Android AssetManager2 Memory Corruption Fix

From the webpage screenshot, the following key information about the vulnerability can be obtained: Commit Information - Submitter: Yurii Zubrytskyi - Commit Time: May 1, 2023, 14:35:48 (UTC-0700) - Commit Time (associated build & release): October 11, 2023, 22:47:40 - Commit ID: - Parent Commit ID: - Tree ID: Commit Description - This commit reverts the previous commit , which introduced changes related to using reference-counted pointers for . - Primary Reason: Memory corruption issue. The object was not being released in , although Java requires them to be released only there. However, an explicit call existed, which led to destruction of objects still in use by some instances. - Changes Made: - Prepared a single, one-time shared pointer for the entire operation, instead of re-locking them on each iteration. - There is still approximately 5% performance regression when changing themes and objects, compared to the original 40%. - Changed log messages to warnings to avoid breaking applications. - Original Commit Comment: - Identified the main cause of memory corruption: Java expects to be released only in , but an explicit call was present, which destroyed objects still in use by some instances. - This change ensures that do not assume always exist, but instead attempt to lock them in memory when needed. - Added logging to record when assets objects are deleted while weak references still exist. Related errors will be generated in bug-related error reports, aiding in investigation. - Benchmark tests showed no regression, and devices are running well. Given that crashes were previously rare, waiting for any new reports or lack thereof. Related Fixes: Fixes 2 bugs: and . Related Tests - Unit tests, boot tests, benchmark tests - Old change ID: - (Cherry-picked from ) - (Cherry-picked from ) Related Change Info: Merged with Change ID: Files Changed: Changes affecting 27 files. List of Changed Files

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Android AssetManager2 Memory Corruption Fix