[PATCH] knfsd: Avoid use of unitialised variables on error path when nfs exports.

We need to zero various parts of 'exp' before any 'goto out', otherwise
when we go to free the contents... we die.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

fs/nfsd/export.c

@@ -469,6 +469,13 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 	nd.dentry = NULL;
 	exp.ex_path = NULL;
 
+	/* fs locations */
+	exp.ex_fslocs.locations = NULL;
+	exp.ex_fslocs.locations_count = 0;
+	exp.ex_fslocs.migrated = 0;
+
+	exp.ex_uuid = NULL;
+
 	if (mesg[mlen-1] != '\n')
 		return -EINVAL;
 	mesg[mlen-1] = 0;
@@ -509,13 +516,6 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 	if (exp.h.expiry_time == 0)
 		goto out;
 
-	/* fs locations */
-	exp.ex_fslocs.locations = NULL;
-	exp.ex_fslocs.locations_count = 0;
-	exp.ex_fslocs.migrated = 0;
-
-	exp.ex_uuid = NULL;
-
 	/* flags */
 	err = get_int(&mesg, &an_int);
 	if (err == -ENOENT)