Date: Mon, 10 Oct 2005 10:07:35 +0900
Message-ID: <87y852rxgo.dancerj%dancer@netfort.gr.jp>
From: Junichi Uekawa <dancer@netfort.gr.jp>
To: Scott James Remnant <scott@netsplit.com>
Cc: Junichi Uekawa <dancer@netfort.gr.jp>, 322309@bugs.debian.org,
       322309-submitter@bugs.debian.org, 329468@bugs.debian.org,
       329468-submitter@bugs.debian.org, debian-devel@bugs.debian.org,
       linux-kernel@vger.kernel.org, 332903-submitter@bugs.debian.org
Subject: Re: Bug#322309: Debian woody dpkg no longer works with recent	linux kernel.
In-Reply-To: <1128897196.19000.3.camel@localhost.localdomain>
References: <87zmpi3ell.dancerj%dancer@netfort.gr.jp>
	<1128897196.19000.3.camel@localhost.localdomain>
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Hi,

> > dpkg in Debian woody (3.0) is broken by recent linux kernels;
> > due to the following command changing behavior (mmap of 
> > zero-byte length):
> > 
> >   addr=mmap(NULL, 0, PROT_READ, MAP_SHARED, fd, 0);
> > 
> > These bugs are caused by mmap changing behavior; 
> > it used to return NULL when given a length of 0.
> > However, it now returns -1, and gives back an errno=EINVAL.
> > 
> Indeed.  This was the sole change in the 1.13.8 release.

Thanks, I didn't notice it was since 2.6.12. woody dpkg
was long broken. I've only seen more recent reports about this.

To fix this problem, will require update to 
dpkg in woody; which might not be feasible.
We could drop support of woody chroots in etch.
It might be possible to add a workaround hack 
in [c]debootstrap to trap mmap; or fill 
status/available files before invoking dpkg.


I'm not quite sure why sarge manages to bootstrap despite 
having a dpkg version (1.10.28) that shouldn't work.


regards,
	junichi

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