Guacamole v1.3.0 + FreeRDP v2.0.0 (Debian 10)

[LuKaRo]

Hi everyone,

I have to get back onto that FreeRDP issue that already got mentioned in the "Build 1.3.0 on Debian9" thread - although in my case, it's Debian 10. I just upgraded Guacamole from v1.2.0 to v1.3.0, and I had to add the "--enable-allow-freerdp-snapshots" to "./configure" as I got the following message without that flag:

  --------------------------------------------
   You are building against a development version of FreeRDP. Non-release
   versions of FreeRDP may have differences in behavior that are impossible to
   check for at build time. This may result in memory leaks or other strange
   behavior.

   *** PLEASE USE A RELEASED VERSION OF FREERDP IF POSSIBLE ***

   If you are ABSOLUTELY CERTAIN that building against this version of FreeRDP
   is OK, rerun configure with the --enable-allow-freerdp-snapshots
  --------------------------------------------

However, I'm using the version of FreeRDP that is provided by Debian Buster repositories:

freerdp2-dev/stable,stable,now 2.0.0~git20190204.1.2693389a+dfsg1-1+deb10u2 amd64

I am pretty sure that I didn't need to use this flag when building v1.2.0, as I'm using my own Ansible playbook for Guacamole, and it failed for v1.3.0, but not for v1.2.0. When building v1.2.0, I already used the same version of FreeRDP, as I checked the apt logs.

Why do I get a warning about an unreleased FreeRDP version? As the FreeRDP version I use is provided by Debian stable, I suppose it's a released version, isn't it? Or is it recommended to use a different version of FreeRDP?

Thanks to anyone who can shed some light on this matter :) And thanks, again, for all the work put in Apache Guacamole. Awesome software.

Cheers,
LuKaRo

[Евгений Н. Жуков]

In Debian 10 with freerdp from repo all works fine. Also you can download freerdp from official site and build them or install freerdp repo and get already compiled binaries.

Сб, 9 янв. 2021 г. в 02:18, LuKaRo <[hidden email]>:

Hi everyone,

I have to get back onto that FreeRDP issue that already got mentioned in the "Build 1.3.0 on Debian9" thread - although in my case, it's Debian 10. I just upgraded Guacamole from v1.2.0 to v1.3.0, and I had to add the "--enable-allow-freerdp-snapshots" to "./configure" as I got the following message without that flag:

  --------------------------------------------
   You are building against a development version of FreeRDP. Non-release
   versions of FreeRDP may have differences in behavior that are impossible to
   check for at build time. This may result in memory leaks or other strange
   behavior.

   *** PLEASE USE A RELEASED VERSION OF FREERDP IF POSSIBLE ***

   If you are ABSOLUTELY CERTAIN that building against this version of FreeRDP
   is OK, rerun configure with the --enable-allow-freerdp-snapshots
  --------------------------------------------

However, I'm using the version of FreeRDP that is provided by Debian Buster repositories:

freerdp2-dev/stable,stable,now 2.0.0~git20190204.1.2693389a+dfsg1-1+deb10u2 amd64

I am pretty sure that I didn't need to use this flag when building v1.2.0, as I'm using my own Ansible playbook for Guacamole, and it failed for v1.3.0, but not for v1.2.0. When building v1.2.0, I already used the same version of FreeRDP, as I checked the apt logs.

Why do I get a warning about an unreleased FreeRDP version? As the FreeRDP version I use is provided by Debian stable, I suppose it's a released version, isn't it? Or is it recommended to use a different version of FreeRDP?

Thanks to anyone who can shed some light on this matter :) And thanks, again, for all the work put in Apache Guacamole. Awesome software.

Cheers,
LuKaRo

--

[LuKaRo]

On 09.01.21 00:45, Евгений Н. Жуков wrote:
> In Debian 10 with freerdp from repo all works fine. Also you can download freerdp from official site and build them or install freerdp repo and get already compiled binaries.
Yeah, I also noticed that it works despite the warning. However, I don't just want to skip this warning on a production server, I want to find out at least the cause for it. Therefore I was wondering why I even got this warning in the first place.

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[vnick]

On Fri, Jan 8, 2021 at 7:10 PM LuKaRo <[hidden email]> wrote:

On 09.01.21 00:45, Евгений Н. Жуков wrote:
> In Debian 10 with freerdp from repo all works fine. Also you can download freerdp from official site and build them or install freerdp repo and get already compiled binaries.
Yeah, I also noticed that it works despite the warning. However, I don't just want to skip this warning on a production server, I want to find out at least the cause for it. Therefore I was wondering why I even got this warning in the first place.

The warning was added as part of GUACAMOLE-1181 (https://issues.apache.org/jira/browse/GUACAMOLE-1181) due to issues introduced by various FreeRDP interim builds. Due to the seriousness of these issues, GUACAMOLE-1241 (https://issues.apache.org/jira/browse/GUACAMOLE-1241) changed this from just a warning to an error that has to be manually overridden.

https://github.com/apache/guacamole-server/pull/306

https://github.com/apache/guacamole-server/pull/319

-Nick

[Charaoui, Jérôme]

Le 2021-01-08 à 18 h 18, LuKaRo a écrit :
> Why do I get a warning about an unreleased FreeRDP version? As the
> FreeRDP version I use is provided by Debian stable, I suppose it's a
> released version, isn't it? Or is it recommended to use a different
> version of FreeRDP?

At the time Debian 10 (buster) was released, FreeRDP 2 was still in the
release-candidate stage.

The maintainers probably felt that not including FreeRDP 2 at all would
be worse than a pre-release version so that's what went into the Debian
release at the time.

The solution in this case is to simply enable the backports repository
and install freerdp2-dev version 2.2.0 from there.

Guacamole builds fine with it.

--
Jérôme Charaoui
Technicien en informatique
Collège de Maisonneuve


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[vnick]

On Fri, Jan 8, 2021 at 9:02 PM Jérôme Charaoui <[hidden email]> wrote:

Le 2021-01-08 à 18 h 18, LuKaRo a écrit :
> Why do I get a warning about an unreleased FreeRDP version? As the
> FreeRDP version I use is provided by Debian stable, I suppose it's a
> released version, isn't it? Or is it recommended to use a different
> version of FreeRDP?

At the time Debian 10 (buster) was released, FreeRDP 2 was still in the
release-candidate stage.

The maintainers probably felt that not including FreeRDP 2 at all would
be worse than a pre-release version so that's what went into the Debian
release at the time.

The solution in this case is to simply enable the backports repository
and install freerdp2-dev version 2.2.0 from there.

Guacamole builds fine with it.

Yep, and this is pretty much what we're doing with the guacd Docker image.

-Nick

[LuKaRo]

On 09.01.21 03:02, Jérôme Charaoui wrote:

> At the time Debian 10 (buster) was released, FreeRDP 2 was still in the
> release-candidate stage.
>
> The maintainers probably felt that not including FreeRDP 2 at all would
> be worse than a pre-release version so that's what went into the Debian
> release at the time.
>
> The solution in this case is to simply enable the backports repository
> and install freerdp2-dev version 2.2.0 from there.
>
> Guacamole builds fine with it.

Thanks a lot, I'll give that a try!

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[LuKaRo]

On 09.01.21 03:13, LuKaRo wrote:

> On 09.01.21 03:02, Jérôme Charaoui wrote:
>> At the time Debian 10 (buster) was released, FreeRDP 2 was still in the
>> release-candidate stage.
>>
>> The maintainers probably felt that not including FreeRDP 2 at all would
>> be worse than a pre-release version so that's what went into the Debian
>> release at the time.
>>
>> The solution in this case is to simply enable the backports repository
>> and install freerdp2-dev version 2.2.0 from there.
>>
>> Guacamole builds fine with it.
> Thanks a lot, I'll give that a try!

I actually got the information today that RDP connections indeed no longer work after the update. When I checked journalctl for guacd logs, I noticed the exact same "double free" issues that got mentioned here earlier. So I enabled the Debian Backports repository in my ansible role and installed freeRDP from it, and now it works again. I didn't even need to rebuild the server, so maybe updating the dynamically linked libraries was enough?

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