[PATCH] P2P: add missing NULL check in p2p_ctrl_flush()

[Dan Callaghan]

When wpa_supplicant is compiled with CONFIG_TESTING_OPTIONS and receives
a FLUSH command from wpa_cli, p2p_ctrl_flush() may crash due to passing
a NULL pointer into p2p_set_invitation_op_freq().

Add a NULL pointer check, similar to the other NULL pointer check
already in p2p_ctrl_flush().

Fixes: 475f50d71001 ("P2P2: Allow op class and channel override for Invitation Response")
Signed-off-by: Dan Callaghan <dan.callaghan at morsemicro.com>
---
 wpa_supplicant/ctrl_iface.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wpa_supplicant/ctrl_iface.c b/wpa_supplicant/ctrl_iface.c
index 050ed1624..ea7c8785b 100644
--- a/wpa_supplicant/ctrl_iface.c
+++ b/wpa_supplicant/ctrl_iface.c
@@ -7907,7 +7907,8 @@ static void p2p_ctrl_flush(struct wpa_supplicant *wpa_s)
 #ifdef CONFIG_TESTING_OPTIONS
 	os_free(wpa_s->get_pref_freq_list_override);
 	wpa_s->get_pref_freq_list_override = NULL;
-	p2p_set_invitation_op_freq(wpa_s->global->p2p, -1);
+	if (wpa_s->global->p2p)
+		p2p_set_invitation_op_freq(wpa_s->global->p2p, -1);
 #endif /* CONFIG_TESTING_OPTIONS */
 
 	wpas_p2p_stop_find(wpa_s);
-- 
2.50.1