Re: [qubes-users] Firefox profile seems to leak between DispVMs

2016-07-26 Thread Andrew David Wong
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA512

On 2016-06-18 14:54, IX4 Svs wrote:
> Qubes R3.1, Fedora 23 template, fully updated.
> 
> I launch a new disposable Firefox, which creates a new DispVM and
> displays [disp42] in the Firefox window title. All normal so far.
> 
> I hit CTRL+t to open a new Firefox tab and - I can't believe my
> eyes - the "new tab" page is full of thumbnails of web pages I have
> visited in other DispVMs, which have long been shut down.
> 
> sudo xl list from dom0 confirms disp42 is the only DispVM currently
> running.
> 
> How can such data leakage from one DispVM to another be possible?
> Yes, I am adamant, 100% certain that I have not visited the web
> sites showing up in the "new tab" page from the TemplateVM that my
> DispVM is based upon.
> 
> Any thoughts?
> 
> Thanks,
> 
> Alex
> 

This issue is now being tracked here:

https://github.com/QubesOS/qubes-issues/issues/2200

- -- 
Andrew David Wong (Axon)
Community Manager, Qubes OS
https://www.qubes-os.org
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Re: [qubes-users] Firefox profile seems to leak between DispVMs

2016-06-21 Thread Alex
On 20 June 2016 18:28:49 BST, Andrew David Wong  wrote:
>-BEGIN PGP SIGNED MESSAGE-
>Hash: SHA512
>
>On 2016-06-19 12:30, IX4 Svs wrote:
>> On Sun, Jun 19, 2016 at 3:05 PM, Andrew David Wong 
>>  wrote:
>> 
>> On 2016-06-18 14:54, IX4 Svs wrote:
> Qubes R3.1, Fedora 23 template, fully updated.
> 
> I launch a new disposable Firefox, which creates a new DispVM
> and displays [disp42] in the Firefox window title. All normal
> so far.
> 
> I hit CTRL+t to open a new Firefox tab and - I can't believe
>  my eyes - the "new tab" page is full of thumbnails of web 
> pages I have visited in other DispVMs, which have long been 
> shut down.
> 
> sudo xl list from dom0 confirms disp42 is the only DispVM 
> currently running.
> 
> How can such data leakage from one DispVM to another be 
> possible? Yes, I am adamant, 100% certain that I have not 
> visited the web sites showing up in the "new tab" page from 
> the TemplateVM that my DispVM is based upon.
> 
> Any thoughts?
> 
> Thanks,
> 
> Alex
> 
>>> 
>>> Does it persist even after you regenerate the DVM template?
>>> 
>>> $ qvm-create-default-dvm --default-template
>> 
>> I have not tried the nuclear option - I was hoping to find the 
>> cause of such a massive leak now that it's happening so that it can
>> be fixed for all Qubes users.
>
>Sorry, I wasn't thinking of that as "the nuclear option." Rather, I
>was just trying to help determine whether this phenomenon is isolated
>to your specific machine (e.g., perhaps you forgot that you had done
>some special configuration that would be overwritten when regenerating
>the DVM template) or whether it's a Qubes bug.
>
>Personally, I haven't been able to reproduce this on my own machine
>(and I haven't seen anyone else say they can either), so it's not yet
>clear whether this affects any other Qubes users. If the phenomenon
>were to persist even after you regenerate the DVM template, that would
>be significantly more worrisome, since you said you're absolutely sure
>you didn't do anything in the TemplateVM on which the DVM template is
>based that might cause this.
>
>I've never tried backing up the DVM template (since there's usually no
>reason to do so), but I wonder if doing so would allow you to preserve
>the current state so that you can try regenerating the template.
>
>- -- 
>Andrew David Wong (Axon)
>Community Manager, Qubes OS
>https://www.qubes-os.org
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I installed the latest fedora-23 updates, which refreshed my DispVM savefile- 
the behavior is now back to normal. 

I unfortunately did not think to capture the old state so that it can be 
studied to understand the set of conditions that led to this unexpected 
persistence.

If there are any logs I can provide to understand what happened I'll be happy 
to dig them out. 

Thanks

Alex 

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Re: [qubes-users] Firefox profile seems to leak between DispVMs

2016-06-20 Thread Andrew David Wong
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On 2016-06-20 06:23, raahe...@gmail.com wrote:
> I have had an issue on mutliple machines (which other users have 
> noted in multiple threads)  where the dispvm browser is unable to 
> load due to the profile mysteriously being missing. I wish a dev 
> would address this.  The solution is indeed to recreate the
> default dvm, but there must be a reason for this happening.  I
> wonder if its related to the issue in this thread.
> 

Thanks for the reports. Tracking here:

https://github.com/QubesOS/qubes-issues/issues/2091

- -- 
Andrew David Wong (Axon)
Community Manager, Qubes OS
https://www.qubes-os.org
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Re: [qubes-users] Firefox profile seems to leak between DispVMs

2016-06-20 Thread Andrew David Wong
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA512

On 2016-06-19 12:30, IX4 Svs wrote:
> On Sun, Jun 19, 2016 at 3:05 PM, Andrew David Wong 
>  wrote:
> 
> On 2016-06-18 14:54, IX4 Svs wrote:
 Qubes R3.1, Fedora 23 template, fully updated.
 
 I launch a new disposable Firefox, which creates a new DispVM
 and displays [disp42] in the Firefox window title. All normal
 so far.
 
 I hit CTRL+t to open a new Firefox tab and - I can't believe
  my eyes - the "new tab" page is full of thumbnails of web 
 pages I have visited in other DispVMs, which have long been 
 shut down.
 
 sudo xl list from dom0 confirms disp42 is the only DispVM 
 currently running.
 
 How can such data leakage from one DispVM to another be 
 possible? Yes, I am adamant, 100% certain that I have not 
 visited the web sites showing up in the "new tab" page from 
 the TemplateVM that my DispVM is based upon.
 
 Any thoughts?
 
 Thanks,
 
 Alex
 
>> 
>> Does it persist even after you regenerate the DVM template?
>> 
>> $ qvm-create-default-dvm --default-template
> 
> I have not tried the nuclear option - I was hoping to find the 
> cause of such a massive leak now that it's happening so that it can
> be fixed for all Qubes users.

Sorry, I wasn't thinking of that as "the nuclear option." Rather, I
was just trying to help determine whether this phenomenon is isolated
to your specific machine (e.g., perhaps you forgot that you had done
some special configuration that would be overwritten when regenerating
the DVM template) or whether it's a Qubes bug.

Personally, I haven't been able to reproduce this on my own machine
(and I haven't seen anyone else say they can either), so it's not yet
clear whether this affects any other Qubes users. If the phenomenon
were to persist even after you regenerate the DVM template, that would
be significantly more worrisome, since you said you're absolutely sure
you didn't do anything in the TemplateVM on which the DVM template is
based that might cause this.

I've never tried backing up the DVM template (since there's usually no
reason to do so), but I wonder if doing so would allow you to preserve
the current state so that you can try regenerating the template.

- -- 
Andrew David Wong (Axon)
Community Manager, Qubes OS
https://www.qubes-os.org
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Re: [qubes-users] Firefox profile seems to leak between DispVMs

2016-06-19 Thread IX4 Svs
On Sun, Jun 19, 2016 at 3:05 PM, Andrew David Wong  wrote:

> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA512
>
> On 2016-06-18 14:54, IX4 Svs wrote:
> > Qubes R3.1, Fedora 23 template, fully updated.
> >
> > I launch a new disposable Firefox, which creates a new DispVM and
> > displays [disp42] in the Firefox window title. All normal so far.
> >
> > I hit CTRL+t to open a new Firefox tab and - I can't believe my
> > eyes - the "new tab" page is full of thumbnails of web pages I have
> > visited in other DispVMs, which have long been shut down.
> >
> > sudo xl list from dom0 confirms disp42 is the only DispVM currently
> > running.
> >
> > How can such data leakage from one DispVM to another be possible?
> > Yes, I am adamant, 100% certain that I have not visited the web
> > sites showing up in the "new tab" page from the TemplateVM that my
> > DispVM is based upon.
> >
> > Any thoughts?
> >
> > Thanks,
> >
> > Alex
> >
>
> Does it persist even after you regenerate the DVM template?
>
> $ qvm-create-default-dvm --default-template
>
> - --
> Andrew David Wong (Axon)
> Community Manager, Qubes OS
> https://www.qubes-os.org
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>
I have not tried the nuclear option - I was hoping to find the cause of
such a massive leak now that it's happening so that it can be fixed for all
Qubes users. What logs would I need to look into? Should I start a DispVM
in debug mode from dom0's terminal and look at the console output?
/var/log/xen/console/guest-disp43.log interestingly says:

[   18.935022] xen:grant_table: Grant tables using version 1 layout
[   18.935022] Using NULL legacy PIC
[   18.935022] PM: noirq restore of devices complete after 0.071 msecs
[   18.935022] PM: early restore of devices complete after 0.040 msecs
[   18.962927] PM: restore of devices complete after 24.821 msecs
[   18.962977] Restarting tasks ... done.
[   19.046997] Setting capacity to 20971520
[   19.260713] EXT4-fs error (device dm-0): ext4_mb_generate_buddy:757:
group 49, block bitmap and bg descriptor inconsistent: 2 vs 1 free clusters
[   19.260915] EXT4-fs error (device dm-0): ext4_mb_generate_buddy:757:
group 50, block bitmap and bg descriptor inconsistent: 1611 vs 1612 free
clusters
[   19.261198] JBD2: Spotted dirty metadata buffer (dev = dm-0, blocknr =
0). There's a risk of filesystem corruption in case of system crash.
[   19.648563] EXT4-fs error (device dm-0): ext4_lookup:1588: inode #927:
comm cupsd: deleted inode referenced: 647
[   50.944638] EXT4-fs error (device dm-0): ext4_lookup:1588: inode #927:
comm cupsd: deleted inode referenced: 647
[  308.780561] EXT4-fs error (device dm-0): ext4_lookup:1588: inode
#524291: comm dnf: deleted inode referenced: 524305

..but I can't think of how filesystem corruption would lead to data leaking
between DispVMs.

Alex

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Re: [qubes-users] Firefox profile seems to leak between DispVMs

2016-06-19 Thread Andrew David Wong
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA512

On 2016-06-18 14:54, IX4 Svs wrote:
> Qubes R3.1, Fedora 23 template, fully updated.
> 
> I launch a new disposable Firefox, which creates a new DispVM and
> displays [disp42] in the Firefox window title. All normal so far.
> 
> I hit CTRL+t to open a new Firefox tab and - I can't believe my
> eyes - the "new tab" page is full of thumbnails of web pages I have
> visited in other DispVMs, which have long been shut down.
> 
> sudo xl list from dom0 confirms disp42 is the only DispVM currently
> running.
> 
> How can such data leakage from one DispVM to another be possible?
> Yes, I am adamant, 100% certain that I have not visited the web
> sites showing up in the "new tab" page from the TemplateVM that my
> DispVM is based upon.
> 
> Any thoughts?
> 
> Thanks,
> 
> Alex
> 

Does it persist even after you regenerate the DVM template?

$ qvm-create-default-dvm --default-template

- -- 
Andrew David Wong (Axon)
Community Manager, Qubes OS
https://www.qubes-os.org
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[qubes-users] Firefox profile seems to leak between DispVMs

2016-06-18 Thread IX4 Svs
Qubes R3.1, Fedora 23 template, fully updated.

I launch a new disposable Firefox, which creates a new DispVM and displays
[disp42] in the Firefox window title. All normal so far.

I hit CTRL+t to open a new Firefox tab and - I can't believe my eyes - the
"new tab" page is full of thumbnails of web pages I have visited in other
DispVMs, which have long been shut down.

sudo xl list from dom0 confirms disp42 is the only DispVM currently running.

How can such data leakage from one DispVM to another be possible? Yes, I am
adamant, 100% certain that I have not visited the web sites showing up in
the "new tab" page from the TemplateVM that my DispVM is based upon.

Any thoughts?

Thanks,

Alex

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