From 9708df47d1be0943b6bf548c0dc0f1a06f5fcafa Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Sat, 31 Oct 2020 15:50:01 -0700
Subject: [PATCH] ensure offset in the index file is positive

---
 weed/storage/volume_checking.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/weed/storage/volume_checking.go b/weed/storage/volume_checking.go
index 048944199..00e04047f 100644
--- a/weed/storage/volume_checking.go
+++ b/weed/storage/volume_checking.go
@@ -22,7 +22,7 @@ func CheckAndFixVolumeDataIntegrity(v *Volume, indexFile *os.File) (lastAppendAt
 		return 0, nil
 	}
 	healthyIndexSize := indexSize
-	for i := 1; i <= 10; i++ {
+	for i := 1; i <= 10 && indexSize >= int64(i)*NeedleMapEntrySize; i++ {
 		// check and fix last 10 entries
 		lastAppendAtNs, err = doCheckAndFixVolumeData(v, indexFile, indexSize-int64(i)*NeedleMapEntrySize)
 		if err == io.EOF {