From: Stas Sergeev <stsp2@yandex.ru>
To: linux-kernel@vger.kernel.org
Cc: "Stas Sergeev" <stsp2@yandex.ru>,
"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>,
linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Christian Göttsche" <cgzones@googlemail.com>
Subject: [PATCH v2 0/2] implement OA2_INHERIT_CRED flag for openat2()
Date: Tue, 23 Apr 2024 14:01:46 +0300 [thread overview]
Message-ID: <20240423110148.13114-1-stsp2@yandex.ru> (raw)
This patch-set implements the OA2_INHERIT_CRED 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. 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.
Changes in v2:
- capture full struct cred instead of just fsuid/fsgid.
Suggested by Stefan Metzmacher <metze@samba.org>
CC: Stefan Metzmacher <metze@samba.org>
CC: Eric Biederman <ebiederm@xmission.com>
CC: Alexander Viro <viro@zeniv.linux.org.uk>
CC: Andy Lutomirski <luto@kernel.org>
CC: Christian Brauner <brauner@kernel.org>
CC: Jan Kara <jack@suse.cz>
CC: Jeff Layton <jlayton@kernel.org>
CC: Chuck Lever <chuck.lever@oracle.com>
CC: Alexander Aring <alex.aring@gmail.com>
CC: linux-fsdevel@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-api@vger.kernel.org
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Christian Göttsche <cgzones@googlemail.com>
Stas Sergeev (2):
fs: reorganize path_openat()
openat2: add OA2_INHERIT_CRED flag
fs/internal.h | 2 +-
fs/namei.c | 52 +++++++++++++++++++++++++++++-------
fs/open.c | 2 +-
include/linux/fcntl.h | 2 ++
include/uapi/linux/openat2.h | 3 +++
5 files changed, 50 insertions(+), 11 deletions(-)
--
2.44.0
next reply other threads:[~2024-04-23 11:02 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-23 11:01 Stas Sergeev [this message]
2024-04-23 11:01 ` [PATCH 1/2] fs: reorganize path_openat() Stas Sergeev
2024-04-23 11:01 ` [PATCH 2/2] openat2: add OA2_INHERIT_CRED flag Stas Sergeev
2024-04-23 16:44 ` [PATCH v2 0/2] implement OA2_INHERIT_CRED flag for openat2() Andy Lutomirski
2024-04-23 18:05 ` stsp
2024-04-23 22:52 ` stsp
2024-04-24 10:57 ` stsp
2024-04-25 0:43 ` Andy Lutomirski
2024-04-25 1:43 ` Al Viro
2024-04-25 3:31 ` Andy Lutomirski
2024-04-25 11:02 ` stsp
[not found] <20240423104824.10464-1-stsp2@yandex.ru>
2024-04-23 10:58 ` Stefan Metzmacher
2024-04-23 11:02 ` stsp
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