From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Howells Subject: Re: [PATCH 18/27] bpf: Restrict kernel image access functions when the kernel is locked down Date: Fri, 20 Oct 2017 17:03:22 +0100 Message-ID: <19424.1508515402@warthog.procyon.org.uk> References: <20171020155748.kzrvg6565oxh6gmb@linux-rasp2> <20171020024732.GJ3285@linux-l9pv.suse> <150842463163.7923.11081723749106843698.stgit@warthog.procyon.org.uk> <150842476953.7923.18174368926573855810.stgit@warthog.procyon.org.uk> <20171019221829.7m5nczg3ltqmhzom@ast-mbp> <2582.1508486928@warthog.procyon.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Return-path: In-Reply-To: <20171020155748.kzrvg6565oxh6gmb@linux-rasp2> Content-ID: <19423.1508515402.1-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org> Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: jlee-IBi9RG/b67k@public.gmane.org Cc: dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, Alexei Starovoitov , linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, gnomes-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org, linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, matthew.garrett-05XSO3Yj/JvQT0dZR+AlfA@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, jforbes-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, Daniel Borkmann , "David S. Miller" , netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Gary Lin List-Id: linux-efi@vger.kernel.org jlee-IBi9RG/b67k@public.gmane.org wrote: > I think that we don't need to lock down sys_bpf() now because > we didn't lock down other interfaces for reading arbitrary > address like /dev/mem and /dev/kmem. Ummm... See patch 4. You even gave me a Reviewed-by for it ;-) David