Bug 38539 – SIGILL in JSC::JSCallbackObject<JSC::JSGlobalObject>::init(JSC::ExecState*) when visiting etherpad

• Component: JavaScriptCore
• Status: RESOLVED WORKSFORME

[René Köcher]

Created attachment 55037 [details]
OSX CrashReporter log

WebKit will crash when visiting an etherpad server with at least one additional person in the same pad.

STEPS TO REPRODUCE:
- browse to a public etherpad server (e.g. doc.etherpad.org)
- create or visit a public pad
- get another person to visit the same pad

EXPECTED BEHAVIOR
- collaborative editing with etherpad

OBSERVED BEHAVIOR
- WebKit will crash

REPRODUCIBLE:
- always

OSX Crash reporter indicates a crash (illegal instruction, SIGILL) in JSC::JSCallbackObject<JSC::JSGlobalObject>::init(JSC::ExecState*).
See the attached log for details.

[René Köcher]

#33717 is a similar bug on PC/Linux but crashing in a different code location.

[Mark Rowe (bdash)]

<rdar://problem/7941684>

[Oliver Hunt]

Do you have any screen readers or anything installed?

[René Köcher]

(In reply to comment #3)
> Do you have any screen readers or anything installed?

No, just plain Safari / WebKit Nightly (reproducible in both versions).

[Oliver Hunt]

Can you include a complete crashlog?  including the various libraries loaded?  I can't reproduce it locally are there any other steps you think maybe necessary?

I'm doing:
1. doc.etherpad.org
2. create a public pad
3. use firefox to open that same pad

i've also tried typing, and setting a user name.  Any other thoughts as to what i might be missing?

[René Köcher]

Created attachment 55051 [details]
Complete crash log including loaded libraries etc.

I added a complete crash log including loaded libraries etc.

This log shows the crash in WebKit Nightly, it seems more vulnerable than the normal Safari (which didn't crash in my lastest tries).

[Oliver Hunt]

Could you try disabling/temporarily removing the end note plugin?

[René Köcher]

(In reply to comment #7)

Yes, the crash seem to be related to the evernote plugin
(I assume this is what you mean by "the end note plugin").

With the enabled evernote plugin I was able to force the crash even after updating to the latest version.
However the crash was gone after removing it.

[Oliver Hunt]

(In reply to comment #8)
> (In reply to comment #7)
> 
> Yes, the crash seem to be related to the evernote plugin
> (I assume this is what you mean by "the end note plugin").
> 
> With the enabled evernote plugin I was able to force the crash even after
> updating to the latest version.
> However the crash was gone after removing it.

Okay cheers, i'll have to look into what the plugin is doing.  Sigh.

/me stabs haxies

[kardan]

this bug just appeared in epiphany 3.4.2 with webkit 2.0.3.

Happened with serveral (mozilla, titanpad, piratenpad) pads and

$ epiphany-browser https://github.com/anything

Program received signal SIGILL, Illegal instruction.
0xa3d4d087 in ?? ()

#0  0xa1bc5fc7 in ?? ()
#1  0xb4fafa19 in JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::JSObject*) ()
   from /usr/lib/libjavascriptcoregtk-3.0.so.0
#2  0xb50a3338 in JSC::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, JSC::JSValue*) ()
   from /usr/lib/libjavascriptcoregtk-3.0.so.0
#3  0xb6376cab in WebCore::ScriptController::evaluateInWorld(WebCore::ScriptSourceCode const&, WebCore::DOMWrapperWorld*) ()
   from /usr/lib/libwebkitgtk-3.0.so.0
#4  0xb63772bb in WebCore::ScriptController::evaluate(WebCore::ScriptSourceCode const&) ()
   from /usr/lib/libwebkitgtk-3.0.so.0
#5  0xb6589374 in WebCore::ScriptElement::executeScript(WebCore::ScriptSourceCode const&) ()
   from /usr/lib/libwebkitgtk-3.0.so.0
#6  0xb676af82 in WebCore::HTMLScriptRunner::executePendingScriptAndDispatchEvent(WebCore::PendingScript&) ()
   from /usr/lib/libwebkitgtk-3.0.so.0
#7  0xb676b594 in WebCore::HTMLScriptRunner::executeParsingBlockingScript() () from /usr/lib/libwebkitgtk-3.0.so.0
#8  0xb676b8a8 in WebCore::HTMLScriptRunner::executeParsingBlockingScripts() () from /usr/lib/libwebkitgtk-3.0.so.0
#9  0xb676b8eb in WebCore::HTMLScriptRunner::executeScriptsWaitingForLoad(WebCore::CachedResource*) ()
   from /usr/lib/libwebkitgtk-3.0.so.0
#10 0xb6756cb6 in WebCore::HTMLDocumentParser::notifyFinished(WebCore::CachedResource*) ()
   from /usr/lib/libwebkitgtk-3.0.so.0
#11 0xb68c7e5b in WebCore::CachedResource::checkNotify() () from /usr/lib/libwebkitgtk-3.0.so.0
#12 0xb68d7499 in WebCore::CachedScript::data(WTF::PassRefPtr<WebCore::ResourceBuffer>, bool) ()
   from /usr/lib/libwebkitgtk-3.0.so.0
#13 0xb693df19 in WebCore::SubresourceLoader::didFinishLoading(double) () from /usr/lib/libwebkitgtk-3.0.so.0
#14 0xb6932247 in WebCore::ResourceLoader::didFinishLoading(WebCore::ResourceHandle*, double) ()
   from /usr/lib/libwebkitgtk-3.0.so.0
#15 0xb7234578 in WebCore::readCallback(_GObject*, _GAsyncResult*, void*) () from /usr/lib/libwebkitgtk-3.0.so.0
#16 0xb57cfd11 in async_ready_callback_wrapper (source_object=0x822ba00, res=0x84c8908, user_data=0xb064c870)
    at /build/glib2.0-Q0IaBZ/glib2.0-2.36.3/./gio/ginputstream.c:530
#17 0xb57f6497 in g_task_return_now (task=task@entry=0x84c8908) at /build/glib2.0-Q0IaBZ/glib2.0-2.36.3/./gio/gtask.c:1105
#18 0xb57f64d1 in complete_in_idle_cb (task=task@entry=0x84c8908) at /build/glib2.0-Q0IaBZ/glib2.0-2.36.3/./gio/gtask.c:1114
#19 0xb555dea0 in g_idle_dispatch (source=source@entry=0x8549ee8, callback=0xb57f64b0 <complete_in_idle_cb>, 
    user_data=0x84c8908) at /build/glib2.0-Q0IaBZ/glib2.0-2.36.3/./glib/gmain.c:5205
#20 0xb5561353 in g_main_dispatch (context=0x8144150, context@entry=0x8168f28)
    at /build/glib2.0-Q0IaBZ/glib2.0-2.36.3/./glib/gmain.c:3054
#21 g_main_context_dispatch (context=context@entry=0x8144150) at /build/glib2.0-Q0IaBZ/glib2.0-2.36.3/./glib/gmain.c:3630
#22 0xb55616f0 in g_main_context_iterate (context=context@entry=0x8144150, block=block@entry=1, dispatch=dispatch@entry=1, 
    self=<optimized out>) at /build/glib2.0-Q0IaBZ/glib2.0-2.36.3/./glib/gmain.c:3701
#23 0xb55617d1 in g_main_context_iteration (context=0x8144150, context@entry=0x0, may_block=may_block@entry=1)
    at /build/glib2.0-Q0IaBZ/glib2.0-2.36.3/./glib/gmain.c:3762
#24 0xb581b00c in g_application_run (application=0x813f928, argc=argc@entry=1, argv=argv@entry=0xbffffb44)
    at /build/glib2.0-Q0IaBZ/glib2.0-2.36.3/./gio/gapplication.c:1623
#25 0x0807059a in main (argc=1, argv=0xbffffb44) at ephy-main.c:483

is this fixed already for 2.1.2?

[kardan]

Same error with webkit 2.1.2, gtk3.0. Please let me know, if you need any further information. Thanks!

[Alexey Proskuryakov]

It doesn't appear that the crash is still happening on Mac. Please feel free to re-open if I am mistaken.

As for Gtk, please file a new bug if you are still seeing a crash with a similar signature. It's not very likely that it's the same thing, after three years.