From: Jann Horn <jannh@google.com>
To: Stas Sergeev <stsp2@yandex.ru>
Cc: linux-kernel@vger.kernel.org,
"Stefan Metzmacher" <metze@samba.org>,
"Eric Biederman" <ebiederm@xmission.com>,
"Alexander Viro" <viro@zeniv.linux.org.uk>,
"Andy Lutomirski" <luto@kernel.org>,
"Christian Brauner" <brauner@kernel.org>,
"Jan Kara" <jack@suse.cz>, "Jeff Layton" <jlayton@kernel.org>,
"Chuck Lever" <chuck.lever@oracle.com>,
"Alexander Aring" <alex.aring@gmail.com>,
"David Laight" <David.Laight@aculab.com>,
linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Christian Göttsche" <cgzones@googlemail.com>
Subject: Re: [PATCH v6 0/3] implement OA2_CRED_INHERIT flag for openat2()
Date: Tue, 21 May 2024 21:01:02 +0200 [thread overview]
Message-ID: <CAG48ez0rOch3wemsmrL-ocadG1YeJ6Lyhz1uLxJod22Unbb_GA@mail.gmail.com> (raw)
In-Reply-To: <20240427112451.1609471-1-stsp2@yandex.ru>
On Sat, Apr 27, 2024 at 1:24 PM Stas Sergeev <stsp2@yandex.ru> wrote:
> This patch-set implements the OA2_CRED_INHERIT flag for openat2() syscall.
> It is needed to perform an open operation with the creds that were in
> effect when the dir_fd was opened, if the dir was opened with O_CRED_ALLOW
> flag. This allows the process to pre-open some dirs and switch eUID
> (and other UIDs/GIDs) to the less-privileged user, while still retaining
> the possibility to open/create files within the pre-opened directory set.
As Andy Lutomirski mentioned before, Linux already has Landlock
(https://docs.kernel.org/userspace-api/landlock.html) for unprivileged
filesystem sandboxing. What benefits does OA2_CRED_INHERIT have
compared to Landlock?
next prev parent reply other threads:[~2024-05-21 19:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-27 11:24 [PATCH v6 0/3] implement OA2_CRED_INHERIT flag for openat2() Stas Sergeev
2024-04-27 11:24 ` [PATCH v6 1/3] fs: reorganize path_openat() Stas Sergeev
2024-04-27 11:24 ` [PATCH v6 2/3] open: add O_CRED_ALLOW flag Stas Sergeev
2024-04-27 11:24 ` [PATCH v6 3/3] openat2: add OA2_CRED_INHERIT flag Stas Sergeev
2024-05-04 20:38 ` Donald Buczek
2024-05-04 21:11 ` stsp
2024-05-07 7:50 ` [PATCH v6 0/3] implement OA2_CRED_INHERIT flag for openat2() Aleksa Sarai
2024-05-07 9:02 ` stsp
2024-05-07 11:58 ` Aleksa Sarai
2024-05-07 12:48 ` stsp
2024-05-21 19:01 ` Jann Horn [this message]
2024-05-21 20:35 ` stsp
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