Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703, tbb-7.0-must-nightly |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-

Comment (by cypherpunks):

 Replying to [comment:10 mcs]:
 > Replying to [comment:7 cypherpunks]:
 > > Actually, it's an archive in archive, so you need some tricks to
 "decypher" it ;)))
 >
 > You are right. I uploaded the attachment again, but the result is the
 same. Must be a Trac "feature."
 for cypherpunks only ;)

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Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703, tbb-7.0-must-nightly |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-

Comment (by mcs):

 Replying to [comment:7 cypherpunks]:
 > Actually, it's an archive in archive, so you need some tricks to
 "decypher" it ;)))

 You are right. I uploaded the attachment again, but the result is the
 same. Must be a Trac "feature."

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Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703, tbb-7.0-must-nightly |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-

Comment (by cypherpunks):

 Hmm, one spam template can be overcome.

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Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703, tbb-7.0-must-nightly |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-

Comment (by cypherpunks):

 {{{
 Process 26651 stopped
 * thread #1: tid = 0x7801d1, 0x000108aecfa3
 XUL`base::KillProcess(process_id=26709, exit_code=1, wait=false) + 35 at
 process_util_posix.cc:71, queue = 'com.apple.main-thread', stop reason =
 breakpoint 1.2
 frame #0: 0x000108aecfa3 XUL`base::KillProcess(process_id=26709,
 exit_code=1, wait=false) + 35 at process_util_posix.cc:71
68   // entry structure.  Ignores specified exit_code; posix can't
 force that.
69   // Returns true if this is successful, false otherwise.
70   bool KillProcess(ProcessHandle process_id, int exit_code, bool
 wait) {
 -> 71   fprintf(stderr, "\n\nKillProcess %d\n\n", process_id);
72 bool result = kill(process_id, SIGTERM) == 0;
73
74 if (result && wait) {
 }}}

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Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703, tbb-7.0-must-nightly |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-

Comment (by cypherpunks):

 Replying to [comment:6 arthuredelstein]:
 > Replying to [comment:5 mcs]:
 >
 > For some reason I can't open the stack.txt.gz. It unzips but I don't get
 readable text.
 It's an April Fool's day joke ;)
 Trac's preview of gz too :))
 Actually, it's an archive in archive, so you need some tricks to
 "decypher" it ;)))
 Unfortunately, Trac's captcha fails with error when trying to submit this
 call stack in comment, because Tor Browser is broken :(

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Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703, tbb-7.0-must-nightly |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-

Comment (by arthuredelstein):

 Replying to [comment:5 mcs]:

 For some reason I can't open the stack.txt.gz. It unzips but I don't get
 readable text.

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Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703, tbb-7.0-must-nightly |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-

Comment (by mcs):

 Kathy and I tried to debug this problem. The main thing we learned is that
 we are not yet good at understanding e10s-related problems :)

 What we do know is that the main (chrome) process is killing the content
 process (which is associated with the tab where the download is
 initiated). Code inside the KillProcess() function within
 ipc/chromium/src/base/process_util_posix.cc sends a SIGTERM to the content
 process . But why? The key hint seems to be this log message:

  ###!!! [Parent][DispatchAsyncMessage] Error:
 PExternalHelperApp::Msg_DivertToParentUsing Route error: message sent to
 unknown actor ID

 I will attach a call stack that shows how the code gets there, but Kathy
 and I don't know the answer to the really important question: "Why?". Our
 best guess is that we should not be trying to use the prompt service from
 the chrome process at all, but that seems surprising.

 Does anyone know how we can learn more about what APIs can safely be used
 from which kind of process? Or maybe we should just ask some Mozilla
 engineers?

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Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703   |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-

Comment (by arthuredelstein):

 If I comment out the lines
 {{{
 var result = prompts.confirmEx(chrome, title, app+note+suggest+" ",
flags, launch, cancel, "", dontask,
 check);
 }}}
 from `external-app-blocker.js` then there is no crash (and no dialog of
 course).

 I'm not sure why this is crashing, but I have a hunch it is running in the
 child process and wouldn't crash in the parent process.

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Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703   |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-

Comment (by arthuredelstein):

 > Might be related to our external app handler patch.

 I tried reverting our #19273 patch in tor-browser.git and the crash indeed
 went away. So it looks like something in that patch or the torbutton patch
 needs to be changed to be compatible with e10s.

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Re: [tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed whle trying to download a file

[Tor Bug Tracker & Wiki]

#21766: Tor Browser based on ESR52 with e10s enabled crashed whle trying to
download a file
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  Very High|  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Critical | Resolution:
 Keywords:  tbb-7.0-must, ff52-esr,  |  Actual Points:
  TorBrowserTeam201703   |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
 |  Sponsor4
-+-
Changes (by gk):

 * priority:  High => Very High
 * cc: mcs, brade, arthuredelstein (added)
 * severity:  Major => Critical


Comment:

 Oh, and this is reproducible it seems.

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