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[alpine-devel] [PATCH] linux-grsec: fix bus error with i810 graphics

Isaac Dunham <ibid.ag@gmail.com>
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I just recently installed Alpine 3.0 on an old computer with 256 MB RAM,
800 MHz PIII CPU, and i810 graphics; it's hooked up to a 1280x1024
monitor, so vesa sucks.
When I installed xf86-video-intel, X died from a bus error.
This seems to be a known problem with Linux 3.14; the included patch
(found online) fixed it for me.

Please add this; it takes several hours to build a kernel on that
computer.
The patch may need adjustment, though; patch applied it with fuzz=2.

Thanks,
Isaac Dunham.
Isaac Dunham <ibid.ag@gmail.com>
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On Mon, Jun 09, 2014 at 09:59:36AM +0200, Natanael Copa wrote:
> On Sat, 7 Jun 2014 07:39:28 -0700
> Isaac Dunham <ibid.ag@gmail.com> wrote:
> 
> > I just recently installed Alpine 3.0 on an old computer with 256 MB RAM,
> > 800 MHz PIII CPU, and i810 graphics; it's hooked up to a 1280x1024
> > monitor, so vesa sucks.
> > When I installed xf86-video-intel, X died from a bus error.
> > This seems to be a known problem with Linux 3.14; the included patch
> > (found online) fixed it for me.
> > 
> > Please add this; it takes several hours to build a kernel on that
> > computer.
> > The patch may need adjustment, though; patch applied it with fuzz=2.
> > 
> > Thanks,
> > Isaac Dunham.
> 
> nice! thanks!
> 
> Do you have any reference to upstream commit?
> 
> -nc
I just checked and it corresponds to
b44b2140265 kernfs: add back missing error check in kernfs_fop_mmap()
in Linus' tree.
That version doesn't add back the
if (ops->mmap)
because it's supposed to bail before then under that condition.

Thanks,
Isaac Dunham


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Natanael Copa <ncopa@alpinelinux.org>
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On Sat, 7 Jun 2014 07:39:28 -0700
Isaac Dunham <ibid.ag@gmail.com> wrote:

> I just recently installed Alpine 3.0 on an old computer with 256 MB RAM,
> 800 MHz PIII CPU, and i810 graphics; it's hooked up to a 1280x1024
> monitor, so vesa sucks.
> When I installed xf86-video-intel, X died from a bus error.
> This seems to be a known problem with Linux 3.14; the included patch
> (found online) fixed it for me.
> 
> Please add this; it takes several hours to build a kernel on that
> computer.
> The patch may need adjustment, though; patch applied it with fuzz=2.
> 
> Thanks,
> Isaac Dunham.

nice! thanks!

Do you have any reference to upstream commit?

-nc


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Natanael Copa <ncopa@alpinelinux.org>
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On Mon, 9 Jun 2014 09:59:36 +0200
Natanael Copa <ncopa@alpinelinux.org> wrote:

> On Sat, 7 Jun 2014 07:39:28 -0700
> Isaac Dunham <ibid.ag@gmail.com> wrote:
> 
> > I just recently installed Alpine 3.0 on an old computer with 256 MB RAM,
> > 800 MHz PIII CPU, and i810 graphics; it's hooked up to a 1280x1024
> > monitor, so vesa sucks.
> > When I installed xf86-video-intel, X died from a bus error.
> > This seems to be a known problem with Linux 3.14; the included patch
> > (found online) fixed it for me.
> > 
> > Please add this; it takes several hours to build a kernel on that
> > computer.
> > The patch may need adjustment, though; patch applied it with fuzz=2.
> > 
> > Thanks,
> > Isaac Dunham.
> 
> nice! thanks!
> 
> Do you have any reference to upstream commit?

I found it:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/fs/kernfs/file.c?h=linux-3.14.y&id=59516f324f324b6b392b94833da3972e346c5f0c

I think it will come with 3.14.6 so maybe we just wait for that? (likely tomorrow)

-nc


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Isaac Dunham <ibid.ag@gmail.com>
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On Mon, Jun 09, 2014 at 10:40:17AM +0200, Natanael Copa wrote:
> On Mon, 9 Jun 2014 09:59:36 +0200
> Natanael Copa <ncopa@alpinelinux.org> wrote:
> 
> > On Sat, 7 Jun 2014 07:39:28 -0700
> > Isaac Dunham <ibid.ag@gmail.com> wrote:
> > 
> > > I just recently installed Alpine 3.0 on an old computer with 256 MB RAM,
> > > 800 MHz PIII CPU, and i810 graphics; it's hooked up to a 1280x1024
> > > monitor, so vesa sucks.
> > > When I installed xf86-video-intel, X died from a bus error.
> > > This seems to be a known problem with Linux 3.14; the included patch
> > > (found online) fixed it for me.
> > > 
> > > Please add this; it takes several hours to build a kernel on that
> > > computer.
> > > The patch may need adjustment, though; patch applied it with fuzz=2.
> > > 
> > > Thanks,
> > > Isaac Dunham.
> > 
> > nice! thanks!
> > 
> > Do you have any reference to upstream commit?
> 
> I found it:
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/fs/kernfs/file.c?h=linux-3.14.y&id=59516f324f324b6b392b94833da3972e346c5f0c
> 
> I think it will come with 3.14.6 so maybe we just wait for that? (likely tomorrow)

Looking at kernel.org, 3.14.7 is the kernel.org version that came out
yesterday, and the version that includes the fix.
grsec 3.14.6 does not include this, AFAICT.

Thanks,
Isaac Dunham



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Timo Teras <timo.teras@iki.fi>
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On Thu, 12 Jun 2014 21:29:03 -0700
Isaac Dunham <ibid.ag@gmail.com> wrote:

> > I found it:
> > https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/fs/kernfs/file.c?h=linux-3.14.y&id=59516f324f324b6b392b94833da3972e346c5f0c
> > 
> > I think it will come with 3.14.6 so maybe we just wait for that?
> > (likely tomorrow)
> 
> Looking at kernel.org, 3.14.7 is the kernel.org version that came out
> yesterday, and the version that includes the fix.
> grsec 3.14.6 does not include this, AFAICT.

Git says 3.14.6 has it. So does the changelogs. So the current 3.14.6
should work.

But yes, update to 3.14.7 is coming too...

/Timo


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