knfsd: Allow NFSv2/3 WRITE calls to succeed when krb5i etc is used.

[~andy/linux] / fs / nfsd / nfsxdr.c

diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index 986f9b32083c655f792ada9476d3658a71bb37d7..b86e3658a0af10ebce825e260ee1fc5fd879f367 100644 (file)
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -313,8 +313,11 @@ nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
         * Round the length of the data which was specified up to
         * the next multiple of XDR units and then compare that
         * against the length which was actually received.
+        * Note that when RPCSEC/GSS (for example) is used, the
+        * data buffer can be padded so dlen might be larger
+        * than required.  It must never be smaller.
         */
-       if (dlen != XDR_QUADLEN(len)*4)
+       if (dlen < XDR_QUADLEN(len)*4)
                return 0;
 
        rqstp->rq_vec[0].iov_base = (void*)p;