[GIT PULL] cgroup: Fixes for v7.0-rc6

[Tejun Heo]

Hello,

The following changes since commit a72f73c4dd9b209c53cf8b03b6e97fcefad4262c:

  cgroup: Don't expose dead tasks in cgroup (2026-03-06 12:43:25 -1000)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git tags/cgroup-for-7.0-rc6-fixes

for you to fetch changes up to 089f3fcd690c71cb3d8ca09f34027764e28920a0:

  cgroup/cpuset: Skip security check for hotplug induced v1 task migration (2026-03-31 09:14:13 -1000)

----------------------------------------------------------------
cgroup: Fixes for v7.0-rc6

- Fix cgroup rmdir racing with dying tasks. Deferred task cgroup unlink
  introduced a window where cgroup.procs is empty but the cgroup is still
  populated, causing rmdir to fail with -EBUSY and selftest failures. Make
  rmdir wait for dying tasks to fully leave and fix selftests to not depend
  on synchronous populated updates.

- Fix cpuset v1 task migration failure from empty cpusets under strict
  security policies. When CPU hotplug removes the last CPU from a v1
  cpuset, tasks must be migrated to an ancestor without a
  security_task_setscheduler() check that would block the migration.

----------------------------------------------------------------
Tejun Heo (3):
      cgroup: Wait for dying tasks to leave on rmdir
      selftests/cgroup: Don't require synchronous populated update on task exit
      cgroup: Fix cgroup_drain_dying() testing the wrong condition

Waiman Long (2):
      cgroup/cpuset: Simplify setsched decision check in task iteration loop of cpuset_can_attach()
      cgroup/cpuset: Skip security check for hotplug induced v1 task migration

 include/linux/cgroup-defs.h                        |  3 +
 kernel/cgroup/cgroup.c                             | 88 +++++++++++++++++++++-
 kernel/cgroup/cpuset.c                             | 29 ++++---
 tools/testing/selftests/cgroup/lib/cgroup_util.c   | 15 ++++
 .../selftests/cgroup/lib/include/cgroup_util.h     |  2 +
 tools/testing/selftests/cgroup/test_core.c         |  3 +-
 tools/testing/selftests/cgroup/test_kill.c         |  7 +-
 7 files changed, 131 insertions(+), 16 deletions(-)

--
tejun