pack: dereference cached pack entry on error #4027
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When trying to uncompress deltas in a packfile's delta chain, we try to add object bases to the packfile cache, subsequently decrementing its reference count if it has been added successfully. This may lead to a mismatched reference count in the case where we exit the loop early due to an encountered error. Fix the issue by decrementing the reference count in error cleanup.
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Just noticed this possible memory leak/reference count error as I took a quick look at #4023. It might cause the issue in case where we fail to unpack packfiles over NFS, as we would have a mismatched reference count then, triggering the assert. But I think it is rather unlikely. |
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When trying to uncompress deltas in a packfile's delta chain, we try to
add object bases to the packfile cache, subsequently decrementing its
reference count if it has been added successfully. This may lead to a
mismatched reference count in the case where we exit the loop early due
to an encountered error.
Fix the issue by decrementing the reference count in error cleanup.