Fix a full_stack_target crash

fuzz/fuzz_targets/full_stack_target.rs

@@ -33,7 +33,7 @@ use secp256k1::key::{PublicKey,SecretKey};
 use secp256k1::Secp256k1;
 
 use std::cell::RefCell;
-use std::collections::HashMap;
+use std::collections::{HashMap, hash_map};
 use std::cmp;
 use std::hash::Hash;
 use std::sync::Arc;
@@ -140,10 +140,11 @@ struct MoneyLossDetector<'a> {
 
 	peers: &'a RefCell<[bool; 256]>,
 	funding_txn: Vec<Transaction>,
+	txids_confirmed: HashMap<Sha256dHash, usize>,
 	header_hashes: Vec<Sha256dHash>,
 	height: usize,
 	max_height: usize,
-
+	blocks_connected: u32,
 }
 impl<'a> MoneyLossDetector<'a> {
 	pub fn new(peers: &'a RefCell<[bool; 256]>, manager: Arc<ChannelManager>, monitor: Arc<channelmonitor::SimpleManyChannelMonitor<OutPoint>>, handler: PeerManager<Peer<'a>>) -> Self {
@@ -154,17 +155,34 @@ impl<'a> MoneyLossDetector<'a> {
 
 			peers,
 			funding_txn: Vec::new(),
+			txids_confirmed: HashMap::new(),
 			header_hashes: vec![Default::default()],
 			height: 0,
 			max_height: 0,
+			blocks_connected: 0,
 		}
 	}
 
-	fn connect_block(&mut self, txn: &[&Transaction], txn_idxs: &[u32]) {
-		let header = BlockHeader { version: 0x20000000, prev_blockhash: self.header_hashes[self.height], merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
+	fn connect_block(&mut self, all_txn: &[Transaction]) {
+		let mut txn = Vec::with_capacity(all_txn.len());
+		let mut txn_idxs = Vec::with_capacity(all_txn.len());
+		for (idx, tx) in all_txn.iter().enumerate() {
+			let txid = Sha256dHash::from_data(&serialize(tx).unwrap()[..]);
+			match self.txids_confirmed.entry(txid) {
+				hash_map::Entry::Vacant(e) => {
+					e.insert(self.height);
+					txn.push(tx);
+					txn_idxs.push(idx as u32 + 1);
+				},
+				_ => {},
+			}
+		}
+
+		let header = BlockHeader { version: 0x20000000, prev_blockhash: self.header_hashes[self.height], merkle_root: Default::default(), time: self.blocks_connected, bits: 42, nonce: 42 };
 		self.height += 1;
-		self.manager.block_connected(&header, self.height as u32, txn, txn_idxs);
-		(*self.monitor).block_connected(&header, self.height as u32, txn, txn_idxs);
+		self.blocks_connected += 1;
+		self.manager.block_connected(&header, self.height as u32, &txn[..], &txn_idxs[..]);
+		(*self.monitor).block_connected(&header, self.height as u32, &txn[..], &txn_idxs[..]);
 		if self.header_hashes.len() > self.height {
 			self.header_hashes[self.height] = header.bitcoin_hash();
 		} else {
@@ -180,6 +198,10 @@ impl<'a> MoneyLossDetector<'a> {
 			let header = BlockHeader { version: 0x20000000, prev_blockhash: self.header_hashes[self.height], merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 			self.manager.block_disconnected(&header);
 			self.monitor.block_disconnected(&header);
+			let removal_height = self.height;
+			self.txids_confirmed.retain(|_, height| {
+				removal_height != *height
+			});
 		}
 	}
 }
@@ -280,7 +302,7 @@ pub fn do_test(data: &[u8], logger: &Arc<Logger>) {
 
 	let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin, Arc::clone(&logger)));
 	let broadcast = Arc::new(TestBroadcaster{});
-	let monitor = channelmonitor::SimpleManyChannelMonitor::new(watch.clone(), broadcast.clone());
+	let monitor = channelmonitor::SimpleManyChannelMonitor::new(watch.clone(), broadcast.clone(), Arc::clone(&logger));
 
 	let keys_manager = Arc::new(KeyProvider { node_secret: our_network_key.clone() });
 	let channelmanager = ChannelManager::new(slice_to_be32(get_slice!(4)), get_slice!(1)[0] != 0, Network::Bitcoin, fee_est.clone(), monitor.clone(), watch.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone()).unwrap();
@@ -398,36 +420,36 @@ pub fn do_test(data: &[u8], logger: &Arc<Logger>) {
 				}
 			},
 			10 => {
-				for funding_generation in pending_funding_generation.drain(..) {
+				'outer_loop: for funding_generation in pending_funding_generation.drain(..) {
 					let mut tx = Transaction { version: 0, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 							value: funding_generation.1, script_pubkey: funding_generation.2,
 						}] };
-					let funding_output = OutPoint::new(Sha256dHash::from_data(&serialize(&tx).unwrap()[..]), 0);
-					let mut found_duplicate_txo = false;
-					for chan in channelmanager.list_channels() {
-						if chan.channel_id == funding_output.to_channel_id() {
-							found_duplicate_txo = true;
+					let funding_output = 'search_loop: loop {
+						let funding_txid = Sha256dHash::from_data(&serialize(&tx).unwrap()[..]);
+						if let None = loss_detector.txids_confirmed.get(&funding_txid) {
+							let outpoint = OutPoint::new(funding_txid, 0);
+							for chan in channelmanager.list_channels() {
+								if chan.channel_id == outpoint.to_channel_id() {
+									tx.version += 1;
+									continue 'search_loop;
+								}
+							}
+							break outpoint;
 						}
-					}
-					if !found_duplicate_txo {
-						channelmanager.funding_transaction_generated(&funding_generation.0, funding_output.clone());
-						pending_funding_signatures.insert(funding_output, tx);
-					}
+						tx.version += 1;
+						if tx.version > 0xff {
+							continue 'outer_loop;
+						}
+					};
+					channelmanager.funding_transaction_generated(&funding_generation.0, funding_output.clone());
+					pending_funding_signatures.insert(funding_output, tx);
 				}
 			},
 			11 => {
 				if !pending_funding_relay.is_empty() {
-					let mut txn = Vec::with_capacity(pending_funding_relay.len());
-					let mut txn_idxs = Vec::with_capacity(pending_funding_relay.len());
-					for (idx, tx) in pending_funding_relay.iter().enumerate() {
-						txn.push(tx);
-						txn_idxs.push(idx as u32 + 1);
-					}
-
-					loss_detector.connect_block(&txn[..], &txn_idxs[..]);
-					txn_idxs.clear();
+					loss_detector.connect_block(&pending_funding_relay[..]);
 					for _ in 2..100 {
-						loss_detector.connect_block(&txn[..], &txn_idxs[..]);
+						loss_detector.connect_block(&[]);
 					}
 				}
 				for tx in pending_funding_relay.drain(..) {
@@ -437,11 +459,11 @@ pub fn do_test(data: &[u8], logger: &Arc<Logger>) {
 			12 => {
 				let txlen = slice_to_be16(get_slice!(2));
 				if txlen == 0 {
-					loss_detector.connect_block(&[], &[]);
+					loss_detector.connect_block(&[]);
 				} else {
 					let txres: Result<Transaction, _> = deserialize(get_slice!(txlen));
 					if let Ok(tx) = txres {
-						loss_detector.connect_block(&[&tx], &[1]);
+						loss_detector.connect_block(&[tx]);
 					} else {
 						return;
 					}

src/ln/channelmanager.rs

@@ -4051,7 +4051,7 @@ mod tests {
 			let mut seed = [0; 32];
 			rng.fill_bytes(&mut seed);
 			let keys_manager = Arc::new(keysinterface::KeysManager::new(&seed, Network::Testnet, Arc::clone(&logger)));
-			let chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(chain_monitor.clone(), tx_broadcaster.clone()));
+			let chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(chain_monitor.clone(), tx_broadcaster.clone(), logger.clone()));
 			let node = ChannelManager::new(0, true, Network::Testnet, feeest.clone(), chan_monitor.clone(), chain_monitor.clone(), tx_broadcaster.clone(), Arc::clone(&logger), keys_manager.clone()).unwrap();
 			let router = Router::new(PublicKey::from_secret_key(&secp_ctx, &keys_manager.get_node_secret()), chain_monitor.clone(), Arc::clone(&logger));
 			nodes.push(Node { chain_monitor, tx_broadcaster, chan_monitor, node, router, node_seed: seed,
@@ -6881,7 +6881,7 @@ mod tests {
 		let mut chan_0_monitor_serialized = VecWriter(Vec::new());
 		nodes[0].chan_monitor.simple_monitor.monitors.lock().unwrap().iter().next().unwrap().1.write_for_disk(&mut chan_0_monitor_serialized).unwrap();
 
-		nodes[0].chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(nodes[0].chain_monitor.clone(), nodes[0].tx_broadcaster.clone()));
+		nodes[0].chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(nodes[0].chain_monitor.clone(), nodes[0].tx_broadcaster.clone(), Arc::new(test_utils::TestLogger::new())));
 		let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
 		let (_, chan_0_monitor) = <(Sha256dHash, ChannelMonitor)>::read(&mut chan_0_monitor_read, Arc::new(test_utils::TestLogger::new())).unwrap();
 		assert!(chan_0_monitor_read.is_empty());
@@ -6945,7 +6945,7 @@ mod tests {
 		let mut chan_0_monitor_serialized = VecWriter(Vec::new());
 		nodes[0].chan_monitor.simple_monitor.monitors.lock().unwrap().iter().next().unwrap().1.write_for_disk(&mut chan_0_monitor_serialized).unwrap();
 
-		nodes[0].chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(nodes[0].chain_monitor.clone(), nodes[0].tx_broadcaster.clone()));
+		nodes[0].chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(nodes[0].chain_monitor.clone(), nodes[0].tx_broadcaster.clone(), Arc::new(test_utils::TestLogger::new())));
 		let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
 		let (_, chan_0_monitor) = <(Sha256dHash, ChannelMonitor)>::read(&mut chan_0_monitor_read, Arc::new(test_utils::TestLogger::new())).unwrap();
 		assert!(chan_0_monitor_read.is_empty());
@@ -7004,7 +7004,7 @@ mod tests {
 			node_0_monitors_serialized.push(writer.0);
 		}
 
-		nodes[0].chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(nodes[0].chain_monitor.clone(), nodes[0].tx_broadcaster.clone()));
+		nodes[0].chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(nodes[0].chain_monitor.clone(), nodes[0].tx_broadcaster.clone(), Arc::new(test_utils::TestLogger::new())));
 		let mut node_0_monitors = Vec::new();
 		for serialized in node_0_monitors_serialized.iter() {
 			let mut read = &serialized[..];

src/ln/channelmonitor.rs

@@ -112,6 +112,7 @@ pub struct SimpleManyChannelMonitor<Key> {
 	chain_monitor: Arc<ChainWatchInterface>,
 	broadcaster: Arc<BroadcasterInterface>,
 	pending_events: Mutex<Vec<events::Event>>,
+	logger: Arc<Logger>,
 }
 
 impl<Key : Send + cmp::Eq + hash::Hash> ChainListener for SimpleManyChannelMonitor<Key> {
@@ -144,12 +145,13 @@ impl<Key : Send + cmp::Eq + hash::Hash> ChainListener for SimpleManyChannelMonit
 impl<Key : Send + cmp::Eq + hash::Hash + 'static> SimpleManyChannelMonitor<Key> {
 	/// Creates a new object which can be used to monitor several channels given the chain
 	/// interface with which to register to receive notifications.
-	pub fn new(chain_monitor: Arc<ChainWatchInterface>, broadcaster: Arc<BroadcasterInterface>) -> Arc<SimpleManyChannelMonitor<Key>> {
+	pub fn new(chain_monitor: Arc<ChainWatchInterface>, broadcaster: Arc<BroadcasterInterface>, logger: Arc<Logger>) -> Arc<SimpleManyChannelMonitor<Key>> {
 		let res = Arc::new(SimpleManyChannelMonitor {
 			monitors: Mutex::new(HashMap::new()),
 			chain_monitor,
 			broadcaster,
 			pending_events: Mutex::new(Vec::new()),
+			logger,
 		});
 		let weak_res = Arc::downgrade(&res);
 		res.chain_monitor.register_listener(weak_res);
@@ -160,12 +162,19 @@ impl<Key : Send + cmp::Eq + hash::Hash + 'static> SimpleManyChannelMonitor<Key>
 	pub fn add_update_monitor_by_key(&self, key: Key, monitor: ChannelMonitor) -> Result<(), HandleError> {
 		let mut monitors = self.monitors.lock().unwrap();
 		match monitors.get_mut(&key) {
-			Some(orig_monitor) => return orig_monitor.insert_combine(monitor),
+			Some(orig_monitor) => {
+				log_trace!(self, "Updating Channel Monitor for channel {}", log_funding_option!(monitor.funding_txo));
+				return orig_monitor.insert_combine(monitor);
+			},
 			None => {}
 		};
 		match &monitor.funding_txo {
-			&None => self.chain_monitor.watch_all_txn(),
+			&None => {
+				log_trace!(self, "Got new Channel Monitor for no-funding-set channel (monitoring all txn!)");
+				self.chain_monitor.watch_all_txn()
+			},
 			&Some((ref outpoint, ref script)) => {
+				log_trace!(self, "Got new Channel Monitor for channel {}", log_bytes!(outpoint.to_channel_id()[..]));
 				self.chain_monitor.install_watch_tx(&outpoint.txid, script);
 				self.chain_monitor.install_watch_outpoint((outpoint.txid, outpoint.index as u32), script);
 			},

src/util/macro_logger.rs

@@ -52,6 +52,21 @@ macro_rules! log_funding_channel_id {
 	}
 }
 
+pub(crate) struct DebugFundingOption<'a, T: 'a>(pub &'a Option<(OutPoint, T)>);
+impl<'a, T> std::fmt::Display for DebugFundingOption<'a, T> {
+	fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
+		match self.0.as_ref() {
+			Some(&(ref funding_output, _)) => DebugBytes(&funding_output.to_channel_id()[..]).fmt(f),
+			None => write!(f, "without funding output set"),
+		}
+	}
+}
+macro_rules! log_funding_option {
+	($funding_option: expr) => {
+		::util::macro_logger::DebugFundingOption(&$funding_option)
+	}
+}
+
 pub(crate) struct DebugRoute<'a>(pub &'a Route);
 impl<'a> std::fmt::Display for DebugRoute<'a> {
 	fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {

src/util/test_utils.rs

@@ -42,10 +42,10 @@ pub struct TestChannelMonitor {
 	pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>,
 }
 impl TestChannelMonitor {
-	pub fn new(chain_monitor: Arc<chaininterface::ChainWatchInterface>, broadcaster: Arc<chaininterface::BroadcasterInterface>) -> Self {
+	pub fn new(chain_monitor: Arc<chaininterface::ChainWatchInterface>, broadcaster: Arc<chaininterface::BroadcasterInterface>, logger: Arc<Logger>) -> Self {
 		Self {
 			added_monitors: Mutex::new(Vec::new()),
-			simple_monitor: channelmonitor::SimpleManyChannelMonitor::new(chain_monitor, broadcaster),
+			simple_monitor: channelmonitor::SimpleManyChannelMonitor::new(chain_monitor, broadcaster, logger),
 			update_ret: Mutex::new(Ok(())),
 		}
 	}