[webkit-changes] [WebKit/WebKit] 3b4a4e: [WPE] Fix crash on ThreadedCompositor::renderLayer...

[Pablo Saavedra Rodiño]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 3b4a4e93f1608825b13befdb6e76adec418763a1
      https://github.com/WebKit/WebKit/commit/3b4a4e93f1608825b13befdb6e76adec418763a1
  Author: Pablo Saavedra <psaavedra at igalia.com>
  Date:   2024-04-04 (Thu, 04 Apr 2024)

  Changed paths:
    M Source/WebCore/platform/graphics/texmap/TextureMapperPlatformLayerProxyDMABuf.cpp

  Log Message:
  -----------
  [WPE] Fix crash on ThreadedCompositor::renderLayerTree() during video playlist transitions
https://bugs.webkit.org/show_bug.cgi?id=272150

Reviewed by Miguel Gomez.

Unnoticed default usage of dmabuf was leading to missing checks in the dmabuf
proxy. This caused issues when activating a proxy in a TextureMapperLayer,
removing any reference that another layer might have had to the previous proxy.
Additionally, when invalidating, the reference to the proxy held by the TextureMapperLayer
was also removed.

This prevents an invalid memory access identified in the
CoordinatedGraphicsScene::paintToCurrentGLContext().

* Source/WebCore/platform/graphics/texmap/TextureMapperPlatformLayerProxyDMABuf.cpp:
(WebCore::TextureMapperPlatformLayerProxyDMABuf::activateOnCompositingThread):
(WebCore::TextureMapperPlatformLayerProxyDMABuf::invalidate):

Canonical link: https://commits.webkit.org/277071@main



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