NFSv4.2: decode_read_plus_data() must skip padding after data segment

All XDR opaque object sizes are 32-bit aligned, and a data segment is no
exception.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index 1c21db6..4c6bce3 100644 (file)
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -1038,7 +1038,9 @@ static int decode_read_plus_data(struct xdr_stream *xdr, struct nfs_pgio_res *re
 
        p = xdr_decode_hyper(p, &offset);
        count = be32_to_cpup(p);
-       recvd = xdr_align_data(xdr, res->count, count);
+       recvd = xdr_align_data(xdr, res->count, xdr_align_size(count));
+       if (recvd > count)
+               recvd = count;
        res->count += recvd;
 
        if (count > recvd) {