Re: [net/bpf] 3051bf36c2 BUG: unable to handle kernel paging request at 0000a7cf

From: Borislav Petkov
Date: Thu Mar 09 2017 - 17:07:59 EST

On Thu, Mar 09, 2017 at 10:55:47PM +0100, Borislav Petkov wrote:
> Can you make that:
> setup_clear_cpu_cap(X86_FEATURE_PGE);
> and see if it fixes your issue?

Hmm, in reading the thread a bit more, that might not work. If I see it
correctly, lguest does

clear_cpu_cap(&boot_cpu_data, X86_FEATURE_PGE);

after the alternatives have run and static_cpu_has() sites have already
been patched so clearing that bit won't bring anything.


SUSE Linux GmbH, GF: Felix ImendÃrffer, Jane Smithard, Graham Norton, HRB 21284 (AG NÃrnberg)