[PATCH] radius: sanity check for null pointer segfault

[Eduardo Abinader]

I just reproduced:

log file: http://pastebin.com/qbpFYWQV
conf: http://pastebin.com/sGYNm2T5

On Thu, Aug 18, 2016 at 7:14 PM, Jouni Malinen <j at w1.fi> wrote:
> On Thu, Aug 18, 2016 at 09:57:47AM +0200, Eduardo Abinader wrote:
>> I can provide logs later, but summarizing:
>>
>> 1) compiled with this defconfig: http://pastebin.com/7v5Zh4Ba
>>
>> 2) started a bss with no radius, just normal WPA-PSK
>>
>> 3) sent ctrl_iface mib command
>>
>> result: crash.
>
> There is actually already a hwsim test case that does this with
> WPA-PSK.. In addition, I just tried this with a defconfig build and the
> following hostapd.conf file without being able to reproduce.
>
> interface=wlan0
> driver=nl80211
> hw_mode=g
> channel=1
> ctrl_interface=/var/run/hostapd
> ctrl_interface_group=adm
> ssid=test-psk
> wpa=2
> wpa_key_mgmt=WPA-PSK
> wpa_pairwise=CCMP
> wpa_passphrase=12345678
>
> --
> Jouni Malinen                                            PGP id EFC895FA