Author Topic: Avast's aswJsFlt.dll keeps crashing Firefox  (Read 4957 times)

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Offline Weiku

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Avast's aswJsFlt.dll keeps crashing Firefox
« on: February 10, 2018, 01:58:23 AM »
Hello forum,

since about 1 or 2 weeks, my Firefox keeps crashing very often. That Firefox crash is also quite often, but not always, followed by a Windows Bluescreen (always with a different error code). Now when I look at Firefox' crash logs, every single time it says that Avast's aswJsFlt.dll crashed it, as you can see here: http://www.bilder-upload.eu/show.php?file=459271-1518224501.png

What exactly causes this problem? It's incredibly annoying and makes normal PC usage almost impossible. I really hope you can help me.

Offline R. Hansen

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #1 on: February 11, 2018, 06:44:22 AM »
I have a similar problem, but the crashing module is snxhk64.dll. Firefox is fully patched to version 58.0.2. Windows 10 1709 x64 fully patched.

It causes Firefox to fail to start, to spawn blank and broken tabs, and to crash outright in the middle of rendering a page.

I do not have the Firefox Avast add-on installed, and I do not have mail shield installed. Just File Shield, Web Shield, and Behavior Shield.

I'm tracking this problem on Bugzilla, but before I report my findings, I wanted to ping the forums and see if anyone else is having this problem.

https://bugzilla.mozilla.org/show_bug.cgi?id=1420963

Uninstalling Avast and reverting to Windows Defender clears up all the problems listed in that thread. I would really rather use Avast, but Firefox crashes or fails to start so often I will have to leave it uninstalled if I can't fix it.

I have two other machines, a laptop and a desktop, that are running Firefox with Avast and not having any problems. The problem seems to be specific to this one machine.

Any help?
Windows 10 Pro 1709 (16299.371) x64, 16 GB RAM, Core i5-4670, Nvidia GTX 1080 397.31 drivers, Avast 18.3.2333

Offline Weiku

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #2 on: February 11, 2018, 02:06:03 PM »
Yeah, a reply would be nice, don't just leave us alone with this problem :/


@R. Hansen
Do those Firefox crashes caused by Avast also occasionally give you bluescreens or is that just me?
« Last Edit: February 11, 2018, 03:15:10 PM by Weiku »

Offline bob3160

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #3 on: February 11, 2018, 04:30:58 PM »
It's the weekend. I've reported this on the Developers channel.
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Offline R. Hansen

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #4 on: February 11, 2018, 06:22:04 PM »
Yeah, a reply would be nice, don't just leave us alone with this problem :/


@R. Hansen
Do those Firefox crashes caused by Avast also occasionally give you bluescreens or is that just me?

No. I don't get blue screens. I suspect we have different problems. I probably should have started a different thread.

Is it okay if we keep both problems in this thread, or should I start a separate one for my problem?
« Last Edit: February 11, 2018, 06:23:36 PM by R. Hansen »
Windows 10 Pro 1709 (16299.371) x64, 16 GB RAM, Core i5-4670, Nvidia GTX 1080 397.31 drivers, Avast 18.3.2333

Offline R. Hansen

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #5 on: February 11, 2018, 06:46:50 PM »
Windows 10 Pro 1709 (16299.371) x64, 16 GB RAM, Core i5-4670, Nvidia GTX 1080 397.31 drivers, Avast 18.3.2333

Offline kwiq

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #6 on: February 11, 2018, 06:49:40 PM »
Hello can you provide us a dump of firefox.exe ?

1) Download procdump tools from : https://docs.microsoft.com/en-us/sysinternals/downloads/procdump
2) Register procdump as post mortem debugger :  procdump -ma -i c:\dumps     
3) Try to induce the crash
4) There should be a new dump of firefox in c:\dumps folder (you can set another folder)

System BSOD mini dump should be stored at :
%SystemRoot%\MEMORY.DMP

Please provide us with both dump files to analyze the issue.
Thank you
 

Offline bob3160

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #7 on: February 11, 2018, 07:01:50 PM »
Hello can you provide us a dump of firefox.exe ?

1) Download procdump tools from : https://docs.microsoft.com/en-us/sysinternals/downloads/procdump
2) Register procdump as post mortem debugger :  procdump -ma -i c:\dumps     
3) Try to induce the crash
4) There should be a new dump of firefox in c:\dumps folder (you can set another folder)

System BSOD mini dump should be stored at :
%SystemRoot%\MEMORY.DMP

Please provide us with both dump files to analyze the issue.
Thank you
 
@ kwiq,
Your email address doesn't list you as an Avast employee ???
Free avast! Security Seminar: http://bit.ly/2N1eaR2  -  Important: http://www.organdonor.gov/ -- My Web Site: http://bob3160.strikingly.com/ - Win 11 Pro v21H2 64bit, 16 Gig Ram, 1TB SSD, AvastOmni 21.6, How to Successfully Install Avast http://goo.gl/VLXdeRepair & Clean Install https://goo.gl/t7aJGq

Offline kwiq

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #8 on: February 11, 2018, 07:26:48 PM »
Hello Weiku
I tried to decode the stack from attached image which points to aswjsflt.dll :

ntdl!tWaitForMultipleObjects
KERNELBASE.dllRtlAnsiStringToUnicodeString
kernel32.dllWaitForMultipleObjects
aswJsFlt.dll@0x2bb36 aswJsFlt64!WaitForAnyConnection
aswJsFlt.dll@0x2c21e aswJsFlt64!PipeServerThreadProcedureImpl

this thread is waiting in waitformultipleobjects and cant cause any issue.

To confirm that aswjsflt.dll  causes the crash please close all instances of firefo, disable avast self protection for a while and rename aswjsflt.dll to aswjsflt.dll.org
the file should be stored at "c:\Program Files\AVAST Software\Avast\x64\aswJsFlt.dll".
Start new firefox instance

Thank you.




Offline bob3160

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #9 on: February 11, 2018, 07:31:00 PM »
Hello Weiku
I tried to decode the stack from attached image which points to aswjsflt.dll :

ntdl!tWaitForMultipleObjects
KERNELBASE.dllRtlAnsiStringToUnicodeString
kernel32.dllWaitForMultipleObjects
aswJsFlt.dll@0x2bb36 aswJsFlt64!WaitForAnyConnection
aswJsFlt.dll@0x2c21e aswJsFlt64!PipeServerThreadProcedureImpl

this thread is waiting in waitformultipleobjects and cant cause any issue.

To confirm that aswjsflt.dll  causes the crash please close all instances of firefo, disable avast self protection for a while and rename aswjsflt.dll to aswjsflt.dll.org
the file should be stored at "c:\Program Files\AVAST Software\Avast\x64\aswJsFlt.dll".
Start new firefox instance

Thank you.
To keep the customer safe, a reply to my question would be nice. :)
Free avast! Security Seminar: http://bit.ly/2N1eaR2  -  Important: http://www.organdonor.gov/ -- My Web Site: http://bob3160.strikingly.com/ - Win 11 Pro v21H2 64bit, 16 Gig Ram, 1TB SSD, AvastOmni 21.6, How to Successfully Install Avast http://goo.gl/VLXdeRepair & Clean Install https://goo.gl/t7aJGq

Offline R. Hansen

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #10 on: February 11, 2018, 09:43:51 PM »
I'm breaking my problem out to a second thread. It's definitely a different issue. Good luck resolving your issue.
Windows 10 Pro 1709 (16299.371) x64, 16 GB RAM, Core i5-4670, Nvidia GTX 1080 397.31 drivers, Avast 18.3.2333

Offline Weiku

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #11 on: February 12, 2018, 02:13:55 AM »
@kwiq
Who the hell are you? You're clearly not from Avast, stop asking for my dumps, or for anything, you creep.

Offline kwiq

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #12 on: February 12, 2018, 08:41:44 AM »
Hello,
believe or not i'm avast's employee. I will ask forum moderators to add me to avast group.   

The reason why you see avasts dll marked as red is because during crash mozzila takes a dump of the browser process and displays all threads with stacks and unknown libraries are marked with red color !
That is why you see aswjsflt and snx - but they didnt cause the crash. The crash occured it thread  0 with stack :

js::XDRAtom<1>(js::XDRState<1> *,JS::MutableHandle<JSAtom *>)
js::XDRScript<1>(js::XDRState<1> *,JS::Handle<js::Scope *>,JS::Handle<js::ScriptSourceObject *>,JS::Handle<JSFunction *>,JS::MutableHandle<JSScript *>)
js::XDRInterpretedFunction<1>(js::XDRState<1> *,JS::Handle<js::Scope *>,JS::Handle<js::ScriptSourceObject *>,JS::MutableHandle<JSFunction *>)
js::XDRScript<1>(js::XDRState<1> *,JS::Handle<js::Scope *>,JS::Handle<js::ScriptSourceObject *>,JS::Handle<JSFunction *>,JS::MutableHandle<JSScript *>)
js::XDRState<1>::codeScript(JS::MutableHandle<JSScript *>)
js::MultiScriptsDecodeTask::parse(JSContext *)
js::HelperThread::handleParseWorkload(js::AutoLockHelperThreadState &)
js::detail::ThreadTrampoline<void (&)(void *),js::HelperThread *>::Start(void *)

To confirm it please send us dumps and  try to rename aswjsflt.dll for a while - it might help.
There is avast ftp server where you can upload dump files for analysis. (ftp://ftp.avast.com/incoming ) Zip all your data into aswJsFlt_keeps_crashing_firefox_12_02_2018.zip and  upload them.
Thank you





 
« Last Edit: February 12, 2018, 08:51:41 AM by kwiq »

Offline Asyn

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #13 on: February 12, 2018, 08:50:57 AM »
@Weiku: kwiq is OK, you can trust him. :)

PS: You can upload your minidump(s) here: ftp://ftp.avast.com/incoming/
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Offline bob3160

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Re: Avast's aswJsFlt.dll keeps crashing Firefox
« Reply #14 on: February 12, 2018, 01:44:26 PM »
Thanks kwiq,
Verified. :)
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