From: Kees Cook <keescook@chromium.org>
To: Andy Lutomirski <luto@kernel.org>
Cc: Jann Horn <jannh@google.com>,
Christian Brauner <brauner@kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Jorge Merlino <jorge.merlino@canonical.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Thomas Gleixner <tglx@linutronix.de>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
John Johansen <john.johansen@canonical.com>,
Paul Moore <paul@paul-moore.com>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
Stephen Smalley <stephen.smalley.work@gmail.com>,
Eric Paris <eparis@parisplace.org>,
Richard Haines <richard_c_haines@btinternet.com>,
Casey Schaufler <casey@schaufler-ca.com>,
Xin Long <lucien.xin@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Todd Kjos <tkjos@google.com>,
Ondrej Mosnacek <omosnace@redhat.com>,
Prashanth Prahlad <pprahlad@redhat.com>,
Micah Morton <mortonm@chromium.org>,
Fenghua Yu <fenghua.yu@intel.com>,
Andrei Vagin <avagin@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
apparmor@lists.ubuntu.com, linux-security-module@vger.kernel.org,
selinux@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH 1/2] fs/exec: Explicitly unshare fs_struct on exec
Date: Thu, 13 Oct 2022 20:54:14 -0700 [thread overview]
Message-ID: <202210132052.32AE372@keescook> (raw)
In-Reply-To: <2032f766-1704-486b-8f24-a670c0b3cb32@app.fastmail.com>
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
next prev parent reply other threads:[~2022-10-14 3:54 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-06 8:27 [PATCH 0/2] fs/exec: Explicitly unshare fs_struct on exec Kees Cook
2022-10-06 8:27 ` [PATCH 1/2] " Kees Cook
2022-10-06 9:05 ` Christian Brauner
2022-10-06 10:48 ` David Laight
2022-10-06 14:13 ` Jann Horn
2022-10-06 15:25 ` Kees Cook
2022-10-06 15:35 ` Jann Horn
2025-05-13 13:05 ` Mateusz Guzik
2025-05-13 15:29 ` Eric W. Biederman
2025-05-13 20:57 ` Kees Cook
2025-05-13 21:09 ` Jann Horn
2025-05-13 22:16 ` Eric W. Biederman
2025-05-14 0:03 ` Mateusz Guzik
2025-05-14 15:33 ` Eric W. Biederman
2025-05-14 15:42 ` Kees Cook
2025-05-15 16:48 ` Eric W. Biederman
2025-05-13 23:15 ` Kees Cook
2022-10-14 3:18 ` Andy Lutomirski
2022-10-14 3:54 ` Kees Cook [this message]
2022-10-14 15:35 ` Jann Horn
2022-10-18 7:09 ` Kees Cook
2022-10-18 11:19 ` Jann Horn
2022-10-14 22:03 ` David Laight
2022-11-28 17:49 ` Eric W. Biederman
2022-10-06 8:27 ` [PATCH 2/2] exec: Remove LSM_UNSAFE_SHARE Kees Cook
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202210132052.32AE372@keescook \
--to=keescook@chromium.org \
--cc=akpm@linux-foundation.org \
--cc=apparmor@lists.ubuntu.com \
--cc=avagin@gmail.com \
--cc=bigeasy@linutronix.de \
--cc=brauner@kernel.org \
--cc=casey@schaufler-ca.com \
--cc=davem@davemloft.net \
--cc=ebiederm@xmission.com \
--cc=eparis@parisplace.org \
--cc=fenghua.yu@intel.com \
--cc=jannh@google.com \
--cc=jmorris@namei.org \
--cc=john.johansen@canonical.com \
--cc=jorge.merlino@canonical.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-hardening@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-security-module@vger.kernel.org \
--cc=lucien.xin@gmail.com \
--cc=luto@kernel.org \
--cc=mortonm@chromium.org \
--cc=omosnace@redhat.com \
--cc=paul@paul-moore.com \
--cc=pprahlad@redhat.com \
--cc=richard_c_haines@btinternet.com \
--cc=selinux@vger.kernel.org \
--cc=serge@hallyn.com \
--cc=stephen.smalley.work@gmail.com \
--cc=tglx@linutronix.de \
--cc=tkjos@google.com \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).