protection_fault: VOP_LOCK
0 views
Skip to first unread message
syzbot
Mar 23, 2026, 3:20:26 AM (3 days ago) Mar 23
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: ccfcb3e6ef18 Protect IGMP and MLD6 fast timer with rwlock.
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=11a18b52580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=056de719ef87523c6890
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4b16c0101655/disk-ccfcb3e6.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/3ef6986f5ef6/bsd-ccfcb3e6.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1c1a1db90c67/kernel-ccfcb3e6.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+056de7...@syzkaller.appspotmail.com
kernel: protection fault trap, code=0
Stopped at VOP_LOCK+0x9d: movq 0(%rax),%r14
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
the kernel did not panic
ddb> trace
VOP_LOCK(fffffd806c5143c0,1) at VOP_LOCK+0x9d sys/kern/vfs_vops.c:524
vn_lock(fffffd806c5143c0,1) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vget(fffffd806c5143c0,1) at vget+0x2a2 sys/kern/vfs_subr.c:686
ufs_ihashget(400,131c4) at ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
ffs_vget(ffff800000c68400,131c4,ffff80003c8f7480) at ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
ufs_lookup() at ufs_lookup+0x16ad sys/ufs/ufs/ufs_lookup.c:573
VOP_LOOKUP(fffffd8009871438,ffff80003c8f7858,ffff80003c8f7888) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003c8f7828) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567
namei(ffff80003c8f7828) at namei+0x7ca sys/kern/vfs_lookup.c:250
ptmioctl(5100,40287401,ffff80003c8f7b40,3,ffff80003c90ad18) at ptmioctl+0x4db sys/kern/tty_pty.c:1144
VOP_IOCTL(fffffd807b73cb00,40287401,ffff80003c8f7b40,3,fffffd8007ffd958,ffff80003c90ad18) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806cfe39e8,40287401,ffff80003c8f7b40,ffff80003c90ad18) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80003c90ad18,ffff80003c8f7d10,ffff80003c8f7c60) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1
syscall(ffff80003c8f7d10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f7d10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb28c4e3c720, count: -15
ddb> show registers
rdi 0
rsi 0
rbp 0xffff80003c8f7230
rbx 0x280001 acpi_pdirpa+0x26be72
rdx 0xffff8000015db740
rcx 0x777
rax 0x8000200090002
r8 0x30
r9 0
r10 0x3b71bd4baca27adf
r11 0xf2e48a123724326c
r12 0xffffffff838e2ff0 cpu_info_full_primary+0x1ff0
r13 0
r14 0xfffffd806c5143c0
r15 0
rip 0xffffffff83056e0d VOP_LOCK+0x9d
cs 0x8
rflags 0x10202 __ALIGN_SIZE+0xf202
rsp 0xffff80003c8f71e0
ss 0x10
VOP_LOCK+0x9d: movq 0(%rax),%r14
ddb> show proc
PROC (syz-executor) tid=325120 pid=85302 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003c90a020,0xffffffff839e9f50
process=0xffff8000ffff9f98 user=0xffff80003c8f2000, vmspace=0xfffffd806cd2bb90
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
85302 263576 63891 0 2 0 syz-executor
*85302 325120 63891 0 7 0x4000000 syz-executor
5016 111018 20003 0 2 0 syz-executor
5016 77017 20003 0 2 0x4000000 syz-executor
74914 237471 82602 0 2 0 syz-executor
74914 154883 82602 0 3 0x4000080 fsleep syz-executor
42518 489820 90000 0 2 0 syz-executor
42518 228008 90000 0 2 0x4000000 syz-executor
3446 397809 4181 0 2 0 syz-executor
3446 369854 4181 0 3 0x4000080 fsleep syz-executor
3446 26423 4181 0 3 0x4000080 fsleep syz-executor
3446 303858 4181 0 3 0x4000080 fsleep syz-executor
53283 34538 28973 0 2 0 syz-executor
53283 427915 28973 0 3 0x4000080 fsleep syz-executor
90000 473083 49179 0 3 0x82 nanoslp syz-executor
73126 286707 0 0 3 0x14200 acct acct
89878 274328 1 0 3 0x100083 ttyin getty
64249 369860 49179 0 3 0x82 nanoslp syz-executor
20003 289388 49179 0 3 0x82 nanoslp syz-executor
28973 81111 49179 0 3 0x82 nanoslp syz-executor
63891 464956 49179 0 3 0x82 nanoslp syz-executor
78045 207120 49179 0 2 0x2 syz-executor
4181 245630 49179 0 3 0x82 nanoslp syz-executor
82602 457981 49179 0 3 0x82 nanoslp syz-executor
49179 165032 89826 0 2 0x2 syz-executor
89826 79786 18481 0 3 0x10008a sigsusp ksh
18481 351172 72679 0 3 0x98 kqread sshd-session
72679 222962 58553 0 3 0x92 kqread sshd-session
58553 185502 1 0 3 0x88 kqread sshd
99362 465519 66929 73 3 0x1100090 kqread syslogd
66929 246654 1 0 3 0x100082 sbwait syslogd
5526 377681 1 0 3 0x100080 kqread resolvd
13681 72650 14217 77 3 0x100092 kqread dhcpleased
22822 312118 14217 77 3 0x100092 kqread dhcpleased
14217 198334 1 0 3 0x80 kqread dhcpleased
22794 128025 0 0 3 0x14200 bored smr
21758 163380 0 0 2 0x14200 zerothread
70056 321720 0 0 3 0x14200 aiodoned aiodoned
32747 375602 0 0 3 0x14200 syncer update
98187 400959 0 0 3 0x14200 cleaner cleaner
44699 159758 0 0 3 0x14200 reaper reaper
20052 182772 0 0 3 0x14200 pgdaemon pagedaemon
25872 137386 0 0 3 0x14200 bored viomb
2144 101677 0 0 3 0x40014200 acpi0 acpi0
84152 142025 0 0 3 0x14200 bored softnet0
15681 104403 0 0 3 0x14200 smrbar systqmp
37069 483208 0 0 3 0x14200 bored systq
8878 251594 0 0 3 0x40014200 tmoslp softclock
48775 481115 0 0 3 0x40014200 idle0
1 334231 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11046 12110K 12490K 166960K 13997 0
pcb 17 12K 12K 166960K 192 0
rtable 184 7K 7K 166960K 528 0
pf 30 13K 16K 166960K 143 0
ifaddr 33 5K 7K 166960K 107 0
ifgroup 41 1K 2K 166960K 187 0
sysctl 4 1K 9K 166960K 10 0
counters 32 17K 18K 166960K 92 0
ioctlops 0 0K 4K 166960K 151 0
iov 0 0K 24K 166960K 33 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1291 81K 82K 166960K 2252 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 9 0
VM map 2 1K 1K 166960K 2 0
sem 12 10K 10K 166960K 33 0
dirhash 15 2K 2K 166960K 42 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 93K 166960K 1785 0
sigio 0 0K 0K 166960K 31 0
proc 60 59K 100K 166960K 623 0
subproc 72 4K 4K 166960K 81 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 79 0
in_multi 70 5K 7K 166960K 185 0
ether_multi 1 0K 0K 166960K 26 0
mrt 0 0K 0K 166960K 49 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 121 546K 546K 166960K 121 0
exec 0 0K 1K 166960K 494 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 217 172K 179K 166960K 16597 0
UVM aobj 28 25K 25K 166960K 30 0
pinsyscall 38 76K 94K 166960K 2979 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 60 0
NDP 10 0K 2K 166960K 71 0
temp 47 9068K 9194K 166960K 21969 0
kqueue 14 22K 29K 166960K 242 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 81 0 78 1 0 1 1 0 8 0
rtentry 136 160 0 86 4 0 4 4 0 8 0
unpcb 144 421 0 406 1 0 1 1 0 8 0
syncache 336 10 0 10 1 0 1 1 0 8 1
tcpqe 32 37 0 37 1 0 1 1 0 8 1
tcpcb 736 188 0 180 1 0 1 1 0 8 0
arp 96 23 0 10 1 0 1 1 0 8 0
ipq 40 5 0 1 1 0 1 1 0 8 0
ipqe 40 9 0 3 1 0 1 1 0 8 0
inpcb 328 589 0 576 2 0 2 2 0 8 0
ip6q 72 2 0 0 1 0 1 1 0 8 0
ip6af 40 2 0 0 1 0 1 1 0 8 0
nd6 112 29 0 12 1 0 1 1 0 8 0
pkpcb 40 5 0 5 1 0 1 1 0 8 1
kcovpl 48 9 0 1 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 0 1 1 0 8 1
ppxss 1072 38 0 37 1 0 1 1 0 8 0
pppxif 1416 12 0 12 1 0 1 1 0 8 1
pfstscr 40 1 0 0 1 0 1 1 0 8 0
pfrktable 1344 1 0 1 1 0 1 1 0 8 1
pfanchor 1288 2 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 5 0 1 1 0 1 1 0 8 0
pfstkey 128 10 0 5 1 0 1 1 0 8 0
pfstate 384 5 0 3 1 0 1 1 0 8 0
pfrule 1360 8 0 7 1 0 1 1 0 8 0
rttmr 136 6 0 6 1 0 1 1 0 8 1
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 741 0 404 29 2 27 29 0 8 5
art_table 40 743 0 404 5 0 5 5 0 8 0
art_node 32 159 0 91 1 0 1 1 0 8 0
sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0
semupl 112 2 0 2 1 0 1 1 0 8 1
semapl 112 25 0 15 1 0 1 1 0 8 0
shmpl 112 16 0 1 1 0 1 1 0 8 0
dirhash 1024 37 0 18 3 0 3 3 0 8 0
dino2pl 256 4184 0 2727 92 0 92 92 0 8 0
ffsino 256 4184 0 2727 92 0 92 92 0 8 0
nchpl 144 6232 0 4536 64 0 64 64 0 8 0
rtmask 32 2 0 2 1 0 1 1 0 8 1
vnodes 216 4725 0 0 263 0 263 263 0 8 0
vnodes: pool(0xffffffff839f7218:vnodes): page inconsistency: page 0x0; at page head addr 0xfffffd806c514f90 (p 0xfffffd806c514000)
namei 1024 17150 0 17149 2 0 2 2 0 8 1
vcpupl 3904 11 0 1 2 0 2 2 0 8 0
vmpool 808 11 0 1 2 0 2 2 0 8 0
kstatmem 264 104 0 84 2 0 2 2 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 10 0 10 1 0 1 1 0 8 1
scxspl 216 22712 0 22712 8 0 8 8 1 8 8
plimitpl 152 256 0 237 1 0 1 1 0 8 0
sigapl 424 2096 0 2053 6 0 6 6 0 8 0
knotepl 120 67635 0 67586 29 19 10 17 0 8 8
kqueuepl 184 243 0 232 1 0 1 1 0 8 0
pipepl 304 160 0 133 3 0 3 3 0 8 0
fdescpl 448 2079 0 2050 5 0 5 5 0 8 1
filepl 120 6705 0 6489 7 0 7 7 0 8 0
lockfpl 104 417 0 415 1 0 1 1 0 8 0
lockfspl 48 173 0 171 1 0 1 1 0 8 0
sessionpl 144 30 0 22 1 0 1 1 0 8 0
pgrppl 48 44 0 28 1 0 1 1 0 8 0
ucredpl 104 1565 0 1553 1 0 1 1 0 8 0
zombiepl 144 2054 0 2053 1 0 1 1 0 8 0
processpl 1152 2096 0 2053 4 0 4 4 0 8 0
procpl 664 3995 0 3944 6 0 6 6 0 8 0
sockpl 552 1105 0 1074 4 0 4 4 0 8 1
mcl64k 65536 631 0 630 1 0 1 1 0 8 0
mcl16k 16384 385 0 385 1 0 1 1 0 8 1
mcl12k 12288 262 0 262 1 0 1 1 0 8 1
mcl9k 9216 55 0 55 1 0 1 1 0 8 1
mcl8k 8192 248 0 248 1 0 1 1 0 8 1
mcl4k 4096 5849 0 5796 14 0 14 14 0 8 7
mcl2k2 2112 6 0 6 1 0 1 1 0 8 1
mcl2k 2048 572 0 566 1 0 1 1 0 8 0
mtagpl 96 33 0 6 1 0 1 1 0 8 0
mbufpl 256 26270 0 26103 16 0 16 16 0 8 4
bufpl 280 7702 0 1488 445 0 445 445 0 8 0
anonpl 24 231525 0 228215 45 0 45 45 0 187 15
amapchunkpl 152 54244 0 53618 31 0 31 31 0 158 6
amappl16 200 3446 0 3411 24 11 13 15 0 8 8
amappl14 184 426 0 425 1 0 1 1 0 8 0
amappl13 176 135 0 125 1 0 1 1 0 8 0
amappl12 168 2324 0 2296 2 0 2 2 0 8 0
amappl10 152 54 0 44 1 0 1 1 0 8 0
amappl9 144 263 0 263 1 0 1 1 0 8 1
amappl8 136 108 0 107 1 0 1 1 0 8 0
amappl7 128 154 0 143 1 0 1 1 0 8 0
amappl6 120 154 0 153 1 0 1 1 0 8 0
amappl5 112 104 0 97 1 0 1 1 0 8 0
amappl4 104 288 0 272 1 0 1 1 0 8 0
amappl3 96 11878 0 11777 4 0 4 4 0 8 0
amappl2 88 622 0 570 2 0 2 2 0 8 0
amappl1 80 19169 0 18617 15 0 15 15 0 8 2
amappl 88 15726 0 15573 5 0 5 5 0 92 0
uvmvnodes 80 136 0 0 3 0 3 3 0 8 0
dma16384 16384 1 0 1 1 0 1 1 0 8 1
dma8192 8192 1 0 1 1 0 1 1 0 8 1
dma4096 4096 1 0 1 1 0 1 1 0 8 1
dma2048 2048 1 0 1 1 0 1 1 0 8 1
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 0 1 1 0 8 1
dma128 128 258 0 258 1 0 1 1 0 8 1
dma64 64 6 0 6 1 0 1 1 0 8 1
dma32 32 7 0 7 1 0 1 1 0 8 1
dma16 16 19 0 18 1 0 1 1 0 8 0
aobjpl 72 29 0 2 1 0 1 1 0 8 0
uaddrrnd 24 2079 0 2050 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2079 0 2050 1 0 1 1 0 8 0
vmmpekpl 168 16410 0 16368 3 0 3 3 0 8 0
vmmpepl 168 133146 0 131376 93 0 93 93 0 357 11
vmsppl 368 2078 0 2050 4 0 4 4 0 8 1
rwobjpl 40 32993 0 31998 13 0 13 13 0 8 0
pdppl 4096 4186 0 4112 118 41 77 80 0 8 3
pvpl 32 960402 0 951130 127 0 127 127 0 265 26
pmappl 216 2089 0 2051 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 394 0 43 11 0 11 11 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
VOP_LOCK(fffffd806c5143c0,1) at VOP_LOCK+0x9d sys/kern/vfs_vops.c:524
vn_lock(fffffd806c5143c0,1) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vget(fffffd806c5143c0,1) at vget+0x2a2 sys/kern/vfs_subr.c:686
ufs_ihashget(400,131c4) at ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
ffs_vget(ffff800000c68400,131c4,ffff80003c8f7480) at ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
ufs_lookup() at ufs_lookup+0x16ad sys/ufs/ufs/ufs_lookup.c:573
VOP_LOOKUP(fffffd8009871438,ffff80003c8f7858,ffff80003c8f7888) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003c8f7828) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567
namei(ffff80003c8f7828) at namei+0x7ca sys/kern/vfs_lookup.c:250
ptmioctl(5100,40287401,ffff80003c8f7b40,3,ffff80003c90ad18) at ptmioctl+0x4db sys/kern/tty_pty.c:1144
VOP_IOCTL(fffffd807b73cb00,40287401,ffff80003c8f7b40,3,fffffd8007ffd958,ffff80003c90ad18) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806cfe39e8,40287401,ffff80003c8f7b40,ffff80003c90ad18) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80003c90ad18,ffff80003c8f7d10,ffff80003c8f7c60) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1
syscall(ffff80003c8f7d10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f7d10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb28c4e3c720, count: -15
ddb> machine ddbcpu 1
No such command
ddb> trace
VOP_LOCK(fffffd806c5143c0,1) at VOP_LOCK+0x9d sys/kern/vfs_vops.c:524
vn_lock(fffffd806c5143c0,1) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vget(fffffd806c5143c0,1) at vget+0x2a2 sys/kern/vfs_subr.c:686
ufs_ihashget(400,131c4) at ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
ffs_vget(ffff800000c68400,131c4,ffff80003c8f7480) at ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
ufs_lookup() at ufs_lookup+0x16ad sys/ufs/ufs/ufs_lookup.c:573
VOP_LOOKUP(fffffd8009871438,ffff80003c8f7858,ffff80003c8f7888) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003c8f7828) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567
namei(ffff80003c8f7828) at namei+0x7ca sys/kern/vfs_lookup.c:250
ptmioctl(5100,40287401,ffff80003c8f7b40,3,ffff80003c90ad18) at ptmioctl+0x4db sys/kern/tty_pty.c:1144
VOP_IOCTL(fffffd807b73cb00,40287401,ffff80003c8f7b40,3,fffffd8007ffd958,ffff80003c90ad18) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806cfe39e8,40287401,ffff80003c8f7b40,ffff80003c90ad18) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80003c90ad18,ffff80003c8f7d10,ffff80003c8f7c60) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1
syscall(ffff80003c8f7d10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f7d10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb28c4e3c720, count: -15
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: ccfcb3e6ef18 Protect IGMP and MLD6 fast timer with rwlock.
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=11a18b52580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=056de719ef87523c6890
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4b16c0101655/disk-ccfcb3e6.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/3ef6986f5ef6/bsd-ccfcb3e6.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1c1a1db90c67/kernel-ccfcb3e6.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+056de7...@syzkaller.appspotmail.com
kernel: protection fault trap, code=0
Stopped at VOP_LOCK+0x9d: movq 0(%rax),%r14
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
the kernel did not panic
ddb> trace
VOP_LOCK(fffffd806c5143c0,1) at VOP_LOCK+0x9d sys/kern/vfs_vops.c:524
vn_lock(fffffd806c5143c0,1) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vget(fffffd806c5143c0,1) at vget+0x2a2 sys/kern/vfs_subr.c:686
ufs_ihashget(400,131c4) at ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
ffs_vget(ffff800000c68400,131c4,ffff80003c8f7480) at ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
ufs_lookup() at ufs_lookup+0x16ad sys/ufs/ufs/ufs_lookup.c:573
VOP_LOOKUP(fffffd8009871438,ffff80003c8f7858,ffff80003c8f7888) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003c8f7828) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567
namei(ffff80003c8f7828) at namei+0x7ca sys/kern/vfs_lookup.c:250
ptmioctl(5100,40287401,ffff80003c8f7b40,3,ffff80003c90ad18) at ptmioctl+0x4db sys/kern/tty_pty.c:1144
VOP_IOCTL(fffffd807b73cb00,40287401,ffff80003c8f7b40,3,fffffd8007ffd958,ffff80003c90ad18) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806cfe39e8,40287401,ffff80003c8f7b40,ffff80003c90ad18) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80003c90ad18,ffff80003c8f7d10,ffff80003c8f7c60) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1
syscall(ffff80003c8f7d10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f7d10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb28c4e3c720, count: -15
ddb> show registers
rdi 0
rsi 0
rbp 0xffff80003c8f7230
rbx 0x280001 acpi_pdirpa+0x26be72
rdx 0xffff8000015db740
rcx 0x777
rax 0x8000200090002
r8 0x30
r9 0
r10 0x3b71bd4baca27adf
r11 0xf2e48a123724326c
r12 0xffffffff838e2ff0 cpu_info_full_primary+0x1ff0
r13 0
r14 0xfffffd806c5143c0
r15 0
rip 0xffffffff83056e0d VOP_LOCK+0x9d
cs 0x8
rflags 0x10202 __ALIGN_SIZE+0xf202
rsp 0xffff80003c8f71e0
ss 0x10
VOP_LOCK+0x9d: movq 0(%rax),%r14
ddb> show proc
PROC (syz-executor) tid=325120 pid=85302 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003c90a020,0xffffffff839e9f50
process=0xffff8000ffff9f98 user=0xffff80003c8f2000, vmspace=0xfffffd806cd2bb90
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
85302 263576 63891 0 2 0 syz-executor
*85302 325120 63891 0 7 0x4000000 syz-executor
5016 111018 20003 0 2 0 syz-executor
5016 77017 20003 0 2 0x4000000 syz-executor
74914 237471 82602 0 2 0 syz-executor
74914 154883 82602 0 3 0x4000080 fsleep syz-executor
42518 489820 90000 0 2 0 syz-executor
42518 228008 90000 0 2 0x4000000 syz-executor
3446 397809 4181 0 2 0 syz-executor
3446 369854 4181 0 3 0x4000080 fsleep syz-executor
3446 26423 4181 0 3 0x4000080 fsleep syz-executor
3446 303858 4181 0 3 0x4000080 fsleep syz-executor
53283 34538 28973 0 2 0 syz-executor
53283 427915 28973 0 3 0x4000080 fsleep syz-executor
90000 473083 49179 0 3 0x82 nanoslp syz-executor
73126 286707 0 0 3 0x14200 acct acct
89878 274328 1 0 3 0x100083 ttyin getty
64249 369860 49179 0 3 0x82 nanoslp syz-executor
20003 289388 49179 0 3 0x82 nanoslp syz-executor
28973 81111 49179 0 3 0x82 nanoslp syz-executor
63891 464956 49179 0 3 0x82 nanoslp syz-executor
78045 207120 49179 0 2 0x2 syz-executor
4181 245630 49179 0 3 0x82 nanoslp syz-executor
82602 457981 49179 0 3 0x82 nanoslp syz-executor
49179 165032 89826 0 2 0x2 syz-executor
89826 79786 18481 0 3 0x10008a sigsusp ksh
18481 351172 72679 0 3 0x98 kqread sshd-session
72679 222962 58553 0 3 0x92 kqread sshd-session
58553 185502 1 0 3 0x88 kqread sshd
99362 465519 66929 73 3 0x1100090 kqread syslogd
66929 246654 1 0 3 0x100082 sbwait syslogd
5526 377681 1 0 3 0x100080 kqread resolvd
13681 72650 14217 77 3 0x100092 kqread dhcpleased
22822 312118 14217 77 3 0x100092 kqread dhcpleased
14217 198334 1 0 3 0x80 kqread dhcpleased
22794 128025 0 0 3 0x14200 bored smr
21758 163380 0 0 2 0x14200 zerothread
70056 321720 0 0 3 0x14200 aiodoned aiodoned
32747 375602 0 0 3 0x14200 syncer update
98187 400959 0 0 3 0x14200 cleaner cleaner
44699 159758 0 0 3 0x14200 reaper reaper
20052 182772 0 0 3 0x14200 pgdaemon pagedaemon
25872 137386 0 0 3 0x14200 bored viomb
2144 101677 0 0 3 0x40014200 acpi0 acpi0
84152 142025 0 0 3 0x14200 bored softnet0
15681 104403 0 0 3 0x14200 smrbar systqmp
37069 483208 0 0 3 0x14200 bored systq
8878 251594 0 0 3 0x40014200 tmoslp softclock
48775 481115 0 0 3 0x40014200 idle0
1 334231 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11046 12110K 12490K 166960K 13997 0
pcb 17 12K 12K 166960K 192 0
rtable 184 7K 7K 166960K 528 0
pf 30 13K 16K 166960K 143 0
ifaddr 33 5K 7K 166960K 107 0
ifgroup 41 1K 2K 166960K 187 0
sysctl 4 1K 9K 166960K 10 0
counters 32 17K 18K 166960K 92 0
ioctlops 0 0K 4K 166960K 151 0
iov 0 0K 24K 166960K 33 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1291 81K 82K 166960K 2252 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 9 0
VM map 2 1K 1K 166960K 2 0
sem 12 10K 10K 166960K 33 0
dirhash 15 2K 2K 166960K 42 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 93K 166960K 1785 0
sigio 0 0K 0K 166960K 31 0
proc 60 59K 100K 166960K 623 0
subproc 72 4K 4K 166960K 81 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 79 0
in_multi 70 5K 7K 166960K 185 0
ether_multi 1 0K 0K 166960K 26 0
mrt 0 0K 0K 166960K 49 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 121 546K 546K 166960K 121 0
exec 0 0K 1K 166960K 494 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 217 172K 179K 166960K 16597 0
UVM aobj 28 25K 25K 166960K 30 0
pinsyscall 38 76K 94K 166960K 2979 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 60 0
NDP 10 0K 2K 166960K 71 0
temp 47 9068K 9194K 166960K 21969 0
kqueue 14 22K 29K 166960K 242 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 81 0 78 1 0 1 1 0 8 0
rtentry 136 160 0 86 4 0 4 4 0 8 0
unpcb 144 421 0 406 1 0 1 1 0 8 0
syncache 336 10 0 10 1 0 1 1 0 8 1
tcpqe 32 37 0 37 1 0 1 1 0 8 1
tcpcb 736 188 0 180 1 0 1 1 0 8 0
arp 96 23 0 10 1 0 1 1 0 8 0
ipq 40 5 0 1 1 0 1 1 0 8 0
ipqe 40 9 0 3 1 0 1 1 0 8 0
inpcb 328 589 0 576 2 0 2 2 0 8 0
ip6q 72 2 0 0 1 0 1 1 0 8 0
ip6af 40 2 0 0 1 0 1 1 0 8 0
nd6 112 29 0 12 1 0 1 1 0 8 0
pkpcb 40 5 0 5 1 0 1 1 0 8 1
kcovpl 48 9 0 1 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 0 1 1 0 8 1
ppxss 1072 38 0 37 1 0 1 1 0 8 0
pppxif 1416 12 0 12 1 0 1 1 0 8 1
pfstscr 40 1 0 0 1 0 1 1 0 8 0
pfrktable 1344 1 0 1 1 0 1 1 0 8 1
pfanchor 1288 2 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 5 0 1 1 0 1 1 0 8 0
pfstkey 128 10 0 5 1 0 1 1 0 8 0
pfstate 384 5 0 3 1 0 1 1 0 8 0
pfrule 1360 8 0 7 1 0 1 1 0 8 0
rttmr 136 6 0 6 1 0 1 1 0 8 1
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 741 0 404 29 2 27 29 0 8 5
art_table 40 743 0 404 5 0 5 5 0 8 0
art_node 32 159 0 91 1 0 1 1 0 8 0
sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0
semupl 112 2 0 2 1 0 1 1 0 8 1
semapl 112 25 0 15 1 0 1 1 0 8 0
shmpl 112 16 0 1 1 0 1 1 0 8 0
dirhash 1024 37 0 18 3 0 3 3 0 8 0
dino2pl 256 4184 0 2727 92 0 92 92 0 8 0
ffsino 256 4184 0 2727 92 0 92 92 0 8 0
nchpl 144 6232 0 4536 64 0 64 64 0 8 0
rtmask 32 2 0 2 1 0 1 1 0 8 1
vnodes 216 4725 0 0 263 0 263 263 0 8 0
vnodes: pool(0xffffffff839f7218:vnodes): page inconsistency: page 0x0; at page head addr 0xfffffd806c514f90 (p 0xfffffd806c514000)
namei 1024 17150 0 17149 2 0 2 2 0 8 1
vcpupl 3904 11 0 1 2 0 2 2 0 8 0
vmpool 808 11 0 1 2 0 2 2 0 8 0
kstatmem 264 104 0 84 2 0 2 2 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 10 0 10 1 0 1 1 0 8 1
scxspl 216 22712 0 22712 8 0 8 8 1 8 8
plimitpl 152 256 0 237 1 0 1 1 0 8 0
sigapl 424 2096 0 2053 6 0 6 6 0 8 0
knotepl 120 67635 0 67586 29 19 10 17 0 8 8
kqueuepl 184 243 0 232 1 0 1 1 0 8 0
pipepl 304 160 0 133 3 0 3 3 0 8 0
fdescpl 448 2079 0 2050 5 0 5 5 0 8 1
filepl 120 6705 0 6489 7 0 7 7 0 8 0
lockfpl 104 417 0 415 1 0 1 1 0 8 0
lockfspl 48 173 0 171 1 0 1 1 0 8 0
sessionpl 144 30 0 22 1 0 1 1 0 8 0
pgrppl 48 44 0 28 1 0 1 1 0 8 0
ucredpl 104 1565 0 1553 1 0 1 1 0 8 0
zombiepl 144 2054 0 2053 1 0 1 1 0 8 0
processpl 1152 2096 0 2053 4 0 4 4 0 8 0
procpl 664 3995 0 3944 6 0 6 6 0 8 0
sockpl 552 1105 0 1074 4 0 4 4 0 8 1
mcl64k 65536 631 0 630 1 0 1 1 0 8 0
mcl16k 16384 385 0 385 1 0 1 1 0 8 1
mcl12k 12288 262 0 262 1 0 1 1 0 8 1
mcl9k 9216 55 0 55 1 0 1 1 0 8 1
mcl8k 8192 248 0 248 1 0 1 1 0 8 1
mcl4k 4096 5849 0 5796 14 0 14 14 0 8 7
mcl2k2 2112 6 0 6 1 0 1 1 0 8 1
mcl2k 2048 572 0 566 1 0 1 1 0 8 0
mtagpl 96 33 0 6 1 0 1 1 0 8 0
mbufpl 256 26270 0 26103 16 0 16 16 0 8 4
bufpl 280 7702 0 1488 445 0 445 445 0 8 0
anonpl 24 231525 0 228215 45 0 45 45 0 187 15
amapchunkpl 152 54244 0 53618 31 0 31 31 0 158 6
amappl16 200 3446 0 3411 24 11 13 15 0 8 8
amappl14 184 426 0 425 1 0 1 1 0 8 0
amappl13 176 135 0 125 1 0 1 1 0 8 0
amappl12 168 2324 0 2296 2 0 2 2 0 8 0
amappl10 152 54 0 44 1 0 1 1 0 8 0
amappl9 144 263 0 263 1 0 1 1 0 8 1
amappl8 136 108 0 107 1 0 1 1 0 8 0
amappl7 128 154 0 143 1 0 1 1 0 8 0
amappl6 120 154 0 153 1 0 1 1 0 8 0
amappl5 112 104 0 97 1 0 1 1 0 8 0
amappl4 104 288 0 272 1 0 1 1 0 8 0
amappl3 96 11878 0 11777 4 0 4 4 0 8 0
amappl2 88 622 0 570 2 0 2 2 0 8 0
amappl1 80 19169 0 18617 15 0 15 15 0 8 2
amappl 88 15726 0 15573 5 0 5 5 0 92 0
uvmvnodes 80 136 0 0 3 0 3 3 0 8 0
dma16384 16384 1 0 1 1 0 1 1 0 8 1
dma8192 8192 1 0 1 1 0 1 1 0 8 1
dma4096 4096 1 0 1 1 0 1 1 0 8 1
dma2048 2048 1 0 1 1 0 1 1 0 8 1
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 0 1 1 0 8 1
dma128 128 258 0 258 1 0 1 1 0 8 1
dma64 64 6 0 6 1 0 1 1 0 8 1
dma32 32 7 0 7 1 0 1 1 0 8 1
dma16 16 19 0 18 1 0 1 1 0 8 0
aobjpl 72 29 0 2 1 0 1 1 0 8 0
uaddrrnd 24 2079 0 2050 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2079 0 2050 1 0 1 1 0 8 0
vmmpekpl 168 16410 0 16368 3 0 3 3 0 8 0
vmmpepl 168 133146 0 131376 93 0 93 93 0 357 11
vmsppl 368 2078 0 2050 4 0 4 4 0 8 1
rwobjpl 40 32993 0 31998 13 0 13 13 0 8 0
pdppl 4096 4186 0 4112 118 41 77 80 0 8 3
pvpl 32 960402 0 951130 127 0 127 127 0 265 26
pmappl 216 2089 0 2051 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 394 0 43 11 0 11 11 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
VOP_LOCK(fffffd806c5143c0,1) at VOP_LOCK+0x9d sys/kern/vfs_vops.c:524
vn_lock(fffffd806c5143c0,1) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vget(fffffd806c5143c0,1) at vget+0x2a2 sys/kern/vfs_subr.c:686
ufs_ihashget(400,131c4) at ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
ffs_vget(ffff800000c68400,131c4,ffff80003c8f7480) at ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
ufs_lookup() at ufs_lookup+0x16ad sys/ufs/ufs/ufs_lookup.c:573
VOP_LOOKUP(fffffd8009871438,ffff80003c8f7858,ffff80003c8f7888) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003c8f7828) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567
namei(ffff80003c8f7828) at namei+0x7ca sys/kern/vfs_lookup.c:250
ptmioctl(5100,40287401,ffff80003c8f7b40,3,ffff80003c90ad18) at ptmioctl+0x4db sys/kern/tty_pty.c:1144
VOP_IOCTL(fffffd807b73cb00,40287401,ffff80003c8f7b40,3,fffffd8007ffd958,ffff80003c90ad18) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806cfe39e8,40287401,ffff80003c8f7b40,ffff80003c90ad18) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80003c90ad18,ffff80003c8f7d10,ffff80003c8f7c60) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1
syscall(ffff80003c8f7d10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f7d10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb28c4e3c720, count: -15
ddb> machine ddbcpu 1
No such command
ddb> trace
VOP_LOCK(fffffd806c5143c0,1) at VOP_LOCK+0x9d sys/kern/vfs_vops.c:524
vn_lock(fffffd806c5143c0,1) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vget(fffffd806c5143c0,1) at vget+0x2a2 sys/kern/vfs_subr.c:686
ufs_ihashget(400,131c4) at ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
ffs_vget(ffff800000c68400,131c4,ffff80003c8f7480) at ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
ufs_lookup() at ufs_lookup+0x16ad sys/ufs/ufs/ufs_lookup.c:573
VOP_LOOKUP(fffffd8009871438,ffff80003c8f7858,ffff80003c8f7888) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003c8f7828) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567
namei(ffff80003c8f7828) at namei+0x7ca sys/kern/vfs_lookup.c:250
ptmioctl(5100,40287401,ffff80003c8f7b40,3,ffff80003c90ad18) at ptmioctl+0x4db sys/kern/tty_pty.c:1144
VOP_IOCTL(fffffd807b73cb00,40287401,ffff80003c8f7b40,3,fffffd8007ffd958,ffff80003c90ad18) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806cfe39e8,40287401,ffff80003c8f7b40,ffff80003c90ad18) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80003c90ad18,ffff80003c8f7d10,ffff80003c8f7c60) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1
syscall(ffff80003c8f7d10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f7d10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb28c4e3c720, count: -15
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
Reply all
Reply to author
Forward
0 new messages