qcacld-3.0: Update erp seq num only for FILS connection

During roaming, the firmware updates the host driver without
the next erp sequence number. Currently the host driver updates
the erp sequence number in roam info without checking if the
connection is FILS connection. This results in potential NULL
pointer dereference in case of non FILS connection.

Add check to see if session->pCurRoamProfile->fils_con_info is
not NULL before updating the erp sequence number.

Change-Id: I96541528d179b2b895a3f7f581e073e04bce76af
CRs-Fixed: 2405492

core/sme/src/csr/csr_api_roam.c

@@ -20846,11 +20846,32 @@ static void csr_copy_fils_join_rsp_roam_info(struct csr_roam_info *roam_info,
 			&roam_fils_info->hlp_data_len,
 			roam_fils_info->hlp_data);
 }
+
+/*
+ * csr_update_fils_erp_seq_num() - Update the FILS erp sequence number in
+ * roaming profile after roam complete
+ * @roam_info: roam_info pointer
+ * @erp_next_seq_num: next erp sequence number from firmware
+ *
+ * Return: NONE
+ */
+static
+void csr_update_fils_erp_seq_num(struct csr_roam_profile *roam_profile,
+				 uint16_t erp_next_seq_num)
+{
+	if (roam_profile->fils_con_info)
+		roam_profile->fils_con_info->sequence_number = erp_next_seq_num;
+}
 #else
 static inline
 void csr_copy_fils_join_rsp_roam_info(struct csr_roam_info *roam_info,
 				      struct roam_offload_synch_ind *roam_synch_data)
 {}
+
+static inline
+void csr_update_fils_erp_seq_num(struct csr_roam_profile *roam_profile,
+				 uint16_t erp_next_seq_num)
+{}
 #endif
 
 #ifdef WLAN_FEATURE_ROAM_OFFLOAD
@@ -21213,8 +21234,8 @@ static QDF_STATUS csr_process_roam_sync_callback(struct mac_context *mac_ctx,
 	roam_info->update_erp_next_seq_num =
 			roam_synch_data->update_erp_next_seq_num;
 	roam_info->next_erp_seq_num = roam_synch_data->next_erp_seq_num;
-	session->pCurRoamProfile->fils_con_info->sequence_number =
-					roam_info->next_erp_seq_num;
+	csr_update_fils_erp_seq_num(session->pCurRoamProfile,
+				    roam_info->next_erp_seq_num);
 	sme_debug("Update ERP Seq Num : %d, Next ERP Seq Num : %d",
 			roam_info->update_erp_next_seq_num,
 			roam_info->next_erp_seq_num);