On Mon, Oct 08, 2018 at 09:53:48PM +0200, Thomas Gleixner wrote: > PCI BIOS requires the BIOS area 0x0A0000-0x0FFFFFF to be mapped W+X for > various legacy reasons. When CONFIG_DEBUG_WX is enabled, this triggers the > WX warning, but this is misleading because the mapping is required and is > not a result of an accidental oversight. > > Prevent the full warning when PCI BIOS is enabled and the detected WX > mapping is in the BIOS area. Just emit a pr_warn() which denotes the > fact. This is partially duplicating the info which the PCI BIOS code emits > when it maps the area as executable, but that info is not in the context of > the WX checking output. > > Reported-by: Paul Menzel <pmen...@molgen.mpg.de> > Signed-off-by: Thomas Gleixner <t...@linutronix.de> > Cc: Joerg Roedel <j...@8bytes.org> > Cc: Kees Cook <keesc...@chromium.org> > Cc: Bjorn Helgaas <bhelg...@google.com>
Tested-by: Borislav Petkov <b...@suse.de> -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.