From 63c5ca1f0188f73b696fb00bf61a4ca1d343a2b7 Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Sat, 30 Apr 2016 04:08:02 +1000
Subject: [PATCH] Fix crash when peers have sent undersized bitfields and we
 get the torrent info

---
 connection.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/connection.go b/connection.go
index 432519f0..8d3c45ad 100644
--- a/connection.go
+++ b/connection.go
@@ -629,7 +629,7 @@ func (cn *connection) peerSentBitfield(bf []bool) error {
 	// We know that the last byte means that at most the last 7 bits are
 	// wasted.
 	cn.raisePeerMinPieces(len(bf) - 7)
-	if cn.t.haveInfo() {
+	if cn.t.haveInfo() && len(bf) > cn.t.numPieces() {
 		// Ignore known excess pieces.
 		bf = bf[:cn.t.numPieces()]
 	}
-- 
2.48.1