On Tue, Mar 16, 2021 at 08:10:45PM +0100, Ahmad Fatoum wrote:
> Hello Sascha,
>
> On 24.02.21 09:49, Sascha Hauer wrote:
> > On Tue, Feb 23, 2021 at 08:24:26AM +0100, Ahmad Fatoum wrote:
> >> This ports over Linux commit 3ce120b16cc5 ("kbuild: add
> >> '-fno-stack-check' to kernel build options"):
> >>
> >> Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> >>
> >> kbuild: add '-fno-stack-check' to kernel build options
> >>
> >> It appears that hardened gentoo enables "-fstack-check" by default for
> >> gcc.
> >>
> >> That doesn't work _at_all_ for the kernel, because the kernel stack
> >> doesn't act like a user stack at all: it's much smaller, and it doesn't
> >> auto-expand on use. So the extra "probe one page below the stack" code
> >> generated by -fstack-check just breaks the kernel in horrible ways,
> >> causing infinite double faults etc.
> >>
> >> [ I have to say, that the particular code gcc generates looks very
> >> stupid even for user space where it works, but that's a separate
> >> issue. ]
> >>
> >> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> >>
> >> I am porting it, because it may become more acute with the incoming
> >> support for multiple stacks (via initjmp).
> >>
> >> Signed-off-by: Ahmad Fatoum <ahmad@xxxxxx>
> >> ---
> >
> > Applied, thanks
>
> Can't find both patches in next.
They should be there now.
Sascha
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
