From cc7f8f58e81b3607d5a003fe7789dadb7a99fe54 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Tue, 6 Jan 2015 00:17:05 +0100
Subject: [PATCH] Limit block extra to 1024
---
core/block_processor.go | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/core/block_processor.go b/core/block_processor.go
index 83399f472..127e97921 100644
--- a/core/block_processor.go
+++ b/core/block_processor.go
@@ -258,6 +258,10 @@ func (sm *BlockProcessor) CalculateTD(block *types.Block) (*big.Int, bool) {
// an uncle or anything that isn't on the current block chain.
// Validation validates easy over difficult (dagger takes longer time = difficult)
func (sm *BlockProcessor) ValidateBlock(block, parent *types.Block) error {
+ if len(block.Header().Extra) > 1024 {
+ return fmt.Errorf("Block extra data too long (%d)", len(block.Header().Extra))
+ }
+
expd := CalcDifficulty(block, parent)
if expd.Cmp(block.Header().Difficulty) < 0 {
return fmt.Errorf("Difficulty check failed for block %v, %v", block.Header().Difficulty, expd)
--
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