[NFSd,SUNRPC] fix nfsacl pointer arithmetic and pg_class initialization bugs

* Pointer arithmetic bug: p is in word units. This fixes a memory
  corruption with big acls.
* Initialize pg_class to prevent a NULL pointer access.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

Index: linux-2.6.12-rc4/fs/nfs/nfs3xdr.c
===================================================================
--- linux-2.6.12-rc4.orig/fs/nfs/nfs3xdr.c
+++ linux-2.6.12-rc4/fs/nfs/nfs3xdr.c
@@ -678,7 +678,7 @@ nfs3_xdr_setaclargs(struct rpc_rqst *req
 	/* put as much of the acls into head as possible. */
 	len_in_head = min_t(unsigned int, buf->head->iov_len - base, len);
 	len -= len_in_head;
-	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p + len_in_head);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p + (len_in_head >> 2));

 	for (count = 0; (count << PAGE_SHIFT) < len; count++) {
 		args->pages[count] = alloc_page(GFP_KERNEL);
Index: linux-2.6.12-rc4/fs/nfsd/nfssvc.c
===================================================================
--- linux-2.6.12-rc4.orig/fs/nfsd/nfssvc.c
+++ linux-2.6.12-rc4/fs/nfsd/nfssvc.c
@@ -376,6 +376,7 @@ static struct svc_program	nfsd_acl_progr
 	.pg_nvers		= NFSD_ACL_NRVERS,
 	.pg_vers		= nfsd_acl_version,
 	.pg_name		= "nfsd",
+	.pg_class		= "nfsd",
 	.pg_stats		= &nfsd_acl_svcstats,
 };