Bug#879093: Segfault in libc6 while using xrdp-sesman on Stretch

[Gilles MOREL]

Hello,

Actually, I was wrong, the xrdp version is not the same between jessie-backports and stretch, so it could be a bug from the stretch version.

For the moment, I use the stretch-backports version, but I must install it manually since libapt (in Python3) does not allow installation from backports (well, exactly, I can't find yet a simple way to do this).
--
Gilles Émilien MOREL <contact at gilles-morel.fr>
« On dit que pétrir, c'est modeler, moi je dis que péter, c'est démolir. » -- Mc Salò

----- Message original ----------------
Aurelien Jarno <aurelien at aurel32.net>
à Gilles MOREL <contact at gilles-morel.fr>, 879093 at bugs.debian.org
le jeudi 07 décembre 2017 à 22:47:49 +0100
avec Mutt/1.9.1 (2017-09-22)

Re: Bug#879093: Segfault in libc6 while using xrdp-sesman on Stretch
---------------------------------------------------
control: reassign -1 xrdp

Hi,

On 2017-10-19 11:38, Gilles MOREL wrote:
> Package: libc6
> Version: 2.24-11+deb9u1
> 
> I installed xrdp on one of my servers on Debian Stretch. Some users connect to these desktops.
> When I have at least two connected users, when one of them close the session, this happens in the kernel log :
> xrdp-sesman[1006]: segfault at 0 ip 00007f1c4e6aa646 sp 00007ffc0ce9f918 error 4 in libc-2.24.so[7f1c4e62a000+195000]

This points to the strlen function. It's obviously called with a wrong
argument, as otherwise many other things would be broken.


On 2017-10-24 15:52, Gilles MOREL wrote:
> Actually, I don't think that the problem comes from xrdp-sesman because the one I used on Jessie (from jessie-backports) is the same as the one I use on Stretch. For me, only the libc6 version changed, but I can be wrong about it…

It's the same version of xrdp-sesman, but the following librairies
changed:
- libc6 (as you said)
- libpam0g
- libaudit1
- libcap-ng

I therefore really believe it's a bug in xrdp-sesman, probably triggered
by a change of one of the libraries it depends on. I am therefore
reassigning the bug to xrdp.

Note that there is a backport available for Stretch, it might be worth
trying it.

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien at aurel32.net                 http://www.aurel32.net
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