[Buildroot] [Bug 13586] New: grub failure with BR2_OPTIMIZE_3

[Yann E. MORIN <yann.morin.1998@free.fr>]

Andreas, All,

On 2021-05-27 17:33 +0200, Andreas Hilse via buildroot spake thusly:
> following up on this because I also encountered this error.
> 
> There is a bug report on the grub bug tracker by Tony Battersby who
> bisected the error down to a certain patch/bugfix:
> https://savannah.gnu.org/bugs/?60458
> 
> The mentioned patch has also been included in buildroot as
> boot/grub2/0132-kern-parser-Fix-a-stack-buffer-overflow.patch with
> commit e840f2d469.
> 
> I can also confirm, that removing that patch fixes the issue of grub
> loop of endless rebooting.

Thanks for the report.

However, this patch is a security fix, so reverting it is not so nice
either.

Since it seems that using another optimisation level works arorund the
issue, I would be more inclined to change that, e.g. to -Os, as the
reporter seems to imply it works for them.

Would you please send a patch with such a workaround, please?

Regards,
Yann E. MORIN.

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