[Webkit-unassigned] [Bug 182490] New: [GTK] WaylandCompositor misusing eglGetProcAddress

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Feb 5 09:33:39 PST 2018


            Bug ID: 182490
           Summary: [GTK] WaylandCompositor misusing eglGetProcAddress
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Keywords: Gtk
          Severity: Normal
          Priority: P3
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: daniel at fooishbar.org
                CC: bugs-noreply at webkitgtk.org

In WaylandCompositor.cpp's initializeEGL(), eglBindWaylandDisplayWL() is called if eglGetProcAddress() returns any value for it. This causes a crash on newer Mesa when using software rendering: swrast drivers do not provide BindWaylandDisplay (as they rely on wl_shm instead of Mesa extensions), and newer Mesa asserts that the extension is enabled when the entrypoint is called.

The trivial fix would be to check for the extension's presence and fail initializeEGL() if they are not there.

The Mesa bug is here: https://bugs.freedesktop.org/show_bug.cgi?id=104949

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