[PATCH] kbuild: Provide way to actually disable stack protector
keescook at chromium.org
Fri Jun 26 16:18:46 EDT 2020
On Sat, Jun 27, 2020 at 04:04:33AM +0900, Masahiro Yamada wrote:
> On Tue, Jun 23, 2020 at 2:37 PM Kees Cook <keescook at chromium.org> wrote:
> > On Tue, Jun 23, 2020 at 11:33:53AM +0900, Masahiro Yamada wrote:
> > > Is it OK to not patch syscall_x32.c ?
> > Good question. Peter? (It seems all the syscall_*.c files are just a
> > table, not code -- why do they need any instrumentation changes?)
I'd still like to know the answer to this one...
> Is it useful when we know
> DISABLE_STACKPROTECTOR = -fno-stack-protector ?
I'm fine with that. My point was the using _REMOVE isn't going to work
for some compiler builds.
> I'd rather want to apply this patch
> and hard-code -fno-stack-protector where necessary.
That's fine. I will send a separate fix for arch/x86/entry/Makefile.
> cc-flags-y comes after KBUILD_CFLAGS
> so that -fno-stack-protector can negate -fstack-protector(-strong)
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