diff --git a/fs/ceph/auth.c b/fs/ceph/auth.c
index d5872d4..b34ce0e 100644
--- a/fs/ceph/auth.c
+++ b/fs/ceph/auth.c
@@ -107,8 +107,11 @@
 	lenp = p;
 	p += sizeof(u32);
 
+	ceph_decode_need(&p, end, 1 + sizeof(u32), bad);
+	ceph_encode_8(&p, 1);
 	num = ARRAY_SIZE(supported_protocols);
 	ceph_encode_32(&p, num);
+	ceph_decode_need(&p, end, num * sizeof(u32), bad);
 	for (i = 0; i < num; i++)
 		ceph_encode_32(&p, supported_protocols[i]);
 
diff --git a/fs/ceph/auth_none.c b/fs/ceph/auth_none.c
index 631017e..b4ef6f0 100644
--- a/fs/ceph/auth_none.c
+++ b/fs/ceph/auth_none.c
@@ -62,6 +62,7 @@
 	if (!ai->built_authorizer) {
 		p = au->buf;
 		end = p + sizeof(au->buf);
+		ceph_encode_8(&p, 1);
 		ret = ceph_entity_name_encode(ac->name, &p, end - 8);
 		if (ret < 0)
 			goto bad;