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Open Source and information security mailing list archives
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Date: Thu, 13 Oct 2022 20:54:14 -0700 From: Kees Cook <keescook@...omium.org> To: Andy Lutomirski <luto@...nel.org> Cc: Jann Horn <jannh@...gle.com>, Christian Brauner <brauner@...nel.org>, "Eric W. Biederman" <ebiederm@...ssion.com>, Jorge Merlino <jorge.merlino@...onical.com>, Al Viro <viro@...iv.linux.org.uk>, Thomas Gleixner <tglx@...utronix.de>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, John Johansen <john.johansen@...onical.com>, Paul Moore <paul@...l-moore.com>, James Morris <jmorris@...ei.org>, "Serge E. Hallyn" <serge@...lyn.com>, Stephen Smalley <stephen.smalley.work@...il.com>, Eric Paris <eparis@...isplace.org>, Richard Haines <richard_c_haines@...nternet.com>, Casey Schaufler <casey@...aufler-ca.com>, Xin Long <lucien.xin@...il.com>, "David S. Miller" <davem@...emloft.net>, Todd Kjos <tkjos@...gle.com>, Ondrej Mosnacek <omosnace@...hat.com>, Prashanth Prahlad <pprahlad@...hat.com>, Micah Morton <mortonm@...omium.org>, Fenghua Yu <fenghua.yu@...el.com>, Andrei Vagin <avagin@...il.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, apparmor@...ts.ubuntu.com, linux-security-module@...r.kernel.org, selinux@...r.kernel.org, linux-hardening@...r.kernel.org Subject: Re: [PATCH 1/2] fs/exec: Explicitly unshare fs_struct on exec On Thu, Oct 13, 2022 at 08:18:04PM -0700, Andy Lutomirski wrote: > But seriously, this makes no sense at all. It should not be possible to exec a program and then, without ptrace, change its cwd out from under it. Do we really need to preserve this behavior? Yup, already abandoned: https://lore.kernel.org/lkml/202210061301.207A20C8E5@keescook/ -- Kees Cook
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