segfault in wpa_ctrl_request

[marc miller]

Jouni,

There are two threads in this process. Should i serialize access to
wpa_ctrl_request() ?

Every time i make the call to that function i open and close the ctrl
interface (wpa_ctrl_open ), i can probably use a mutex alongside it.
Any chances that can help ?


On Fri, Jan 15, 2016 at 12:52 PM, Jouni Malinen <j at w1.fi> wrote:
> On Thu, Jan 14, 2016 at 11:28:40AM -0500, marc miller wrote:
>> I am using wpa_supplicant to control wifi on one of my arm based
>> platforms. I'm using 2.2 . I see sometimes that my process segfaults
>> and backtrace points it to wpa_ctrl_request.
>>
>> In the latest instance , i saw it point to wpa_ctrl.c:521 -->
>> "
>>         if (FD_ISSET(ctrl->s, &rfds)) {
>> "
>>
>> This happened when my process tried to do this:
>>       if (wpa_ctrl_request(g_ctrl_conn,"DISCONNECT",10,buf,&len,NULL) < 0)
>
> Is there any chance of this process using multiple threads and another
> thread closing the control socket while this command is still executing?
> That's one case I remember someone being able to hit a crash in
> wpa_ctrl.c.
>
> --
> Jouni Malinen                                            PGP id EFC895FA