panic: bad dir
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
257896 28989 0 0 0 0 syz-executor.1
*484077 28989 0 0 0x4000000 1K syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:212
ufs_dirbadentry(ffff800020c498c8,ffff800020c498c8,f557be14143621ad) at ufs_dirbadentry
VOP_LOOKUP(fffffd807efbd708,ffff800020c49ad0,ffff800020c49b20) at VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
vfs_lookup(ffff800020c49aa0) at vfs_lookup+0x575 sys/kern/vfs_lookup.c:523
namei(ffff800020c49aa0) at namei+0x45f sys/kern/vfs_lookup.c:224
sys_chdir(ffff800020b38270,ffff800020c49bd8,ffff800020c49c40) at sys_chdir+0x76 change_dir sys/kern/vfs_syscalls.c:856 [inline]
sys_chdir(ffff800020b38270,ffff800020c49bd8,ffff800020c49c40) at sys_chdir+0x76 sys/kern/vfs_syscalls.c:802
syscall(ffff800020c49cb0) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline]
syscall(ffff800020c49cb0) at syscall+0x552 sys/arch/amd64/amd64/trap.c:574
Xsyscall(6,0,fffffffffffffed6,0,1,7281799d330) at Xsyscall+0x128
end of kernel
end trace frame: 0x18, count: 6
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
bad dir
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:212
ufs_dirbadentry(ffff800020c498c8,ffff800020c498c8,f557be14143621ad) at ufs_dirbadentry
VOP_LOOKUP(fffffd807efbd708,ffff800020c49ad0,ffff800020c49b20) at VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
vfs_lookup(ffff800020c49aa0) at vfs_lookup+0x575 sys/kern/vfs_lookup.c:523
namei(ffff800020c49aa0) at namei+0x45f sys/kern/vfs_lookup.c:224
sys_chdir(ffff800020b38270,ffff800020c49bd8,ffff800020c49c40) at sys_chdir+0x76 change_dir sys/kern/vfs_syscalls.c:856 [inline]
sys_chdir(ffff800020b38270,ffff800020c49bd8,ffff800020c49c40) at sys_chdir+0x76 sys/kern/vfs_syscalls.c:802
syscall(ffff800020c49cb0) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline]
syscall(ffff800020c49cb0) at syscall+0x552 sys/arch/amd64/amd64/trap.c:574
Xsyscall(6,0,fffffffffffffed6,0,1,7281799d330) at Xsyscall+0x128
end of kernel
end trace frame: 0x18, count: -9
ddb{1}> show registers
rdi 0xffffffff816ce867 db_enter+0x17
rsi 0x2563 __ALIGN_SIZE+0x1563
rbp 0xffff800020c496e0
rbx 0xffff800020c49790
rdx 0x2564 __ALIGN_SIZE+0x1564
rcx 0xffff8000033be000
rax 0xffff8000033be000
r8 0xffffffff812d2ac3 kprintf+0x173
r9 0x1
r10 0x25
r11 0x1f6e0379bd1f430
r12 0x3000000008
r13 0xffff800020c496f0
r14 0x100
r15 0x1
rip 0xffffffff816ce868 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020c496d0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=484077 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=17, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020b38bd0,0xffffffff82341258
process=0xffff800020b8c9f0 user=0xffff800020c44000, vmspace=0xfffffd807effe708
estcpu=27, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
28989 257896 7508 0 7 0 syz-executor.1
28989 313239 7508 0 3 0x4000000 biowait syz-executor.1
28989 387437 7508 0 3 0x4000000 inode syz-executor.1
28989 235861 7508 0 3 0x4000000 inode syz-executor.1
28989 65450 7508 0 3 0x4000000 inode syz-executor.1
*28989 484077 7508 0 7 0x4000000 syz-executor.1
7508 169588 66439 0 3 0x82 nanosleep syz-executor.1
20646 486186 66439 0 3 0x2 biowait syz-executor.0
66439 340365 35854 0 3 0x82 thrsleep syz-fuzzer
66439 479416 35854 0 3 0x4000082 nanosleep syz-fuzzer
66439 345465 35854 0 3 0x4000082 thrsleep syz-fuzzer
66439 204400 35854 0 3 0x4000082 thrsleep syz-fuzzer
66439 463676 35854 0 3 0x4000082 thrsleep syz-fuzzer
66439 185298 35854 0 3 0x4000082 thrsleep syz-fuzzer
66439 332499 35854 0 3 0x4000082 thrsleep syz-fuzzer
66439 198876 35854 0 3 0x4000082 thrsleep syz-fuzzer
66439 307693 35854 0 3 0x4000082 thrsleep syz-fuzzer
66439 41984 35854 0 3 0x4000082 kqread syz-fuzzer
66439 301243 35854 0 3 0x4000082 thrsleep syz-fuzzer
35854 235025 45758 0 3 0x10008a pause ksh
45758 179545 27212 0 3 0x92 select sshd
75012 372576 1 0 3 0x100083 ttyin getty
27212 407178 1 0 3 0x80 select sshd
11761 478711 97566 74 3 0x100092 bpf pflogd
97566 420821 1 0 3 0x80 netio pflogd
39877 291281 64019 73 2 0x100090 syslogd
64019 305388 1 0 3 0x100082 netio syslogd
33267 79201 1 77 3 0x100090 poll dhclient
2288 249634 1 0 3 0x80 poll dhclient
64980 431937 0 0 3 0x14200 pgzero zerothread
5445 301722 0 0 3 0x14200 aiodoned aiodoned
7850 322060 0 0 3 0x14200 syncer update
80219 337622 0 0 3 0x14200 cleaner cleaner
62656 116243 0 0 3 0x14200 reaper reaper
63631 53737 0 0 3 0x14200 pgdaemon pagedaemon
33656 143450 0 0 3 0x14200 bored crynlk
22150 110376 0 0 3 0x14200 bored crypto
71113 91078 0 0 3 0x40014200 acpi0 acpi0
2918 110552 0 0 3 0x40014200 idle1
94861 516301 0 0 3 0x14200 bored softnet
95790 159443 0 0 3 0x14200 bored systqmp
6723 49795 0 0 3 0x14200 bored systq
16108 459020 0 0 3 0x40014200 bored softclock
64838 299443 0 0 3 0x40014200 idle0
87115 453489 0 0 3 0x14200 bored smr
1 448609 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 28989 (syz-executor.1) thread 0xffff800020b38720 (313239)
exclusive rrwlock inode r = 0 (0xfffffd806c2afd60)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1161
#1 rw_enter+0x414 sys/kern/kern_rwlock.c:278
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:407
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_write+0x169 vn_lock sys/kern/vfs_vnops.c:549 [inline]
#4 vn_write+0x169 sys/kern/vfs_vnops.c:393
#5 dofilewritev+0x1a9 sys/kern/sys_generic.c:364
#6 sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3161
#7 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#7 syscall+0x552 sys/arch/amd64/amd64/trap.c:574
#8 Xsyscall+0x128
Process 28989 (syz-executor.1) thread 0xffff800020b38978 (387437)
exclusive rrwlock inode r = 0 (0xfffffd806c2afb40)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1161
#1 rw_enter+0x414 sys/kern/kern_rwlock.c:278
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:407
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_lock+0x6e sys/kern/vfs_vnops.c:549
#5 vfs_lookup+0xec sys/kern/vfs_lookup.c:387
#6 namei+0x45f sys/kern/vfs_lookup.c:224
#7 dorenameat+0x7b sys/kern/vfs_syscalls.c:2758
#8 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#8 syscall+0x552 sys/arch/amd64/amd64/trap.c:574
#9 Xsyscall+0x128
Process 28989 (syz-executor.1) thread 0xffff800020b38270 (484077)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82390318)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1161
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x38c sys/kern/sched_bsd.c:439
#3 sleep_finish+0x110 sys/kern/kern_synch.c:303
#4 sleep_finish_all+0x34 sleep_finish_timeout sys/kern/kern_synch.c:327 [inline]
#4 sleep_finish_all+0x34 sys/kern/kern_synch.c:157
#5 tsleep+0x195 sys/kern/kern_synch.c:149
#6 biowait+0xa1 sys/kern/vfs_bio.c:1228
#7 ffs_bufatoff+0x14f sys/ufs/ffs/ffs_subr.c:71
#8 ufs_lookup+0x48d sys/ufs/ufs/ufs_lookup.c:258
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x575 sys/kern/vfs_lookup.c:523
#11 namei+0x45f sys/kern/vfs_lookup.c:224
#12 sys_chdir+0x76 change_dir sys/kern/vfs_syscalls.c:856 [inline]
#12 sys_chdir+0x76 sys/kern/vfs_syscalls.c:802
#13 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#13 syscall+0x552 sys/arch/amd64/amd64/trap.c:574
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd807ed14f78)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1161
#1 rw_enter+0x414 sys/kern/kern_rwlock.c:278
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:407
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_lock+0x6e sys/kern/vfs_vnops.c:549
#5 vfs_lookup+0xec sys/kern/vfs_lookup.c:387
#6 namei+0x45f sys/kern/vfs_lookup.c:224
#7 sys_chdir+0x76 change_dir sys/kern/vfs_syscalls.c:856 [inline]
#7 sys_chdir+0x76 sys/kern/vfs_syscalls.c:802
#8 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#8 syscall+0x552 sys/arch/amd64/amd64/trap.c:574
#9 Xsyscall+0x128
Process 20646 (syz-executor.0) thread 0xffff800020b14008 (486186)
exclusive rrwlock inode r = 0 (0xfffffd806c2afa30)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1161
#1 rw_enter+0x414 sys/kern/kern_rwlock.c:278
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:407
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_lock+0x6e sys/kern/vfs_vnops.c:549
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323
#8 ufs_lookup+0x1575 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x575 sys/kern/vfs_lookup.c:523
#11 namei+0x45f sys/kern/vfs_lookup.c:224
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1673
#13 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#13 syscall+0x552 sys/arch/amd64/amd64/trap.c:574
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806c2af920)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1161
#1 rw_enter+0x414 sys/kern/kern_rwlock.c:278
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:407
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_lock+0x6e sys/kern/vfs_vnops.c:549
#5 vfs_lookup+0xec sys/kern/vfs_lookup.c:387
#6 namei+0x45f sys/kern/vfs_lookup.c:224
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1673
#8 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#8 syscall+0x552 sys/arch/amd64/amd64/trap.c:574
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9474 6390K 6904K 78643K 10898 0 0
pcb 25 9K 10K 78643K 123 0 0
rtable 108 4K 4K 78643K 242 0 0
ifaddr 43 11K 11K 78643K 67 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1473 0 0
iov 1 12K 16K 78643K 11 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1202 75K 75K 78643K 1318 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 5 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 1K 1K 78643K 17 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12628 0 0
file desc 5 13K 25K 78643K 164 0 0
proc 53 50K 91K 78643K 365 0 0
subproc 64 65538K 69634K 78643K 68 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 4 0 0
in_multi 33 2K 2K 78643K 33 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 48 212K 212K 78643K 48 0 0
exec 0 0K 1K 78643K 217 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 89 20K 21K 78643K 1382 0 0
UVM aobj 10 2K 2K 78643K 14 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 10 0 0
NDP 7 0K 0K 78643K 17 0 0
temp 100 2717K 2845K 78643K 6131 0 0
kqueue 0 0K 0K 78643K 6 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 6 0 0 1 0 1 1 0 8 0
inpcbpl 280 107 0 100 1 0 1 1 0 8 0
plimitpl 152 19 0 11 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtentry 112 45 0 1 2 0 2 2 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpcb 544 38 0 34 1 0 1 1 0 8 0
nd6 48 6 0 0 1 0 1 1 0 8 0
ppxss 1128 4 0 4 1 0 1 1 0 8 1
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 13 0 3 1 0 1 1 0 8 0
pfstkey 112 13 0 3 1 0 1 1 0 8 0
pfstate 328 13 0 3 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 256 189 0 0 12 0 12 12 0 8 0
art_table 32 190 0 0 2 0 2 2 0 8 0
art_node 16 44 0 4 1 0 1 1 0 8 0
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 112 13 0 3 1 0 1 1 0 8 0
shmpl 112 12 0 4 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1644 0 229 46 0 46 46 0 8 0
ffsino 272 1644 0 229 95 0 95 95 0 8 0
nchpl 144 2045 0 408 61 0 61 61 0 8 0
uvmvnodes 72 1766 0 0 33 0 33 33 0 8 0
vnodes 200 1766 0 0 93 0 93 93 0 8 0
namei 1024 5532 0 5528 2 1 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 12675 0 12673 7 6 1 6 0 8 0
sigapl 432 363 0 348 3 1 2 3 0 8 0
futexpl 56 1729 0 1729 1 0 1 1 0 8 1
knotepl 112 93 0 74 2 1 1 2 0 8 0
kqueuepl 104 53 0 51 1 0 1 1 0 8 0
pipepl 112 210 0 191 2 1 1 1 0 8 0
fdescpl 488 364 0 348 3 0 3 3 0 8 0
filepl 152 1870 0 1769 5 0 5 5 0 8 1
lockfpl 104 63 0 62 2 1 1 1 0 8 0
lockfspl 48 23 0 22 2 1 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 20 0 9 1 0 1 1 0 8 0
ucredpl 96 193 0 184 1 0 1 1 0 8 0
zombiepl 144 348 0 348 3 2 1 1 0 8 1
processpl 840 379 0 348 4 0 4 4 0 8 0
procpl 600 678 0 632 4 0 4 4 0 8 0
sockpl 384 203 0 184 4 1 3 3 0 8 1
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 6 0 0 1 0 1 1 0 8 0
mcl2k 2048 119 0 0 14 0 14 14 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 155 0 0 9 0 9 9 0 8 0
bufpl 256 19308 0 13097 392 0 392 392 0 8 0
anonpl 16 55929 0 45290 61 2 59 59 0 125 15
amapchunkpl 152 1984 0 1874 9 3 6 9 0 158 0
amappl16 192 1973 0 1407 47 8 39 40 0 8 10
amappl14 176 106 0 100 2 1 1 1 0 8 0
amappl13 168 6 0 6 1 1 0 1 0 8 0
amappl12 160 12 0 10 1 0 1 1 0 8 0
amappl11 152 115 0 95 2 1 1 2 0 8 0
amappl10 144 70 0 67 1 0 1 1 0 8 0
amappl9 136 595 0 592 1 0 1 1 0 8 0
amappl8 128 141 0 128 1 0 1 1 0 8 0
amappl7 120 33 0 31 1 0 1 1 0 8 0
amappl6 112 116 0 110 1 0 1 1 0 8 0
amappl5 104 122 0 109 1 0 1 1 0 8 0
amappl4 96 545 0 512 2 1 1 2 0 8 0
amappl3 88 265 0 254 1 0 1 1 0 8 0
amappl2 80 1908 0 1851 3 1 2 2 0 8 0
amappl1 72 17490 0 17050 25 15 10 20 0 8 0
amappl 72 941 0 898 1 0 1 1 0 75 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 13 0 4 1 0 1 1 0 8 0
uaddrrnd 24 364 0 348 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 364 0 348 1 0 1 1 0 8 0
vmmpekpl 168 6889 0 6864 2 0 2 2 0 8 0
vmmpepl 168 47483 0 45912 121 18 103 110 0 357 29
vmsppl 360 363 0 348 2 0 2 2 0 8 0
pdppl 4096 736 0 696 6 0 6 6 0 8 0
pvpl 32 176625 0 162826 156 6 150 150 0 265 33
pmappl 232 363 0 348 2 1 1 2 0 8 0
extentpl 40 39 0 25 1 0 1 1 0 8 0
phpool 112 541 0 4 16 0 16 16 0 8 0