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Bug#806273: Patch for disabling kernel mounts when grub-mount is available

On Tue, 2016-11-15 at 15:33 +0100, Emmanuel Kasper wrote:
> The included patch disables read_only mounts when grub-mount is available.

Why not require that grub-mount is available, and disable the other
path entirely?


> This patch should also fix #788062 and #648208, which I presume are the
> same bug.
> According to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=701814#57
> it seems that the fallback for kernel mounts were mostly added as a
> "conservative fallback".
> Actually this conservative fallback can lead to data corruption as shown
> in #788062 and #648208 and  when a failed grub-mount will be succeeded
> by the attempt of a readonly
> I am looking forward for comments about the patch since the bug is
> release critical and goes back as far as 2011.
Ben Hutchings
Nothing is ever a complete failure; it can always serve as a bad

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