staging: rtl8712: Fix a possible NULL pointer dereference in function r8712_joinbss_e...

GCC 10 analyzer reports a warning: dereference of NULL
The function r8712_find_network can return NULL and is usually checked but
no check is present is this case.
Fix by adding the check.

Signed-off-by: Lee Gibson <leegib@gmail.com>
Link: https://lore.kernel.org/r/20210319085836.8259-1-leegib@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/rtl8712/rtl871x_mlme.c b/drivers/staging/rtl8712/rtl871x_mlme.c
index 6074383ec0b508279340803f86467699f763119e..f5886b39b3b5007d56b969402e1cc976f64adf51 100644 (file)
--- a/drivers/staging/rtl8712/rtl871x_mlme.c
+++ b/drivers/staging/rtl8712/rtl871x_mlme.c
@@ -728,7 +728,8 @@ void r8712_joinbss_event_callback(struct _adapter *adapter, u8 *pbuf)
                                             r8712_find_network(&pmlmepriv->
                                             scanned_queue,
                                             cur_network->network.MacAddress);
-                                       pcur_wlan->fixed = false;
+                                       if (pcur_wlan)
+                                               pcur_wlan->fixed = false;
 
                                        pcur_sta = r8712_get_stainfo(pstapriv,
                                             cur_network->network.MacAddress);