qcacld-3.0: Add NULL pointer check

NULL check validation before using "add_ie" pointer
to avoid unexpected behavior.

Change-Id: I4dc81d454a23bf4f995d62879e7fff8b7d409136
CRs-Fixed: 3316818

core/mac/src/pe/lim/lim_send_management_frames.c

@@ -2883,7 +2883,8 @@ lim_send_assoc_req_mgmt_frame(struct mac_context *mac_ctx,
 		rsnx_ie_len = rsnx_ie[1] + 2;
 	}
 	/* MSCS ext ie */
-	if (wlan_get_ext_ie_ptr_from_ext_id(MSCS_OUI_TYPE, MSCS_OUI_SIZE,
+	if (add_ie &&
+	    wlan_get_ext_ie_ptr_from_ext_id(MSCS_OUI_TYPE, MSCS_OUI_SIZE,
 					    add_ie, add_ie_len)) {
 		mscs_ext_ie = qdf_mem_malloc(WLAN_MAX_IE_LEN + 2);
 		if (!mscs_ext_ie)
@@ -2908,8 +2909,10 @@ lim_send_assoc_req_mgmt_frame(struct mac_context *mac_ctx,
 	 * TLVs with same attribute in a single IE.
 	 * Strip off the MBO IE from add_ie and append it at the end.
 	 */
-	if (wlan_get_vendor_ie_ptr_from_oui(SIR_MAC_MBO_OUI,
-	    SIR_MAC_MBO_OUI_SIZE, add_ie, add_ie_len)) {
+	if (add_ie &&
+	    wlan_get_vendor_ie_ptr_from_oui(SIR_MAC_MBO_OUI,
+					    SIR_MAC_MBO_OUI_SIZE, add_ie,
+					    add_ie_len)) {
 		mbo_ie = qdf_mem_malloc(DOT11F_IE_MBO_IE_MAX_LEN + 2);
 		if (!mbo_ie)
 			goto end;
@@ -2947,7 +2950,8 @@ lim_send_assoc_req_mgmt_frame(struct mac_context *mac_ctx,
 	 * Append the IEs just before MBO IEs as MBO IEs have to be at the
 	 * end of the frame.
 	 */
-	if (wlan_get_ie_ptr_from_eid(WLAN_ELEMID_VENDOR, add_ie, add_ie_len)) {
+	if (add_ie &&
+	    wlan_get_ie_ptr_from_eid(WLAN_ELEMID_VENDOR, add_ie, add_ie_len)) {
 		vendor_ies = qdf_mem_malloc(MAX_VENDOR_IES_LEN + 2);
 		if (vendor_ies) {
 			current_len = add_ie_len;