null pointer derefernce on out of memory

diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index f2ad8c75bc1fbd243e76497dd16ef42ba61afb39..a2521f4a39b2bc1d80657a51a865473e326b70f1 100644 (file)
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -6529,7 +6529,8 @@ addclosest(dns_rbtdb_t *rbtdb, rdatasetheader_t *newheader,
  cleanup:
        dns_rdataset_disassociate(&neg);
        dns_rdataset_disassociate(&negsig);
-       free_noqname(mctx, &closest);
+       if (closest != NULL)
+               free_noqname(mctx, &closest);
        return(result);
 }