#13893: Torbrowser crashes on start when using MS EMET 5.x
-------------------------------------------------+-------------------------
 Reporter:  Diapolo                              |          Owner:  gk
     Type:  defect                               |         Status:
                                                 |  reopened
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Major                                |     Resolution:
 Keywords:  tbb-security, tbb-crash, tbb-        |  Actual Points:
  usability-stoppoint-app, fuck-mingw-gcc,       |
  GeorgKoppen201609, TorBrowserTeam201610,       |
  ff52-esr                                       |
Parent ID:  #12820                               |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by bugzilla):

 Replying to [comment:86 gk]:
 > Replying to [comment:85 bugzilla]:
 > > Replying to [comment:84 gk]:
 > > > I think Tor Browser started for all of them (see comment:73,
 comment:75 and I tested it on my machines as well) and it worked with GCC
 6 while it did not without it.
 > > Have you reverted https://hg.mozilla.org/releases/mozilla-
 aurora/rev/7d7176ca2470 to test `IOInterposer`?
 > No.
 > > Have you seen the requirements for invoking `AvailableMemoryTracker`?
 > Yes. Not sure what you want to point out.
 That you didn't make the conditions to properly test for VirtualProtectEx
 calls.
 >
 > No. But what I did was compiling our latest 45.4.0esr code once with GCC
 < 6 and once with GCC 6 and the latter allowed me to run Tor Browser with
 EMET while the former not. *All* other things were equal.
 If EMET can't detect vulnerabilities at startup, it doesn't mean they are
 gone.
 > > TBB freezes with EAF, nothing to discuss.
 >
 > You mean the nightly build I pointed you to? That worked pretty fine for
 me with all the EMET features enabled. Others reported that as well (and I
 assume they had all features enabled, too).
 >
 It's about security, not bells and whistles with shiny checkboxes to
 enable them all. You can't activate some features without entering custom
 values.
 Any app freezes with EAF, even M$ sees it (see
 https://support.microsoft.com/en-us/kb/3175024).
 Here is your nightly (plugin-container.exe):
 {{{
   CodeAddress   : 0x5B387DC7
   CodeStackPtr  : 0x51ECA0
   CalledAddress         : 0x75BF0479
   API name      : kernel32.VirtualProtectEx
   StackPtr      : 0x0051EC20
   FramePtr      : 0x5CCE3324
 }}}
 (You haven't answered why you use debug `-g` on Windows stable.)

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13893#comment:87>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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