From: Christian Brauner <christian.brauner@ubuntu.com>
To: keescook@chromium.org, luto@amacapital.net
Cc: jannh@google.com, wad@chromium.org, shuah@kernel.org,
ast@kernel.org, daniel@iogearbox.net, kafai@fb.com,
songliubraving@fb.com, yhs@fb.com, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org, netdev@vger.kernel.org,
bpf@vger.kernel.org,
Christian Brauner <christian.brauner@ubuntu.com>
Subject: [PATCH v1 0/3] seccomp: continue syscall from notifier
Date: Thu, 19 Sep 2019 11:59:00 +0200 [thread overview]
Message-ID: <20190919095903.19370-1-christian.brauner@ubuntu.com> (raw)
Hey everyone,
This is the patchset coming out of the KSummit session Kees and I gave
in Lisbon last week (cf. [3] which also contains slides with more
details on related things such as deep argument inspection).
The simple idea is to extend the seccomp notifier to allow for the
continuation of a syscall. The rationale for this can be found in the
commit message to [1]. For the curious there is more detail in [2].
This patchset would unblock supervising an extended set of syscalls such
as mount() where a privileged process is supervising the syscalls of a
lesser privileged process and emulates the syscall for the latter in
userspace.
For more comments on security see [1].
Kees, if you prefer a pr the series can be pulled from:
git@gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux tags/seccomp-notify-syscall-continue-v5.5
For anyone who wants to play with this it's sitting in:
https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/log/?h=seccomp_syscall_continue
/* v1 */
- Kees Cook <keescook@chromium.org>:
- dropped patch because it is already present in linux-next
[PATCH 2/4] seccomp: add two missing ptrace ifdefines
Link: https://lore.kernel.org/r/20190918084833.9369-3-christian.brauner@ubuntu.com
/* v0 */
Link: https://lore.kernel.org/r/20190918084833.9369-1-christian.brauner@ubuntu.com
Thanks!
Christian
/* References */
[1]: [PATCH 1/3] seccomp: add SECCOMP_USER_NOTIF_FLAG_CONTINUE
[2]: https://lore.kernel.org/r/20190719093538.dhyopljyr5ns33qx@brauner.io
[3]: https://linuxplumbersconf.org/event/4/contributions/560
Christian Brauner (3):
seccomp: add SECCOMP_USER_NOTIF_FLAG_CONTINUE
seccomp: avoid overflow in implicit constant conversion
seccomp: test SECCOMP_USER_NOTIF_FLAG_CONTINUE
include/uapi/linux/seccomp.h | 20 ++++
kernel/seccomp.c | 28 ++++-
tools/testing/selftests/seccomp/seccomp_bpf.c | 105 +++++++++++++++++-
3 files changed, 146 insertions(+), 7 deletions(-)
--
2.23.0
next reply other threads:[~2019-09-19 10:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-19 9:59 Christian Brauner [this message]
2019-09-19 9:59 ` [PATCH v1 1/3] seccomp: add SECCOMP_USER_NOTIF_FLAG_CONTINUE Christian Brauner
2019-09-19 19:37 ` Jann Horn
2019-09-19 22:22 ` Christian Brauner
2019-09-19 9:59 ` [PATCH v1 2/3] seccomp: avoid overflow in implicit constant conversion Christian Brauner
2019-09-19 9:59 ` [PATCH v1 3/3] seccomp: test SECCOMP_USER_NOTIF_FLAG_CONTINUE Christian Brauner
2019-09-19 17:13 ` shuah
2019-09-19 21:50 ` Christian Brauner
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