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* [PATCH] grub2 should not unzip Linux initramfs
@ 2013-11-12 10:25 Lukas Schwaighofer
  2013-11-12 20:03 ` Vladimir 'φ-coder/phcoder' Serbinenko
  0 siblings, 1 reply; 2+ messages in thread
From: Lukas Schwaighofer @ 2013-11-12 10:25 UTC (permalink / raw)
  To: grub-devel


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Hi,

the initramfs protocol (see [1]) supports multiple concatenated archives.

Because of grub2's implicit unzipping of gz-compressed multiboot
modules, a valid initramfs-file (e.g. in my case containing of two
concatenated gz-files) may be rendered unbootable.

I have attached the trivial patch adding --nounzip to the the
appropriate module-directive when generating XEN boot entries. As this
resembles the behavior when booting without XEN (using the grub2
commands linux and initrd) more closely I don't expect any problems.

I have reported this to the Debian bugtracker before [2] with no
response, but I suppose this is the correct point to report this issue.

Thank you
Lukas


[1]
https://www.kernel.org/doc/Documentation/early-userspace/buffer-format.txt
[2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=700197


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[-- Attachment #1.2: xen_initrd_nounzip.patch --]
[-- Type: text/x-patch; name="xen_initrd_nounzip.patch", Size: 489 bytes --]

diff --git a/util/grub.d/20_linux_xen.in b/util/grub.d/20_linux_xen.in
index 4cf93d2..f12f059 100644
--- a/util/grub.d/20_linux_xen.in
+++ b/util/grub.d/20_linux_xen.in
@@ -135,7 +135,7 @@ EOF
     message="$(gettext_printf "Loading initial ramdisk ...")"
     sed "s/^/$submenu_indentation/" << EOF
 	echo	'$(echo "$message" | grub_quote)'
-	module	${rel_dirname}/${initrd}
+	module	--nounzip   ${rel_dirname}/${initrd}
 EOF
   fi
   sed "s/^/$submenu_indentation/" << EOF


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^ permalink raw reply related	[flat|nested] 2+ messages in thread

* Re: [PATCH] grub2 should not unzip Linux initramfs
  2013-11-12 10:25 [PATCH] grub2 should not unzip Linux initramfs Lukas Schwaighofer
@ 2013-11-12 20:03 ` Vladimir 'φ-coder/phcoder' Serbinenko
  0 siblings, 0 replies; 2+ messages in thread
From: Vladimir 'φ-coder/phcoder' Serbinenko @ 2013-11-12 20:03 UTC (permalink / raw)
  To: The development of GNU GRUB

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Committed, thanks.
On 12.11.2013 11:25, Lukas Schwaighofer wrote:
> Hi,
> 
> the initramfs protocol (see [1]) supports multiple concatenated archives.
> 
> Because of grub2's implicit unzipping of gz-compressed multiboot
> modules, a valid initramfs-file (e.g. in my case containing of two
> concatenated gz-files) may be rendered unbootable.
> 
> I have attached the trivial patch adding --nounzip to the the
> appropriate module-directive when generating XEN boot entries. As this
> resembles the behavior when booting without XEN (using the grub2
> commands linux and initrd) more closely I don't expect any problems.
> 
> I have reported this to the Debian bugtracker before [2] with no
> response, but I suppose this is the correct point to report this issue.
> 
> Thank you
> Lukas
> 
> 
> [1]
> https://www.kernel.org/doc/Documentation/early-userspace/buffer-format.txt
> [2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=700197
> 
> 
> 
> _______________________________________________
> Grub-devel mailing list
> Grub-devel@gnu.org
> https://lists.gnu.org/mailman/listinfo/grub-devel
> 



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^ permalink raw reply	[flat|nested] 2+ messages in thread

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2013-11-12 10:25 [PATCH] grub2 should not unzip Linux initramfs Lukas Schwaighofer
2013-11-12 20:03 ` Vladimir 'φ-coder/phcoder' Serbinenko

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