| Date | Sun, 23 Jun 2019 13:08:52 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH V34 20/29] x86/mmiotrace: Lock down the testmmiotrace module |
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On Fri, 21 Jun 2019, Matthew Garrett wrote:
> From: David Howells <dhowells@redhat.com> > > The testmmiotrace module shouldn't be permitted when the kernel is locked > down as it can be used to arbitrarily read and write MMIO space. This is > a runtime check rather than buildtime in order to allow configurations > where the same kernel may be run in both locked down or permissive modes > depending on local policy. > > Suggested-by: Thomas Gleixner <tglx@linutronix.de> > Signed-off-by: David Howells <dhowells@redhat.com > Signed-off-by: Matthew Garrett <mjg59@google.com> > cc: Thomas Gleixner <tglx@linutronix.de> > cc: Steven Rostedt <rostedt@goodmis.org> > cc: Ingo Molnar <mingo@kernel.org> > cc: "H. Peter Anvin" <hpa@zytor.com> > cc: x86@kernel.org
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
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