Merge branch 'for-2.6.27' of git://linux-nfs.org/~bfields/linux

* 'for-2.6.27' of git://linux-nfs.org/~bfields/linux:
  nfsd: fix buffer overrun decoding NFSv4 acl
  sunrpc: fix possible overrun on read of /proc/sys/sunrpc/transports
  nfsd: fix compound state allocation error handling
  svcrdma: Fix race between svc_rdma_recvfrom thread and the dto_tasklet

3 files changed, 10 insertions, 21 deletions

diff --git a/net/sunrpc/sysctl.c b/net/sunrpc/sysctl.c
index 0f8c439b848..5231f7aaac0 100644
--- a/net/sunrpc/sysctl.c
+++ b/net/sunrpc/sysctl.c
@@ -60,24 +60,14 @@ static int proc_do_xprt(ctl_table *table, int write, struct file *file,
 			void __user *buffer, size_t *lenp, loff_t *ppos)
 {
 	char tmpbuf[256];
-	int len;
+	size_t len;
+
 	if ((*ppos && !write) || !*lenp) {
 		*lenp = 0;
 		return 0;
 	}
-	if (write)
-		return -EINVAL;
-	else {
-		len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
-		if (!access_ok(VERIFY_WRITE, buffer, len))
-			return -EFAULT;
-
-		if (__copy_to_user(buffer, tmpbuf, len))
-			return -EFAULT;
-	}
-	*lenp -= len;
-	*ppos += len;
-	return 0;
+	len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
+	return simple_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len);
 }
 
 static int
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index b4b17f44cb2..74de31a0661 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -443,18 +443,18 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp)
 
 	dprintk("svcrdma: rqstp=%p\n", rqstp);
 
-	spin_lock_bh(&rdma_xprt->sc_read_complete_lock);
+	spin_lock_bh(&rdma_xprt->sc_rq_dto_lock);
 	if (!list_empty(&rdma_xprt->sc_read_complete_q)) {
 		ctxt = list_entry(rdma_xprt->sc_read_complete_q.next,
 				  struct svc_rdma_op_ctxt,
 				  dto_q);
 		list_del_init(&ctxt->dto_q);
 	}
-	spin_unlock_bh(&rdma_xprt->sc_read_complete_lock);
-	if (ctxt)
+	if (ctxt) {
+		spin_unlock_bh(&rdma_xprt->sc_rq_dto_lock);
 		return rdma_read_complete(rqstp, ctxt);
+	}
 
-	spin_lock_bh(&rdma_xprt->sc_rq_dto_lock);
 	if (!list_empty(&rdma_xprt->sc_rq_dto_q)) {
 		ctxt = list_entry(rdma_xprt->sc_rq_dto_q.next,
 				  struct svc_rdma_op_ctxt,
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 19ddc382b77..900cb69728c 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -359,11 +359,11 @@ static void sq_cq_reap(struct svcxprt_rdma *xprt)
 			if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) {
 				struct svc_rdma_op_ctxt *read_hdr = ctxt->read_hdr;
 				BUG_ON(!read_hdr);
+				spin_lock_bh(&xprt->sc_rq_dto_lock);
 				set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags);
-				spin_lock_bh(&xprt->sc_read_complete_lock);
 				list_add_tail(&read_hdr->dto_q,
 					      &xprt->sc_read_complete_q);
-				spin_unlock_bh(&xprt->sc_read_complete_lock);
+				spin_unlock_bh(&xprt->sc_rq_dto_lock);
 				svc_xprt_enqueue(&xprt->sc_xprt);
 			}
 			svc_rdma_put_context(ctxt, 0);
@@ -428,7 +428,6 @@ static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv,
 	init_waitqueue_head(&cma_xprt->sc_send_wait);
 
 	spin_lock_init(&cma_xprt->sc_lock);
-	spin_lock_init(&cma_xprt->sc_read_complete_lock);
 	spin_lock_init(&cma_xprt->sc_rq_dto_lock);
 
 	cma_xprt->sc_ord = svcrdma_ord;