From f06ca04451037bf4b250da55d408d06fc691c760 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Fri, 27 Mar 2020 04:35:31 -0700
Subject: [PATCH] avoid overflow

---
 weed/filer2/filechunks.go | 7 +++++++
 weed/filer2/stream.go     | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/weed/filer2/filechunks.go b/weed/filer2/filechunks.go
index fe7841fa7..4c972e14f 100644
--- a/weed/filer2/filechunks.go
+++ b/weed/filer2/filechunks.go
@@ -3,6 +3,7 @@ package filer2
 import (
 	"fmt"
 	"hash/fnv"
+	"math"
 	"sort"
 	"sync"
 
@@ -86,6 +87,12 @@ func ViewFromChunks(chunks []*filer_pb.FileChunk, offset int64, size int64) (vie
 func ViewFromVisibleIntervals(visibles []VisibleInterval, offset int64, size int64) (views []*ChunkView) {
 
 	stop := offset + size
+	if size == math.MaxInt64 {
+		stop = math.MaxInt64
+	}
+	if stop < offset {
+		stop = math.MaxInt64
+	}
 
 	for _, chunk := range visibles {
 
diff --git a/weed/filer2/stream.go b/weed/filer2/stream.go
index d71ef71f6..6dbc1ce72 100644
--- a/weed/filer2/stream.go
+++ b/weed/filer2/stream.go
@@ -61,7 +61,7 @@ var _ = io.ReadSeeker(&ChunkStreamReader{})
 
 func NewChunkStreamReaderFromFiler(masterClient *wdclient.MasterClient, chunks []*filer_pb.FileChunk) *ChunkStreamReader {
 
-	chunkViews := ViewFromChunks(chunks, 0, math.MaxInt64)
+	chunkViews := ViewFromChunks(chunks, 0, math.MaxInt32)
 
 	return &ChunkStreamReader{
 		chunkViews: chunkViews,