linux-kernel - Re: [PATCH v6 0/7] capabilities: Introduce CAP_CHECKPOINT

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Date:   Sun, 19 Jul 2020 20:17:29 +0200
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     Adrian Reber <areber@...hat.com>,
        Nicolas Viennot <Nicolas.Viennot@...sigma.com>
Cc:     Eric Biederman <ebiederm@...ssion.com>,
        Pavel Emelyanov <ovzxemul@...il.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Andrei Vagin <avagin@...il.com>,
        Michał Cłapiński <mclapinski@...gle.com>,
        Kamil Yurtsever <kyurtsever@...gle.com>,
        Dirk Petersen <dipeit@...il.com>,
        Christine Flood <chf@...hat.com>,
        Casey Schaufler <casey@...aufler-ca.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Radostin Stoyanov <rstoyanov1@...il.com>,
        Cyrill Gorcunov <gorcunov@...nvz.org>,
        Serge Hallyn <serge@...lyn.com>,
        Stephen Smalley <stephen.smalley.work@...il.com>,
        Sargun Dhillon <sargun@...gun.me>,
        Arnd Bergmann <arnd@...db.de>,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, selinux@...r.kernel.org,
        Eric Paris <eparis@...isplace.org>,
        Jann Horn <jannh@...gle.com>, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v6 0/7] capabilities: Introduce CAP_CHECKPOINT_RESTORE

On Sun, Jul 19, 2020 at 12:04:10PM +0200, Adrian Reber wrote:
> This is v6 of the 'Introduce CAP_CHECKPOINT_RESTORE' patchset. The
> changes to v5 are:
> 
>  * split patch dealing with /proc/self/exe into two patches:
>    * first patch to enable changing it with CAP_CHECKPOINT_RESTORE
>      and detailed history in the commit message
>    * second patch changes -EINVAL to -EPERM
>  * use kselftest_harness.h infrastructure for test
>  * replace if (!capable(CAP_SYS_ADMIN) || !capable(CAP_CHECKPOINT_RESTORE))
>    with if (!checkpoint_restore_ns_capable(&init_user_ns))
> 
> Adrian Reber (5):
>   capabilities: Introduce CAP_CHECKPOINT_RESTORE
>   pid: use checkpoint_restore_ns_capable() for set_tid
>   pid_namespace: use checkpoint_restore_ns_capable() for ns_last_pid
>   proc: allow access in init userns for map_files with
>     CAP_CHECKPOINT_RESTORE
>   selftests: add clone3() CAP_CHECKPOINT_RESTORE test
> 
> Nicolas Viennot (2):
>   prctl: Allow local CAP_CHECKPOINT_RESTORE to change /proc/self/exe
>   prctl: exe link permission error changed from -EINVAL to -EPERM
> 
>  fs/proc/base.c                                |   8 +-
>  include/linux/capability.h                    |   6 +
>  include/uapi/linux/capability.h               |   9 +-
>  kernel/pid.c                                  |   2 +-
>  kernel/pid_namespace.c                        |   2 +-
>  kernel/sys.c                                  |  13 +-
>  security/selinux/include/classmap.h           |   5 +-
>  tools/testing/selftests/clone3/.gitignore     |   1 +
>  tools/testing/selftests/clone3/Makefile       |   4 +-
>  .../clone3/clone3_cap_checkpoint_restore.c    | 177 ++++++++++++++++++
>  10 files changed, 212 insertions(+), 15 deletions(-)
>  create mode 100644 tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> 
> base-commit: d31958b30ea3b7b6e522d6bf449427748ad45822

Adrian, Nicolas thank you!
I grabbed the series to run the various core test-suites we've added
over the last year and pushed it to
https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/log/?h=cap_checkpoint_restore
for now to let kbuild/ltp chew on it for a bit.

Thanks!
Christian