eth: ensure from<to when tracing chain (credits Chen Nan via bugbounty)

2018-08-21 09:48:53 +02:00 · 2018-08-21 09:48:53 +02:00 · 106d196ec4
parent 6d1e292eef
commit 106d196ec4
1 changed files with 3 additions and 0 deletions
--- a/eth/api_tracer.go
+++ b/eth/api_tracer.go
@ -119,6 +119,9 @@ func (api *PrivateDebugAPI) TraceChain(ctx context.Context, start, end rpc.Block
 	if to == nil {
 		return nil, fmt.Errorf("end block #%d not found", end)
 	}
+	if from.Number().Cmp(to.Number()) >= 0 {
+		return nil, fmt.Errorf("end block (#%d) needs to come after start block (#%d)", end, start)
+	}
 	return api.traceChain(ctx, from, to, config)
 }