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Overlapping blocks on freelist (on stack: GroupWriter::recreate_freelist()) #7006

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sync-by-unito bot opened this issue Sep 28, 2023 · 0 comments
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sync-by-unito bot commented Sep 28, 2023

Issues which may be related to overlapping blocks in the freelists.

  1. Double free but also corrupt file, which means it is different from the stuff fixed in Freelist corruption issues #6813
  1. Overlaps among blocks freed over separate transactions - this is detected by GroupWriter::recreate_freelist()

OH also: #5993, was a presumably fix for several bugs with similar stacks:

This may indicate that we did not fix the root cause, but merely changed the timing enough to hide the real problem.


A few similar old issue from differents repos either closed without fix or known cause or still presumably valid:


Root cause unknown, prime suspects:

  • Mutex emulation on iOS (and possibly windows) (but if so, then the data races will need a different explanation)
  • Online compaction
  • Invalid changes to the m_baseline member of the allocator (this could be some interaction between online compaction and async commit)
  • Invalid sharing of history objects (or part of their representation).

Cleared:

@sync-by-unito sync-by-unito bot closed this as completed Oct 18, 2024
@github-actions github-actions bot locked as resolved and limited conversation to collaborators Nov 17, 2024
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