[Gluster-users] SAMBA VFS module for GlusterFS crashes

[Anoop C S]

On Wed, 2017-12-06 at 14:57 +0100, Riccardo Murri wrote:
> Dear Anoop,
> 
> thank you very much for your detailed explanation.
> 
> > I think you are hitting a bug[1] from vfs module for GlusterFS inside Samba during a realpath()
> > call.
> > 
> > This regression got in when glfs_realpath() was modified in GlusterFS[2] to correctly handle
> > memory
> > allocation and corresponding freeing of string arguments. And this particular change is present
> > from
> >  GlusterFS version 3.7.17 in 3.7 series, in 3.9 series and all above versions (but not present
> > in
> > 3.8 series).
> > 
> > So if you are using any of the above mentioned GlusterFS versions(which contains the above
> > change
> > for glfs_realpath()), then you are recommended to install Samba version >= 4.4.9 in 4.4 series,
> > >=
> > 4.5.2 or any versions from higher series like 4.6, 4.7 etc which contains the fix for this
> > crash.
> 
> I'm using GlusterFS 3.12.3 from the GlusterFS Ubuntu PPA [1]::
> 
>     $ apt-cache policy glusterfs-client
>     glusterfs-client:
>       Installed: 3.12.3-ubuntu1~xenial1
>       Candidate: 3.12.3-ubuntu1~xenial1
>       Version table:
>      *** 3.12.3-ubuntu1~xenial1 500
>             500 http://ppa.launchpad.net/gluster/glusterfs-3.12/ubuntu xenial/main amd64 Packages
>             100 /var/lib/dpkg/status
>          3.7.6-1ubuntu1 500
>             500 http://nova.clouds.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
>             500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
> 
> So this should contain the fix already?  Or is the fix Samba-side?

Yes. The fix needs to be present in Samba. Please update your Samba version as I replied above.

> [1] https://launchpad.net/~gluster/+archive/ubuntu/glusterfs-3.12
> 
> Thanks,
> Riccardo
> 
> --
> Riccardo Murri / Email: riccardo.murri at gmail.com / Tel.: +41 77 458 98 32