[wfd-plugin]: Add NULL check to avoid potential crash.

Description: This patch adds validation check in following
function.
1. ws_create_group()

Change-Id: Iaa1077ad04e6ae547ab62b53744760a8142eb55f
Signed-off-by: Maneesh Jain <maneesh.jain@samsung.com>

diff --git a/plugin/wpasupplicant/ctrl_iface_dbus/wfd-plugin-wpasupplicant.c b/plugin/wpasupplicant/ctrl_iface_dbus/wfd-plugin-wpasupplicant.c
index aaea069..da845b1 100755 (executable)
--- a/plugin/wpasupplicant/ctrl_iface_dbus/wfd-plugin-wpasupplicant.c
+++ b/plugin/wpasupplicant/ctrl_iface_dbus/wfd-plugin-wpasupplicant.c
@@ -3167,17 +3167,20 @@ int ws_prov_disc_req(unsigned char *peer_addr, wfd_oem_wps_mode_e wps_mode, int
 
        if (!peer_addr) {
                WDP_LOGE("Invalid parameter");
+               __WDP_LOG_FUNC_EXIT__;
                return -1;
        }
 
        if (!g_pd) {
                WDP_LOGE("ws_dbus_plugin_data_s is not created yet");
+               __WDP_LOG_FUNC_EXIT__;
                return -1;
        }
 
        g_dbus = g_pd->g_dbus;
        if (!g_dbus) {
                WDP_LOGE("DBus connection is NULL");
+               __WDP_LOG_FUNC_EXIT__;
                return -1;
        }
        memset(&params, 0x0, sizeof(dbus_method_param_s));
@@ -3217,17 +3220,20 @@ int ws_connect(unsigned char *peer_addr, wfd_oem_conn_param_s *param)
 
        if (!peer_addr || !param) {
                WDP_LOGE("Invalid parameter");
+               __WDP_LOG_FUNC_EXIT__;
                return -1;
        }
 
        if (!g_pd) {
                WDP_LOGE("ws_dbus_plugin_data_s is not created yet");
+               __WDP_LOG_FUNC_EXIT__;
                return -1;
        }
 
        g_dbus = g_pd->g_dbus;
        if (!g_dbus) {
                WDP_LOGE("DBus connection is NULL");
+               __WDP_LOG_FUNC_EXIT__;
                return -1;
        }
        memset(&params, 0x0, sizeof(dbus_method_param_s));
@@ -3488,14 +3494,22 @@ int ws_create_group(wfd_oem_group_param_s *param)
        char persistent_group_obj_path[OBJECT_PATH_MAX] = {0,};
        int res = 0;
 
+       if (!param) {
+               WDP_LOGE("Invalid parameter");
+               __WDP_LOG_FUNC_EXIT__;
+               return -1;
+       }
+
        if (!g_pd) {
                WDP_LOGE("ws_dbus_plugin_data_s is not created yet");
+               __WDP_LOG_FUNC_EXIT__;
                return -1;
        }
 
        g_dbus = g_pd->g_dbus;
        if (!g_dbus) {
                WDP_LOGE("DBus connection is NULL");
+               __WDP_LOG_FUNC_EXIT__;
                return -1;
        }
        memset(&params, 0x0, sizeof(dbus_method_param_s));