1 files changed, 3 insertions, 0 deletions

diff --git a/fs/ceph/auth.c b/fs/ceph/auth.c
index d5872d4f92bf..b34ce0e41b4c 100644
--- a/fs/ceph/auth.c
+++ b/fs/ceph/auth.c
@@ -107,8 +107,11 @@ int ceph_auth_build_hello(struct ceph_auth_client *ac, void *buf, size_t len)
         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]);