Bug 50444 – chrome.dll!WebCore::Document::write ReadAV@NULL (64769eadff629b4366f33eb18eb92124)

• Component: DOM
• Status: NEW

[Berend-Jan Wever]

Created attachment 75475 [details]
Repro

Repro:
<script>
  window.open('repro.wav', 'test');
  setTimeout(function () {
    window.open('javascript:document.write("Ja");', 'test');
  }, 1000);
</script>
Must be hosted on a server because of file:// SOP restrictions.


id:             chrome.dll!WebCore::Document::write ReadAV@NULL (64769eadff629b4366f33eb18eb92124)
description:    Attempt to read from unallocated NULL pointer in chrome.dll!WebCore::Document::write
application:    Chromium 9.0.598.0
stack:          chrome.dll!WebCore::Document::write
                chrome.dll!WebCore::V8HTMLDocument::writeCallback
                chrome.dll!v8::internal::HandleApiCallHelper<...>
                chrome.dll!v8::internal::Builtin_HandleApiCall
                chrome.dll!v8::internal::Invoke
                chrome.dll!v8::internal::Execution::Call
                ...

[Alexey Proskuryakov]

Also crashes Safari 5.0.3 on Mac (can be opened from a local file here).

[Adam Barth]

I suspect this problem is that MediaDocument (or whatever) isn't really an HTMLDocument or don't have a legit HTMLDocumentParser.

[Alexey Proskuryakov]

See also: bug 25397.

[Berend-Jan Wever]

Created attachment 76980 [details]
Variation repro

I found a variation that also crashes with a NULL pointer but in a different part of the code. I expect this to be the same issue:
Repro.html:
<script>
  window.open('repro2.html', 'test2');
</script>

Repro2.html:
<script>
  window.open('repro.mid', 'test');
  setTimeout(function () {
    window.open('javascript:document.open("");parent.document.close()', 'test');
    location.reload();
  }, 100);
</script>

Repro.mid could be any midi file, repro should be loaded off a server with correct mime types to work.

id:             chrome.dll!WebCore::ResourceLoader::setShouldBufferData WriteAV@NULL (a07e47074c4b3b824a30d4fa9bef4782)
description:    Attempt to write to unallocated NULL pointer+0x25D in chrome.dll!WebCore::ResourceLoader::setShouldBufferData
application:    Chromium 10.0.617.0
stack:          chrome.dll!WebCore::ResourceLoader::setShouldBufferData
                chrome.dll!WebCore::PluginDocumentParser::appendBytes
                chrome.dll!WebCore::DocumentWriter::endIfNotLoadingMainResource
                chrome.dll!WebCore::Document::close
                chrome.dll!WebCore::HTMLDocumentInternal::closeCallback
                chrome.dll!v8::internal::HandleApiCallHelper<...>
                chrome.dll!v8::internal::Builtin_HandleApiCall
                chrome.dll!v8::internal::Invoke
                chrome.dll!v8::internal::Execution::Call
                ...