linux/kernel/cgroup
Michal Koutný 467a726b75 cgroup-v1: Correct privileges check in release_agent writes
The idea is to check: a) the owning user_ns of cgroup_ns, b)
capabilities in init_user_ns.

The commit 24f6008564 ("cgroup-v1: Require capabilities to set
release_agent") got this wrong in the write handler of release_agent
since it checked user_ns of the opener (may be different from the owning
user_ns of cgroup_ns).
Secondly, to avoid possibly confused deputy, the capability of the
opener must be checked.

Fixes: 24f6008564 ("cgroup-v1: Require capabilities to set release_agent")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/stable/20220216121142.GB30035@blackbody.suse.cz/
Signed-off-by: Michal Koutný <mkoutny@suse.com>
Reviewed-by: Masami Ichikawa(CIP) <masami.ichikawa@cybertrust.co.jp>
Signed-off-by: Tejun Heo <tj@kernel.org>
2022-02-22 08:12:22 -10:00
..
cgroup-internal.h cgroup: Use open-time cgroup namespace for process migration perm checks 2022-01-06 11:02:29 -10:00
cgroup-v1.c cgroup-v1: Correct privileges check in release_agent writes 2022-02-22 08:12:22 -10:00
cgroup.c cgroup: clarify cgroup_css_set_fork() 2022-02-22 07:35:19 -10:00
cpuset.c cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug 2022-02-14 09:48:04 -10:00
debug.c kernel: cgroup: fix misuse of %x 2019-05-06 08:47:48 -07:00
freezer.c cgroup: freezer: don't change task and cgroups status unnecessarily 2019-11-07 07:38:41 -08:00
legacy_freezer.c cgroup: rename freezer.c into legacy_freezer.c 2019-04-19 11:26:48 -07:00
Makefile cgroup: Add misc cgroup controller 2021-04-04 13:34:46 -04:00
misc.c misc_cgroup: remove error log to avoid log flood 2021-09-20 07:35:38 -10:00
namespace.c memcg: enable accounting for new namesapces and struct nsproxy 2021-09-03 09:58:12 -07:00
pids.c clone3: allow spawning processes into cgroups 2020-02-12 17:57:51 -05:00
rdma.c cgroup: fix spelling mistakes 2021-05-24 12:45:26 -04:00
rstat.c cgroup/rstat: check updated_next only for root 2022-01-06 11:50:34 -10:00