Make temporary channel ids unique in full_stack_target

This avoids a crash where a channel with a duplicate id is created
immediately after another is closed, where the other still has a
pending funding generation event. Resulting in funding generation
being passed to the wrong channel (which isn't in an appropriate
state).

diff --git a/fuzz/fuzz_targets/full_stack_target.rs b/fuzz/fuzz_targets/full_stack_target.rs
index acd757882b9825a77e2685ff74dae19608fead07..76beac598f574257556c7ef572dae7eeeb1031dd 100644 (file)
--- a/fuzz/fuzz_targets/full_stack_target.rs
+++ b/fuzz/fuzz_targets/full_stack_target.rs
@@ -49,7 +49,7 @@ use std::collections::{HashMap, hash_map};
 use std::cmp;
 use std::hash::Hash;
 use std::sync::Arc;
-use std::sync::atomic::{AtomicU8,AtomicUsize,Ordering};
+use std::sync::atomic::{AtomicU64,AtomicUsize,Ordering};
 
 #[inline]
 pub fn slice_to_be16(v: &[u8]) -> u16 {
@@ -236,7 +236,7 @@ impl<'a> Drop for MoneyLossDetector<'a> {
 
 struct KeyProvider {
        node_secret: SecretKey,
-       counter: AtomicU8,
+       counter: AtomicU64,
 }
 impl KeysInterface for KeyProvider {
        fn get_node_secret(&self) -> SecretKey {
@@ -256,7 +256,7 @@ impl KeysInterface for KeyProvider {
        }
 
        fn get_channel_keys(&self, inbound: bool) -> ChannelKeys {
-               let ctr = self.counter.fetch_add(1, Ordering::Relaxed);
+               let ctr = self.counter.fetch_add(1, Ordering::Relaxed) as u8;
                if inbound {
                        ChannelKeys {
                                funding_key:               SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, ctr]).unwrap(),
@@ -279,13 +279,14 @@ impl KeysInterface for KeyProvider {
        }
 
        fn get_session_key(&self) -> SecretKey {
-               let ctr = self.counter.fetch_add(1, Ordering::Relaxed);
+               let ctr = self.counter.fetch_add(1, Ordering::Relaxed) as u8;
                SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, ctr]).unwrap()
        }
 
        fn get_channel_id(&self) -> [u8; 32] {
                let ctr = self.counter.fetch_add(1, Ordering::Relaxed);
-               [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 14, ctr]
+               [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+               (ctr >> 8*7) as u8, (ctr >> 8*6) as u8, (ctr >> 8*5) as u8, (ctr >> 8*4) as u8, (ctr >> 8*3) as u8, (ctr >> 8*2) as u8, (ctr >> 8*1) as u8, 14, (ctr >> 8*0) as u8]
        }
 }
 
@@ -326,7 +327,7 @@ pub fn do_test(data: &[u8], logger: &Arc<Logger>) {
        let broadcast = Arc::new(TestBroadcaster{});
        let monitor = channelmonitor::SimpleManyChannelMonitor::new(watch.clone(), broadcast.clone(), Arc::clone(&logger), fee_est.clone());
 
-       let keys_manager = Arc::new(KeyProvider { node_secret: our_network_key.clone(), counter: AtomicU8::new(0) });
+       let keys_manager = Arc::new(KeyProvider { node_secret: our_network_key.clone(), counter: AtomicU64::new(0) });
        let mut config = UserConfig::new();
        config.channel_options.fee_proportional_millionths =  slice_to_be32(get_slice!(4));
        config.channel_options.announced_channel = get_slice!(1)[0] != 0;