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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>
This commit is contained in:
Chuck Lever 2010-12-14 14:58:01 +00:00 committed by Trond Myklebust
parent d8367c504e
commit 8111f37360
1 changed files with 1 additions and 1 deletions
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2
fs/nfs/nfs4xdr.c
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@ -4475,7 +4475,7 @@ static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_
goto out_overflow; goto out_overflow;
eof = be32_to_cpup(p++); eof = be32_to_cpup(p++);
count = be32_to_cpup(p); count = be32_to_cpup(p);
hdrlen = (u8 *) p - (u8 *) iov->iov_base; hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
recvd = req->rq_rcv_buf.len - hdrlen; recvd = req->rq_rcv_buf.len - hdrlen;
if (count > recvd) { if (count > recvd) {
dprintk("NFS: server cheating in read reply: " dprintk("NFS: server cheating in read reply: "