NFS: Fix hdrlen calculation in NFSv4's decode_read()
When computing the length of the header, be sure to include the four octets consumed by "count". Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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@ -4475,7 +4475,7 @@ static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_
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goto out_overflow;
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eof = be32_to_cpup(p++);
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count = be32_to_cpup(p);
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hdrlen = (u8 *) p - (u8 *) iov->iov_base;
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hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
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recvd = req->rq_rcv_buf.len - hdrlen;
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if (count > recvd) {
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dprintk("NFS: server cheating in read reply: "
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