From 9f7b79af00a1ed57ab8640636041a81b58ecff59 Mon Sep 17 00:00:00 2001
From: Martin Holst Swende <martin@swende.se>
Date: Fri, 21 Aug 2020 13:27:10 +0200
Subject: [PATCH] eth/downloader: fix rollback issue on short chains

---
 eth/downloader/downloader.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/eth/downloader/downloader.go b/eth/downloader/downloader.go
index 83b757fa1..f3b0926d7 100644
--- a/eth/downloader/downloader.go
+++ b/eth/downloader/downloader.go
@@ -1502,6 +1502,8 @@ func (d *Downloader) processHeaders(origin uint64, pivot uint64, td *big.Int) er
 					head := chunk[len(chunk)-1].Number.Uint64()
 					if head-rollback > uint64(fsHeaderSafetyNet) {
 						rollback = head - uint64(fsHeaderSafetyNet)
+					} else {
+						rollback = 1
 					}
 				}
 				// Unless we're doing light chains, schedule the headers for associated content retrieval