On Fri, Nov 24, 2017 at 10:14:14AM +0100, Ingo Molnar wrote:
> From: Andy Lutomirski <l...@kernel.org>
>
> SYSENTER_stack should have reliable overflow detection, which
> means that it needs to be at the bottom of a page, not the top.
> Move it to the beginning of struct tss_struct and page-align it.
>
> Also add an assertion to make sure that the fixed hardware TSS
> doesn't cross a page boundary.
>
> Signed-off-by: Andy Lutomirski <l...@kernel.org>
> Reviewed-by: Thomas Gleixner <t...@linutronix.de>
> Cc: Borislav Petkov <b...@alien8.de>
> Cc: Borislav Petkov <bpet...@suse.de>
> Cc: Brian Gerst <brge...@gmail.com>
> Cc: Dave Hansen <dave.han...@intel.com>
> Cc: Denys Vlasenko <dvlas...@redhat.com>
> Cc: H. Peter Anvin <h...@zytor.com>
> Cc: Josh Poimboeuf <jpoim...@redhat.com>
> Cc: Linus Torvalds <torva...@linux-foundation.org>
> Cc: Peter Zijlstra <pet...@infradead.org>
> Link:
> http://lkml.kernel.org/r/8de9901e7c3a6aa8fac95b37b9c7b96f1900f11a.1511497875.git.l...@kernel.org
> Signed-off-by: Ingo Molnar <mi...@kernel.org>
> ---
> arch/x86/include/asm/processor.h | 21 ++++++++++++---------
> arch/x86/kernel/cpu/common.c | 21 +++++++++++++++++++++
> 2 files changed, 33 insertions(+), 9 deletions(-)
Reviewed-by: Borislav Petkov <b...@suse.de>
Thanks to tglx for clarifying the whole top and bottom meaning here for
me - I was confused.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
