vmsplice-2.6.23.14.diff

--- linux-2.6.23.14/fs/splice.c.orig	2008-01-14 21:49:56.000000000 +0100
+++ linux-2.6.23.14/fs/splice.c	2008-02-12 02:49:22.000000000 +0100
@@ -1234,6 +1234,9 @@
 {
 	int partial;
 
+	if (!access_ok(VERIFY_READ, src, n))
+		return -EFAULT;
+
 	pagefault_disable();
 	partial = __copy_from_user_inatomic(dst, src, n);
 	pagefault_enable();
@@ -1286,7 +1289,7 @@
 		if (unlikely(!len))
 			break;
 		error = -EFAULT;
-		if (unlikely(!base))
+		if (!access_ok(VERIFY_READ, base, len))
 			break;
 
 		/*
@@ -1442,6 +1445,11 @@
 			break;
 		}
 
+		if (unlikely(!access_ok(VERIFY_WRITE, base, len))) {
+			error = -EFAULT;
+			break;
+		}
+
 		sd.len = 0;
 		sd.total_len = len;
 		sd.flags = flags;