On Thu, 20 Jun 2019 18:19:32 -0700 Matthew Garrett <matthewgarrett@xxxxxxxxxx> wrote: > From: David Howells <dhowells@xxxxxxxxxx> > > 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@xxxxxxxxxxxxx> > Signed-off-by: David Howells <dhowells@xxxxxxxxxx > Signed-off-by: Matthew Garrett <mjg59@xxxxxxxxxx> > cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Acked-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> -- Steve > cc: Ingo Molnar <mingo@xxxxxxxxxx> > cc: "H. Peter Anvin" <hpa@xxxxxxxxx> > cc: x86@xxxxxxxxxx > ---
