uvm_fault(0xffffffff829fcb88, 0x10, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*164865 37939 0 0x14000 0x200 0K softnet
nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265
nd6_ns_input(fffffd8063fd4800,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline]
nd6_ns_input(fffffd8063fd4800,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301
icmp6_input(ffff800021166de8,ffff800021166df4,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686
ip_deliver(ffff800021166de8,ffff800021166df4,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658
ip6_input_if(ffff800021166de8,ffff800021166df4,29,0,ffff8000006ae000) at ip6_input_if+0x978
ipv6_input(ffff8000006ae000,fffffd806657ef00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171
if_input_local(ffff8000006ae000,fffffd806657ef00,18) at if_input_local+0x136 sys/net/if.c:778
loinput(ffff8000006ae000,fffffd806657ef00) at loinput+0x4d sys/net/if_loop.c:238
if_input_process(ffff8000006ae000,ffff800021166f28) at if_input_process+0xd2 sys/net/if.c:843
ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773
taskq_thread(ffff80000002c000) at taskq_thread+0xe6 sys/kern/kern_task.c:449
end trace frame: 0x0, count: 4
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: uvm_fault(0xffffffff829fcb88, 0x10, 0, 1) -> e
ddb{0}> trace
nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265
nd6_ns_input(fffffd8063fd4800,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline]
nd6_ns_input(fffffd8063fd4800,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301
icmp6_input(ffff800021166de8,ffff800021166df4,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686
ip_deliver(ffff800021166de8,ffff800021166df4,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658
ip6_input_if(ffff800021166de8,ffff800021166df4,29,0,ffff8000006ae000) at ip6_input_if+0x978
ipv6_input(ffff8000006ae000,fffffd806657ef00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171
if_input_local(ffff8000006ae000,fffffd806657ef00,18) at if_input_local+0x136 sys/net/if.c:778
loinput(ffff8000006ae000,fffffd806657ef00) at loinput+0x4d sys/net/if_loop.c:238
if_input_process(ffff8000006ae000,ffff800021166f28) at if_input_process+0xd2 sys/net/if.c:843
ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773
taskq_thread(ffff80000002c000) at taskq_thread+0xe6 sys/kern/kern_task.c:449
end trace frame: 0x0, count: -11
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800021166980
rbx 0
rdx 0
rcx 0x7
rax 0xffff800021148540
r8 0xffffffff81188f6c nd6_ns_input+0x3bc
r9 0x1
r10 0xcec3cda40b23f942
r11 0x66d59a43dfc3e71f
r12 0
r13 0x2
r14 0
r15 0xffff800000e9c100
rip 0xffffffff8118b798 nd6_dad_duplicated+0x28
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800021166900
ss 0x10
nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13
ddb{0}> show proc
PROC (softnet) pid=164865 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=32, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800021148000,0xffff8000211487f0
process=0xffff8000ffffcc78 user=0xffff800021162000, vmspace=0xffffffff829fcb88
estcpu=0, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
69050 215549 58263 0 2 0 syz-executor.1
69050 457623 58263 0 2 0x4000000 syz-executor.1
27363 469672 87789 0 3 0x82 nanoslp syz-executor.0
58263 291339 87789 0 3 0x82 nanoslp syz-executor.1
33247 95645 0 0 3 0x14280 nfsidl nfsio
83922 384824 0 0 3 0x14280 nfsidl nfsio
64460 426477 0 0 3 0x14280 nfsidl nfsio
68807 436836 0 0 3 0x14280 nfsidl nfsio
51624 503341 0 0 3 0x14280 nfsidl nfsio
89812 21050 0 0 3 0x14280 nfsidl nfsio
82467 63265 0 0 3 0x14280 nfsidl nfsio
73081 407369 0 0 3 0x14280 nfsidl nfsio
61234 79581 0 0 3 0x14280 nfsidl nfsio
70591 179726 0 0 3 0x14280 nfsidl nfsio
53747 407958 0 0 3 0x14280 nfsidl nfsio
79575 367542 0 0 3 0x14280 nfsidl nfsio
56428 454251 0 0 3 0x14280 nfsidl nfsio
62798 433550 0 0 3 0x14280 nfsidl nfsio
61338 182261 0 0 3 0x14280 nfsidl nfsio
79470 443147 0 0 3 0x14280 nfsidl nfsio
78599 456511 0 0 3 0x14280 nfsidl nfsio
16284 201290 0 0 3 0x14280 nfsidl nfsio
175 170584 0 0 3 0x14280 nfsidl nfsio
4323 231923 0 0 3 0x14280 nfsidl nfsio
96270 334393 0 0 3 0x14200 acct acct
29066 334007 1 0 3 0x100083 ttyin getty
32442 12461 0 0 3 0x14200 bored sosplice
87789 273102 62586 0 3 0x82 thrsleep syz-fuzzer
87789 290225 62586 0 3 0x4000082 thrsleep syz-fuzzer
87789 62777 62586 0 3 0x4000082 thrsleep syz-fuzzer
87789 502841 62586 0 3 0x4000082 thrsleep syz-fuzzer
87789 272855 62586 0 3 0x4000082 thrsleep syz-fuzzer
87789 423000 62586 0 3 0x4000082 thrsleep syz-fuzzer
87789 405260 62586 0 3 0x4000082 thrsleep syz-fuzzer
87789 486887 62586 0 3 0x4000082 kqread syz-fuzzer
62586 498753 20060 0 3 0x10008a sigsusp ksh
20060 505570 81359 0 3 0x9a kqread sshd
81359 411787 1 0 3 0x88 kqread sshd
66562 297190 63670 74 3 0x100092 bpf pflogd
63670 325964 1 0 3 0x80 netio pflogd
29785 441955 90464 73 3 0x100090 kqread syslogd
90464 237225 1 0 3 0x100082 netio syslogd
75258 347237 1 0 3 0x100080 kqread resolvd
36932 484279 23349 77 3 0x100092 kqread dhcpleased
71650 321794 23349 77 3 0x100092 kqread dhcpleased
23349 17508 1 0 3 0x80 kqread dhcpleased
39043 329685 0 0 3 0x14200 bored smr
75574 483157 0 0 2 0x14200 zerothread
23740 420014 0 0 3 0x14200 aiodoned aiodoned
19862 27609 0 0 3 0x14200 syncer update
15992 418971 0 0 3 0x14200 cleaner cleaner
30635 411552 0 0 3 0x14200 reaper reaper
36379 476545 0 0 3 0x14200 pgdaemon pagedaemon
48528 465127 0 0 3 0x14200 bored viomb
82504 168966 0 0 3 0x40014200 acpi0 acpi0
57831 135371 0 0 7 0x40014200 idle1
*37939 164865 0 0 7 0x14200 softnet
42642 108529 0 0 2 0x14200 systqmp
34199 179529 0 0 3 0x14200 bored systq
75410 30051 0 0 3 0x40014200 bored softclock
2839 4423 0 0 3 0x40014200 idle0
1 62978 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 37939 (softnet) thread 0xffff800021148540 (164865)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82983db8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 kpageflttrap+0x229 sys/arch/amd64/amd64/trap.c:274
#2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318
#3 alltraps_kern_meltdown+0x7b
#4 nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265
#5 nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline]
#5 nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301
#6 icmp6_input+0xabe sys/netinet6/icmp6.c:686
#7 ip_deliver+0x322 sys/netinet/ip_input.c:658
#8 ip6_input_if+0x978
#9 ipv6_input+0x48 sys/netinet6/ip6_input.c:171
#10 if_input_local+0x136 sys/net/if.c:778
#11 loinput+0x4d sys/net/if_loop.c:238
#12 if_input_process+0xd2 sys/net/if.c:843
#13 ifiq_process+0x80 sys/net/ifq.c:773
#14 taskq_thread+0xe6 sys/kern/kern_task.c:449
#15 proc_trampoline+0x1c
exclusive rwlock netlock r = 0 (0xffffffff827f2760)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 if_input_process+0xa1 sys/net/if.c:843
#2 ifiq_process+0x80 sys/net/ifq.c:773
#3 taskq_thread+0xe6 sys/kern/kern_task.c:449
#4 proc_trampoline+0x1c
shared rwlock softnet r = 0 (0xffff80000002c070)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 taskq_thread+0xcb sys/kern/kern_task.c:445
#2 proc_trampoline+0x1c
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10164 6543K 7354K 78643K 85339 0
pcb 14 24K 27K 78643K 7333 0
rtable 129 27K 28K 78643K 9737 0
ifaddr 68 28K 38K 78643K 3905 0
sysctl 3 1K 3K 78643K 12 0
counters 42 33K 34K 78643K 1422 0
ioctlops 0 0K 4K 78643K 10950 0
iov 0 0K 24K 78643K 3610 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1599 100K 101K 78643K 26483 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 1408 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 12062 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 5 13K 25K 78643K 45603 0
sigio 0 0K 0K 78643K 436 0
proc 72 87K 99K 78643K 4604 0
subproc 26 1K 2K 78643K 1185 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 2629 0
in_multi 18 1K 2K 78643K 4688 0
ether_multi 1 0K 0K 78643K 851 0
mrt 1 0K 0K 78643K 267 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 247 1102K 1102K 78643K 247 0
exec 0 0K 2K 78643K 7931 0
pfkey data 0 0K 1K 78643K 28 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 628 1763K 2659K 78643K 566019 0
UVM aobj 131 9K 9K 78643K 131 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 3441 0
NDP 6 0K 0K 78643K 1221 0
temp 102 4238K 4320K 78643K 379298 0
kqueue 14 22K 30K 78643K 1906 0
SYN cache 2 8K 16K 78643K 3 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 3483 0 3480 55 54 1 5 0 8 0
rtentry 112 2702 0 2684 2 0 2 2 0 8 0
unpcb 128 25130 0 25115 233 232 1 9 0 8 0
syncache 296 47 0 47 19 19 0 1 0 8 0
tcpqe 32 13 213 13 6 6 0 1 0 8 0
tcpcb 736 20740 0 20732 611 604 7 17 0 8 6
arp 120 230 0 226 1 0 1 1 0 8 0
inpcb 304 54011 0 54000 718 712 6 16 0 8 5
rttmr 72 109 0 109 23 23 0 1 0 8 0
nd6 48 702 0 699 2 1 1 1 0 8 0
pkpcb 40 438 0 438 30 30 0 1 0 8 0
kcovpl 48 90 0 88 1 0 1 1 0 8 0
ppxss 1248 155 0 155 40 40 0 1 0 8 0
pfstscr 40 136 0 136 19 19 0 1 0 8 0
pffrag 232 651 0 649 44 43 1 1 0 482 0
pffrnode 88 651 0 649 44 43 1 1 0 8 0
pffrent 40 5744 0 5742 50 49 1 1 0 8 0
pfosfp 40 1468 0 1043 5 0 5 5 0 8 0
pfosfpen 112 1468 0 752 21 0 21 21 0 8 0
pfrktable 1344 602 0 570 10 7 3 3 0 8 0
pftag 88 22 0 18 1 0 1 1 0 8 0
pfqueue 264 11 0 11 3 3 0 1 0 8 0
pfstitem 24 112 0 110 1 0 1 1 0 8 0
pfstkey 112 357 0 355 1 0 1 1 0 8 0
pfstate 320 232 0 230 3 2 1 3 0 8 0
pfsrctr 152 10 0 10 1 1 0 1 0 8 0
pfrule 1360 2484 0 2303 18 2 16 16 0 8 0
art_heap8 4096 4 0 3 4 3 1 2 0 8 0
art_heap4 256 14662 0 14558 85 75 10 16 0 8 0
art_table 32 14666 0 14561 4 2 2 3 0 8 0
art_node 16 2693 0 2676 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 10 1 0 1 1 0 8 0
semapl 112 12060 0 12050 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 62059 0 60563 98 4 94 94 0 8 0
ffsino 272 62059 0 60563 105 5 100 100 0 8 0
nchpl 144 119990 0 118380 62 2 60 61 0 8 0
uvmvnodes 72 6174 0 0 113 0 113 113 0 8 0
vnodes 224 6174 0 0 364 0 364 364 0 8 0
namei 1024 466653 0 466653 18 17 1 1 0 8 1
percpumem 16 723 0 690 1 0 1 1 0 8 0
vcpupl 2048 346 0 2 43 0 43 43 0 8 0
vmpool 560 514 0 170 25 0 25 25 0 8 0
pfiaddrpl 120 311 0 245 5 3 2 3 0 8 0
scsiplug 72 23 0 23 8 8 0 1 0 8 0
scxspl 216 373976 0 373976 42 41 1 8 0 8 1
plimitpl 152 4436 0 4427 1 0 1 1 0 8 0
sigapl 424 45635 0 45581 12 5 7 7 0 8 0
futexpl 64 446758 0 446758 20 19 1 1 0 8 1
knotepl 112 233 0 0 3 0 3 3 0 8 0
kqueuepl 216 10102 0 10088 229 228 1 8 0 8 0
pipepl 336 10480 0 10470 349 345 4 11 0 8 3
fdescpl 496 45577 0 45559 3 0 3 3 0 8 0
filepl 152 354341 0 354230 573 565 8 15 0 8 3
lockfpl 104 15968 0 15966 34 33 1 4 0 8 0
lockfspl 48 4224 0 4222 1 0 1 1 0 8 0
sessionpl 144 107 0 96 1 0 1 1 0 8 0
pgrppl 48 377 0 366 1 0 1 1 0 8 0
ucredpl 96 45202 0 45184 1 0 1 1 0 8 0
zombiepl 144 45581 0 45580 5 4 1 1 0 8 0
processpl 1064 45635 0 45580 4 0 4 4 0 8 0
procpl 672 120181 0 120118 109 102 7 8 0 8 1
srpgc 96 37 0 37 18 17 1 1 0 8 1
sosppl 168 400 0 400 74 74 0 1 0 8 0
sockpl 480 83298 0 83269 1604 1592 12 34 0 8 8
mcl64k 65536 27 0 0 3 0 3 3 0 8 0
mcl16k 16384 17 0 0 3 0 3 3 0 8 0
mcl12k 12288 25 0 0 2 0 2 2 0 8 0
mcl9k 9216 24 0 0 2 0 2 2 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 51 0 0 5 0 5 5 0 8 0
mcl2k2 2112 7 0 0 1 0 1 1 0 8 0
mcl2k 2048 713 0 0 58 10 48 51 0 8 0
mtagpl 96 2072 0 0 11 6 5 8 0 8 0
mbufpl 256 7241 0 0 323 4 319 319 0 8 0
bufpl 280 78310 0 71995 453 0 453 453 0 8 0
anonpl 24 12974922 0 12953678 712 572 140 161 0 186 0
amapchunkpl 152 2270170 0 2269435 9163 9070 93 4435 0 158 63
amappl16 200 132359 0 131487 547 499 48 59 0 8 0
amappl15 192 7871 0 7866 1 0 1 1 0 8 0
amappl14 184 4647 0 4646 18 17 1 1 0 8 0
amappl13 176 7271 0 7270 1 0 1 1 0 8 0
amappl12 168 9159 0 9154 1 0 1 1 0 8 0
amappl11 160 3775 0 3756 1 0 1 1 0 8 0
amappl10 152 3971 0 3966 1 0 1 1 0 8 0
amappl9 144 6465 0 6458 1 0 1 1 0 8 0
amappl8 136 5725 0 5605 5 0 5 5 0 8 0
amappl7 128 3872 0 3864 1 0 1 1 0 8 0
amappl6 120 6580 0 6566 1 0 1 1 0 8 0
amappl5 112 38539 0 38511 1 0 1 1 0 8 0
amappl4 104 10132 0 10101 1 0 1 1 0 8 0
amappl3 96 16905 0 16877 1 0 1 1 0 8 0
amappl2 88 57703 0 57629 4 2 2 2 0 8 0
amappl1 80 761367 0 760921 17 6 11 13 0 8 0
amappl 88 563120 0 562808 8 0 8 8 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 130 0 0 3 0 3 3 0 8 0
uaddrrnd 24 46091 0 45729 3 0 3 3 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 46091 0 45729 3 0 3 3 0 8 0
vmmpekpl 168 258853 0 258803 3 0 3 3 0 8 0
vmmpepl 168 4087407 0 4084386 1623 1463 160 171 0 357 20
vmsppl 368 46090 0 45729 44 11 33 34 0 8 0
rwobjpl 56 967749 0 965847 139 110 29 31 0 8 0
pdppl 4096 92190 0 91802 497 107 390 392 0 8 2
pvpl 32 21729157 0 21707816 1255 1070 185 245 0 265 0
pmappl 224 46090 0 45729 25 3 22 22 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 2273 0 1189 33 1 32 32 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265
nd6_ns_input(fffffd8063fd4800,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline]
nd6_ns_input(fffffd8063fd4800,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301
icmp6_input(ffff800021166de8,ffff800021166df4,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686
ip_deliver(ffff800021166de8,ffff800021166df4,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658
ip6_input_if(ffff800021166de8,ffff800021166df4,29,0,ffff8000006ae000) at ip6_input_if+0x978
ipv6_input(ffff8000006ae000,fffffd806657ef00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171
if_input_local(ffff8000006ae000,fffffd806657ef00,18) at if_input_local+0x136 sys/net/if.c:778
loinput(ffff8000006ae000,fffffd806657ef00) at loinput+0x4d sys/net/if_loop.c:238
if_input_process(ffff8000006ae000,ffff800021166f28) at if_input_process+0xd2 sys/net/if.c:843
ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773
taskq_thread(ffff80000002c000) at taskq_thread+0xe6 sys/kern/kern_task.c:449
end trace frame: 0x0, count: -11
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: 10