uvm_fault: device_lookup
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syzbot
Jul 24, 2026, 11:44:30 PM (3 days ago) Jul 24
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: f3d8a5574675 vmd(8): guard firmware config system state wi..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1538d88e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=2cbc1aa46b0f2ece7b02
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c9e0d599db50/disk-f3d8a557.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a8e2aa836c69/bsd-f3d8a557.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9fac5026645a/kernel-f3d8a557.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2cbc1a...@syzkaller.appspotmail.com
uvm_fault(0xffffef807f230000, 0x798e267b, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at device_lookup+0x7b: movl 0x40(%rax),%r15d
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 3958 49582 0 0x2 0 0 syz-executor
device_lookup(ffffffff83920d10,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954
disk_lookup(ffffffff83920d10,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1
sdstrategy(ffffef806dcbecc8) at sdstrategy+0x53 sys/scsi/sd.c:530
spec_strategy(ffff80002a7d0ce8) at spec_strategy+0x42 sys/kern/spec_vnops.c:448
VOP_STRATEGY(ffffef8009871948,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
ufs_strategy(ffff80002a7d0d88) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
VOP_STRATEGY(ffffef806e2f0b28,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
bwrite(ffffef806dcbecc8) at bwrite+0x2f5 sys/kern/vfs_bio.c:616
ufs_dirremove(ffffef806e2f0b28,ffffef806f084400,800c,1) at ufs_dirremove+0x28d sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a7d0ef0) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(ffffef806e2f0b28,ffffef8062176a80,ffff80002a7d0fc8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a7662a8,ffffff9c,7f5cf1392c90,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840
syscall(ffff80002a7d1130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f5cf1392c80, count: 1
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: uvm_fault(0xffffef807f230000, 0x798e267b, 0, 1) -> e
ddb> show kasan
No such command
ddb> trace
device_lookup(ffffffff83920d10,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954
disk_lookup(ffffffff83920d10,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1
sdstrategy(ffffef806dcbecc8) at sdstrategy+0x53 sys/scsi/sd.c:530
spec_strategy(ffff80002a7d0ce8) at spec_strategy+0x42 sys/kern/spec_vnops.c:448
VOP_STRATEGY(ffffef8009871948,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
ufs_strategy(ffff80002a7d0d88) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
VOP_STRATEGY(ffffef806e2f0b28,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
bwrite(ffffef806dcbecc8) at bwrite+0x2f5 sys/kern/vfs_bio.c:616
ufs_dirremove(ffffef806e2f0b28,ffffef806f084400,800c,1) at ufs_dirremove+0x28d sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a7d0ef0) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(ffffef806e2f0b28,ffffef8062176a80,ffff80002a7d0fc8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a7662a8,ffffff9c,7f5cf1392c90,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840
syscall(ffff80002a7d1130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f5cf1392c80, count: -14
ddb> show registers
rdi 0x2
rsi 0
rbp 0xffff80002a7d0c20
rbx 0xffffef807b9b0600
rdx 0
rcx 0
rax 0x798e263b
r8 0xffffffffffffffff
r9 0x1
r10 0xf4c26ae726c5d522
r11 0x4930f16e10149abf
r12 0x2
r13 0
r14 0x798e263b
r15 0xffffffff83920d10 sd_cd
rip 0xffffffff8263f36b device_lookup+0x7b
cs 0x8
rflags 0x10202 __ALIGN_SIZE+0xf202
rsp 0xffff80002a7d0bf0
ss 0x10
device_lookup+0x7b: movl 0x40(%rax),%r15d
ddb> show proc
PROC (syz-executor) tid=3958 pid=49582 tcnt=1 stat=onproc
flags process=2<EXEC> proc=0
runpri=50, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a766010,0xffff80002a767a10
process=0xffff80002a79c010 user=0xffff80002a7cc000, vmspace=0xffffef807f230000
estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0
ddb> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
11386 228466 47738 0 2 0 0 syz-executor
11386 454276 47738 0 3 0 0x4000080 fsleep syz-executor
38721 96864 11732 0 2 0 0 syz-executor
38721 108111 11732 0 3 0 0x4000080 fsleep syz-executor
72474 213142 86292 0 2 0 0 syz-executor
72474 130541 86292 0 3 0 0x4000080 fsleep syz-executor
44421 147616 94376 0 2 0 0 syz-executor
44421 509918 94376 0 3 0 0x4000080 fsleep syz-executor
79737 252436 9420 0 2 0 0 syz-executor
79737 447361 9420 0 3 0 0x4000080 fsleep syz-executor
79737 8552 9420 0 3 0 0x4000080 fsleep syz-executor
79737 251378 9420 0 3 0 0x4000080 fsleep syz-executor
89237 411361 58192 0 2 0 0 syz-executor
89237 41694 58192 0 3 0 0x4000080 fsleep syz-executor
89237 401663 58192 0 2 0 0x4000000 syz-executor
52664 498709 71757 0 2 0x2 0 syz-executor
86292 488104 71757 0 2 0x2 0xc80 syz-executor
9420 20657 71757 0 2 0x2 0xc80 syz-executor
47738 80080 71757 0 3 0x2 0x80 nanoslp syz-executor
94376 346783 71757 0 2 0x2 0xc80 syz-executor
11732 295231 71757 0 2 0x2 0xc80 syz-executor
58192 309647 71757 0 2 0x2 0xc80 syz-executor
*49582 3958 71757 0 7 0x2 0 syz-executor
71757 242951 18445 0 2 0x2 0 syz-executor
18445 92835 10832 0 3 0x100002 0x88 sigsusp ksh
10832 318100 30299 0 3 0x10 0x88 kqread sshd-session
30299 440627 65718 0 3 0x12 0x80 kqread sshd-session
4891 126530 1 0 3 0x100003 0x80 ttyin getty
65718 170754 1 0 3 0 0x88 kqread sshd
41534 396871 61805 73 3 0x1100010 0x80 kqread syslogd
61805 298445 1 0 3 0x100002 0x80 sbwait syslogd
66458 168600 1 0 3 0x100000 0x80 kqread resolvd
88383 288228 86912 77 3 0x100012 0x80 kqread dhcpleased
74006 361894 86912 77 3 0x100012 0x80 kqread dhcpleased
86912 347443 1 0 3 0 0x80 kqread dhcpleased
87495 243005 0 0 3 0x14000 0x200 bored smr
42592 426686 0 0 2 0x14000 0x200 zerothread
12867 54869 0 0 3 0x14000 0x200 aiodoned aiodoned
67338 266951 0 0 3 0x14000 0x200 syncer update
2743 339382 0 0 3 0x14000 0x200 cleaner cleaner
96317 26285 0 0 3 0x14000 0x200 reaper reaper
78987 84631 0 0 3 0x14000 0x200 pgdaemon pagedaemon
9853 449597 0 0 3 0x14000 0x200 bored viomb
86465 185614 0 0 3 0x14000 0x40000200 acpi0 acpi0
64024 241106 0 0 3 0x14000 0x200 bored softnet0
91803 42679 0 0 3 0x14000 0x200 bored systqmp
42487 13393 0 0 3 0x14000 0x200 bored systq
60644 247666 0 0 3 0x14000 0x40000200 tmoslp softclock
37796 493355 0 0 3 0x14000 0x40000200 idle0
1 237749 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 11042 12183K 12251K 166960K 12374 0
pcb 17 12K 12K 166960K 47 0
rtable 216 6K 9K 166960K 560 0
pf 29 12K 17K 166960K 60 0
ifaddr 38 6K 7K 166960K 71 0
ifgroup 46 2K 2K 166960K 76 0
sysctl 2 1K 9K 166960K 7 0
counters 32 17K 17K 166960K 40 0
ioctlops 0 0K 4K 166960K 68 0
iov 0 0K 16K 166960K 13 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1297 82K 82K 166960K 1535 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 10 0
VM map 2 1K 1K 166960K 2 0
sem 11 0K 0K 166960K 80 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 16 57K 236K 166960K 432 0
sigio 0 0K 0K 166960K 2 0
proc 60 59K 83K 166960K 690 0
subproc 64 4K 4K 166960K 127 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 16 0
in_multi 88 6K 7K 166960K 165 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 16 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 73 334K 334K 166960K 73 0
exec 0 0K 1K 166960K 472 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 212 158K 173K 166960K 4971 0
UVM aobj 9 2K 2K 166960K 10 0
pinsyscall 37 74K 96K 166960K 1685 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 10 0
NDP 10 0K 2K 166960K 46 0
temp 33 9110K 9118K 166960K 14558 0
kqueue 14 22K 26K 166960K 60 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 59 0 56 1 0 1 1 0 8 0
rtentry 136 179 0 80 4 0 4 4 0 8 0
unpcb 144 136 0 119 1 0 1 1 0 8 0
syncache 336 7 0 7 2 1 1 1 0 8 1
tcpcb 736 57 0 52 1 0 1 1 0 8 0
arp 96 30 0 14 1 0 1 1 0 8 0
ipq 40 2 0 0 1 0 1 1 0 8 0
ipqe 40 2 0 0 1 0 1 1 0 8 0
inpcb 328 286 0 276 7 0 7 7 0 8 5
ip6q 72 1 0 0 1 0 1 1 0 8 0
ip6af 40 1 0 0 1 0 1 1 0 8 0
nd6 112 43 0 22 1 0 1 1 0 8 0
kcovpl 48 14 0 7 1 0 1 1 0 8 0
ppxss 1072 1 0 1 1 0 1 1 0 8 1
pfrktable 1344 7 0 7 1 0 1 1 0 8 1
pfstlim 224 1 0 0 1 0 1 1 0 8 0
pfanchor 1288 2 0 2 1 0 1 1 0 8 1
pftag 88 1 0 1 1 0 1 1 0 8 1
pfrule 1360 2 0 2 1 0 1 1 0 8 1
rttmr 136 1 0 1 1 0 1 1 0 8 1
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 722 0 310 29 0 29 29 0 8 1
art_table 40 723 0 310 5 0 5 5 0 8 0
art_node 32 179 0 89 1 0 1 1 0 8 0
sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0
semapl 72 78 0 69 1 0 1 1 0 8 0
shmpl 112 7 0 1 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 1901 0 431 92 0 92 92 0 8 0
ffsino 256 1901 0 431 92 0 92 92 0 8 0
nchpl 144 2382 0 670 64 0 64 64 0 8 0
vnodes 216 2108 0 0 118 0 118 118 0 8 0
namei 1024 7839 0 7839 3 2 1 2 0 8 1
pfiaddrpl 120 2 0 2 1 0 1 1 0 8 1
kstatmem 264 37 0 16 2 0 2 2 0 8 0
scxspl 216 7824 0 7824 4 2 2 3 1 8 2
plimitpl 152 57 0 41 1 0 1 1 0 8 0
sigapl 424 703 0 662 6 1 5 6 0 8 0
knotepl 120 9709 0 9413 11 0 11 11 0 8 2
kqueuepl 184 67 0 57 1 0 1 1 0 8 0
pipepl 304 163 0 136 3 0 3 3 0 8 0
fdescpl 448 690 0 662 5 1 4 5 0 8 0
filepl 120 2799 0 2561 9 0 9 9 0 8 1
lockfpl 104 71 0 68 1 0 1 1 0 8 0
lockfspl 48 34 0 31 1 0 1 1 0 8 0
sessionpl 144 35 0 27 1 0 1 1 0 8 0
pgrppl 48 63 0 47 1 0 1 1 0 8 0
ucredpl 104 312 0 301 1 0 1 1 0 8 0
zombiepl 144 662 0 662 2 1 1 1 0 8 1
processpl 1152 703 0 662 4 0 4 4 0 8 0
procpl 664 975 0 925 5 0 5 5 0 8 0
sockpl 552 491 0 461 8 0 8 8 0 8 5
mcl64k 65536 10 0 10 1 0 1 1 0 8 1
mcl16k 16384 7 0 7 2 1 1 1 0 8 1
mcl12k 12288 1 0 1 1 0 1 1 0 8 1
mcl8k 8192 9 0 7 1 0 1 1 0 8 0
mcl4k 4096 2797 0 2748 13 5 8 12 0 8 1
mcl2k 2048 407 0 405 6 1 5 5 0 8 4
mextrefs 64 177 0 176 2 1 1 1 0 8 0
mtagpl 96 4 0 4 1 1 0 1 0 8 0
mbufpl 256 6745 0 6584 15 0 15 15 0 8 2
bufpl 272 2832 0 102 182 0 182 182 0 8 0
anonpl 24 89287 0 78037 69 0 69 69 0 187 0
amapchunkpl 152 14490 0 14018 29 0 29 29 0 158 9
amappl16 200 1027 0 525 30 3 27 27 0 8 0
amappl15 192 33 0 32 1 0 1 1 0 8 0
amappl14 184 480 0 479 1 0 1 1 0 8 0
amappl13 176 124 0 114 1 0 1 1 0 8 0
amappl12 168 986 0 959 2 0 2 2 0 8 0
amappl11 160 4 0 4 1 1 0 1 0 8 0
amappl10 152 54 0 44 1 0 1 1 0 8 0
amappl9 144 278 0 278 1 1 0 1 0 8 0
amappl8 136 114 0 113 1 0 1 1 0 8 0
amappl7 128 175 0 164 1 0 1 1 0 8 0
amappl6 120 220 0 218 1 0 1 1 0 8 0
amappl5 112 118 0 109 1 0 1 1 0 8 0
amappl4 104 277 0 262 1 0 1 1 0 8 0
amappl3 96 2880 0 2778 3 0 3 3 0 8 0
amappl2 88 573 0 520 2 0 2 2 0 8 0
amappl1 80 11650 0 11112 14 1 13 14 0 8 1
amappl 88 4131 0 3982 4 0 4 4 0 92 0
uvmvnodes 80 101 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
dma512 512 1 0 1 1 0 1 1 0 8 1
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 9 0 1 1 0 1 1 0 8 0
uaddrrnd 24 690 0 662 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 690 0 662 1 0 1 1 0 8 0
vmmpekpl 168 7173 0 7126 3 0 3 3 0 8 0
vmmpepl 168 51257 0 49075 101 3 98 98 0 357 0
vmsppl 368 689 0 662 4 1 3 4 0 8 0
rwobjpl 40 16357 0 14943 15 0 15 15 0 8 0
pdppl 4096 1386 0 1324 116 50 66 80 0 8 4
pvpl 32 289567 0 272909 140 3 137 137 0 265 0
pmappl 216 689 0 662 3 0 3 3 0 8 1
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 573 0 64 15 0 15 15 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
device_lookup(ffffffff83920d10,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954
disk_lookup(ffffffff83920d10,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1
sdstrategy(ffffef806dcbecc8) at sdstrategy+0x53 sys/scsi/sd.c:530
spec_strategy(ffff80002a7d0ce8) at spec_strategy+0x42 sys/kern/spec_vnops.c:448
VOP_STRATEGY(ffffef8009871948,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
ufs_strategy(ffff80002a7d0d88) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
VOP_STRATEGY(ffffef806e2f0b28,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
bwrite(ffffef806dcbecc8) at bwrite+0x2f5 sys/kern/vfs_bio.c:616
ufs_dirremove(ffffef806e2f0b28,ffffef806f084400,800c,1) at ufs_dirremove+0x28d sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a7d0ef0) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(ffffef806e2f0b28,ffffef8062176a80,ffff80002a7d0fc8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a7662a8,ffffff9c,7f5cf1392c90,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840
syscall(ffff80002a7d1130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f5cf1392c80, count: -14
ddb> machine ddbcpu 1
No such command
ddb> trace
device_lookup(ffffffff83920d10,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954
disk_lookup(ffffffff83920d10,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1
sdstrategy(ffffef806dcbecc8) at sdstrategy+0x53 sys/scsi/sd.c:530
spec_strategy(ffff80002a7d0ce8) at spec_strategy+0x42 sys/kern/spec_vnops.c:448
VOP_STRATEGY(ffffef8009871948,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
ufs_strategy(ffff80002a7d0d88) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
VOP_STRATEGY(ffffef806e2f0b28,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
bwrite(ffffef806dcbecc8) at bwrite+0x2f5 sys/kern/vfs_bio.c:616
ufs_dirremove(ffffef806e2f0b28,ffffef806f084400,800c,1) at ufs_dirremove+0x28d sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a7d0ef0) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(ffffef806e2f0b28,ffffef8062176a80,ffff80002a7d0fc8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a7662a8,ffffff9c,7f5cf1392c90,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840
syscall(ffff80002a7d1130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f5cf1392c80, count: -14
---
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syzbot found the following issue on:
HEAD commit: f3d8a5574675 vmd(8): guard firmware config system state wi..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1538d88e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=2cbc1aa46b0f2ece7b02
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c9e0d599db50/disk-f3d8a557.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a8e2aa836c69/bsd-f3d8a557.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9fac5026645a/kernel-f3d8a557.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2cbc1a...@syzkaller.appspotmail.com
uvm_fault(0xffffef807f230000, 0x798e267b, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at device_lookup+0x7b: movl 0x40(%rax),%r15d
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 3958 49582 0 0x2 0 0 syz-executor
device_lookup(ffffffff83920d10,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954
disk_lookup(ffffffff83920d10,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1
sdstrategy(ffffef806dcbecc8) at sdstrategy+0x53 sys/scsi/sd.c:530
spec_strategy(ffff80002a7d0ce8) at spec_strategy+0x42 sys/kern/spec_vnops.c:448
VOP_STRATEGY(ffffef8009871948,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
ufs_strategy(ffff80002a7d0d88) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
VOP_STRATEGY(ffffef806e2f0b28,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
bwrite(ffffef806dcbecc8) at bwrite+0x2f5 sys/kern/vfs_bio.c:616
ufs_dirremove(ffffef806e2f0b28,ffffef806f084400,800c,1) at ufs_dirremove+0x28d sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a7d0ef0) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(ffffef806e2f0b28,ffffef8062176a80,ffff80002a7d0fc8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a7662a8,ffffff9c,7f5cf1392c90,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840
syscall(ffff80002a7d1130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f5cf1392c80, count: 1
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: uvm_fault(0xffffef807f230000, 0x798e267b, 0, 1) -> e
ddb> show kasan
No such command
ddb> trace
device_lookup(ffffffff83920d10,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954
disk_lookup(ffffffff83920d10,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1
sdstrategy(ffffef806dcbecc8) at sdstrategy+0x53 sys/scsi/sd.c:530
spec_strategy(ffff80002a7d0ce8) at spec_strategy+0x42 sys/kern/spec_vnops.c:448
VOP_STRATEGY(ffffef8009871948,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
ufs_strategy(ffff80002a7d0d88) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
VOP_STRATEGY(ffffef806e2f0b28,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
bwrite(ffffef806dcbecc8) at bwrite+0x2f5 sys/kern/vfs_bio.c:616
ufs_dirremove(ffffef806e2f0b28,ffffef806f084400,800c,1) at ufs_dirremove+0x28d sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a7d0ef0) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(ffffef806e2f0b28,ffffef8062176a80,ffff80002a7d0fc8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a7662a8,ffffff9c,7f5cf1392c90,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840
syscall(ffff80002a7d1130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f5cf1392c80, count: -14
ddb> show registers
rdi 0x2
rsi 0
rbp 0xffff80002a7d0c20
rbx 0xffffef807b9b0600
rdx 0
rcx 0
rax 0x798e263b
r8 0xffffffffffffffff
r9 0x1
r10 0xf4c26ae726c5d522
r11 0x4930f16e10149abf
r12 0x2
r13 0
r14 0x798e263b
r15 0xffffffff83920d10 sd_cd
rip 0xffffffff8263f36b device_lookup+0x7b
cs 0x8
rflags 0x10202 __ALIGN_SIZE+0xf202
rsp 0xffff80002a7d0bf0
ss 0x10
device_lookup+0x7b: movl 0x40(%rax),%r15d
ddb> show proc
PROC (syz-executor) tid=3958 pid=49582 tcnt=1 stat=onproc
flags process=2<EXEC> proc=0
runpri=50, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a766010,0xffff80002a767a10
process=0xffff80002a79c010 user=0xffff80002a7cc000, vmspace=0xffffef807f230000
estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0
ddb> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
11386 228466 47738 0 2 0 0 syz-executor
11386 454276 47738 0 3 0 0x4000080 fsleep syz-executor
38721 96864 11732 0 2 0 0 syz-executor
38721 108111 11732 0 3 0 0x4000080 fsleep syz-executor
72474 213142 86292 0 2 0 0 syz-executor
72474 130541 86292 0 3 0 0x4000080 fsleep syz-executor
44421 147616 94376 0 2 0 0 syz-executor
44421 509918 94376 0 3 0 0x4000080 fsleep syz-executor
79737 252436 9420 0 2 0 0 syz-executor
79737 447361 9420 0 3 0 0x4000080 fsleep syz-executor
79737 8552 9420 0 3 0 0x4000080 fsleep syz-executor
79737 251378 9420 0 3 0 0x4000080 fsleep syz-executor
89237 411361 58192 0 2 0 0 syz-executor
89237 41694 58192 0 3 0 0x4000080 fsleep syz-executor
89237 401663 58192 0 2 0 0x4000000 syz-executor
52664 498709 71757 0 2 0x2 0 syz-executor
86292 488104 71757 0 2 0x2 0xc80 syz-executor
9420 20657 71757 0 2 0x2 0xc80 syz-executor
47738 80080 71757 0 3 0x2 0x80 nanoslp syz-executor
94376 346783 71757 0 2 0x2 0xc80 syz-executor
11732 295231 71757 0 2 0x2 0xc80 syz-executor
58192 309647 71757 0 2 0x2 0xc80 syz-executor
*49582 3958 71757 0 7 0x2 0 syz-executor
71757 242951 18445 0 2 0x2 0 syz-executor
18445 92835 10832 0 3 0x100002 0x88 sigsusp ksh
10832 318100 30299 0 3 0x10 0x88 kqread sshd-session
30299 440627 65718 0 3 0x12 0x80 kqread sshd-session
4891 126530 1 0 3 0x100003 0x80 ttyin getty
65718 170754 1 0 3 0 0x88 kqread sshd
41534 396871 61805 73 3 0x1100010 0x80 kqread syslogd
61805 298445 1 0 3 0x100002 0x80 sbwait syslogd
66458 168600 1 0 3 0x100000 0x80 kqread resolvd
88383 288228 86912 77 3 0x100012 0x80 kqread dhcpleased
74006 361894 86912 77 3 0x100012 0x80 kqread dhcpleased
86912 347443 1 0 3 0 0x80 kqread dhcpleased
87495 243005 0 0 3 0x14000 0x200 bored smr
42592 426686 0 0 2 0x14000 0x200 zerothread
12867 54869 0 0 3 0x14000 0x200 aiodoned aiodoned
67338 266951 0 0 3 0x14000 0x200 syncer update
2743 339382 0 0 3 0x14000 0x200 cleaner cleaner
96317 26285 0 0 3 0x14000 0x200 reaper reaper
78987 84631 0 0 3 0x14000 0x200 pgdaemon pagedaemon
9853 449597 0 0 3 0x14000 0x200 bored viomb
86465 185614 0 0 3 0x14000 0x40000200 acpi0 acpi0
64024 241106 0 0 3 0x14000 0x200 bored softnet0
91803 42679 0 0 3 0x14000 0x200 bored systqmp
42487 13393 0 0 3 0x14000 0x200 bored systq
60644 247666 0 0 3 0x14000 0x40000200 tmoslp softclock
37796 493355 0 0 3 0x14000 0x40000200 idle0
1 237749 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 11042 12183K 12251K 166960K 12374 0
pcb 17 12K 12K 166960K 47 0
rtable 216 6K 9K 166960K 560 0
pf 29 12K 17K 166960K 60 0
ifaddr 38 6K 7K 166960K 71 0
ifgroup 46 2K 2K 166960K 76 0
sysctl 2 1K 9K 166960K 7 0
counters 32 17K 17K 166960K 40 0
ioctlops 0 0K 4K 166960K 68 0
iov 0 0K 16K 166960K 13 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1297 82K 82K 166960K 1535 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 10 0
VM map 2 1K 1K 166960K 2 0
sem 11 0K 0K 166960K 80 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 16 57K 236K 166960K 432 0
sigio 0 0K 0K 166960K 2 0
proc 60 59K 83K 166960K 690 0
subproc 64 4K 4K 166960K 127 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 16 0
in_multi 88 6K 7K 166960K 165 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 16 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 73 334K 334K 166960K 73 0
exec 0 0K 1K 166960K 472 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 212 158K 173K 166960K 4971 0
UVM aobj 9 2K 2K 166960K 10 0
pinsyscall 37 74K 96K 166960K 1685 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 10 0
NDP 10 0K 2K 166960K 46 0
temp 33 9110K 9118K 166960K 14558 0
kqueue 14 22K 26K 166960K 60 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 59 0 56 1 0 1 1 0 8 0
rtentry 136 179 0 80 4 0 4 4 0 8 0
unpcb 144 136 0 119 1 0 1 1 0 8 0
syncache 336 7 0 7 2 1 1 1 0 8 1
tcpcb 736 57 0 52 1 0 1 1 0 8 0
arp 96 30 0 14 1 0 1 1 0 8 0
ipq 40 2 0 0 1 0 1 1 0 8 0
ipqe 40 2 0 0 1 0 1 1 0 8 0
inpcb 328 286 0 276 7 0 7 7 0 8 5
ip6q 72 1 0 0 1 0 1 1 0 8 0
ip6af 40 1 0 0 1 0 1 1 0 8 0
nd6 112 43 0 22 1 0 1 1 0 8 0
kcovpl 48 14 0 7 1 0 1 1 0 8 0
ppxss 1072 1 0 1 1 0 1 1 0 8 1
pfrktable 1344 7 0 7 1 0 1 1 0 8 1
pfstlim 224 1 0 0 1 0 1 1 0 8 0
pfanchor 1288 2 0 2 1 0 1 1 0 8 1
pftag 88 1 0 1 1 0 1 1 0 8 1
pfrule 1360 2 0 2 1 0 1 1 0 8 1
rttmr 136 1 0 1 1 0 1 1 0 8 1
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 722 0 310 29 0 29 29 0 8 1
art_table 40 723 0 310 5 0 5 5 0 8 0
art_node 32 179 0 89 1 0 1 1 0 8 0
sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0
semapl 72 78 0 69 1 0 1 1 0 8 0
shmpl 112 7 0 1 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 1901 0 431 92 0 92 92 0 8 0
ffsino 256 1901 0 431 92 0 92 92 0 8 0
nchpl 144 2382 0 670 64 0 64 64 0 8 0
vnodes 216 2108 0 0 118 0 118 118 0 8 0
namei 1024 7839 0 7839 3 2 1 2 0 8 1
pfiaddrpl 120 2 0 2 1 0 1 1 0 8 1
kstatmem 264 37 0 16 2 0 2 2 0 8 0
scxspl 216 7824 0 7824 4 2 2 3 1 8 2
plimitpl 152 57 0 41 1 0 1 1 0 8 0
sigapl 424 703 0 662 6 1 5 6 0 8 0
knotepl 120 9709 0 9413 11 0 11 11 0 8 2
kqueuepl 184 67 0 57 1 0 1 1 0 8 0
pipepl 304 163 0 136 3 0 3 3 0 8 0
fdescpl 448 690 0 662 5 1 4 5 0 8 0
filepl 120 2799 0 2561 9 0 9 9 0 8 1
lockfpl 104 71 0 68 1 0 1 1 0 8 0
lockfspl 48 34 0 31 1 0 1 1 0 8 0
sessionpl 144 35 0 27 1 0 1 1 0 8 0
pgrppl 48 63 0 47 1 0 1 1 0 8 0
ucredpl 104 312 0 301 1 0 1 1 0 8 0
zombiepl 144 662 0 662 2 1 1 1 0 8 1
processpl 1152 703 0 662 4 0 4 4 0 8 0
procpl 664 975 0 925 5 0 5 5 0 8 0
sockpl 552 491 0 461 8 0 8 8 0 8 5
mcl64k 65536 10 0 10 1 0 1 1 0 8 1
mcl16k 16384 7 0 7 2 1 1 1 0 8 1
mcl12k 12288 1 0 1 1 0 1 1 0 8 1
mcl8k 8192 9 0 7 1 0 1 1 0 8 0
mcl4k 4096 2797 0 2748 13 5 8 12 0 8 1
mcl2k 2048 407 0 405 6 1 5 5 0 8 4
mextrefs 64 177 0 176 2 1 1 1 0 8 0
mtagpl 96 4 0 4 1 1 0 1 0 8 0
mbufpl 256 6745 0 6584 15 0 15 15 0 8 2
bufpl 272 2832 0 102 182 0 182 182 0 8 0
anonpl 24 89287 0 78037 69 0 69 69 0 187 0
amapchunkpl 152 14490 0 14018 29 0 29 29 0 158 9
amappl16 200 1027 0 525 30 3 27 27 0 8 0
amappl15 192 33 0 32 1 0 1 1 0 8 0
amappl14 184 480 0 479 1 0 1 1 0 8 0
amappl13 176 124 0 114 1 0 1 1 0 8 0
amappl12 168 986 0 959 2 0 2 2 0 8 0
amappl11 160 4 0 4 1 1 0 1 0 8 0
amappl10 152 54 0 44 1 0 1 1 0 8 0
amappl9 144 278 0 278 1 1 0 1 0 8 0
amappl8 136 114 0 113 1 0 1 1 0 8 0
amappl7 128 175 0 164 1 0 1 1 0 8 0
amappl6 120 220 0 218 1 0 1 1 0 8 0
amappl5 112 118 0 109 1 0 1 1 0 8 0
amappl4 104 277 0 262 1 0 1 1 0 8 0
amappl3 96 2880 0 2778 3 0 3 3 0 8 0
amappl2 88 573 0 520 2 0 2 2 0 8 0
amappl1 80 11650 0 11112 14 1 13 14 0 8 1
amappl 88 4131 0 3982 4 0 4 4 0 92 0
uvmvnodes 80 101 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
dma512 512 1 0 1 1 0 1 1 0 8 1
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 9 0 1 1 0 1 1 0 8 0
uaddrrnd 24 690 0 662 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 690 0 662 1 0 1 1 0 8 0
vmmpekpl 168 7173 0 7126 3 0 3 3 0 8 0
vmmpepl 168 51257 0 49075 101 3 98 98 0 357 0
vmsppl 368 689 0 662 4 1 3 4 0 8 0
rwobjpl 40 16357 0 14943 15 0 15 15 0 8 0
pdppl 4096 1386 0 1324 116 50 66 80 0 8 4
pvpl 32 289567 0 272909 140 3 137 137 0 265 0
pmappl 216 689 0 662 3 0 3 3 0 8 1
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 573 0 64 15 0 15 15 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
device_lookup(ffffffff83920d10,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954
disk_lookup(ffffffff83920d10,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1
sdstrategy(ffffef806dcbecc8) at sdstrategy+0x53 sys/scsi/sd.c:530
spec_strategy(ffff80002a7d0ce8) at spec_strategy+0x42 sys/kern/spec_vnops.c:448
VOP_STRATEGY(ffffef8009871948,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
ufs_strategy(ffff80002a7d0d88) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
VOP_STRATEGY(ffffef806e2f0b28,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
bwrite(ffffef806dcbecc8) at bwrite+0x2f5 sys/kern/vfs_bio.c:616
ufs_dirremove(ffffef806e2f0b28,ffffef806f084400,800c,1) at ufs_dirremove+0x28d sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a7d0ef0) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(ffffef806e2f0b28,ffffef8062176a80,ffff80002a7d0fc8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a7662a8,ffffff9c,7f5cf1392c90,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840
syscall(ffff80002a7d1130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f5cf1392c80, count: -14
ddb> machine ddbcpu 1
No such command
ddb> trace
device_lookup(ffffffff83920d10,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954
disk_lookup(ffffffff83920d10,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1
sdstrategy(ffffef806dcbecc8) at sdstrategy+0x53 sys/scsi/sd.c:530
spec_strategy(ffff80002a7d0ce8) at spec_strategy+0x42 sys/kern/spec_vnops.c:448
VOP_STRATEGY(ffffef8009871948,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
ufs_strategy(ffff80002a7d0d88) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
VOP_STRATEGY(ffffef806e2f0b28,ffffef806dcbecc8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
bwrite(ffffef806dcbecc8) at bwrite+0x2f5 sys/kern/vfs_bio.c:616
ufs_dirremove(ffffef806e2f0b28,ffffef806f084400,800c,1) at ufs_dirremove+0x28d sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a7d0ef0) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(ffffef806e2f0b28,ffffef8062176a80,ffff80002a7d0fc8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a7662a8,ffffff9c,7f5cf1392c90,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840
syscall(ffff80002a7d1130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7d1130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f5cf1392c80, count: -14
---
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