hostapd crash

[andreandrea1 at vodafone.it]

Hello, when I try to connect to hostapd with my android phone, linux crash.
I have a debian testing with hostapd version 0.7.3 and I tried kernel:
3.1.0-1-686-pae from debian repository                  
3.1.0-rc4 compiled by me                  
3.2.0-rc6 compiled by me

My hostap conf file is:
interface=wlan0
bridge=br0
driver=nl80211
auth_algs=1
wpa=0

logger_stdout=-1
logger_stdout_level=2

ssid=prrr
hw_mode=g
channel=6

max_num_sta=5


And my wifi device is a "Atheros AR2427 802.11bg" that use ath9k driver

And I launch this commands for use hostap:
/etc/init.d/network-manager stop
killall dhcpcd
ifconfig eth0 down
ifconfig wlan0 down
echo 1 > /proc/sys/net/ipv4/ip_forward
brctl addbr br0
brctl addif br0 eth0
brctl setfd br0 0
hostapd -dd /etc/hostapd/hostapd.conf
ifconfig eth0 up
ifconfig br0 192.168.3.9 up
dhcpd br0
 
Unfortunatly I can't get the log

Thanks
Andrea