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Groups > linux.debian.security > #5070

RE: Userdata stays in RAM after Logout and Relogin

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________________________________________
> From: herve [herve@couvelard.com]
> Sent: Friday, November 04, 2016 9:26 AM
> To: debian-security@lists.debian.org
> Subject: Re: Userdata stays in RAM after Logout and Relogin
> 
> On 04/11/2016 17:01, H. N. wrote:
> > Hello,
> >
> > Sometimes it occurs, that the background Image of my desktop of is
> > somehow corrupted.
<snip>
> > I wonder that the RAM used by the user isn't cleared after logout.
> >
> > My System:
> > Debian 8, Gnome Desktop currently used.
> > No major system modifications done
> >
> > I MIGHT NOT BE IN SECURITY MAILING LIST (I DON'T KNOW, HAD A FEW
> > PROBLEMS HERE), SO PLEASE SEND RESPONSE-EMAILS DIRECTLY TO
> > deb_mailinglist@niemeczek.at TOO.
> >
> Ram or graphic ram ?
> could be a bug in the video driver ?
> 
> hervé

That's what I assumed when I read it: video driver bug.
It might also be a hardware issue, where graphic RAM is not
cleared on reset.  Or given the nature of video devices, perhaps a
combination of the two: a driver bug that expects certain generic
behavior combined with a device that expects a custom, proprietary,
vendor-provided driver to work correctly.

I have no idea whether H.N.'s system uses it, but I guess that
the USB graphic devices (DisplayLink et.al.) are probably prone
to this kind of issue, both on the displays that they connect to
and to the other displays on the primary graphics device.

Enjoy!

-- radzy

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Re: Userdata stays in RAM after Logout and Relogin herve <herve@couvelard.com> - 2016-11-04 17:40 +0100
  RE: Userdata stays in RAM after Logout and Relogin "Radzykewycz, T (Radzy)" <radzy@windriver.com> - 2016-11-04 20:30 +0100
    Re: Userdata stays in RAM after Logout and Relogin Felix Knecht <debian@felixknecht.de> - 2016-11-04 23:40 +0100
    Re: Userdata stays in RAM after Logout and Relogin "H. N." <deb_mailinglist@niemeczek.at> - 2016-11-05 01:20 +0100
      Re: Userdata stays in RAM after Logout and Relogin Gunnar Wolf <gwolf@debian.org> - 2016-11-06 01:00 +0100
        Re: Userdata stays in RAM after Logout and Relogin "H. N." <deb_mailinglist@niemeczek.at> - 2016-11-06 10:40 +0100

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