avoid uninitialised free of ldns_res

If an invalid rdclass was passed to getrrsetbyname() then
this would execute a free on an uninitialised pointer.
OpenSSH only ever calls this with a fixed and valid rdclass.

Reported by Joshua Rogers

1 files changed, 1 insertions, 1 deletions

diff --git a/openbsd-compat/getrrsetbyname-ldns.c b/openbsd-compat/getrrsetbyname-ldns.c
index 343720f10..4647b623b 100644
--- a/openbsd-compat/getrrsetbyname-ldns.c
+++ b/openbsd-compat/getrrsetbyname-ldns.c
@@ -69,7 +69,7 @@ getrrsetbyname(const char *hostname, unsigned int rdclass,
         struct rrsetinfo *rrset = NULL;
         struct rdatainfo *rdata;
         size_t len;
-        ldns_resolver *ldns_res;
+        ldns_resolver *ldns_res = NULL;
         ldns_rdf *domain = NULL;
         ldns_pkt *pkt = NULL;
         ldns_rr_list *rrsigs = NULL, *rrdata = NULL;