[PATCH] nfsd: make calculate reserved space correctly

[Kinglong Mee <kinglongmee@gmail.com>]

rpcsec_gss_oid is defined as below, So, must using XDR_LEN to calculate reserved space.
When len is not the multiples of 4, client will get bad data.

struct rpcsec_gss_oid {
        unsigned int    len;
        u8              data[GSS_OID_MAX_LEN];
};

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
 fs/nfsd/nfs4xdr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index b0b886e..a57e67d 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3233,7 +3233,7 @@ 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);
-- 
1.8.4.2