From 15e0093e13dde98fb9ff3251203313ab4f0eacd4 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Fri, 30 May 2014 11:48:23 +0200
Subject: [PATCH] Fixed issue where the client could crash when sending
malformed data
---
peer.go | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/peer.go b/peer.go
index 3d140608b..60f2de711 100644
--- a/peer.go
+++ b/peer.go
@@ -450,9 +450,11 @@ func (p *Peer) HandleInbound() {
//ethutil.Config.Log.Debugf("[PEER] Could not find a similar block")
// If no blocks are found we send back a reply with msg not in chain
// and the last hash from get chain
- lastHash := msg.Data.Get(l - 1)
- //log.Printf("Sending not in chain with hash %x\n", lastHash.AsRaw())
- p.QueueMessage(ethwire.NewMessage(ethwire.MsgNotInChainTy, []interface{}{lastHash.Raw()}))
+ if l > 0 {
+ lastHash := msg.Data.Get(l - 1)
+ //log.Printf("Sending not in chain with hash %x\n", lastHash.AsRaw())
+ p.QueueMessage(ethwire.NewMessage(ethwire.MsgNotInChainTy, []interface{}{lastHash.Raw()}))
+ }
}
case ethwire.MsgNotInChainTy:
ethutil.Config.Log.Debugf("Not in chain: %x\n", msg.Data.Get(0).Bytes())
--
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