579369 - Crash loading java applet [@ nsNPAPIPluginInstance::InitializePlugin]

Status: RESOLVED WONTFIX

(Core Graveyard :: Plug-ins, defect)

Description

[Boris Zbarsky [:bzbarsky]]

Incident: http://crash-stats.mozilla.com/report/index/39797ecb-8cad-4a53-a0c9-502662100716

Page I was loading: https://bugzilla.mozilla.org/attachment.cgi?id=457873

Details:

The crash is on this line in InitializePlugin:

  1210  nsresult newResult = mLibrary->NPP_New((char*)mimetype, &mNPP, (PRUint16)mode, count, (char**)names, (char**)values, NULL, &error);

and the crash address is 0x24 == 36.  NPP_New is the 9th entry in the PluginLibrary vtable.  Coincidence, probably not, if mLibrary is null or something.

Comment 1

[Benjamin Smedberg]

What does about:plugins say about Java?

Comment 2

[Boris Zbarsky [:bzbarsky]]

Java Plug-In 2 for NPAPI Browsers

    File: JavaPlugin2_NPAPI.plugin
    Version: 12.6.0
    Java Plug-In 2 for NPAPI Browsers

Note that I only suspect this is java; but it should be, since nothing else on that page should start a plug-in.

I'm guessing the ShowModal on the stack is one of the alerts in the testcase.

Comment 3

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

I'm marking this bug as WONTFIX per bug #1269807.

For more information see - https://blog.mozilla.org/futurereleases/2015/10/08/npapi-plugins-in-firefox/