assert "dtlookup(unit) == NULL" failed in dt_dev.c (3)
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syzbot
Dec 31, 2023, 11:13:20 PM12/31/23
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 4dba83b83de2 Add TCP Segmentation Offload (TSO) support fo..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16acd519e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=6d66c21f796c817948f0
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/374e799385cf/disk-4dba83b8.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a752cdea5c25/bsd-4dba83b8.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/aa15eea0e3a4/kernel-4dba83b8.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6d66c2...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "dtlookup(unit) == NULL" failed: file "/syzkaller/managers/main/kernel/sys/dev/dt/dt_dev.c", line 168
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*327245 25730 0 0 0x4000000 0 syz-executor.5
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278714d) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82802b97,ffffffff82828b00,a8,ffffffff827a9a50) at __assert+0x29 sys/kern/subr_prf.c:157
dtopen(21e5f,1,2000,ffff800035e09540) at dtopen+0x1d4 sys/dev/dt/dt_dev.c:168
spec_open_clone(ffff800034a4da08) at spec_open_clone+0x208
spec_open(ffff800034a4da08) at spec_open+0x401 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80664cd7b0,1,fffffd807f7d7af8,ffff800035e09540) at VOP_OPEN+0x70 sys/kern/vfs_vops.c:138
vn_open(ffff800034a4dc58,1,0) at vn_open+0x452 sys/kern/vfs_vnops.c:177
doopenat(ffff800035e09540,ffffff9c,20000000,0,0,ffff800034a4de30) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800034a4dea0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3c093c77a20, 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: kernel diagnostic assertion "dtlookup(unit) == NULL" failed: file "/syzkaller/managers/main/kernel/sys/dev/dt/dt_dev.c", line 168
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278714d) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82802b97,ffffffff82828b00,a8,ffffffff827a9a50) at __assert+0x29 sys/kern/subr_prf.c:157
dtopen(21e5f,1,2000,ffff800035e09540) at dtopen+0x1d4 sys/dev/dt/dt_dev.c:168
spec_open_clone(ffff800034a4da08) at spec_open_clone+0x208
spec_open(ffff800034a4da08) at spec_open+0x401 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80664cd7b0,1,fffffd807f7d7af8,ffff800035e09540) at VOP_OPEN+0x70 sys/kern/vfs_vops.c:138
vn_open(ffff800034a4dc58,1,0) at vn_open+0x452 sys/kern/vfs_vnops.c:177
doopenat(ffff800035e09540,ffffff9c,20000000,0,0,ffff800034a4de30) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800034a4dea0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3c093c77a20, count: -11
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff800034a4d7e0
rbx 0
rdx 0xffff800000d04a80
rcx 0
rax 0xffff800035e09540
r8 0x101010101010101
r9 0x8080808080808080
r10 0x168e231a60151057
r11 0x69fc7cb2ba2538a3
r12 0
r13 0xffff800000d0fc00
r14 0
r15 0x1
rip 0xffffffff824ed06c db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff800034a4d7d0
ss 0x10
db_enter+0x1c: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.5) tid=327245 pid=25730 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=83, usrpri=83, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0xffffffffffffffff, list=0xffff800035e08ff0,0xffff800035e08010
process=0xffff8000378dcfc0 user=0xffff800034a48000, vmspace=0xfffffd8067d7a8b0
estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
57108 111721 21131 0 2 0 syz-executor.3
57108 298973 21131 0 3 0x4000080 fsleep syz-executor.3
3219 112226 6847 0 2 0 syz-executor.4
3219 474752 6847 0 3 0x4000080 fsleep syz-executor.4
15618 81538 95862 0 2 0 syz-executor.2
15618 376370 95862 0 3 0x4000080 fsleep syz-executor.2
25730 519526 5629 0 2 0 syz-executor.5
*25730 327245 5629 0 7 0x4000000 syz-executor.5
83604 293665 31858 0 2 0 syz-executor.0
83604 5088 31858 0 3 0x4000080 fsleep syz-executor.0
83604 187203 31858 0 3 0x4000080 fsleep syz-executor.0
99413 129862 61269 0 2 0 syz-executor.7
99413 467949 61269 0 3 0x4000080 fsleep syz-executor.7
99413 9930 61269 0 3 0x4000080 fsleep syz-executor.7
96467 446893 55746 0 2 0 syz-executor.6
96467 493923 55746 0 3 0x4000080 fsleep syz-executor.6
96467 498846 55746 0 3 0x4000080 fsleep syz-executor.6
96467 243699 55746 0 3 0x4000080 fsleep syz-executor.6
44834 505358 50456 0 2 0 syz-executor.1
44834 239191 50456 0 3 0x4000080 fifor syz-executor.1
44834 407474 50456 0 3 0x4000080 fsleep syz-executor.1
44834 45503 50456 0 3 0x4000080 fsleep syz-executor.1
44834 44911 50456 0 3 0x4000080 fsleep syz-executor.1
31858 307272 45027 0 3 0x82 nanoslp syz-executor.0
6847 25306 45027 0 3 0x82 nanoslp syz-executor.4
50456 260994 45027 0 3 0x82 nanoslp syz-executor.1
61269 490073 45027 0 3 0x82 nanoslp syz-executor.7
21131 465699 45027 0 3 0x82 nanoslp syz-executor.3
55746 466500 45027 0 3 0x82 nanoslp syz-executor.6
35460 119594 0 0 3 0x14200 bored sosplice
32654 442204 0 0 3 0x14280 nfsidl nfsio
22283 300489 0 0 3 0x14280 nfsidl nfsio
40890 439514 0 0 3 0x14280 nfsidl nfsio
13225 327712 0 0 3 0x14280 nfsidl nfsio
91518 217341 0 0 3 0x14280 nfsidl nfsio
19295 97586 0 0 3 0x14280 nfsidl nfsio
42529 283294 0 0 3 0x14280 nfsidl nfsio
82442 348830 0 0 3 0x14280 nfsidl nfsio
30915 272148 0 0 3 0x14280 nfsidl nfsio
19931 386741 0 0 3 0x14280 nfsidl nfsio
54014 366617 0 0 3 0x14280 nfsidl nfsio
45200 442260 0 0 3 0x14280 nfsidl nfsio
5239 476283 0 0 3 0x14280 nfsidl nfsio
10264 240852 0 0 3 0x14280 nfsidl nfsio
42955 73669 0 0 3 0x14280 nfsidl nfsio
25130 519266 0 0 3 0x14280 nfsidl nfsio
55938 348906 0 0 3 0x14280 nfsidl nfsio
86262 35450 0 0 3 0x14280 nfsidl nfsio
85793 508880 0 0 3 0x14280 nfsidl nfsio
66325 456059 0 0 3 0x14280 nfsidl nfsio
5629 248860 45027 0 3 0x82 nanoslp syz-executor.5
95862 164689 45027 0 3 0x82 nanoslp syz-executor.2
45027 244821 88235 0 3 0x2000082 wait syz-fuzzer
45027 90911 88235 0 3 0x6000082 thrsleep syz-fuzzer
45027 67491 88235 0 3 0x6000082 wait syz-fuzzer
45027 285874 88235 0 3 0x6000082 thrsleep syz-fuzzer
45027 372653 88235 0 3 0x6000082 wait syz-fuzzer
45027 507914 88235 0 3 0x6000082 thrsleep syz-fuzzer
45027 148060 88235 0 3 0x6000082 wait syz-fuzzer
45027 73974 88235 0 3 0x6000082 wait syz-fuzzer
45027 254230 88235 0 3 0x6000082 kqread syz-fuzzer
45027 80953 88235 0 3 0x6000082 wait syz-fuzzer
45027 18869 88235 0 3 0x6000082 thrsleep syz-fuzzer
45027 144681 88235 0 3 0x6000082 wait syz-fuzzer
45027 473456 88235 0 3 0x6000082 wait syz-fuzzer
45027 484871 88235 0 3 0x6000082 thrsleep syz-fuzzer
88235 296619 86045 0 3 0x10008a sigsusp ksh
86045 4492 5386 0 3 0x9a kqread sshd
55549 177334 1 0 3 0x100083 ttyin getty
5386 298192 1 0 3 0x88 kqread sshd
9835 168499 17818 73 3 0x1100090 kqread syslogd
17818 432828 1 0 3 0x100082 netio syslogd
73405 9367 1 0 3 0x100080 kqread resolvd
84733 48106 64474 77 3 0x100092 kqread dhcpleased
62667 72197 64474 77 3 0x100092 kqread dhcpleased
64474 280811 1 0 3 0x80 kqread dhcpleased
46277 297931 0 0 3 0x14200 bored smr
16925 66958 0 0 2 0x14200 zerothread
65908 282882 0 0 3 0x14200 aiodoned aiodoned
82205 208881 0 0 3 0x14200 syncer update
29269 152176 0 0 3 0x14200 cleaner cleaner
60569 82680 0 0 3 0x14200 reaper reaper
19021 118906 0 0 3 0x14200 pgdaemon pagedaemon
76581 126590 0 0 3 0x14200 bored viomb
56326 411763 0 0 3 0x40014200 acpi0 acpi0
28123 361313 0 0 3 0x14200 bored softnet3
95271 291578 0 0 3 0x14200 bored softnet2
74942 442823 0 0 3 0x14200 bored softnet1
64755 324229 0 0 3 0x14200 bored softnet0
9335 389107 0 0 3 0x14200 bored systqmp
25385 182776 0 0 3 0x14200 bored systq
306 214887 0 0 3 0x40014200 tmoslp softclock
32559 288061 0 0 3 0x40014200 idle0
1 302173 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 10214 6520K 6923K 166960K 15944 0
pcb 13 14K 16K 166960K 388 0
rtable 196 8K 9K 166960K 704 0
pf 29 8K 9K 166960K 125 0
ifaddr 41 11K 12K 166960K 119 0
ifgroup 50 2K 2K 166960K 174 0
sysctl 3 0K 0K 166960K 3 0
counters 30 17K 17K 166960K 75 0
ioctlops 0 0K 2K 166960K 205 0
iov 0 0K 32K 166960K 614 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1454 91K 91K 166960K 3224 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 31 0
VM map 2 1K 1K 166960K 2 0
sem 10 1K 1K 166960K 18 0
dirhash 12 2K 2K 166960K 21 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 18 65K 73K 166960K 3092 0
sigio 0 0K 0K 166960K 158 0
proc 57 59K 75K 166960K 797 0
subproc 104 6K 6K 166960K 197 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 50 0
in_multi 77 5K 7K 166960K 188 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 217 970K 970K 166960K 217 0
exec 0 0K 1K 166960K 913 0
pfkey data 0 0K 0K 166960K 2 0
tdb 3 0K 0K 166960K 3 0
pagedep 1 8K 8K 166960K 1 0
inodedep 1 32K 32K 166960K 1 0
newblk 1 0K 0K 166960K 1 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 392 189K 198K 166960K 30986 0
UVM aobj 131 4K 4K 166960K 131 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 171 0
NDP 11 0K 2K 166960K 86 0
temp 75 5920K 5996K 166960K 40848 0
kqueue 12 18K 26K 166960K 226 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 120 253 0 250 3 2 1 3 0 8 0
rtentry 112 194 0 106 4 0 4 4 0 8 0
unpcb 144 1565 0 1550 20 19 1 6 0 8 0
syncache 312 32 0 32 6 6 0 1 0 8 0
tcpqe 32 151 0 151 5 5 0 1 0 8 0
tcpcb 808 761 0 757 24 21 3 12 0 8 2
arp 88 34 0 20 1 0 1 1 0 8 0
ipq 40 2 0 2 2 2 0 1 0 8 0
ipqe 40 9 0 9 2 2 0 1 0 8 0
inpcb 336 1962 0 1955 41 37 4 16 0 8 3
nd6 104 46 0 28 1 0 1 1 0 8 0
pkpcb 40 136 0 136 2 2 0 1 0 8 0
kcovpl 48 15 0 7 1 0 1 1 0 8 0
ppxss 1160 31 0 31 5 5 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 773 0 403 33 9 24 29 0 8 0
art_table 32 774 0 403 4 0 4 4 0 8 0
art_node 16 190 0 110 1 0 1 1 0 8 0
sysvmsgpl 40 15 0 7 1 0 1 1 0 8 0
semupl 112 8 0 8 1 1 0 1 0 8 0
semapl 112 8 0 0 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 23 0 6 3 0 3 3 0 8 0
dino2pl 256 5668 0 4214 92 0 92 92 0 8 0
ffsino 240 5668 0 4214 86 0 86 86 0 8 0
nchpl 144 11030 0 9377 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 38699 0 38699 4 3 1 2 0 8 1
vcpupl 2048 73 0 0 10 0 10 10 0 8 0
vmpool 664 79 0 6 7 0 7 7 0 8 0
kstatmem 264 112 0 90 2 0 2 2 0 8 0
scxspl 216 29081 0 29081 13 12 1 8 1 8 1
plimitpl 152 453 0 437 1 0 1 1 0 8 0
sigapl 424 3400 0 3334 8 0 8 8 0 8 0
futexpl 64 29791 0 29778 1 0 1 1 0 8 0
knotepl 120 41826 0 41746 20 8 12 15 0 8 8
kqueuepl 184 581 0 573 10 9 1 4 0 8 0
pipepl 288 897 0 868 11 8 3 7 0 8 0
fdescpl 432 3362 0 3333 4 0 4 4 0 8 0
filepl 120 23424 0 23178 41 32 9 19 0 8 1
lockfpl 104 898 0 896 3 2 1 2 0 8 0
lockfspl 48 322 0 320 1 0 1 1 0 8 0
sessionpl 144 30 0 14 1 0 1 1 0 8 0
pgrppl 48 104 0 88 1 0 1 1 0 8 0
ucredpl 104 3416 0 3406 1 0 1 1 0 8 0
zombiepl 144 3669 0 3669 2 1 1 1 0 8 1
processpl 1008 3400 0 3334 10 1 9 9 0 8 0
procpl 680 8075 0 7981 11 2 9 9 0 8 0
sosppl 168 29 0 29 4 3 1 1 0 8 1
sockpl 456 3916 0 3891 90 81 9 26 0 8 5
mcl64k 65536 164 0 164 3 2 1 1 0 8 1
mcl16k 16384 65 0 65 9 8 1 1 0 8 1
mcl12k 12288 125 0 125 8 7 1 1 0 8 1
mcl9k 9216 42 0 42 7 7 0 1 0 8 0
mcl8k 8192 168 0 168 4 3 1 1 0 8 1
mcl4k 4096 310 0 310 4 3 1 1 0 8 1
mcl2k2 2112 20 0 20 9 8 1 1 0 8 1
mcl2k 2048 73195 0 73155 39 32 7 31 0 8 1
mtagpl 96 422 0 348 6 1 5 5 0 8 0
mbufpl 256 146037 0 145871 211 184 27 108 0 8 6
bufpl 288 9321 0 2927 457 0 457 457 0 8 0
anonpl 24 456640 0 443605 97 7 90 94 0 188 0
amapchunkpl 152 99252 0 98291 49 12 37 41 0 158 0
amappl16 200 9909 0 9499 29 6 23 25 0 8 1
amappl15 192 17 0 17 1 1 0 1 0 8 0
amappl14 184 174 0 163 2 1 1 2 0 8 0
amappl13 176 19 0 19 2 2 0 1 0 8 0
amappl12 168 4095 0 4063 2 0 2 2 0 8 0
amappl11 160 57 0 46 1 0 1 1 0 8 0
amappl10 152 34 0 22 1 0 1 1 0 8 0
amappl9 144 137 0 136 2 1 1 1 0 8 0
amappl8 136 251 0 181 3 0 3 3 0 8 0
amappl7 128 200 0 178 2 0 2 2 0 8 0
amappl6 120 372 0 363 1 0 1 1 0 8 0
amappl5 112 209 0 201 1 0 1 1 0 8 0
amappl4 104 493 0 467 2 1 1 2 0 8 0
amappl3 96 19786 0 19679 3 0 3 3 0 8 0
amappl2 88 3915 0 3839 3 0 3 3 0 8 0
amappl1 80 20578 0 20074 22 9 13 22 0 8 0
amappl 88 30350 0 30088 6 0 6 6 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 72 130 0 0 3 0 3 3 0 8 0
uaddrrnd 24 3441 0 3339 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 3441 0 3339 1 0 1 1 0 8 0
vmmpekpl 168 28808 0 28733 4 0 4 4 0 8 0
vmmpepl 168 217005 0 214539 183 63 120 125 0 357 12
vmsppl 368 3440 0 3339 10 0 10 10 0 8 0
rwobjpl 24 63110 0 55581 46 0 46 46 0 8 0
pdppl 4096 6888 0 6751 335 198 137 137 0 8 0
pvpl 32 1119364 0 1100600 352 189 163 333 0 265 1
pmappl 216 3440 0 3339 6 0 6 6 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1397 0 518 28 0 28 28 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278714d) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82802b97,ffffffff82828b00,a8,ffffffff827a9a50) at __assert+0x29 sys/kern/subr_prf.c:157
dtopen(21e5f,1,2000,ffff800035e09540) at dtopen+0x1d4 sys/dev/dt/dt_dev.c:168
spec_open_clone(ffff800034a4da08) at spec_open_clone+0x208
spec_open(ffff800034a4da08) at spec_open+0x401 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80664cd7b0,1,fffffd807f7d7af8,ffff800035e09540) at VOP_OPEN+0x70 sys/kern/vfs_vops.c:138
vn_open(ffff800034a4dc58,1,0) at vn_open+0x452 sys/kern/vfs_vnops.c:177
doopenat(ffff800035e09540,ffffff9c,20000000,0,0,ffff800034a4de30) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800034a4dea0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3c093c77a20, count: -11
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278714d) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82802b97,ffffffff82828b00,a8,ffffffff827a9a50) at __assert+0x29 sys/kern/subr_prf.c:157
dtopen(21e5f,1,2000,ffff800035e09540) at dtopen+0x1d4 sys/dev/dt/dt_dev.c:168
spec_open_clone(ffff800034a4da08) at spec_open_clone+0x208
spec_open(ffff800034a4da08) at spec_open+0x401 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80664cd7b0,1,fffffd807f7d7af8,ffff800035e09540) at VOP_OPEN+0x70 sys/kern/vfs_vops.c:138
vn_open(ffff800034a4dc58,1,0) at vn_open+0x452 sys/kern/vfs_vnops.c:177
doopenat(ffff800035e09540,ffffff9c,20000000,0,0,ffff800034a4de30) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800034a4dea0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3c093c77a20, count: -11
---
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syzbot found the following issue on:
HEAD commit: 4dba83b83de2 Add TCP Segmentation Offload (TSO) support fo..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16acd519e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=6d66c21f796c817948f0
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/374e799385cf/disk-4dba83b8.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a752cdea5c25/bsd-4dba83b8.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/aa15eea0e3a4/kernel-4dba83b8.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6d66c2...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "dtlookup(unit) == NULL" failed: file "/syzkaller/managers/main/kernel/sys/dev/dt/dt_dev.c", line 168
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*327245 25730 0 0 0x4000000 0 syz-executor.5
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278714d) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82802b97,ffffffff82828b00,a8,ffffffff827a9a50) at __assert+0x29 sys/kern/subr_prf.c:157
dtopen(21e5f,1,2000,ffff800035e09540) at dtopen+0x1d4 sys/dev/dt/dt_dev.c:168
spec_open_clone(ffff800034a4da08) at spec_open_clone+0x208
spec_open(ffff800034a4da08) at spec_open+0x401 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80664cd7b0,1,fffffd807f7d7af8,ffff800035e09540) at VOP_OPEN+0x70 sys/kern/vfs_vops.c:138
vn_open(ffff800034a4dc58,1,0) at vn_open+0x452 sys/kern/vfs_vnops.c:177
doopenat(ffff800035e09540,ffffff9c,20000000,0,0,ffff800034a4de30) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800034a4dea0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3c093c77a20, 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: kernel diagnostic assertion "dtlookup(unit) == NULL" failed: file "/syzkaller/managers/main/kernel/sys/dev/dt/dt_dev.c", line 168
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278714d) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82802b97,ffffffff82828b00,a8,ffffffff827a9a50) at __assert+0x29 sys/kern/subr_prf.c:157
dtopen(21e5f,1,2000,ffff800035e09540) at dtopen+0x1d4 sys/dev/dt/dt_dev.c:168
spec_open_clone(ffff800034a4da08) at spec_open_clone+0x208
spec_open(ffff800034a4da08) at spec_open+0x401 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80664cd7b0,1,fffffd807f7d7af8,ffff800035e09540) at VOP_OPEN+0x70 sys/kern/vfs_vops.c:138
vn_open(ffff800034a4dc58,1,0) at vn_open+0x452 sys/kern/vfs_vnops.c:177
doopenat(ffff800035e09540,ffffff9c,20000000,0,0,ffff800034a4de30) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800034a4dea0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3c093c77a20, count: -11
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff800034a4d7e0
rbx 0
rdx 0xffff800000d04a80
rcx 0
rax 0xffff800035e09540
r8 0x101010101010101
r9 0x8080808080808080
r10 0x168e231a60151057
r11 0x69fc7cb2ba2538a3
r12 0
r13 0xffff800000d0fc00
r14 0
r15 0x1
rip 0xffffffff824ed06c db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff800034a4d7d0
ss 0x10
db_enter+0x1c: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.5) tid=327245 pid=25730 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=83, usrpri=83, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0xffffffffffffffff, list=0xffff800035e08ff0,0xffff800035e08010
process=0xffff8000378dcfc0 user=0xffff800034a48000, vmspace=0xfffffd8067d7a8b0
estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
57108 111721 21131 0 2 0 syz-executor.3
57108 298973 21131 0 3 0x4000080 fsleep syz-executor.3
3219 112226 6847 0 2 0 syz-executor.4
3219 474752 6847 0 3 0x4000080 fsleep syz-executor.4
15618 81538 95862 0 2 0 syz-executor.2
15618 376370 95862 0 3 0x4000080 fsleep syz-executor.2
25730 519526 5629 0 2 0 syz-executor.5
*25730 327245 5629 0 7 0x4000000 syz-executor.5
83604 293665 31858 0 2 0 syz-executor.0
83604 5088 31858 0 3 0x4000080 fsleep syz-executor.0
83604 187203 31858 0 3 0x4000080 fsleep syz-executor.0
99413 129862 61269 0 2 0 syz-executor.7
99413 467949 61269 0 3 0x4000080 fsleep syz-executor.7
99413 9930 61269 0 3 0x4000080 fsleep syz-executor.7
96467 446893 55746 0 2 0 syz-executor.6
96467 493923 55746 0 3 0x4000080 fsleep syz-executor.6
96467 498846 55746 0 3 0x4000080 fsleep syz-executor.6
96467 243699 55746 0 3 0x4000080 fsleep syz-executor.6
44834 505358 50456 0 2 0 syz-executor.1
44834 239191 50456 0 3 0x4000080 fifor syz-executor.1
44834 407474 50456 0 3 0x4000080 fsleep syz-executor.1
44834 45503 50456 0 3 0x4000080 fsleep syz-executor.1
44834 44911 50456 0 3 0x4000080 fsleep syz-executor.1
31858 307272 45027 0 3 0x82 nanoslp syz-executor.0
6847 25306 45027 0 3 0x82 nanoslp syz-executor.4
50456 260994 45027 0 3 0x82 nanoslp syz-executor.1
61269 490073 45027 0 3 0x82 nanoslp syz-executor.7
21131 465699 45027 0 3 0x82 nanoslp syz-executor.3
55746 466500 45027 0 3 0x82 nanoslp syz-executor.6
35460 119594 0 0 3 0x14200 bored sosplice
32654 442204 0 0 3 0x14280 nfsidl nfsio
22283 300489 0 0 3 0x14280 nfsidl nfsio
40890 439514 0 0 3 0x14280 nfsidl nfsio
13225 327712 0 0 3 0x14280 nfsidl nfsio
91518 217341 0 0 3 0x14280 nfsidl nfsio
19295 97586 0 0 3 0x14280 nfsidl nfsio
42529 283294 0 0 3 0x14280 nfsidl nfsio
82442 348830 0 0 3 0x14280 nfsidl nfsio
30915 272148 0 0 3 0x14280 nfsidl nfsio
19931 386741 0 0 3 0x14280 nfsidl nfsio
54014 366617 0 0 3 0x14280 nfsidl nfsio
45200 442260 0 0 3 0x14280 nfsidl nfsio
5239 476283 0 0 3 0x14280 nfsidl nfsio
10264 240852 0 0 3 0x14280 nfsidl nfsio
42955 73669 0 0 3 0x14280 nfsidl nfsio
25130 519266 0 0 3 0x14280 nfsidl nfsio
55938 348906 0 0 3 0x14280 nfsidl nfsio
86262 35450 0 0 3 0x14280 nfsidl nfsio
85793 508880 0 0 3 0x14280 nfsidl nfsio
66325 456059 0 0 3 0x14280 nfsidl nfsio
5629 248860 45027 0 3 0x82 nanoslp syz-executor.5
95862 164689 45027 0 3 0x82 nanoslp syz-executor.2
45027 244821 88235 0 3 0x2000082 wait syz-fuzzer
45027 90911 88235 0 3 0x6000082 thrsleep syz-fuzzer
45027 67491 88235 0 3 0x6000082 wait syz-fuzzer
45027 285874 88235 0 3 0x6000082 thrsleep syz-fuzzer
45027 372653 88235 0 3 0x6000082 wait syz-fuzzer
45027 507914 88235 0 3 0x6000082 thrsleep syz-fuzzer
45027 148060 88235 0 3 0x6000082 wait syz-fuzzer
45027 73974 88235 0 3 0x6000082 wait syz-fuzzer
45027 254230 88235 0 3 0x6000082 kqread syz-fuzzer
45027 80953 88235 0 3 0x6000082 wait syz-fuzzer
45027 18869 88235 0 3 0x6000082 thrsleep syz-fuzzer
45027 144681 88235 0 3 0x6000082 wait syz-fuzzer
45027 473456 88235 0 3 0x6000082 wait syz-fuzzer
45027 484871 88235 0 3 0x6000082 thrsleep syz-fuzzer
88235 296619 86045 0 3 0x10008a sigsusp ksh
86045 4492 5386 0 3 0x9a kqread sshd
55549 177334 1 0 3 0x100083 ttyin getty
5386 298192 1 0 3 0x88 kqread sshd
9835 168499 17818 73 3 0x1100090 kqread syslogd
17818 432828 1 0 3 0x100082 netio syslogd
73405 9367 1 0 3 0x100080 kqread resolvd
84733 48106 64474 77 3 0x100092 kqread dhcpleased
62667 72197 64474 77 3 0x100092 kqread dhcpleased
64474 280811 1 0 3 0x80 kqread dhcpleased
46277 297931 0 0 3 0x14200 bored smr
16925 66958 0 0 2 0x14200 zerothread
65908 282882 0 0 3 0x14200 aiodoned aiodoned
82205 208881 0 0 3 0x14200 syncer update
29269 152176 0 0 3 0x14200 cleaner cleaner
60569 82680 0 0 3 0x14200 reaper reaper
19021 118906 0 0 3 0x14200 pgdaemon pagedaemon
76581 126590 0 0 3 0x14200 bored viomb
56326 411763 0 0 3 0x40014200 acpi0 acpi0
28123 361313 0 0 3 0x14200 bored softnet3
95271 291578 0 0 3 0x14200 bored softnet2
74942 442823 0 0 3 0x14200 bored softnet1
64755 324229 0 0 3 0x14200 bored softnet0
9335 389107 0 0 3 0x14200 bored systqmp
25385 182776 0 0 3 0x14200 bored systq
306 214887 0 0 3 0x40014200 tmoslp softclock
32559 288061 0 0 3 0x40014200 idle0
1 302173 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 10214 6520K 6923K 166960K 15944 0
pcb 13 14K 16K 166960K 388 0
rtable 196 8K 9K 166960K 704 0
pf 29 8K 9K 166960K 125 0
ifaddr 41 11K 12K 166960K 119 0
ifgroup 50 2K 2K 166960K 174 0
sysctl 3 0K 0K 166960K 3 0
counters 30 17K 17K 166960K 75 0
ioctlops 0 0K 2K 166960K 205 0
iov 0 0K 32K 166960K 614 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1454 91K 91K 166960K 3224 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 31 0
VM map 2 1K 1K 166960K 2 0
sem 10 1K 1K 166960K 18 0
dirhash 12 2K 2K 166960K 21 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 18 65K 73K 166960K 3092 0
sigio 0 0K 0K 166960K 158 0
proc 57 59K 75K 166960K 797 0
subproc 104 6K 6K 166960K 197 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 50 0
in_multi 77 5K 7K 166960K 188 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 217 970K 970K 166960K 217 0
exec 0 0K 1K 166960K 913 0
pfkey data 0 0K 0K 166960K 2 0
tdb 3 0K 0K 166960K 3 0
pagedep 1 8K 8K 166960K 1 0
inodedep 1 32K 32K 166960K 1 0
newblk 1 0K 0K 166960K 1 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 392 189K 198K 166960K 30986 0
UVM aobj 131 4K 4K 166960K 131 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 171 0
NDP 11 0K 2K 166960K 86 0
temp 75 5920K 5996K 166960K 40848 0
kqueue 12 18K 26K 166960K 226 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 120 253 0 250 3 2 1 3 0 8 0
rtentry 112 194 0 106 4 0 4 4 0 8 0
unpcb 144 1565 0 1550 20 19 1 6 0 8 0
syncache 312 32 0 32 6 6 0 1 0 8 0
tcpqe 32 151 0 151 5 5 0 1 0 8 0
tcpcb 808 761 0 757 24 21 3 12 0 8 2
arp 88 34 0 20 1 0 1 1 0 8 0
ipq 40 2 0 2 2 2 0 1 0 8 0
ipqe 40 9 0 9 2 2 0 1 0 8 0
inpcb 336 1962 0 1955 41 37 4 16 0 8 3
nd6 104 46 0 28 1 0 1 1 0 8 0
pkpcb 40 136 0 136 2 2 0 1 0 8 0
kcovpl 48 15 0 7 1 0 1 1 0 8 0
ppxss 1160 31 0 31 5 5 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 773 0 403 33 9 24 29 0 8 0
art_table 32 774 0 403 4 0 4 4 0 8 0
art_node 16 190 0 110 1 0 1 1 0 8 0
sysvmsgpl 40 15 0 7 1 0 1 1 0 8 0
semupl 112 8 0 8 1 1 0 1 0 8 0
semapl 112 8 0 0 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 23 0 6 3 0 3 3 0 8 0
dino2pl 256 5668 0 4214 92 0 92 92 0 8 0
ffsino 240 5668 0 4214 86 0 86 86 0 8 0
nchpl 144 11030 0 9377 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 38699 0 38699 4 3 1 2 0 8 1
vcpupl 2048 73 0 0 10 0 10 10 0 8 0
vmpool 664 79 0 6 7 0 7 7 0 8 0
kstatmem 264 112 0 90 2 0 2 2 0 8 0
scxspl 216 29081 0 29081 13 12 1 8 1 8 1
plimitpl 152 453 0 437 1 0 1 1 0 8 0
sigapl 424 3400 0 3334 8 0 8 8 0 8 0
futexpl 64 29791 0 29778 1 0 1 1 0 8 0
knotepl 120 41826 0 41746 20 8 12 15 0 8 8
kqueuepl 184 581 0 573 10 9 1 4 0 8 0
pipepl 288 897 0 868 11 8 3 7 0 8 0
fdescpl 432 3362 0 3333 4 0 4 4 0 8 0
filepl 120 23424 0 23178 41 32 9 19 0 8 1
lockfpl 104 898 0 896 3 2 1 2 0 8 0
lockfspl 48 322 0 320 1 0 1 1 0 8 0
sessionpl 144 30 0 14 1 0 1 1 0 8 0
pgrppl 48 104 0 88 1 0 1 1 0 8 0
ucredpl 104 3416 0 3406 1 0 1 1 0 8 0
zombiepl 144 3669 0 3669 2 1 1 1 0 8 1
processpl 1008 3400 0 3334 10 1 9 9 0 8 0
procpl 680 8075 0 7981 11 2 9 9 0 8 0
sosppl 168 29 0 29 4 3 1 1 0 8 1
sockpl 456 3916 0 3891 90 81 9 26 0 8 5
mcl64k 65536 164 0 164 3 2 1 1 0 8 1
mcl16k 16384 65 0 65 9 8 1 1 0 8 1
mcl12k 12288 125 0 125 8 7 1 1 0 8 1
mcl9k 9216 42 0 42 7 7 0 1 0 8 0
mcl8k 8192 168 0 168 4 3 1 1 0 8 1
mcl4k 4096 310 0 310 4 3 1 1 0 8 1
mcl2k2 2112 20 0 20 9 8 1 1 0 8 1
mcl2k 2048 73195 0 73155 39 32 7 31 0 8 1
mtagpl 96 422 0 348 6 1 5 5 0 8 0
mbufpl 256 146037 0 145871 211 184 27 108 0 8 6
bufpl 288 9321 0 2927 457 0 457 457 0 8 0
anonpl 24 456640 0 443605 97 7 90 94 0 188 0
amapchunkpl 152 99252 0 98291 49 12 37 41 0 158 0
amappl16 200 9909 0 9499 29 6 23 25 0 8 1
amappl15 192 17 0 17 1 1 0 1 0 8 0
amappl14 184 174 0 163 2 1 1 2 0 8 0
amappl13 176 19 0 19 2 2 0 1 0 8 0
amappl12 168 4095 0 4063 2 0 2 2 0 8 0
amappl11 160 57 0 46 1 0 1 1 0 8 0
amappl10 152 34 0 22 1 0 1 1 0 8 0
amappl9 144 137 0 136 2 1 1 1 0 8 0
amappl8 136 251 0 181 3 0 3 3 0 8 0
amappl7 128 200 0 178 2 0 2 2 0 8 0
amappl6 120 372 0 363 1 0 1 1 0 8 0
amappl5 112 209 0 201 1 0 1 1 0 8 0
amappl4 104 493 0 467 2 1 1 2 0 8 0
amappl3 96 19786 0 19679 3 0 3 3 0 8 0
amappl2 88 3915 0 3839 3 0 3 3 0 8 0
amappl1 80 20578 0 20074 22 9 13 22 0 8 0
amappl 88 30350 0 30088 6 0 6 6 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 72 130 0 0 3 0 3 3 0 8 0
uaddrrnd 24 3441 0 3339 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 3441 0 3339 1 0 1 1 0 8 0
vmmpekpl 168 28808 0 28733 4 0 4 4 0 8 0
vmmpepl 168 217005 0 214539 183 63 120 125 0 357 12
vmsppl 368 3440 0 3339 10 0 10 10 0 8 0
rwobjpl 24 63110 0 55581 46 0 46 46 0 8 0
pdppl 4096 6888 0 6751 335 198 137 137 0 8 0
pvpl 32 1119364 0 1100600 352 189 163 333 0 265 1
pmappl 216 3440 0 3339 6 0 6 6 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1397 0 518 28 0 28 28 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278714d) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82802b97,ffffffff82828b00,a8,ffffffff827a9a50) at __assert+0x29 sys/kern/subr_prf.c:157
dtopen(21e5f,1,2000,ffff800035e09540) at dtopen+0x1d4 sys/dev/dt/dt_dev.c:168
spec_open_clone(ffff800034a4da08) at spec_open_clone+0x208
spec_open(ffff800034a4da08) at spec_open+0x401 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80664cd7b0,1,fffffd807f7d7af8,ffff800035e09540) at VOP_OPEN+0x70 sys/kern/vfs_vops.c:138
vn_open(ffff800034a4dc58,1,0) at vn_open+0x452 sys/kern/vfs_vnops.c:177
doopenat(ffff800035e09540,ffffff9c,20000000,0,0,ffff800034a4de30) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800034a4dea0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3c093c77a20, count: -11
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278714d) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82802b97,ffffffff82828b00,a8,ffffffff827a9a50) at __assert+0x29 sys/kern/subr_prf.c:157
dtopen(21e5f,1,2000,ffff800035e09540) at dtopen+0x1d4 sys/dev/dt/dt_dev.c:168
spec_open_clone(ffff800034a4da08) at spec_open_clone+0x208
spec_open(ffff800034a4da08) at spec_open+0x401 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80664cd7b0,1,fffffd807f7d7af8,ffff800035e09540) at VOP_OPEN+0x70 sys/kern/vfs_vops.c:138
vn_open(ffff800034a4dc58,1,0) at vn_open+0x452 sys/kern/vfs_vnops.c:177
doopenat(ffff800035e09540,ffffff9c,20000000,0,0,ffff800034a4de30) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800034a4dea0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3c093c77a20, count: -11
---
This report is generated by a bot. It may contain errors.
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