Bug#380028: closed by Bastian Blank <waldi@debian.org> (Re: Bug#380028: mkvmlinuz requires -fno-stack-protector with gcc-4.1)
On Sun, Jul 30, 2006 at 08:47:19PM +0200, Emanuel Steen wrote:
> > The ubuntu kernel maintainers removed the mkvmlinuz support i provided to
> > their kernel package with a "nobody should be using oldworld [pmacs]" kind
> > of clueless message, and provided insulting when i subsequently complained
> > about this fact.
>
> I know, that sucks... but that's the way it is (was?). Now we need to aim for
> the future.
Indeed, Matt Zimermann made some claims that it is already fixed, but gives no
real detail. What i see is that mostly patches i send to the ubuntu BTS for
pegasos support got ignored until it was too late, and this probably happened
for breezy and dapper, which are the two last releases. I have no real
interest to continue losing my time with them, so others (you?) are welcome to
follow up on this and make sure they won't make this mistake the next time.
> > As such, mkvmlinuz 23 added a copy of the mkvmlinuz support files, taken
> > from the 2.6.17 debian kernel (mostly upstream though), which may or not
> > work for ubuntu kernels, but are a best effort solution.
> >
> > In any case, if you want to use mkvmlinuz with ubuntu kernels, it is
> > recomended that you rebuild the mkvmlinuz package on an ubuntu system,
> > which would take care of this problem.
>
> I recompiled mkvmlinuz with -fno-stack-protector and it worked. The new kernel
> booted just fine and everything seems good.
>
> But the fact is that mkvmlinuz in Ubuntu is a plain copy from Debian, so I
> figured that it would be wise to fix it "upstream". The thing is that I saw
> that gcc-4.1 had stack-protector enabled by default but gcc-4.0 didn't (in
> Ubuntu that is). I just assumed that was a change upstream in the gcc tree,
> but seems I was wrong about that.
Ok.
> I don't know about the current version of gcc in Debian, I just have a server
> using Debian which I haven't updated in a while so it doesn't have the latest
> version of all packages - I just works ;)
Yep, the problem is an ABI change in gcc between the version used to build
mkvmlinuz and the one used to build the kernel. If they had not removed the
mkvmlinuz support patch in such an insulting way, you would not have this
problem, so you know where to complain. Furthermore, Matt Zimermann wrote
above in a message without evidence that this issue is fixed, and i am now
very curious to know how it is fixed.
> But after Martin Michlmayr comment that Debians gcc didn't have
> stack-protector enabled I updated and checked my Debian system and saw I was
> wrong.
>
> Didn't want to create any Ubuntu vs Debian stuff, just thought it would be
> better for the greater good to change it in Debian too. Anyway, sorry about
> that.
Well, the ubuntu folk kernel folk are the cause of this one.
> > But it is clear that it would be best to educate the ubuntu speople so they
> > are more clueless about this issues. I think i can say that the debian
> > kernel team at large regret the times when Fabbionne was the ubuntu kernel
> > maintainer, and useed to cooperate more actively with the debian kernel
> > team, rather than the void that is the current communication situation. And
> > then they make noise at conferences about ways to unifying the debian based
> > kernels.
>
> Yeah, but I'm not that involved in the kernel team and don't know anyone
> there... but we will see in the future.
Just go ahead, their BTS is usually a lose of time anyway, as it gets ignored,
but i am sure that if you complain enough to the right people, they will move
themselves or something. I just don't have enough patience for this,
especially as some of the ubuntu folk participated in the witch-hunt against
me earlier this year, so ...
Friendly,
Sven Luther
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