Bluescreen when trying to save file to mounted network share

[Tomcat86]

Hi,

every time I try to save a file to a mounted network share (mounted to X:) my computer crashes (bluescreen) and reports a kmode_exception_not_handled caused by mrxsmb20.sys. All sandboxed programs show the same behavior (Firefox, PDF X Change). I even tried using a different machine, but ended up with the same error.

The interesting thing is that if I try to save the same file using the network path (//server/share/path/to/file) everything works fine and Sandboxie asks to recover the file which works as well.

In the sandbox settings I added both paths (X: and the //server/share...) to the quick recovery list. I also unchecked the setting to block network files and folders.

Operating System: Windows 10 Professional
Sandboxie: Version 5.20 64bit

I would greatly appreciate some help with this

Tomcat

[Barb@Invincea]

Hi Tomcat86,

I found a previous thread reporting a similar issue, but no updates since:
viewtopic.php?f=11&t=18471&p=99592&hili ... sys#p99592

What are the exact steps that you are following to reproduce the problem? (Please provide all the steps so that I can test it, including how you are sharing the drive (you can use a test example) ).

Can you please provide a dump file so that we can review it?

Regards,
Barb.-

[Tomcat86]

Hi Barb,

thank you very much for your message. I wanted to create a short screencast to show you the steps I make when the computer crashes. Doing so, I probably found my mistake. In the sandbox settings I enabled quick recovery for the path of the itself (\\mars\daten) and drive X:

2017-08-10_15h38_16.png (20.5 KiB) Viewed 1901 times

But the network share mapped to X: was not \\mars\daten but \\192.168.0.1\daten (without using dns name translation):

2017-08-10_15h40_54.png (54.09 KiB) Viewed 1901 times

After I added the path \\192\168.0.1\daten to the quick recovery settings, everything works fine.

Hopefully this post will help users with the same problem. In case want to further investigate this issue, I can also send you the minidump and the screencast using the "wrong" configuration.

Thanks again for your support.

Regards,
Tom



--------------------------MERGED POST -----------------------------------------
Hi Barb,

sorry to say, but after a reboot the described fixed doesn't work any longer. It seems that if I save a file once using the full path to the server (//mars/daten) it also works using the mapped drive (x:) afterwards. But after cleaning the sandbox it will not work any longer.

I created a screencast to show the steps that lead to the bluescreen and also saved the minidump file. As I can't upload these files here, is there another way I can send them to you?

Thanks in advance.

Regards,
Tom

[Barb@Invincea]

Hello Tomcat86,

Does the issue occur if you previously access the drive from outside Sandboxie?

Regarding the dump file and the screencast, you can upload it to a free hosting website and provide the link. (If you do not want to post the link here, you can send it to support@sandboxie.com)

Regards,
Barb.-

[Tomcat86]

Hi Barb,

the issue occurs in both cases (with and without previous access to the drive from outside the sandbox). I checked this as well.

I will send you the link to both via email.

Thanks a lot.

Regards,
Tom

[Barb@Invincea]

Hello Tomcat86,

I created a network location on a Win 10 computer, then used a VM with SBIE to save files to it (using Quick Recovery) and did not encounter any issues.
Is "Block network files and folders..." selected under Sandbox Settings --> Restrictions --> Network Files ?

I have sent the BSOD dump to the devs, I will post an update after they get a chance to review it.

Regards,
Barb.-

[Tomcat86]

Hello Barb,

I tried to create another network location on a Win 10 computer as well and can confirm that no issues occur saving files to this location. The other network drives are hosted by a linux machine using Samba (version 4). Probably this is a part of the issue?

"Block network files and folders..." is not checked.

Thanks again.

Regards,
Tom