Bug#849382: [apt] Every package on the system gets silently upgraded to backports. The result is severe system breakage, malfunctioning and data loss.
On Sat, Jan 07, 2017 at 09:15:15PM +0100, Sven Hartge wrote:
> On Mon, 26 Dec 2016 14:40:05 +0100 (CET) <34tg535@tutanota.com> wrote:
>
> > I use Debian 8 64bit with GNOME installed with standard install
> > procedure from netinstall and using tasksel. This occured to me the
> > second time. First time was a year ago, I reinstalled Debian then and
> > a year after this happens again. Both occurences were on Debian 8,
> > stable at the time.
>
> I have seen this as well and know under which circumstances this happens:
>
> a) backports repository is enabled in source.list (obviously)
> b) "apt update" is run and all normal repositories fail to download or
> are invalid
>
> When this happens, apt will happily upgrade all packages where a
> backported version exists to that version.
This should not happen. The old repository state should be used, and thus
the pinning should not change.
That said, maybe that only works right in 1.1 and newer, I don't
really know.
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