From d4338047af4902eeee7c75065294c1cd73da92a3 Mon Sep 17 00:00:00 2001
From: whyrusleeping <why@ipfs.io>
Date: Thu, 6 Feb 2020 22:39:24 -0800
Subject: [PATCH] mark bad should be respected for every incoming tipset

---
 chain/sync.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/chain/sync.go b/chain/sync.go
index 95ff9cd42..47fcf4843 100644
--- a/chain/sync.go
+++ b/chain/sync.go
@@ -118,6 +118,10 @@ func (syncer *Syncer) InformNewHead(from peer.ID, fts *store.FullTipSet) bool {
 	}
 
 	for _, b := range fts.Blocks {
+		if syncer.bad.Has(b.Cid()) {
+			log.Warnf("InformNewHead called on block marked as bad: %s", b.Cid())
+			return false
+		}
 		if err := syncer.ValidateMsgMeta(b); err != nil {
 			log.Warnf("invalid block received: %s", err)
 			return false