check gas limits on messages more places

chain/messagepool/messagepool.go

@@ -374,6 +374,10 @@ func (mp *MessagePool) addLocked(m *types.SignedMessage) error {
 		mp.blsSigCache.Add(m.Cid(), m.Signature)
 	}
 
+	if m.Message.GasLimit > build.BlockGasLimit {
+		return xerrors.Errorf("given message has too high of a gas limit")
+	}
+
 	if _, err := mp.api.PutMessage(m); err != nil {
 		log.Warnf("mpooladd cs.PutMessage failed: %s", err)
 		return err

miner/miner.go

@@ -421,6 +421,12 @@ func SelectMessages(ctx context.Context, al ActorLookup, ts *types.TipSet, msgs
 
 	for _, msg := range msgs {
 
+		// TODO: this should be in some more general 'validate message' call
+		if msg.Message.GasLimit > build.BlockGasLimit {
+			log.Warnf("message in mempool had too high of a gas limit (%d)", msg.Message.GasLimit)
+			continue
+		}
+
 		if msg.Message.To == address.Undef {
 			log.Warnf("message in mempool had bad 'To' address")
 			continue