diff options
| -rw-r--r-- | eth/handler.go | 5 | ||||
| -rw-r--r-- | eth/sync.go | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/eth/handler.go b/eth/handler.go index 16e371227..8c2f5660d 100644 --- a/eth/handler.go +++ b/eth/handler.go @@ -171,6 +171,11 @@ func NewProtocolManager(config *params.ChainConfig, mode downloader.SyncMode, ne return blockchain.CurrentBlock().NumberU64() } inserter := func(blocks types.Blocks) (int, error) { + // If fast sync is running, deny importing weird blocks + if atomic.LoadUint32(&manager.fastSync) == 1 { + log.Warn("Discarded bad propagated block", "number", blocks[0].Number(), "hash", blocks[0].Hash()) + return 0, nil + } atomic.StoreUint32(&manager.acceptTxs, 1) // Mark initial sync done on any fetcher import return manager.blockchain.InsertChain(blocks) } diff --git a/eth/sync.go b/eth/sync.go index b0653acf9..8784b225d 100644 --- a/eth/sync.go +++ b/eth/sync.go @@ -183,6 +183,7 @@ func (pm *ProtocolManager) synchronise(peer *peer) { // The only scenario where this can happen is if the user manually (or via a // bad block) rolled back a fast sync node below the sync point. In this case // however it's safe to reenable fast sync. + atomic.StoreUint32(&pm.fastSync, 1) mode = downloader.FastSync } if err := pm.downloader.Synchronise(peer.id, pHead, pTd, mode); err != nil { |