When grub2 (i386-pc) is built with -O2 or -O3 it is unable to boot
and the system will reboot in a loop.
Tony Battersby has bisected [0] the error down to this security bugfix:
boot/grub2/0132-kern-parser-Fix-a-stack-buffer-overflow.patch
There is also a bug report by Peter Seiderer about this [1].
As discussed on the mailing list [2], this patch introduces a workaround
in the grub2.mk overriding the global optimization settings with -Os
which results in a booting system.
References:
[0] https://savannah.gnu.org/bugs/?60458
[1] https://bugs.busybox.net/show_bug.cgi?id=13586
[2] http://lists.busybox.net/pipermail/buildroot/2021-May/311524.html
Signed-off-by: Andreas Hilse <andreas.hilse@googlemail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 7cb51d4843)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
860c15087d