panic: missing alias
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*390309 34146 0 0x2 0 0 syz-executor.6
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff827593c4) at panic+0x161 sys/kern/subr_prf.c:198
vgonel(fffffd8067794880,ffff8000fffed078) at vgonel+0x4d5 sys/kern/vfs_subr.c:1200
checkalias(fffffd8067794e68,ffffffffac2a5bfd,ffff8000006db000) at checkalias+0x13c
ffs_vinit(ffff8000006db000,ffff800029a424b0) at ffs_vinit+0x10c sys/ufs/ffs/ffs_subr.c:266
ffs_vget(ffff8000006db000,134de,ffff800029a42588) at ffs_vget+0x375 sys/ufs/ffs/ffs_vfsops.c:1409
ufs_lookup() at ufs_lookup+0x1229 sys/ufs/ufs/ufs_lookup.c:582
VOP_LOOKUP(fffffd80794ddbe8,ffff800029a42818,ffff800029a42848) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85
vfs_lookup(ffff800029a427e8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566
namei(ffff800029a427e8) at namei+0x55a sys/kern/vfs_lookup.c:250
dofstatat(ffff8000fffed078,ffffff9c,7f7ffffd4e00,7f7ffffd5200,2) at dofstatat+0xab sys/kern/vfs_syscalls.c:2080
syscall(ffff800029a42a60) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd52b0, count: 2
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: missing alias
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff827593c4) at panic+0x161 sys/kern/subr_prf.c:198
vgonel(fffffd8067794880,ffff8000fffed078) at vgonel+0x4d5 sys/kern/vfs_subr.c:1200
checkalias(fffffd8067794e68,ffffffffac2a5bfd,ffff8000006db000) at checkalias+0x13c
ffs_vinit(ffff8000006db000,ffff800029a424b0) at ffs_vinit+0x10c sys/ufs/ffs/ffs_subr.c:266
ffs_vget(ffff8000006db000,134de,ffff800029a42588) at ffs_vget+0x375 sys/ufs/ffs/ffs_vfsops.c:1409
ufs_lookup() at ufs_lookup+0x1229 sys/ufs/ufs/ufs_lookup.c:582
VOP_LOOKUP(fffffd80794ddbe8,ffff800029a42818,ffff800029a42848) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85
vfs_lookup(ffff800029a427e8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566
namei(ffff800029a427e8) at namei+0x55a sys/kern/vfs_lookup.c:250
dofstatat(ffff8000fffed078,ffffff9c,7f7ffffd4e00,7f7ffffd5200,2) at dofstatat+0xab sys/kern/vfs_syscalls.c:2080
syscall(ffff800029a42a60) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd52b0, count: -13
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff800029a422b0
rbx 0
rdx 0
rcx 0
rax 0xffff8000fffed078
r8 0x101010101010101
r9 0x8080808080808080
r10 0x27db94b1dd5498c0
r11 0x172904599e151e92
r12 0
r13 0xfffffd8067794880
r14 0
r15 0x1
rip 0xffffffff81a69eb8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800029a422a0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.6) pid=390309 stat=onproc
flags process=2<EXEC> proc=0
pri=82, usrpri=82, nice=20
forw=0xffffffffffffffff, list=0xffff800021726b10,0xffff8000fffed340
process=0xffff800021720000 user=0xffff800029a3d000, vmspace=0xfffffd807e42a2b8
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
92206 133844 41239 0 2 0 syz-executor.1
92206 229104 41239 0 2 0x4000000 syz-executor.1
65568 394538 42305 0 2 0 syz-executor.2
41239 259275 41402 0 3 0x82 nanoslp syz-executor.1
*34146 390309 41402 0 7 0x2 syz-executor.6
53492 396871 41402 0 2 0x2 syz-executor.5
42305 514541 41402 0 3 0x82 nanoslp syz-executor.2
18765 480733 0 0 3 0x14200 bored sosplice
70131 99488 41402 0 2 0x2 syz-executor.7
43699 307733 41402 0 2 0x2 syz-executor.4
45478 42424 41402 0 2 0x2 syz-executor.0
2223 334485 41402 0 2 0x2 syz-executor.3
41402 204163 28153 0 3 0x82 wait syz-fuzzer
41402 7975 28153 0 3 0x4000082 thrsleep syz-fuzzer
41402 94736 28153 0 3 0x4000082 wait syz-fuzzer
41402 402280 28153 0 3 0x4000082 thrsleep syz-fuzzer
41402 11129 28153 0 3 0x4000082 wait syz-fuzzer
41402 206943 28153 0 3 0x4000082 kqread syz-fuzzer
41402 581 28153 0 3 0x4000082 wait syz-fuzzer
41402 340444 28153 0 3 0x4000082 thrsleep syz-fuzzer
41402 483734 28153 0 3 0x4000082 wait syz-fuzzer
41402 133892 28153 0 3 0x4000082 thrsleep syz-fuzzer
41402 258756 28153 0 3 0x4000082 thrsleep syz-fuzzer
41402 264438 28153 0 3 0x4000082 wait syz-fuzzer
41402 64459 28153 0 3 0x4000082 wait syz-fuzzer
41402 495007 28153 0 3 0x4000082 wait syz-fuzzer
28153 508555 76880 0 3 0x10008a sigsusp ksh
76880 293500 26059 0 3 0x9a kqread sshd
5381 142910 1 0 3 0x100083 ttyin getty
26059 321907 1 0 3 0x88 kqread sshd
75461 406457 72916 73 3 0x1100090 kqread syslogd
72916 187079 1 0 3 0x100082 netio syslogd
71799 84111 1 0 3 0x100080 kqread resolvd
18644 394371 5570 77 3 0x100092 kqread dhcpleased
1153 73742 5570 77 3 0x100092 kqread dhcpleased
5570 433670 1 0 3 0x80 kqread dhcpleased
21540 266572 0 0 3 0x14200 bored smr
64365 401655 0 0 2 0x14200 zerothread
76944 272967 0 0 3 0x14200 aiodoned aiodoned
64355 253183 0 0 3 0x14200 syncer update
20406 432157 0 0 3 0x14200 cleaner cleaner
93697 441713 0 0 3 0x14200 reaper reaper
9477 90729 0 0 3 0x14200 pgdaemon pagedaemon
24865 68431 0 0 3 0x14200 bored viomb
87611 486710 0 0 3 0x40014200 acpi0 acpi0
20115 47338 0 0 3 0x14200 bored softnet
42908 479655 0 0 3 0x14200 bored softnet
5272 482457 0 0 3 0x14200 bored softnet
32847 401571 0 0 3 0x14200 bored softnet
59605 79496 0 0 3 0x14200 bored systqmp
51835 327482 0 0 3 0x14200 bored systq
19708 8022 0 0 3 0x40014200 bored softclock
80860 178413 0 0 3 0x40014200 idle0
1 389906 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
devbuf 10227 6426K 6823K 78643K 17102 0
pcb 13 16K 18K 78643K 184 0
rtable 236 15K 15K 78643K 620 0
ifaddr 76 21K 21K 78643K 289 0
counters 28 17K 17K 78643K 100 0
ioctlops 0 0K 2K 78643K 511 0
iov 0 0K 16K 78643K 264 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1402 88K 88K 78643K 6353 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 14 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 1402 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 12 41K 73K 78643K 3601 0
sigio 0 0K 0K 78643K 9 0
proc 58 59K 75K 78643K 605 0
subproc 104 6K 6K 78643K 156 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 19 0
in_multi 99 6K 7K 78643K 239 0
ether_multi 1 0K 0K 78643K 13 0
mrt 1 0K 0K 78643K 4 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 271 1208K 1208K 78643K 271 0
exec 0 0K 1K 78643K 557 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 257 82K 84K 78643K 25788 0
UVM aobj 67 3K 3K 78643K 67 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 31 0
NDP 12 0K 2K 78643K 87 0
temp 128 5770K 5898K 78643K 23442 0
kqueue 12 18K 26K 78643K 145 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 109 0 106 2 1 1 2 0 8 0
rtentry 112 217 0 109 4 0 4 4 0 8 0
unpcb 144 2942 0 2929 48 47 1 6 0 8 0
syncache 296 16 0 16 4 4 0 1 0 8 0
sackhl 24 1 0 1 1 1 0 1 0 8 0
tcpqe 32 209 0 209 2 2 0 1 0 8 0
tcpcb 776 434 0 430 18 17 1 14 0 8 0
arp 88 26 0 8 1 0 1 1 0 8 0
inpcb 336 1289 0 1282 27 26 1 13 0 8 0
nd6 48 43 0 21 1 0 1 1 0 8 0
pkpcb 40 3 0 3 1 1 0 1 0 8 0
kcovpl 48 12 0 4 1 0 1 1 0 8 0
ppxss 1160 34 0 34 4 4 0 1 0 8 0
pppxif 1360 28 0 28 4 4 0 1 0 8 0
pfstscr 40 35 0 34 1 0 1 1 0 8 0
pfanchor 1280 8 0 8 2 2 0 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfqueue 264 3 0 0 1 0 1 1 0 8 0
pfstitem 24 2 0 0 1 0 1 1 0 8 0
pfstkey 128 76 0 74 2 1 1 1 0 8 0
pfstate 352 38 0 37 2 1 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1010 0 564 35 7 28 29 0 8 0
art_table 32 1011 0 564 4 0 4 4 0 8 0
art_node 16 216 0 118 1 0 1 1 0 8 0
sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 1400 0 1390 1 0 1 1 0 8 0
shmpl 112 64 0 0 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 10400 0 8966 90 0 90 90 0 8 0
ffsino 240 10400 0 8966 85 0 85 85 0 8 0
nchpl 144 15330 0 13703 63 0 63 63 0 8 0
uvmvnodes 80 5927 0 0 121 0 121 121 0 8 0
vnodes 216 5927 0 0 330 0 330 330 0 8 0
namei 1024 57019 0 57015 17 16 1 4 0 8 0
vmpool 664 6 0 6 2 2 0 1 0 8 0
kstatmem 264 112 0 88 2 0 2 2 0 8 0
scxspl 216 32010 0 32010 10 9 1 8 0 8 1
plimitpl 152 564 0 549 1 0 1 1 0 8 0
sigapl 424 3888 0 3848 6 0 6 6 0 8 0
futexpl 64 31707 0 31707 1 0 1 1 0 8 1
knotepl 120 39905 0 39825 23 18 5 16 0 8 0
kqueuepl 184 412 0 404 7 6 1 4 0 8 0
pipepl 288 606 0 578 18 11 7 7 0 8 4
fdescpl 432 3871 0 3848 4 0 4 4 0 8 0
filepl 120 34210 0 33974 75 63 12 15 0 8 4
lockfpl 104 647 0 645 2 1 1 2 0 8 0
lockfspl 48 223 0 221 1 0 1 1 0 8 0
sessionpl 144 27 0 11 1 0 1 1 0 8 0
pgrppl 48 106 0 90 1 0 1 1 0 8 0
ucredpl 104 16094 0 16084 1 0 1 1 0 8 0
zombiepl 144 5741 0 5741 2 1 1 1 0 8 1
processpl 1008 3888 0 3848 7 1 6 6 0 8 0
procpl 696 9970 0 9916 14 7 7 8 0 8 0
sosppl 168 15 0 15 3 3 0 1 0 8 0
sockpl 456 4343 0 4320 173 169 4 28 0 8 1
mcl64k 65536 110 0 110 17 16 1 1 0 8 1
mcl16k 16384 67 0 67 12 11 1 1 0 8 1
mcl12k 12288 129 0 129 16 15 1 1 0 8 1
mcl9k 9216 37 0 37 11 10 1 1 0 8 1
mcl8k 8192 100 0 100 18 18 0 1 0 8 0
mcl4k 4096 258 0 258 16 15 1 1 0 8 1
mcl2k2 2112 20 0 20 11 11 0 1 0 8 0
mcl2k 2048 82785 0 82711 52 41 11 38 0 8 0
mtagpl 96 216 0 81 6 1 5 5 0 8 0
mbufpl 256 152949 0 152550 90 56 34 78 0 8 0
bufpl 288 8283 0 1889 458 1 457 457 0 8 0
anonpl 24 759114 0 741711 131 18 113 126 0 188 0
amapchunkpl 152 71892 0 71229 53 23 30 36 0 158 0
amappl16 200 5833 0 5224 36 1 35 35 0 8 0
amappl15 192 6 0 6 1 1 0 1 0 8 0
amappl14 184 187 0 174 2 1 1 2 0 8 0
amappl13 176 7 0 7 1 1 0 1 0 8 0
amappl12 168 441 0 439 1 0 1 1 0 8 0
amappl11 160 50 0 38 1 0 1 1 0 8 0
amappl10 152 39 0 31 1 0 1 1 0 8 0
amappl9 144 983 0 982 1 0 1 1 0 8 0
amappl8 136 187 0 139 2 0 2 2 0 8 0
amappl7 128 168 0 145 2 0 2 2 0 8 0
amappl6 120 192 0 182 2 1 1 2 0 8 0
amappl5 112 179 0 173 1 0 1 1 0 8 0
amappl4 104 537 0 513 2 1 1 2 0 8 0
amappl3 96 11136 0 11095 2 0 2 2 0 8 0
amappl2 88 4293 0 4226 3 0 3 3 0 8 0
amappl1 80 89908 0 89278 29 13 16 26 0 8 0
amappl 88 25243 0 25093 5 0 5 5 0 92 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 128 253 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 72 66 0 0 2 0 2 2 0 8 0
uaddrrnd 24 3877 0 3854 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 3877 0 3854 1 0 1 1 0 8 0
vmmpekpl 168 32486 0 32434 3 0 3 3 0 8 0
vmmpepl 168 353883 0 351506 241 118 123 156 0 357 0
vmsppl 344 3876 0 3854 3 0 3 3 0 8 0
rwobjpl 24 99377 0 91773 47 0 47 47 0 8 0
pdppl 4096 7760 0 7708 347 283 64 68 0 8 12
pvpl 32 1498979 0 1476666 359 165 194 333 0 265 0
pmappl 216 3876 0 3854 2 0 2 2 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1293 0 507 24 1 23 23 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff827593c4) at panic+0x161 sys/kern/subr_prf.c:198
vgonel(fffffd8067794880,ffff8000fffed078) at vgonel+0x4d5 sys/kern/vfs_subr.c:1200
checkalias(fffffd8067794e68,ffffffffac2a5bfd,ffff8000006db000) at checkalias+0x13c
ffs_vinit(ffff8000006db000,ffff800029a424b0) at ffs_vinit+0x10c sys/ufs/ffs/ffs_subr.c:266
ffs_vget(ffff8000006db000,134de,ffff800029a42588) at ffs_vget+0x375 sys/ufs/ffs/ffs_vfsops.c:1409
ufs_lookup() at ufs_lookup+0x1229 sys/ufs/ufs/ufs_lookup.c:582
VOP_LOOKUP(fffffd80794ddbe8,ffff800029a42818,ffff800029a42848) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85
vfs_lookup(ffff800029a427e8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566
namei(ffff800029a427e8) at namei+0x55a sys/kern/vfs_lookup.c:250
dofstatat(ffff8000fffed078,ffffff9c,7f7ffffd4e00,7f7ffffd5200,2) at dofstatat+0xab sys/kern/vfs_syscalls.c:2080
syscall(ffff800029a42a60) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd52b0, count: -13
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff827593c4) at panic+0x161 sys/kern/subr_prf.c:198
vgonel(fffffd8067794880,ffff8000fffed078) at vgonel+0x4d5 sys/kern/vfs_subr.c:1200
checkalias(fffffd8067794e68,ffffffffac2a5bfd,ffff8000006db000) at checkalias+0x13c
ffs_vinit(ffff8000006db000,ffff800029a424b0) at ffs_vinit+0x10c sys/ufs/ffs/ffs_subr.c:266
ffs_vget(ffff8000006db000,134de,ffff800029a42588) at ffs_vget+0x375 sys/ufs/ffs/ffs_vfsops.c:1409
ufs_lookup() at ufs_lookup+0x1229 sys/ufs/ufs/ufs_lookup.c:582
VOP_LOOKUP(fffffd80794ddbe8,ffff800029a42818,ffff800029a42848) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85
vfs_lookup(ffff800029a427e8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566
namei(ffff800029a427e8) at namei+0x55a sys/kern/vfs_lookup.c:250
dofstatat(ffff8000fffed078,ffffff9c,7f7ffffd4e00,7f7ffffd5200,2) at dofstatat+0xab sys/kern/vfs_syscalls.c:2080
syscall(ffff800029a42a60) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd52b0, count: -13