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

control: reassign -1 xrdp


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
- 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@aurel32.net                 http://www.aurel32.net

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