uvm_fault: ffs_nodealloccg (3)
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syzbot
Sep 26, 2025, 12:08:31 AMSep 26
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: bdcea57388aa Move initializaion of UVM vnode descriptors i..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14edbce2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=546e2cd879b0f7313b6d
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3cb68eb6a891/disk-bdcea573.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/0ef4565bb902/bsd-bdcea573.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/fb5bf3115915/kernel-bdcea573.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+546e2c...@syzkaller.appspotmail.com
uvm_fault(0xffffffff838e9870, 0xffff800027c92004, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at ffs_nodealloccg+0x13c: movl 0x4(%rbx),%r15d
TID PID UID PRFLAGS PFLAGS CPU COMMAND
284556 57587 0 0 0 0 syz-executor
*165473 79710 0 0x2 0 1K syz-executor
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c sys/ufs/ffs/ffs_alloc.c:1106
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:824 [inline]
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 sys/ufs/ffs/ffs_alloc.c:390
ufs_mkdir(ffff80002a349d60) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
VOP_MKDIR(fffffd806f11edb0,ffff80002a349ec0,ffff80002a349ef0,ffff80002a349df0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
domkdirat(ffff80003c40b4e0,ffffff9c,788bc45f3530,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3113
syscall(ffff80002a34a070) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a34a070) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x788bc45f34f0, count: 8
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xffffffff838e9870, 0xffff800027c92004, 0, 1) -> d
ddb{1}> trace
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c sys/ufs/ffs/ffs_alloc.c:1106
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:824 [inline]
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 sys/ufs/ffs/ffs_alloc.c:390
ufs_mkdir(ffff80002a349d60) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
VOP_MKDIR(fffffd806f11edb0,ffff80002a349ec0,ffff80002a349ef0,ffff80002a349df0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
domkdirat(ffff80003c40b4e0,ffffff9c,788bc45f3530,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3113
syscall(ffff80002a34a070) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a34a070) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x788bc45f34f0, count: -7
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80002a349b10
rbx 0xffff800027c92000
rdx 0
rcx 0xffff80003c40b4e0
rax 0xffff8000299edff0
r8 0xffffffffffffffff
r9 0
r10 0xa7d3a9ef3f953c97
r11 0x44ee13a09188edc3
r12 0xffff800000b50000
r13 0xfffffd805bd66460
r14 0x5
r15 0
rip 0xffffffff81bd50dc ffs_nodealloccg+0x13c
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a349a60
ss 0x10
ffs_nodealloccg+0x13c: movl 0x4(%rbx),%r15d
ddb{1}> show proc
PROC (syz-executor) tid=165473 pid=79710 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=0xffff80003c40a7e8,0xffff80003c40b788
process=0xffff80002a3ceb68 user=0xffff80002a345000, vmspace=0xfffffd800b0273d0
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
57587 284556 40033 0 7 0 syz-executor
*79710 165473 40033 0 7 0x2 syz-executor
64837 29507 40033 0 2 0 syz-executor
1339 492914 0 0 3 0x14200 acct acct
62766 97159 0 0 3 0x14280 nfsidl nfsio
31275 391530 0 0 3 0x14280 nfsidl nfsio
91562 332256 0 0 3 0x14280 nfsidl nfsio
84036 376690 0 0 3 0x14280 nfsidl nfsio
71839 371074 0 0 3 0x14200 bored sosplice
40033 75045 32447 0 2 0x10000002 syz-executor
32447 451096 38136 0 3 0x10008a sigsusp ksh
38136 391398 65417 0 3 0x98 kqread sshd-session
65417 169125 86581 0 3 0x92 kqread sshd-session
61344 387727 1 0 3 0x100083 ttyopn getty
86581 396012 1 0 3 0x88 kqread sshd
91260 188062 71883 74 3 0x1100092 bpf pflogd
71883 494771 1 0 3 0x80 sbwait pflogd
66254 66453 61363 73 3 0x1100090 kqread syslogd
61363 323815 1 0 3 0x100082 sbwait syslogd
84514 110094 1 0 3 0x100080 kqread resolvd
18747 354459 68952 77 3 0x100092 kqread dhcpleased
50820 3820 68952 77 3 0x100092 kqread dhcpleased
68952 7393 1 0 3 0x80 kqread dhcpleased
56653 483770 0 0 3 0x14200 bored smr
45125 299793 0 0 2 0x14200 zerothread
22428 166274 0 0 3 0x14200 aiodoned aiodoned
70957 64851 0 0 3 0x14200 syncer update
7892 252879 0 0 3 0x14200 cleaner cleaner
7327 368440 0 0 3 0x14200 reaper reaper
94078 167291 0 0 3 0x14200 pgdaemon pagedaemon
87050 211177 0 0 3 0x14200 bored viomb
11039 57942 0 0 3 0x40014200 acpi0 acpi0
96983 366943 0 0 3 0x40014200 idle1
55910 218336 0 0 3 0x14200 bored softnet1
28052 154398 0 0 3 0x14200 bored softnet0
65241 447556 0 0 3 0x14200 smrbar systqmp
58152 424972 0 0 3 0x14200 bored systq
23237 291763 0 0 3 0x14200 tmoslp softclockmp
72035 380205 0 0 3 0x40014200 tmoslp softclock
84691 20862 0 0 3 0x40014200 idle0
1 165160 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 79710 (syz-executor) thread 0xffff80003c40b4e0 (165473)
exclusive rrwlock inode r = 0 (0xfffffd806f30fa18)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
#6 namei+0x7ca sys/kern/vfs_lookup.c:250
#7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098
#8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
#9 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83921c38)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
#1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748
#2 Xsyscall+0x128
Process 65241 (systqmp) thread 0xffff8000ffffecf8 (447556)
shared rwlock systqmp r = 0 (0xffffffff837a1ee8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10178 11002K 11472K 166960K 12015 0
pcb 17 13K 20K 166960K 270 0
rtable 67 6K 10K 166960K 376 0
pf 19 15K 30K 166960K 133 0
ifaddr 11 1K 8K 166960K 84 0
ifgroup 22 1K 2K 166960K 113 0
sysctl 3 1K 9K 166960K 14 0
counters 52 34K 38K 166960K 208 0
ioctlops 0 0K 4K 166960K 1608 0
iov 0 0K 20K 166960K 98 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1456 92K 92K 166960K 1998 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 11 0
VM map 2 1K 1K 166960K 2 0
sem 15 1K 1K 166960K 27 0
dirhash 12 2K 2K 166960K 24 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 5 4K 240K 166960K 729 0
sigio 0 0K 0K 166960K 7 0
proc 72 115K 196K 166960K 635 0
subproc 0 0K 4K 166960K 91 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 64 0
in_multi 11 0K 7K 166960K 150 0
ether_multi 1 0K 0K 166960K 6 0
mrt 0 0K 0K 166960K 4 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 103 466K 466K 166960K 103 0
exec 0 0K 1K 166960K 501 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 132 92K 181K 166960K 8165 0
UVM aobj 17 2K 2K 166960K 18 0
pinsyscall 30 60K 105K 166960K 1907 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 29 0
NDP 4 0K 2K 166960K 55 0
temp 36 8652K 8719K 166960K 35400 0
kqueue 13 20K 30K 166960K 129 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 96 0 93 1 0 1 1 0 8 0
rtentry 176 131 0 118 5 0 5 5 0 8 3
unpcb 144 543 0 526 6 0 6 6 0 8 5
syncache 336 6 0 6 1 1 0 1 0 8 0
tcpcb 736 135 0 131 2 0 2 2 0 8 1
arp 136 14 0 11 1 0 1 1 0 8 0
inpcb 328 640 0 633 4 0 4 4 0 8 3
nd6 152 24 0 24 1 0 1 1 0 8 1
pkpcb 40 4 0 4 2 2 0 1 0 8 0
kcovpl 48 10 0 10 1 0 1 1 0 8 1
ppxss 1192 65 0 65 1 0 1 1 0 8 1
pppxif 1504 2 0 2 1 0 1 1 0 8 1
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 3 0 0 1 0 1 1 0 482 0
pffrnode 88 2 0 0 1 0 1 1 0 8 0
pffrent 40 4 0 1 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfanchor 1288 5 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 46 0 13 1 0 1 1 0 8 0
pfstkey 128 48 0 15 2 0 2 2 0 8 0
pfstate 384 46 0 14 4 0 4 4 0 8 0
pfrule 1344 25 0 19 2 1 1 2 0 8 0
rttmr 136 1 0 1 1 1 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 607 0 473 30 5 25 30 0 8 10
art_table 40 610 0 473 5 0 5 5 0 8 0
art_node 32 130 0 114 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 4 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 20 0 7 1 0 1 1 0 8 0
shmpl 112 15 0 1 1 0 1 1 0 8 0
dirhash 1024 25 0 8 3 0 3 3 0 8 0
dino2pl 256 2587 0 1075 96 0 96 96 0 8 0
ffsino 296 2624 0 1112 118 0 118 118 0 8 0
nchpl 144 3475 0 1780 64 0 64 64 0 8 0
rtmask 32 8 0 8 1 0 1 1 0 8 1
vnodes 216 3109 0 0 173 0 173 173 0 8 0
namei 1024 12190 0 12189 3 2 1 2 0 8 0
percpumem 16 119 0 78 1 0 1 1 0 8 0
kstatmem 264 72 0 62 3 0 3 3 0 8 2
scxspl 216 19657 0 19657 9 7 2 8 1 8 2
plimitpl 152 222 0 207 1 0 1 1 0 8 0
sigapl 424 1057 0 1011 8 1 7 7 0 8 1
knotepl 120 522 0 0 16 0 16 16 0 8 0
kqueuepl 224 261 0 252 2 1 1 2 0 8 0
pipepl 344 311 0 281 6 1 5 6 0 8 1
fdescpl 528 979 0 960 3 0 3 3 0 8 1
filepl 160 6133 0 6017 19 4 15 19 0 8 8
lockfpl 104 298 0 296 1 0 1 1 0 8 0
lockfspl 48 131 0 129 1 0 1 1 0 8 0
sessionpl 144 24 0 15 1 0 1 1 0 8 0
pgrppl 48 78 0 61 1 0 1 1 0 8 0
ucredpl 104 783 0 770 1 0 1 1 0 8 0
zombiepl 144 1016 0 1011 1 0 1 1 0 8 0
processpl 1232 1057 0 1011 5 0 5 5 0 8 0
procpl 664 1992 0 1946 7 0 7 7 0 8 1
sosppl 168 1 0 1 1 1 0 1 0 8 0
sockpl 752 1364 0 1337 18 0 18 18 0 8 15
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 115 0 0 15 0 15 15 0 8 0
mcl2k 2048 30 0 0 4 0 4 4 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 230 0 0 15 0 15 15 0 8 0
bufpl 280 8057 0 1914 439 0 439 439 0 8 0
anonpl 32 12363 0 0 101 1 100 100 0 246 0
amapchunkpl 152 27451 0 27251 35 5 30 31 0 158 20
amappl16 200 4111 0 4104 38 28 10 31 0 8 8
amappl15 192 3 0 3 1 1 0 1 0 8 0
amappl14 184 116 0 104 1 0 1 1 0 8 0
amappl13 176 6 0 6 1 1 0 1 0 8 0
amappl12 168 1693 0 1675 4 2 2 3 0 8 0
amappl11 160 96 0 82 1 0 1 1 0 8 0
amappl10 152 8 0 8 1 1 0 1 0 8 0
amappl9 144 248 0 248 1 1 0 1 0 8 0
amappl8 136 24 0 20 1 0 1 1 0 8 0
amappl7 128 111 0 98 1 0 1 1 0 8 0
amappl6 120 200 0 197 1 0 1 1 0 8 0
amappl5 112 141 0 132 1 0 1 1 0 8 0
amappl4 104 299 0 278 1 0 1 1 0 8 0
amappl3 96 4367 0 4323 3 0 3 3 0 8 0
amappl2 88 1211 0 1147 2 0 2 2 0 8 0
amappl1 80 10677 0 10148 15 2 13 15 0 8 0
amappl 88 7313 0 7245 5 0 5 5 0 92 1
uvmvnodes 80 3109 0 0 64 0 64 64 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 17 0 1 1 0 1 1 0 8 0
uaddrrnd 24 979 0 960 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 979 0 960 1 0 1 1 0 8 0
vmmpekpl 168 9851 0 9813 3 0 3 3 0 8 0
vmmpepl 168 68882 0 67492 117 4 113 114 0 357 32
vmsppl 488 978 0 960 7 2 5 5 0 8 2
rwobjpl 80 23929 0 20099 87 0 87 87 0 8 0
pdppl 4096 1966 0 1920 102 46 56 86 0 8 10
pvpl 32 19467 0 0 158 1 157 157 0 265 0
pmappl 256 978 0 960 3 0 3 3 0 8 1
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 285 0 56 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8380cff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83921a30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83921a30) at __mp_lock+0x192 sys/kern/kern_lock.c:165
syscall(ffff80002a30c5b0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a30c5b0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x752cd9d09130, count: 9
ddb{0}> trace
x86_ipi_db(ffffffff8380cff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83921a30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83921a30) at __mp_lock+0x192 sys/kern/kern_lock.c:165
syscall(ffff80002a30c5b0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a30c5b0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x752cd9d09130, count: -6
ddb{0}> machine ddbcpu 1
Stopped at ffs_nodealloccg+0x13c: movl 0x4(%rbx),%r15d
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c sys/ufs/ffs/ffs_alloc.c:1106
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:824 [inline]
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 sys/ufs/ffs/ffs_alloc.c:390
ufs_mkdir(ffff80002a349d60) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
VOP_MKDIR(fffffd806f11edb0,ffff80002a349ec0,ffff80002a349ef0,ffff80002a349df0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
domkdirat(ffff80003c40b4e0,ffffff9c,788bc45f3530,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3113
syscall(ffff80002a34a070) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a34a070) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x788bc45f34f0, count: 8
ddb{1}> trace
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c sys/ufs/ffs/ffs_alloc.c:1106
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:824 [inline]
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 sys/ufs/ffs/ffs_alloc.c:390
ufs_mkdir(ffff80002a349d60) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
VOP_MKDIR(fffffd806f11edb0,ffff80002a349ec0,ffff80002a349ef0,ffff80002a349df0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
domkdirat(ffff80003c40b4e0,ffffff9c,788bc45f3530,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3113
syscall(ffff80002a34a070) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a34a070) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x788bc45f34f0, count: -7
---
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#syz undup
syzbot found the following issue on:
HEAD commit: bdcea57388aa Move initializaion of UVM vnode descriptors i..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14edbce2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=546e2cd879b0f7313b6d
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3cb68eb6a891/disk-bdcea573.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/0ef4565bb902/bsd-bdcea573.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/fb5bf3115915/kernel-bdcea573.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+546e2c...@syzkaller.appspotmail.com
uvm_fault(0xffffffff838e9870, 0xffff800027c92004, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at ffs_nodealloccg+0x13c: movl 0x4(%rbx),%r15d
TID PID UID PRFLAGS PFLAGS CPU COMMAND
284556 57587 0 0 0 0 syz-executor
*165473 79710 0 0x2 0 1K syz-executor
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c sys/ufs/ffs/ffs_alloc.c:1106
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:824 [inline]
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 sys/ufs/ffs/ffs_alloc.c:390
ufs_mkdir(ffff80002a349d60) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
VOP_MKDIR(fffffd806f11edb0,ffff80002a349ec0,ffff80002a349ef0,ffff80002a349df0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
domkdirat(ffff80003c40b4e0,ffffff9c,788bc45f3530,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3113
syscall(ffff80002a34a070) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a34a070) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x788bc45f34f0, count: 8
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xffffffff838e9870, 0xffff800027c92004, 0, 1) -> d
ddb{1}> trace
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c sys/ufs/ffs/ffs_alloc.c:1106
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:824 [inline]
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 sys/ufs/ffs/ffs_alloc.c:390
ufs_mkdir(ffff80002a349d60) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
VOP_MKDIR(fffffd806f11edb0,ffff80002a349ec0,ffff80002a349ef0,ffff80002a349df0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
domkdirat(ffff80003c40b4e0,ffffff9c,788bc45f3530,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3113
syscall(ffff80002a34a070) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a34a070) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x788bc45f34f0, count: -7
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80002a349b10
rbx 0xffff800027c92000
rdx 0
rcx 0xffff80003c40b4e0
rax 0xffff8000299edff0
r8 0xffffffffffffffff
r9 0
r10 0xa7d3a9ef3f953c97
r11 0x44ee13a09188edc3
r12 0xffff800000b50000
r13 0xfffffd805bd66460
r14 0x5
r15 0
rip 0xffffffff81bd50dc ffs_nodealloccg+0x13c
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a349a60
ss 0x10
ffs_nodealloccg+0x13c: movl 0x4(%rbx),%r15d
ddb{1}> show proc
PROC (syz-executor) tid=165473 pid=79710 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=0xffff80003c40a7e8,0xffff80003c40b788
process=0xffff80002a3ceb68 user=0xffff80002a345000, vmspace=0xfffffd800b0273d0
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
57587 284556 40033 0 7 0 syz-executor
*79710 165473 40033 0 7 0x2 syz-executor
64837 29507 40033 0 2 0 syz-executor
1339 492914 0 0 3 0x14200 acct acct
62766 97159 0 0 3 0x14280 nfsidl nfsio
31275 391530 0 0 3 0x14280 nfsidl nfsio
91562 332256 0 0 3 0x14280 nfsidl nfsio
84036 376690 0 0 3 0x14280 nfsidl nfsio
71839 371074 0 0 3 0x14200 bored sosplice
40033 75045 32447 0 2 0x10000002 syz-executor
32447 451096 38136 0 3 0x10008a sigsusp ksh
38136 391398 65417 0 3 0x98 kqread sshd-session
65417 169125 86581 0 3 0x92 kqread sshd-session
61344 387727 1 0 3 0x100083 ttyopn getty
86581 396012 1 0 3 0x88 kqread sshd
91260 188062 71883 74 3 0x1100092 bpf pflogd
71883 494771 1 0 3 0x80 sbwait pflogd
66254 66453 61363 73 3 0x1100090 kqread syslogd
61363 323815 1 0 3 0x100082 sbwait syslogd
84514 110094 1 0 3 0x100080 kqread resolvd
18747 354459 68952 77 3 0x100092 kqread dhcpleased
50820 3820 68952 77 3 0x100092 kqread dhcpleased
68952 7393 1 0 3 0x80 kqread dhcpleased
56653 483770 0 0 3 0x14200 bored smr
45125 299793 0 0 2 0x14200 zerothread
22428 166274 0 0 3 0x14200 aiodoned aiodoned
70957 64851 0 0 3 0x14200 syncer update
7892 252879 0 0 3 0x14200 cleaner cleaner
7327 368440 0 0 3 0x14200 reaper reaper
94078 167291 0 0 3 0x14200 pgdaemon pagedaemon
87050 211177 0 0 3 0x14200 bored viomb
11039 57942 0 0 3 0x40014200 acpi0 acpi0
96983 366943 0 0 3 0x40014200 idle1
55910 218336 0 0 3 0x14200 bored softnet1
28052 154398 0 0 3 0x14200 bored softnet0
65241 447556 0 0 3 0x14200 smrbar systqmp
58152 424972 0 0 3 0x14200 bored systq
23237 291763 0 0 3 0x14200 tmoslp softclockmp
72035 380205 0 0 3 0x40014200 tmoslp softclock
84691 20862 0 0 3 0x40014200 idle0
1 165160 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 79710 (syz-executor) thread 0xffff80003c40b4e0 (165473)
exclusive rrwlock inode r = 0 (0xfffffd806f30fa18)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
#6 namei+0x7ca sys/kern/vfs_lookup.c:250
#7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098
#8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
#9 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83921c38)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
#1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748
#2 Xsyscall+0x128
Process 65241 (systqmp) thread 0xffff8000ffffecf8 (447556)
shared rwlock systqmp r = 0 (0xffffffff837a1ee8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10178 11002K 11472K 166960K 12015 0
pcb 17 13K 20K 166960K 270 0
rtable 67 6K 10K 166960K 376 0
pf 19 15K 30K 166960K 133 0
ifaddr 11 1K 8K 166960K 84 0
ifgroup 22 1K 2K 166960K 113 0
sysctl 3 1K 9K 166960K 14 0
counters 52 34K 38K 166960K 208 0
ioctlops 0 0K 4K 166960K 1608 0
iov 0 0K 20K 166960K 98 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1456 92K 92K 166960K 1998 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 11 0
VM map 2 1K 1K 166960K 2 0
sem 15 1K 1K 166960K 27 0
dirhash 12 2K 2K 166960K 24 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 5 4K 240K 166960K 729 0
sigio 0 0K 0K 166960K 7 0
proc 72 115K 196K 166960K 635 0
subproc 0 0K 4K 166960K 91 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 64 0
in_multi 11 0K 7K 166960K 150 0
ether_multi 1 0K 0K 166960K 6 0
mrt 0 0K 0K 166960K 4 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 103 466K 466K 166960K 103 0
exec 0 0K 1K 166960K 501 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 132 92K 181K 166960K 8165 0
UVM aobj 17 2K 2K 166960K 18 0
pinsyscall 30 60K 105K 166960K 1907 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 29 0
NDP 4 0K 2K 166960K 55 0
temp 36 8652K 8719K 166960K 35400 0
kqueue 13 20K 30K 166960K 129 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 96 0 93 1 0 1 1 0 8 0
rtentry 176 131 0 118 5 0 5 5 0 8 3
unpcb 144 543 0 526 6 0 6 6 0 8 5
syncache 336 6 0 6 1 1 0 1 0 8 0
tcpcb 736 135 0 131 2 0 2 2 0 8 1
arp 136 14 0 11 1 0 1 1 0 8 0
inpcb 328 640 0 633 4 0 4 4 0 8 3
nd6 152 24 0 24 1 0 1 1 0 8 1
pkpcb 40 4 0 4 2 2 0 1 0 8 0
kcovpl 48 10 0 10 1 0 1 1 0 8 1
ppxss 1192 65 0 65 1 0 1 1 0 8 1
pppxif 1504 2 0 2 1 0 1 1 0 8 1
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 3 0 0 1 0 1 1 0 482 0
pffrnode 88 2 0 0 1 0 1 1 0 8 0
pffrent 40 4 0 1 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfanchor 1288 5 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 46 0 13 1 0 1 1 0 8 0
pfstkey 128 48 0 15 2 0 2 2 0 8 0
pfstate 384 46 0 14 4 0 4 4 0 8 0
pfrule 1344 25 0 19 2 1 1 2 0 8 0
rttmr 136 1 0 1 1 1 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 607 0 473 30 5 25 30 0 8 10
art_table 40 610 0 473 5 0 5 5 0 8 0
art_node 32 130 0 114 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 4 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 20 0 7 1 0 1 1 0 8 0
shmpl 112 15 0 1 1 0 1 1 0 8 0
dirhash 1024 25 0 8 3 0 3 3 0 8 0
dino2pl 256 2587 0 1075 96 0 96 96 0 8 0
ffsino 296 2624 0 1112 118 0 118 118 0 8 0
nchpl 144 3475 0 1780 64 0 64 64 0 8 0
rtmask 32 8 0 8 1 0 1 1 0 8 1
vnodes 216 3109 0 0 173 0 173 173 0 8 0
namei 1024 12190 0 12189 3 2 1 2 0 8 0
percpumem 16 119 0 78 1 0 1 1 0 8 0
kstatmem 264 72 0 62 3 0 3 3 0 8 2
scxspl 216 19657 0 19657 9 7 2 8 1 8 2
plimitpl 152 222 0 207 1 0 1 1 0 8 0
sigapl 424 1057 0 1011 8 1 7 7 0 8 1
knotepl 120 522 0 0 16 0 16 16 0 8 0
kqueuepl 224 261 0 252 2 1 1 2 0 8 0
pipepl 344 311 0 281 6 1 5 6 0 8 1
fdescpl 528 979 0 960 3 0 3 3 0 8 1
filepl 160 6133 0 6017 19 4 15 19 0 8 8
lockfpl 104 298 0 296 1 0 1 1 0 8 0
lockfspl 48 131 0 129 1 0 1 1 0 8 0
sessionpl 144 24 0 15 1 0 1 1 0 8 0
pgrppl 48 78 0 61 1 0 1 1 0 8 0
ucredpl 104 783 0 770 1 0 1 1 0 8 0
zombiepl 144 1016 0 1011 1 0 1 1 0 8 0
processpl 1232 1057 0 1011 5 0 5 5 0 8 0
procpl 664 1992 0 1946 7 0 7 7 0 8 1
sosppl 168 1 0 1 1 1 0 1 0 8 0
sockpl 752 1364 0 1337 18 0 18 18 0 8 15
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 115 0 0 15 0 15 15 0 8 0
mcl2k 2048 30 0 0 4 0 4 4 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 230 0 0 15 0 15 15 0 8 0
bufpl 280 8057 0 1914 439 0 439 439 0 8 0
anonpl 32 12363 0 0 101 1 100 100 0 246 0
amapchunkpl 152 27451 0 27251 35 5 30 31 0 158 20
amappl16 200 4111 0 4104 38 28 10 31 0 8 8
amappl15 192 3 0 3 1 1 0 1 0 8 0
amappl14 184 116 0 104 1 0 1 1 0 8 0
amappl13 176 6 0 6 1 1 0 1 0 8 0
amappl12 168 1693 0 1675 4 2 2 3 0 8 0
amappl11 160 96 0 82 1 0 1 1 0 8 0
amappl10 152 8 0 8 1 1 0 1 0 8 0
amappl9 144 248 0 248 1 1 0 1 0 8 0
amappl8 136 24 0 20 1 0 1 1 0 8 0
amappl7 128 111 0 98 1 0 1 1 0 8 0
amappl6 120 200 0 197 1 0 1 1 0 8 0
amappl5 112 141 0 132 1 0 1 1 0 8 0
amappl4 104 299 0 278 1 0 1 1 0 8 0
amappl3 96 4367 0 4323 3 0 3 3 0 8 0
amappl2 88 1211 0 1147 2 0 2 2 0 8 0
amappl1 80 10677 0 10148 15 2 13 15 0 8 0
amappl 88 7313 0 7245 5 0 5 5 0 92 1
uvmvnodes 80 3109 0 0 64 0 64 64 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 17 0 1 1 0 1 1 0 8 0
uaddrrnd 24 979 0 960 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 979 0 960 1 0 1 1 0 8 0
vmmpekpl 168 9851 0 9813 3 0 3 3 0 8 0
vmmpepl 168 68882 0 67492 117 4 113 114 0 357 32
vmsppl 488 978 0 960 7 2 5 5 0 8 2
rwobjpl 80 23929 0 20099 87 0 87 87 0 8 0
pdppl 4096 1966 0 1920 102 46 56 86 0 8 10
pvpl 32 19467 0 0 158 1 157 157 0 265 0
pmappl 256 978 0 960 3 0 3 3 0 8 1
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 285 0 56 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8380cff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83921a30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83921a30) at __mp_lock+0x192 sys/kern/kern_lock.c:165
syscall(ffff80002a30c5b0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a30c5b0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x752cd9d09130, count: 9
ddb{0}> trace
x86_ipi_db(ffffffff8380cff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83921a30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83921a30) at __mp_lock+0x192 sys/kern/kern_lock.c:165
syscall(ffff80002a30c5b0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a30c5b0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x752cd9d09130, count: -6
ddb{0}> machine ddbcpu 1
Stopped at ffs_nodealloccg+0x13c: movl 0x4(%rbx),%r15d
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c sys/ufs/ffs/ffs_alloc.c:1106
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:824 [inline]
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 sys/ufs/ffs/ffs_alloc.c:390
ufs_mkdir(ffff80002a349d60) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
VOP_MKDIR(fffffd806f11edb0,ffff80002a349ec0,ffff80002a349ef0,ffff80002a349df0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
domkdirat(ffff80003c40b4e0,ffffff9c,788bc45f3530,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3113
syscall(ffff80002a34a070) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a34a070) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x788bc45f34f0, count: 8
ddb{1}> trace
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_nodealloccg(fffffd806f30f978,5,0,41c0) at ffs_nodealloccg+0x13c sys/ufs/ffs/ffs_alloc.c:1106
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:824 [inline]
ffs_inode_alloc(fffffd806f30f978,41c0,fffffd80097fb8f0,ffff80002a349cf8) at ffs_inode_alloc+0x345 sys/ufs/ffs/ffs_alloc.c:390
ufs_mkdir(ffff80002a349d60) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
VOP_MKDIR(fffffd806f11edb0,ffff80002a349ec0,ffff80002a349ef0,ffff80002a349df0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
domkdirat(ffff80003c40b4e0,ffffff9c,788bc45f3530,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3113
syscall(ffff80002a34a070) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a34a070) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x788bc45f34f0, count: -7
---
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