Disposing SKStreamAsset when asset MemoryBase is not IntPtr.Zero

[michaldobrodenka]

Extension public static Blob ToHarfBuzzBlob(this SKStreamAsset asset) may leak when asset MemoryBase is not IntPtr.Zero.

After freeing memory, Dispose to SKStreamAsset (SKNativeObject) is added.

Bugs Fixed

• Discussion ToHarfBuzzBlob() possible memory leak? #3373

Behavioral Changes

None.

Required skia PR

None.

PR Checklist

• Has tests (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Merged related skia PRs
• Changes adhere to coding standard
• Updated documentation

[michaldobrodenka]

@dotnet-policy-service agree pi 3. 10. 2025 o 13:37 dotnet-policy-service[bot] ***@***.***> napísal(a):

…

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[michaldobrodenka]

Fixes #3378

[molesmoke]

It is kind of odd that SKStreamAsset is disposed on one path but not the other (and the caller doesn't know which). My two cents is that the problem is more that SKShaper doesn't dispose the intermediate SKStreamAsset from the Typeface. The leaking stream could already have been destroyed by the time the constructor exits (assuming that the Font no longer requires access to the Blob - since it's written that way already).