wpas_p2p_group_delete: Removing STA connection in case of group formation failure

Krishna Chaitanya chaitanya.mgit at gmail.com
Tue Jun 16 10:38:02 EDT 2015

On Tue, Jun 16, 2015 at 2:31 AM, Jouni Malinen <j at w1.fi> wrote:
> On Mon, Jun 15, 2015 at 09:41:18PM +0300, Jouni Malinen wrote:
>> Thanks. I was able to reproduce this by forcing interface UP failing for
>> the group interface. It looks like some of the calls in at least one of
>> the error paths end up getting going through both p2p-wlan0-# and wlan0
>> interface when handling this type of failure case. The pending
>> p2p-wlan0-# instance gets removed properly, but wlan0 instance should
>> not have tried to remove the pending P2P group since it was not on that
>> instance in the first place. I'll figure out how to fix this.
> Looks like the main issue here is in the error path in
> wpas_go_neg_completed() where wpas_p2p_group_formation_failed() gets
> called after the group interface addition failed. This resulted in
> wpas_group_formation_completed(failure) calling wpas_p2p_group_delete()
> for incorrect interface in this separate P2P group interface case.
> It looks like the simplest way to fix this is by skipping the
> wpas_p2p_group_delete() call in this special case. This commit does
> that:
> http://w1.fi/cgit/hostap/commit/?id=d95c5994c8038cb09a70cc6400584c82097e7c31
With this commit we have run some tests and confirmed that the issue
is resolved.
Thanks a lot.

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