277661 2024-08-05 17:46:47 -0700 WebCoreAVFResourceLoader may give more data than requested. 2025-10-09 22:26:51 -0700 1 1 1 Unclassified WebKit Media WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 jean-yves.avenard jean-yves.avenard webkit-bug-importer oldest_to_newest 2050793 0 jean-yves.avenard 2024-08-05 17:46:47 -0700 Found by code review. https://searchfox.org/wubkat/source/Source/WebCore/platform/graphics/avfoundation/objc/WebCoreAVFResourceLoader.mm#432-446 If the AVAsset requested N bytes and the server responded with X bytes, where X >= N ; we will pass X bytes to the DataRequest. Additionally, under such circumstances, `bytesToUse` is greater than `remainingLength` and so the instruction `remainingLength -= bytesToUse;` to overflow being an unsigned. And so we will incorrectly expect more data to be received https://searchfox.org/wubkat/rev/b36cbce69fddb7da33823f316bd8ead5bebee970/Source/WebCore/platform/graphics/avfoundation/objc/WebCoreAVFResourceLoader.mm#459-461 2050794 1 webkit-bug-importer 2024-08-05 17:47:03 -0700 <rdar://problem/133256334> 2050809 2 jean-yves.avenard 2024-08-05 18:53:36 -0700 Pull request: https://github.com/WebKit/WebKit/pull/31763 2149890 3 ews-feeder 2025-10-09 22:26:50 -0700 Committed 301298@main (37c2e6ab592c): <https://commits.webkit.org/301298@main> Reviewed commits have been landed. Closing PR #31763 and removing active labels.