From 44c0b9ae87648bc403382e2242a221b8d21ce09a Mon Sep 17 00:00:00 2001
From: yuzou <zouyu7@huawei.com>
Date: Thu, 4 Feb 2016 16:14:35 +0800
Subject: [PATCH] read the actual number of bytes according to the initial
 size.

Signed-off-by: yuzou <zouyu7@huawei.com>
---
 registry/storage/driver/testsuites/testsuites.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/registry/storage/driver/testsuites/testsuites.go b/registry/storage/driver/testsuites/testsuites.go
index 5c34cca6..b178cb3d 100644
--- a/registry/storage/driver/testsuites/testsuites.go
+++ b/registry/storage/driver/testsuites/testsuites.go
@@ -1184,7 +1184,11 @@ func (rr *randReader) Read(p []byte) (n int, err error) {
 	rr.m.Lock()
 	defer rr.m.Unlock()
 
-	n = copy(p, randomContents(int64(len(p))))
+	toread := int64(len(p))
+	if toread > rr.r {
+		toread = rr.r
+	}
+	n = copy(p, randomContents(toread))
 	rr.r -= int64(n)
 
 	if rr.r <= 0 {