Re: sudo x86info -a => kernel BUG at mm/usercopy.c:78!

[Tommi Rantala]

On 30.03.2017 20:44, Laura Abbott wrote:
> On 03/30/2017 10:37 AM, Kees Cook wrote:
> > Reads out of /dev/mem should be restricted to non-RAM on Fedora, yes?
> >
> > Tommi, do your kernels have CONFIG_STRICT_DEVMEM=y ?
> >
> > -Kees
>
> CONFIG_STRICT_DEVMEM should be on in all Fedora kernels.

Yes, the fedora kernels do have it enabled:

  $ grep STRICT_DEVMEM /boot/config-4.9.14-200.fc25.x86_64
  CONFIG_STRICT_DEVMEM=y
  CONFIG_IO_STRICT_DEVMEM=y

But I do not have it in my own build:

  $ grep STRICT_DEVMEM .config
  # CONFIG_STRICT_DEVMEM is not set

-Tommi