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Message-ID: <20200720123359.GA4205@openwall.com>
Date: Mon, 20 Jul 2020 14:33:59 +0200
From: Solar Designer <solar@...nwall.com>
To: lkrg-users@...ts.openwall.com
Subject: Re: kernel: BUG: unable to handle page fault for address: ffffffffab42fee7
On Mon, Jul 20, 2020 at 02:10:23PM +0200, Mikhail Morfikov wrote:
> On 20/07/2020 13.20, Solar Designer wrote:
> >
> > Oh, I think I understand now. LKRG checks its known UMH program
> > pathnames at its initialization time and then only allows those that
> > were actually found on the system. Since you don't have
> > /sbin/bridge-stp, LKRG doesn't allow it. Then it also fails on trying
> > to block its execution because of CPA.
> >
> > As a temporary workaround, you can try creating /sbin/bridge-stp as a
> > copy of /bin/false.
>
> It looks like this doesn't help much:
>
> # cp /bin/false /sbin/bridge-stp
> # ls -al /sbin/bridge-stp
> -rwxr-xr-x 1 root root 35584 2020-07-20 14:02:00 /sbin/bridge-stp*
You need to restart LKRG after this step (rmmod, modprobe) for it to
detect the presence of /sbin/bridge-stp.
Alexander
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