diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index c51e189..359dfdd 100644
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -77,8 +77,7 @@ struct rpc_auth {
 				/* guess at number of u32's auth adds before
 				 * reply data; normally the verifier size: */
 	unsigned int		au_rslack;
-				/* for gss, used to calculate au_rslack: */
-	unsigned int		au_verfsize;
+	unsigned int		au_verfsize;	/* size of reply verifier */
 
 	unsigned int		au_flags;	/* various flags */
 	const struct rpc_authops *au_ops;		/* operations */
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index fda454c..731e7a4 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -1016,6 +1016,7 @@ gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
 	auth = &gss_auth->rpc_auth;
 	auth->au_cslack = GSS_CRED_SLACK >> 2;
 	auth->au_rslack = GSS_VERF_SLACK >> 2;
+	auth->au_verfsize = GSS_VERF_SLACK >> 2;
 	auth->au_flags = 0;
 	auth->au_ops = &authgss_ops;
 	auth->au_flavor = flavor;
diff --git a/net/sunrpc/auth_null.c b/net/sunrpc/auth_null.c
index bf96975..9ae0824 100644
--- a/net/sunrpc/auth_null.c
+++ b/net/sunrpc/auth_null.c
@@ -114,6 +114,7 @@ static
 struct rpc_auth null_auth = {
 	.au_cslack	= NUL_CALLSLACK,
 	.au_rslack	= NUL_REPLYSLACK,
+	.au_verfsize	= NUL_REPLYSLACK,
 	.au_ops		= &authnull_ops,
 	.au_flavor	= RPC_AUTH_NULL,
 	.au_count	= REFCOUNT_INIT(1),
diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index 5ea84a9..a93c564 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -163,6 +163,7 @@ unx_refresh(struct rpc_task *task)
 static int
 unx_validate(struct rpc_task *task, struct xdr_stream *xdr)
 {
+	struct rpc_auth *auth = task->tk_rqstp->rq_cred->cr_auth;
 	__be32 *p;
 	u32 size;
 
@@ -184,7 +185,8 @@ unx_validate(struct rpc_task *task, struct xdr_stream *xdr)
 	if (!p)
 		return -EIO;
 
-	task->tk_rqstp->rq_cred->cr_auth->au_rslack = (size >> 2) + 2;
+	auth->au_verfsize = XDR_QUADLEN(size) + 2;
+	auth->au_rslack = XDR_QUADLEN(size) + 2;
 	return 0;
 }
 
@@ -212,6 +214,7 @@ static
 struct rpc_auth		unix_auth = {
 	.au_cslack	= UNX_CALLSLACK,
 	.au_rslack	= NUL_REPLYSLACK,
+	.au_verfsize	= NUL_REPLYSLACK,
 	.au_ops		= &authunix_ops,
 	.au_flavor	= RPC_AUTH_UNIX,
 	.au_count	= REFCOUNT_INIT(1),