dns: fix leak in dns v1 logging

Intermediate JsonBuilder object was not being freed.

Redmine issue:
https://redmine.openinfosecfoundation.org/issues/4086

diff --git a/src/output-json-dns.c b/src/output-json-dns.c
index f08d562cebcea90284d01118af23c30108025af6..1e922d9b638c8588c28c42d8d87822f6713afe53 100644 (file)
--- a/src/output-json-dns.c
+++ b/src/output-json-dns.c
@@ -381,6 +381,7 @@ static int JsonDnsLoggerToClient(ThreadVars *tv, void *thread_data,
                 break;
             }
             jb_set_object(jb, "dns", answer);
+            jb_free(answer);
 
             MemBufferReset(td->buffer);
             OutputJsonBuilderBuffer(jb, td->file_ctx, &td->buffer);
@@ -401,6 +402,7 @@ static int JsonDnsLoggerToClient(ThreadVars *tv, void *thread_data,
                 break;
             }
             jb_set_object(jb, "dns", answer);
+            jb_free(answer);
 
             MemBufferReset(td->buffer);
             OutputJsonBuilderBuffer(jb, td->file_ctx, &td->buffer);