[Samba] Segmentation fault in samba_upgradedns - Samba 4.4.5

[Rowland Penny]

On Thu, 08 Sep 2016 12:58:18 +1200
Andrew Bartlett <abartlet at samba.org> wrote:

> On Fri, 2016-09-02 at 13:19 +0100, Rowland Penny via samba wrote:
> > 
> > 
> > I have now found out why you had to provision with samba43,
> > the '--use-ntvfs' option is gone from Samba 4.4.x. I never noticed
> > because, as I said, I never used it.
> > This does of course mean that you cannot use the latest versions of
> > Samba as an AD DC with freebsd unless somehow either samba-tool or
> > freebsd is changed.
> 
> BTW, just to be clear for those on the list:
> 
> --use-ntvfs is gone by default, because we don't build it by default.
> To re-enable it if you have a really important use case you use
> --with- ntvfs-fileserver at configure time.
> 
> The main reason for that is so that when a security hole is found in
> the NTVFS file server (as all C code is prone to), that we don't have
> to make the NAS vendors and major linux distros upgrade their
> packages, as the code won't be in their binaries. 
> 
> (However we would really like to know if that is really needed, as the
> code will probably go away at some point). 
> 
> Andrew Bartlett
> 

It would seem that it is accepted practice to use '--use-ntvfs' on
Freebsd with zfs if you want an AD DC. I have some ideas on how to fix
this, but it depends on being able to build Samba on freebsd,
something I am struggling with, so bear with me.

Rowland