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Waiman Long 243d9f3a11 cgroup/cpuset: Add cpuset_can_fork() and cpuset_cancel_fork() methods

[ Upstream commit eee8785379 ]

In the case of CLONE_INTO_CGROUP, not all cpusets are ready to accept
new tasks. It is too late to check that in cpuset_fork(). So we need
to add the cpuset_can_fork() and cpuset_cancel_fork() methods to
pre-check it before we can allow attachment to a different cpuset.

We also need to set the attach_in_progress flag to alert other code
that a new task is going to be added to the cpuset.

Fixes: ef2c41cf38 ("clone3: allow spawning processes into cgroups")
Suggested-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Waiman Long <longman@redhat.com>
Cc: stable@vger.kernel.org # v5.7+
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2023-04-20 12:35:14 +02:00

cgroup-internal.h

memcg: Fix possible use-after-free in memcg_write_event_control()

2022-12-08 10:40:58 -08:00

cgroup-v1.c

cgroup: Use cgroup_attach_{lock,unlock}() from cgroup_attach_task_all()

2022-08-26 11:14:34 -10:00

cgroup.c

Merge tag 'cgroup-for-6.1-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2022-10-17 18:52:43 -07:00

cpuset.c

cgroup/cpuset: Add cpuset_can_fork() and cpuset_cancel_fork() methods