[Webkit-unassigned] [Bug 242788] New: Don't nullify WebGLExtension::m_context on context loss.
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Jul 14 21:36:58 PDT 2022
https://bugs.webkit.org/show_bug.cgi?id=242788
Bug ID: 242788
Summary: Don't nullify WebGLExtension::m_context on context
loss.
Product: WebKit
Version: WebKit Nightly Build
Hardware: All
OS: All
Status: NEW
Severity: Major
Priority: P2
Component: WebGL
Assignee: webkit-unassigned at lists.webkit.org
Reporter: djg at apple.com
CC: dino at apple.com, kbr at google.com, kkinnunen at apple.com
WebGLExtension::loseParentContext() nulls m_context pointer. In the GPUP world, where any GL call can result in a context loss, this behaviour can lead to null pointer access at random places inside a WebGL extension object after the code has checked for a valid m_context pointer at function entry.
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