RESOLVED FIXED302068
[CoordinatedGraphics] Fix deadlock when media thread is trying to push a buffer while main thread is flushing layers 
https://bugs.webkit.org/show_bug.cgi?id=302068
Summary [CoordinatedGraphics] Fix deadlock when media thread is trying to push a buff...
Carlos Garcia Campos
Reported 2025-11-06 00:30:37 PST
During the layer flush the CoordinatedPlatformLayer lock is held and CoordinatedPlatformLayerBufferProxy::setDisplayBuffer needs to take the lock to push the new buffer too. CoordinatedPlatformLayerBufferProxy::consumePendingBufferIfNeeded(), called during layer flush from main thread waits on the proxy lock that is held by CoordinatedPlatformLayerBufferProxy::setDisplayBuffer which is waiting for the CoordinatedPlatformLayer lock. We need to release the proxy lock before taking the layer's one.
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Carlos Garcia Campos
Comment 1 2025-11-06 00:33:25 PST
Pull request: https://github.com/WebKit/WebKit/pull/53512
EWS
Comment 2 2025-11-06 05:06:58 PST
Committed 302647@main (c09f42b5726d): <https://commits.webkit.org/302647@main> Reviewed commits have been landed. Closing PR #53512 and removing active labels.
Radar WebKit Bug Importer
Comment 3 2025-11-06 05:07:11 PST
<rdar://problem/164164515>
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