Make temporary channel ids unique in full_stack_target #367
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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).
Codecov Report
@@ Coverage Diff @@
## master #367 +/- ##
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+ Coverage 87.29% 87.3% +<.01%
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Files 29 29
Lines 15457 15457
=========================================
+ Hits 13493 13494 +1
+ Misses 1964 1963 -1
Continue to review full report at Codecov.
|
ariard
approved these changes
Jul 30, 2019
| 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() | ||
| } | ||
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| 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] |
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Fuzzing got a channel collision on 256-bit id for two subsequent channels ?!
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Sure, just gotta call one of the functions above exactly 256 times.
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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).