nfsd: clean up an xdr reserved space calculation

We should use XDR_LEN to calculate reserved space in case the oid is not
a multiple of 4.

RESERVE_SPACE actually rounds up for us, but it's probably better to be
careful here.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 1dface03bd3e..dbd64a9d268b 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3263,7 +3263,7 @@ nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
 
                 if (rpcauth_get_gssinfo(pf, &info) == 0) {
                         supported++;
-                        RESERVE_SPACE(4 + 4 + info.oid.len + 4 + 4);
+                        RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4);
                         WRITE32(RPC_AUTH_GSS);
                         WRITE32(info.oid.len);
                         WRITEMEM(info.oid.data, info.oid.len);