cgroup-v1: Require capabilities to set release_agent commit 24f6008564183aa120d07c03d9289519c2fe02af upstream. The cgroup release_agent is called with call_usermodehelper. The function call_usermodehelper starts the release_agent with a full set fo capabilities. Therefore require capabilities when setting the release_agaent. BUG=b/218320729 TEST=presubmit RELEASE_NOTE=This resolves CVE-2022-0492 cos-patch: security-moderate Reported-by: Tabitha Sable <tabitha.c.sable@gmail.com> Tested-by: Tabitha Sable <tabitha.c.sable@gmail.com> Fixes: 81a6a5cdd2c5 ("Task Control Groups: automatic userspace notification of idle cgroups") Cc: stable@vger.kernel.org # v2.6.24+ Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Change-Id: I9bb8dbc0eb53e9ca4cc0f20a934604d14ce29369 Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/29042 Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com> Tested-by: Roy Yang <royyang@google.com> 1 file changed
