| Date | Wed, 6 May 2020 10:14:54 +0200 | From | Borislav Petkov <> | Subject | Re: [patch V4 part 1 02/36] x86/hw_breakpoint: Prevent data breakpoints on cpu_entry_area |
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On Tue, May 05, 2020 at 03:16:04PM +0200, Thomas Gleixner wrote: > From: Andy Lutomirski <luto@kernel.org> > > A data breakpoint near the top of an IST stack will cause unresoverable
unrecoverable
> recursion. A data breakpoint on the GDT, IDT, or TSS is terrifying.
"terrifying" huh? Colorful. :)
> Prevent either of these from happening. > > Co-developed-by: Peter Zijlstra <peterz@infradead.org> > Signed-off-by: Andy Lutomirski <luto@kernel.org> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> > Signed-off-by: Thomas Gleixner <tglx@linutronix.de> > --- > arch/x86/kernel/hw_breakpoint.c | 25 +++++++++++++++++++++++++ > 1 file changed, 25 insertions(+)
Reviewed-by: Borislav Petkov <bp@suse.de>
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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