zebra: Cleanup the memory from the hash for MPLS stuff

==1595641== 280 (80 direct, 200 indirect) bytes in 1 blocks are definitely lost in loss record 30 of 38
==1595641== at 0x483AB65: calloc (vg_replace_malloc.c:760)
==1595641== by 0x493C89C: qcalloc (memory.c:116)
==1595641== by 0x1E8426: lsp_alloc (zebra_mpls.c:1116)
==1595641== by 0x49147F1: hash_get (hash.c:162)
==1595641== by 0x1EC880: mpls_lsp_install (zebra_mpls.c:3192)
==1595641== by 0x1C51BB: zread_vrf_label (zapi_msg.c:3197)
==1595641== by 0x1C6F11: zserv_handle_commands (zapi_msg.c:3863)
==1595641== by 0x24D0F4: zserv_process_messages (zserv.c:523)
==1595641== by 0x498F4CC: thread_call (thread.c:2002)
==1595641== by 0x49253A2: frr_run (libfrr.c:1198)
==1595641== by 0x1A28BA: main (main.c:475)
==1595641==
==1595641== 1,400 (400 direct, 1,000 indirect) bytes in 5 blocks are definitely lost in loss record 35 of 38
==1595641== at 0x483AB65: calloc (vg_replace_malloc.c:760)
==1595641== by 0x493C89C: qcalloc (memory.c:116)
==1595641== by 0x1E8426: lsp_alloc (zebra_mpls.c:1116)
==1595641== by 0x49147F1: hash_get (hash.c:162)
==1595641== by 0x1EBD7C: mpls_zapi_labels_process (zebra_mpls.c:2915)
==1595641== by 0x1C35D9: zread_mpls_labels_add (zapi_msg.c:2513)
==1595641== by 0x1C6F11: zserv_handle_commands (zapi_msg.c:3863)
==1595641== by 0x24D0F4: zserv_process_messages (zserv.c:523)
==1595641== by 0x498F4CC: thread_call (thread.c:2002)
==1595641== by 0x49253A2: frr_run (libfrr.c:1198)
==1595641== by 0x1A28BA: main (main.c:475)

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
(cherry picked from commit 912b6a5)

Author: ton31337

zebra/zebra_mpls.c

@@ -4010,6 +4010,13 @@ void zebra_mpls_client_cleanup_vrf_label(uint8_t proto)
 	}
 }
 
+static void lsp_table_free(void *p)
+{
+	struct zebra_lsp *lsp = p;
+
+	XFREE(MTYPE_LSP, lsp);
+}
+
 /*
  * Called upon process exiting, need to delete LSP forwarding
  * entries from the kernel.
@@ -4018,9 +4025,9 @@ void zebra_mpls_client_cleanup_vrf_label(uint8_t proto)
 void zebra_mpls_close_tables(struct zebra_vrf *zvrf)
 {
 	hash_iterate(zvrf->lsp_table, lsp_uninstall_from_kernel, NULL);
-	hash_clean(zvrf->lsp_table, NULL);
+	hash_clean(zvrf->lsp_table, lsp_table_free);
 	hash_free(zvrf->lsp_table);
-	hash_clean(zvrf->slsp_table, NULL);
+	hash_clean(zvrf->slsp_table, lsp_table_free);
 	hash_free(zvrf->slsp_table);
 	route_table_finish(zvrf->fec_table[AFI_IP]);
 	route_table_finish(zvrf->fec_table[AFI_IP6]);