From dfc5842a89781c22e847913f723d6b0a4e439479 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= <peterke@gmail.com>
Date: Wed, 14 Feb 2018 21:09:20 +0200
Subject: [PATCH] les: add missing lock around peer access

---
 les/fetcher.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/les/fetcher.go b/les/fetcher.go
index 3fc4df30b..9d224176f 100644
--- a/les/fetcher.go
+++ b/les/fetcher.go
@@ -425,6 +425,9 @@ func (f *lightFetcher) nextRequest() (*distReq, uint64) {
 			},
 			canSend: func(dp distPeer) bool {
 				p := dp.(*peer)
+				f.lock.Lock()
+				defer f.lock.Unlock()
+
 				fp := f.peers[p]
 				return fp != nil && fp.nodeByHash[bestHash] != nil
 			},