Re: Installation disks should be using 2.6.10 kernel
On Wed, Jan 26, 2005 at 05:49:31AM -0600, Colin Watson wrote:
> On Wed, Jan 12, 2005 at 10:13:50AM -0500, Stephen Frost wrote:
> > * seb@frankengul.org (seb@frankengul.org) wrote:
> > > You're welcome. Can you strace the grub process and see what's wrong
> > > with it ?
> > > For my installation, grub is pretty useless since I'm full LVM/DM.
> >
> > Not sure how useful this is, but...
> >
> > From dmesg:
> > grub[15266]: segfault at 00000000555bcb30 rip 00000000555bcb30 rsp 00000000555bc9fc error 15
> >
> > Attached is the strace output, I didn't see anything obvious in it.
>
> I had the exact same problem (on Ubuntu rather than Debian, but hey).
> Debugging-by-printf revealed that grub segfaulted after calling
> stage2/builtins.c:disk_read_savesect_func() through the disk_read_func
> pointer in stage2/disk_io.c:rawread(); output from a printf before that
> call was printed, while output from a printf at the beginning of the
> disk_read_savesect_func() call was not printed. It *looks* like the text
> of that function is corrupt in memory, although I'm not wholly convinced
> that my debugging techniques were sound there because I'm having trouble
> debugging a 32-bit binary.
I think this last sentence was indeed bogus.
Anyway, I've narrowed down the introduction of the problem to somewhere
between 2.6.9-bk1 and 2.6.9-bk2. Suggestions for changesets in there
that could have broken grub would be gratefully appreciated.
Cheers,
--
Colin Watson [cjwatson@debian.org]
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