panic: missing alias
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 36060 51814 0 0x2 0 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833a9d60) at panic+0x1cf sys/kern/subr_prf.c:198
vgonel(fffffd806ab482c8,ffff80002a78a540) at vgonel+0x663
vrecycle(fffffd806ab482c8,ffff80002a78a540) at vrecycle+0x7c sys/kern/vfs_subr.c:1136
ufs_inactive(ffff80002a7eb060) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107
VOP_INACTIVE(fffffd806ab482c8,ffff80002a78a540) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498
vput(fffffd806ab482c8) at vput+0xdc sys/kern/vfs_subr.c:789
VOP_REMOVE(fffffd806872fe90,fffffd806ab482c8,ffff80002a7eb1c8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336
dounlinkat(ffff80002a78a540,ffffff9c,713643c803e0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923
syscall(ffff80002a7eb330) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7eb330) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x713643c80890, 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: missing alias
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833a9d60) at panic+0x1cf sys/kern/subr_prf.c:198
vgonel(fffffd806ab482c8,ffff80002a78a540) at vgonel+0x663
vrecycle(fffffd806ab482c8,ffff80002a78a540) at vrecycle+0x7c sys/kern/vfs_subr.c:1136
ufs_inactive(ffff80002a7eb060) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107
VOP_INACTIVE(fffffd806ab482c8,ffff80002a78a540) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498
vput(fffffd806ab482c8) at vput+0xdc sys/kern/vfs_subr.c:789
VOP_REMOVE(fffffd806872fe90,fffffd806ab482c8,ffff80002a7eb1c8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336
dounlinkat(ffff80002a78a540,ffffff9c,713643c803e0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923
syscall(ffff80002a7eb330) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7eb330) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x713643c80890, count: -11
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a7eaea0
rbx 0xfffffd806ab482c8
rdx 0
rcx 0
rax 0xffff80002a78a540
r8 0x101010101010101
r9 0x8080808080808080
r10 0xa3ea2b95ff97773e
r11 0xa574a71a98ae038a
r12 0
r13 0x2909 __ALIGN_SIZE+0x1909
r14 0
r15 0x1
rip 0xffffffff829f54b5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a7eae90
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor) tid=36060 pid=51814 tcnt=1 stat=onproc
flags process=2<EXEC> proc=0
runpri=17, usrpri=50, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a78a010,0xffff80002a78ba10
process=0xffff80002a784d90 user=0xffff80002a7e6000, vmspace=0xfffffd807ecdc170
estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
78795 194889 49417 0 2 0 syz-executor
78795 489755 49417 0 2 0x4000000 syz-executor
78795 391301 49417 0 3 0x4000000 inode syz-executor
43323 276637 79074 0 2 0 syz-executor
43323 282256 79074 0 2 0x4000000 syz-executor
23443 222707 7805 0 2 0 syz-executor
23443 357199 7805 0 3 0x4000080 fsleep syz-executor
76847 123031 84767 0 3 0x80 nanoslp syz-executor
76847 301465 84767 0 3 0x4000080 pipewr syz-executor
76847 252260 84767 0 3 0x4000080 fsleep syz-executor
76847 291977 84767 0 3 0x4000080 fsleep syz-executor
67788 215514 49133 60929 3 0x90 nanoslp syz-executor
67788 24455 49133 60929 3 0x4000090 ttyout syz-executor
67788 140666 49133 60929 3 0x4000090 fsleep syz-executor
67788 364226 49133 60929 3 0x4000090 fsleep syz-executor
27484 306790 97189 0 3 0x3000 suspend syz-executor
27484 298213 97189 0 2 0x4081000 syz-executor
27484 40859 97189 0 3 0x4081000 inode syz-executor
27484 444328 97189 0 3 0x4081000 inode syz-executor
44985 191684 0 0 3 0x14200 acct acct
97189 11110 40504 0 3 0x82 wait syz-executor
84767 439017 40504 0 3 0x82 nanoslp syz-executor
79074 454087 40504 0 3 0x82 nanoslp syz-executor
49133 131253 40504 0 3 0x82 nanoslp syz-executor
49417 342053 40504 0 3 0x82 nanoslp syz-executor
7805 59090 40504 0 3 0x82 nanoslp syz-executor
35449 378990 40504 0 2 0x2 syz-executor
*51814 36060 40504 0 7 0x2 syz-executor
40504 126483 54407 0 3 0x82 kqread syz-executor
54407 386020 71049 0 3 0x10008a sigsusp ksh
71049 69395 20520 0 3 0x98 kqread sshd-session
20520 130115 38154 0 3 0x92 kqread sshd-session
40137 124802 1 0 3 0x100083 ttyin getty
38154 52135 1 0 3 0x88 kqread sshd
94208 185558 65254 73 3 0x1100090 kqread syslogd
65254 339298 1 0 3 0x100082 sbwait syslogd
86310 437642 1 0 3 0x100080 kqread resolvd
32951 60925 76181 77 3 0x100092 kqread dhcpleased
94427 282777 76181 77 3 0x100092 kqread dhcpleased
76181 356158 1 0 3 0x80 kqread dhcpleased
27172 438353 0 0 3 0x14200 bored smr
19535 173678 0 0 2 0x14200 zerothread
57740 499479 0 0 3 0x14200 aiodoned aiodoned
72611 345700 0 0 3 0x14200 syncer update
45007 287709 0 0 3 0x14200 cleaner cleaner
78982 514041 0 0 3 0x14200 reaper reaper
59725 77911 0 0 3 0x14200 pgdaemon pagedaemon
85697 371403 0 0 3 0x14200 bored viomb
81221 1230 0 0 3 0x40014200 acpi0 acpi0
50931 491152 0 0 3 0x14200 bored softnet0
51331 154603 0 0 3 0x14200 bored systqmp
79133 178926 0 0 3 0x14200 bored systq
99767 493613 0 0 3 0x40014200 tmoslp softclock
53825 27825 0 0 3 0x40014200 idle0
1 418760 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 11037 12168K 12302K 166960K 12321 0
pcb 18 14K 15K 166960K 61 0
rtable 262 9K 9K 166960K 418 0
pf 30 12K 19K 166960K 131 0
ifaddr 42 7K 8K 166960K 60 0
ifgroup 50 2K 2K 166960K 82 0
sysctl 3 1K 9K 166960K 8 0
counters 33 17K 18K 166960K 47 0
ioctlops 0 0K 4K 166960K 141 0
iov 0 0K 24K 166960K 4 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1294 81K 82K 166960K 1494 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 8 0K 0K 166960K 9 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 16 57K 93K 166960K 313 0
sigio 0 0K 0K 166960K 1 0
proc 59 59K 100K 166960K 518 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 22 0
in_multi 99 7K 7K 166960K 107 0
ether_multi 1 0K 0K 166960K 2 0
mrt 0 0K 0K 166960K 11 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 61 281K 281K 166960K 61 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 222 150K 169K 166960K 4555 0
UVM aobj 10 4K 4K 166960K 11 0
pinsyscall 37 74K 94K 166960K 1404 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 5 0
NDP 11 0K 1K 166960K 39 0
temp 38 9062K 9130K 166960K 14677 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 48 1 0 1 1 0 8 0
rtentry 136 115 0 3 4 0 4 4 0 8 0
unpcb 144 178 0 163 4 0 4 4 0 8 3
syncache 336 4 0 4 2 1 1 1 0 8 1
tcpqe 32 1 0 1 1 0 1 1 0 8 1
tcpcb 736 82 0 77 4 0 4 4 0 8 3
arp 96 18 0 0 1 0 1 1 0 8 0
ipq 40 7 0 1 1 0 1 1 0 8 0
ipqe 40 11 0 3 1 0 1 1 0 8 0
inpcb 328 342 0 332 7 0 7 7 0 8 5
nd6 112 25 0 0 1 0 1 1 0 8 0
pkpcb 40 2 0 2 2 1 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1072 11 0 11 2 1 1 1 0 8 1
pppxif 1416 2 0 2 2 1 1 1 0 8 1
pfsrclim 320 1 0 1 1 0 1 1 0 8 1
pfrule 1360 2 0 2 2 1 1 1 0 8 1
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 473 0 12 29 0 29 29 0 8 0
art_table 40 475 0 12 5 0 5 5 0 8 0
art_node 32 115 0 13 1 0 1 1 0 8 0
sysvmsgpl 40 3 0 3 1 1 0 1 0 8 0
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 112 7 0 1 1 0 1 1 0 8 0
shmpl 112 8 0 1 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1887 0 429 92 0 92 92 0 8 0
ffsino 256 1887 0 429 92 0 92 92 0 8 0
nchpl 144 2326 0 632 63 0 63 63 0 8 0
vnodes 216 2048 0 0 114 0 114 114 0 8 0
namei 1024 7071 0 7067 2 1 1 2 0 8 0
kstatmem 264 46 0 24 2 0 2 2 0 8 0
scsiplug 72 1 0 1 1 0 1 1 0 8 1
scxspl 216 8825 0 8825 8 7 1 8 1 8 1
plimitpl 152 81 0 64 1 0 1 1 0 8 0
sigapl 424 606 0 564 7 1 6 6 0 8 0
knotepl 120 10494 0 10447 30 21 9 23 0 8 6
kqueuepl 184 87 0 78 1 0 1 1 0 8 0
pipepl 304 131 0 103 3 0 3 3 0 8 0
fdescpl 448 592 0 564 5 1 4 5 0 8 0
filepl 120 2709 0 2488 12 0 12 12 0 8 3
lockfpl 104 45 0 42 1 0 1 1 0 8 0
lockfspl 48 24 0 21 1 0 1 1 0 8 0
sessionpl 144 29 0 21 1 0 1 1 0 8 0
pgrppl 48 37 0 21 1 0 1 1 0 8 0
ucredpl 104 209 0 197 1 0 1 1 0 8 0
zombiepl 144 633 0 632 1 0 1 1 0 8 0
processpl 1152 606 0 564 4 0 4 4 0 8 0
procpl 664 895 0 840 6 0 6 6 0 8 0
sockpl 552 577 0 549 12 0 12 12 0 8 8
mcl64k 65536 19 0 16 2 1 1 1 0 8 0
mcl16k 16384 3 0 3 1 0 1 1 0 8 1
mcl8k 8192 13 0 13 2 1 1 1 0 8 1
mcl4k 4096 2755 0 2703 17 9 8 16 0 8 1
mcl2k2 2112 1 0 1 1 0 1 1 0 8 1
mcl2k 2048 328 0 326 2 1 1 1 0 8 0
mtagpl 96 4 0 4 1 1 0 1 0 8 0
mbufpl 256 6015 0 5830 14 1 13 13 0 8 0
bufpl 280 3162 0 104 219 0 219 219 0 8 0
anonpl 24 84150 0 78766 40 0 40 40 0 187 6
amapchunkpl 152 13476 0 13001 36 2 34 34 0 158 12
amappl16 200 822 0 655 10 1 9 9 0 8 0
amappl15 192 3 0 3 1 1 0 1 0 8 0
amappl14 184 422 0 421 1 0 1 1 0 8 0
amappl13 176 110 0 100 1 0 1 1 0 8 0
amappl12 168 826 0 799 2 0 2 2 0 8 0
amappl11 160 1 0 1 1 1 0 1 0 8 0
amappl10 152 54 0 44 1 0 1 1 0 8 0
amappl9 144 269 0 268 1 0 1 1 0 8 0
amappl8 136 97 0 96 1 0 1 1 0 8 0
amappl7 128 136 0 124 1 0 1 1 0 8 0
amappl6 120 146 0 145 1 0 1 1 0 8 0
amappl5 112 88 0 79 1 0 1 1 0 8 0
amappl4 104 251 0 237 1 0 1 1 0 8 0
amappl3 96 2568 0 2459 4 0 4 4 0 8 0
amappl2 88 519 0 464 2 0 2 2 0 8 0
amappl1 80 10190 0 9647 16 1 15 15 0 8 1
amappl 88 3839 0 3679 5 0 5 5 0 92 0
uvmvnodes 80 99 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 128 253 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 10 0 1 1 0 1 1 0 8 0
uaddrrnd 24 592 0 564 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 592 0 564 1 0 1 1 0 8 0
vmmpekpl 168 6421 0 6386 2 0 2 2 0 8 0
vmmpepl 168 44342 0 42466 94 0 94 94 0 357 6
vmsppl 368 591 0 564 4 1 3 4 0 8 0
rwobjpl 40 14453 0 13359 13 0 13 13 0 8 1
pdppl 4096 1190 0 1128 98 32 66 80 0 8 4
pvpl 32 248357 0 237118 113 4 109 109 0 265 14
pmappl 216 591 0 564 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 377 0 53 10 0 10 10 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(ffffffff833a9d60) at panic+0x1cf sys/kern/subr_prf.c:198
vgonel(fffffd806ab482c8,ffff80002a78a540) at vgonel+0x663
vrecycle(fffffd806ab482c8,ffff80002a78a540) at vrecycle+0x7c sys/kern/vfs_subr.c:1136
ufs_inactive(ffff80002a7eb060) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107
VOP_INACTIVE(fffffd806ab482c8,ffff80002a78a540) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498
vput(fffffd806ab482c8) at vput+0xdc sys/kern/vfs_subr.c:789
VOP_REMOVE(fffffd806872fe90,fffffd806ab482c8,ffff80002a7eb1c8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336
dounlinkat(ffff80002a78a540,ffffff9c,713643c803e0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923
syscall(ffff80002a7eb330) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7eb330) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x713643c80890, 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(ffffffff833a9d60) at panic+0x1cf sys/kern/subr_prf.c:198
vgonel(fffffd806ab482c8,ffff80002a78a540) at vgonel+0x663
vrecycle(fffffd806ab482c8,ffff80002a78a540) at vrecycle+0x7c sys/kern/vfs_subr.c:1136
ufs_inactive(ffff80002a7eb060) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107
VOP_INACTIVE(fffffd806ab482c8,ffff80002a78a540) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498
vput(fffffd806ab482c8) at vput+0xdc sys/kern/vfs_subr.c:789
VOP_REMOVE(fffffd806872fe90,fffffd806ab482c8,ffff80002a7eb1c8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336
dounlinkat(ffff80002a78a540,ffffff9c,713643c803e0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923
syscall(ffff80002a7eb330) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7eb330) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x713643c80890, count: -11