autofs-5.1.8 - fix memory leak in xdr_exports()

From: Ian Kent <raven@themaw.net>

Converting xdr_exports() to not be recursive introduced a memory leak
if an error is encountered, fix it.

Signed-off-by: Ian Kent <raven@themaw.net>
---
 CHANGELOG      |    1 +
 lib/rpc_subs.c |    7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

--- autofs-5.1.4.orig/CHANGELOG
+++ autofs-5.1.4/CHANGELOG
@@ -89,6 +89,7 @@
 - fix loop under run in cache_get_offset_parent().
 - simplify cache_add() a little.
 - fix use after free in tree_mapent_delete_offset_tree().
+- fix memory leak in xdr_exports().
 
 xx/xx/2018 autofs-5.1.5
 - fix flag file permission.
--- autofs-5.1.4.orig/lib/rpc_subs.c
+++ autofs-5.1.4/lib/rpc_subs.c
@@ -1151,8 +1151,13 @@ bool_t xdr_exports(XDR *xdrs, struct exp
 
 	export = (char **) exports;
 	while (1) {
-		if (!xdr_pointer(xdrs, export, size, (xdrproc_t) xdr_export))
+		if (!xdr_pointer(xdrs, export, size, (xdrproc_t) xdr_export)) {
+			if (*exports) {
+				rpc_exports_free(*exports);
+				*exports = NULL;
+			}
 			return FALSE;
+		}
 		if (!*export)
 			break;
 		export = (char **) &((struct exportinfo *) *export)->next;