[Pkg-samba-maint] Bug#868209: Samba security updates uninstallable due to broken dependency of python-talloc

[Jason Cohen]

The recent Samba security updates are uninstallable on my Jessie system. The problem appears to be with python-samba.  
It depends on python-talloc >= 2.1.6, but Jessie has version 2.1.2.  As a result, the packages cannot be updated.

Package: python-samba
Source: samba
Version: 2:4.2.14+dfsg-0+deb8u7
Installed-Size: 7,250 kB
Maintainer: Debian Samba Maintainers
<pkg-samba-maint at lists.alioth.debian.org>
Provides: python2.7-samba
Depends: python-ldb (>= 1.1.2~), python-tdb, python-ntdb, python-crypto,
python (<< 2.8), python (>= 2.7), python:any (>= 2.6.6-7~), libattr1 (>=
1:2.4.46-8), libbsd0 (>= 0.0), libc6 (>= 2.14), libldb1 (>= 0.9.21),
libpython2.7 (>= 2.7), libtalloc2 (>= 2.0.4~git20101213), libtevent0 (>=
0.9.16), python-talloc (>= 2.1.6), samba-libs (= 2:4.2.14+dfsg-0+deb8u7)

Attempting to upgrade would result in several Samba packages being held back or removed:

12 packages can be upgraded. Run 'apt list --upgradable' to see them.
root at storage-server:/etc/apt/sources.list.d# apt list --upgradable
Listing... Done
ctdb/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable from:
2:4.2.14+dfsg-0+deb8u6]
libsmbclient/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable from:
2:4.2.14+dfsg-0+deb8u6]
libwbclient0/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable from:
2:4.2.14+dfsg-0+deb8u6]
python-samba/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable from:
2:4.2.14+dfsg-0+deb8u6]
samba/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable from:
2:4.2.14+dfsg-0+deb8u6]
samba-common/oldstable 2:4.2.14+dfsg-0+deb8u7 all [upgradable from:
2:4.2.14+dfsg-0+deb8u6]
samba-common-bin/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable
from: 2:4.2.14+dfsg-0+deb8u6]
samba-dbg/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable from:
2:4.2.14+dfsg-0+deb8u6]
samba-doc/oldstable 2:4.2.14+dfsg-0+deb8u7 all [upgradable from:
2:4.2.14+dfsg-0+deb8u6]
samba-dsdb-modules/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable
from: 2:4.2.14+dfsg-0+deb8u6]
samba-libs/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable from:
2:4.2.14+dfsg-0+deb8u6]
samba-vfs-modules/oldstable 2:4.2.14+dfsg-0+deb8u7 amd64 [upgradable
from: 2:4.2.14+dfsg-0+deb8u6]

root at storage-server:~# apt upgrade
Reading package lists... Done
Building dependency tree      
Reading state information... Done
Calculating upgrade... The following package was automatically installed
and is no longer required:
  linux-image-4.9.0-0.bpo.2-amd64
Use 'apt-get autoremove' to remove it.
Done
The following packages have been kept back:
  ctdb samba samba-common samba-dbg samba-dsdb-modules
The following packages will be upgraded:
  libwbclient0 samba-doc
2 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
Need to get 441 kB of archives.
After this operation, 51.2 kB disk space will be freed.

root at storage-server:~# apt full-upgrade
Reading package lists... Done
Building dependency tree      
Reading state information... Done
Calculating upgrade... The following packages were automatically
installed and are no longer required:
  attr ctdb linux-image-4.9.0-0.bpo.2-amd64 samba-dsdb-modules
Use 'apt-get autoremove' to remove them.
Done
The following packages will be REMOVED:
  samba samba-common-bin samba-dbg
The following packages have been kept back:
  ctdb samba-dsdb-modules
The following packages will be upgraded:
  libwbclient0 samba-common samba-doc
3 upgraded, 0 newly installed, 3 to remove and 2 not upgraded.
Need to get 705 kB of archives.
After this operation, 49.8 MB disk space will be freed.

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