 336 6 0 6 2 1 1 1 0 8 1
tcpcb 736 82 0 78 4 3 1 4 0 8 0
arp 96 19 0 1 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 1 0 0 1 0 1 1 0 8 0
inpcb 328 264 0 256 7 5 2 7 0 8 0
nd6 112 25 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1072 3 0 3 1 0 1 1 0 8 1
pfstscr 40 3 0 1 1 0 1 1 0 8 0
pfrktable 1344 2 0 2 1 1 0 1 0 8 0
pfanchor 1288 5 0 0 1 0 1 1 0 8 0
pftag 88 3 0 2 1 0 1 1 0 8 0
pfstitem 24 4 0 0 1 0 1 1 0 8 0
pfstkey 128 6 0 2 1 0 1 1 0 8 0
pfstate 384 3 0 1 1 0 1 1 0 8 0
pfrule 1360 5 0 5 1 1 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 455 0 2 29 0 29 29 0 8 0
art_table 40 458 0 2 5 0 5 5 0 8 0
art_node 32 117 0 15 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 72 14 0 4 1 0 1 1 0 8 0
shmpl 112 5 0 1 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 1883 0 423 92 0 92 92 0 8 0
ffsino 256 1883 0 423 92 0 92 92 0 8 0
nchpl 144 2324 0 624 64 0 64 64 0 8 0
rtmask 32 2 0 2 1 0 1 1 0 8 1
vnodes 216 2033 0 0 113 0 113 113 0 8 0
namei 1024 7551 0 7550 2 1 1 1 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
kstatmem 264 27 0 2 2 0 2 2 0 8 0
scsiplug 72 2 0 2 1 1 0 1 0 8 0
scxspl 216 7841 0 7841 3 2 1 3 1 8 1
plimitpl 152 124 0 109 1 0 1 1 0 8 0
sigapl 424 615 0 575 6 1 5 6 0 8 0
knotepl 120 10785 0 10742 26 15 11 19 0 8 8
kqueuepl 184 61 0 50 1 0 1 1 0 8 0
pipepl 304 138 0 111 3 0 3 3 0 8 0
fdescpl 448 602 0 576 5 1 4 5 0 8 0
filepl 120 3031 0 2815 10 1 9 9 0 8 1
lockfpl 104 53 0 51 1 0 1 1 0 8 0
lockfspl 48 25 0 23 1 0 1 1 0 8 0
sessionpl 144 35 0 27 1 0 1 1 0 8 0
pgrppl 48 45 0 29 1 0 1 1 0 8 0
ucredpl 104 410 0 397 1 0 1 1 0 8 0
zombiepl 144 577 0 575 2 1 1 1 0 8 0
processpl 1152 615 0 575 4 0 4 4 0 8 0
procpl 664 891 0 843 6 1 5 6 0 8 0
sockpl 552 481 0 453 8 5 3 8 0 8 0
mcl64k 65536 5 0 5 2 1 1 1 0 8 1
mcl8k 8192 9 0 9 2 1 1 1 0 8 1
mcl4k 4096 2771 0 2721 14 7 7 14 0 8 0
mcl2k 2048 252 0 251 1 0 1 1 0 8 0
mextrefs 64 111 0 110 1 0 1 1 0 8 0
mtagpl 96 5 0 5 1 1 0 1 0 8 0
mbufpl 256 8088 0 7945 25 7 18 18 0 8 6
bufpl 272 2657 0 102 171 0 171 171 0 8 0
anonpl 24 108993 0 106420 46 19 27 46 0 187 0
amapchunkpl 152 13990 0 13590 32 11 21 32 0 158 1
amappl16 200 1644 0 1619 14 11 3 14 0 8 0
amappl15 192 24 0 24 1 1 0 1 0 8 0
amappl14 184 410 0 410 1 0 1 1 0 8 1
amappl13 176 145 0 138 1 0 1 1 0 8 0
amappl12 168 851 0 828 2 0 2 2 0 8 0
amappl11 160 6 0 6 1 1 0 1 0 8 0
amappl10 152 61 0 51 1 0 1 1 0 8 0
amappl9 144 275 0 274 1 0 1 1 0 8 0
amappl8 136 116 0 114 1 0 1 1 0 8 0
amappl7 128 146 0 136 1 0 1 1 0 8 0
amappl6 120 148 0 147 1 0 1 1 0 8 0
amappl5 112 88 0 83 1 0 1 1 0 8 0
amappl4 104 275 0 259 1 0 1 1 0 8 0
amappl3 96 2560 0 2470 4 1 3 4 0 8 0
amappl2 88 535 0 492 2 0 2 2 0 8 0
amappl1 80 11075 0 10721 14 2 12 14 0 8 1
amappl 88 3863 0 3725 5 0 5 5 0 92 0
uvmvnodes 80 100 0 0 3 0 3 3 0 8 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 128 254 0 254 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 7 0 1 1 0 1 1 0 8 0
uaddrrnd 24 602 0 576 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 602 0 576 1 0 1 1 0 8 0
vmmpekpl 168 6715 0 6680 2 0 2 2 0 8 0
vmmpepl 168 46723 0 45317 92 11 81 91 0 357 7
vmsppl 368 601 0 576 4 1 3 4 0 8 0
rwobjpl 40 15964 0 15206 13 2 11 13 0 8 0
pdppl 4096 1210 0 1152 96 30 66 82 0 8 8
pvpl 32 278859 0 271894 116 25 91 116 0 265 12
pmappl 216 601 0 576 3 0 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 551 0 56 15 0 15 15 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198
ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259
ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325
ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403
VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210
vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180
doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163
sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065
syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x724c3a85dee0, count: -11
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198
ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259
ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325
ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403
VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210
vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180
doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163
sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065
syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x724c3a85dee0, count: -11
ddb>
---
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