Fix potential peer_state deadlocks in finish_force_close_channel
#2597
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dunxen
previously approved these changes
Sep 25, 2023
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## main #2597 +/- ##
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Coverage 88.85% 88.86%
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Files 113 113
Lines 84482 84517 +35
Branches 84482 84517 +35
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+ Hits 75069 75103 +34
+ Misses 7213 7211 -2
- Partials 2200 2203 +3
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`ChannelManager::finish_force_close_channel` exists to do cleanups which must happen without the `per_peer_state` mutex held. However, because it lacked lock assertions, several changes snuck in recently which resulted in it running with peer-state locks held, risking a deadlock if some HTLCs need to be failed.
We have code to handle receiving `shutdown` messages on unfudned channels. However, it had no test coverage, which we add here.
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dunxen
approved these changes
Sep 26, 2023
wpaulino
approved these changes
Sep 26, 2023
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| // P2WSH | ||
| let script = Builder::new().push_int(0) | ||
| .push_slice(&[0; 20]) | ||
| .into_script(); |
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🤦 Will fix in #2591
Merged
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ChannelManager::finish_force_close_channelexists to do cleanups which must happen without theper_peer_statemutex held. However, because it lacked lock assertions, several changes snuck in recently which resulted in it running with peer-state locks held, risking a deadlock if some HTLCs need to be failed.