Date: Thu, 3 Nov 2016 12:05:22 -0600 From: Kees Cook <keescook@...omium.org> To: Jann Horn <jann@...jh.net> Cc: Lafcadio Wluiki <wluikil@...il.com>, LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, linux-arch <linux-arch@...r.kernel.org> Subject: Re: [PATCH 2/2] procfs/tasks: add a simple per-task procfs hidepid= field On Thu, Nov 3, 2016 at 11:55 AM, Jann Horn <jann@...jh.net> wrote: > On Thu, Nov 03, 2016 at 10:12:55AM -0600, Kees Cook wrote: >> On Thu, Nov 3, 2016 at 9:30 AM, Lafcadio Wluiki <wluikil@...il.com> wrote: >> > (Third, rebased submission, since first two submissions yielded no replies.) >> > >> > This adds a new per-task hidepid= flag that is honored by procfs when >> > presenting /proc to the user, in addition to the existing hidepid= mount >> > option. So far, hidepid= was exclusively a per-pidns setting. Locking >> > down a set of processes so that they cannot see other user's processes >> > without affecting the rest of the system thus currently requires >> > creation of a private PID namespace, with all the complexity it brings, >> > including maintaining a stub init process as PID 1 and losing the >> > ability to see processes of the same user on the rest of the system. > [...] >> Since this adds a new prctl interface, it's best to Cc linux-arch >> (which I added now). > > Please also CC linux-api for the next iteration, since this is a new > userspace-facing API. Oops, thank you. I meant linux-api, not linux-arch. :P -Kees -- Kees Cook Nexus Security
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.