Zhang Qiao 05c7b7a92c cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug ... As previously discussed(https://lkml.org/lkml/2022/1/20/51), cpuset_attach() is affected with similar cpu hotplug race, as follow scenario: cpuset_attach() cpu hotplug --------------------------- ---------------------- down_write(cpuset_rwsem) guarantee_online_cpus() // (load cpus_attach) sched_cpu_deactivate set_cpu_active() // will change cpu_active_mask set_cpus_allowed_ptr(cpus_attach) __set_cpus_allowed_ptr_locked() // (if the intersection of cpus_attach and cpu_active_mask is empty, will return -EINVAL) up_write(cpuset_rwsem) To avoid races such as described above, protect cpuset_attach() call with cpu_hotplug_lock. Fixes: be367d0992 ("cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time") Cc: stable@vger.kernel.org # v2.6.32+ Reported-by: Zhao Gongyi <zhaogongyi@huawei.com> Signed-off-by: Zhang Qiao <zhangqiao22@huawei.com> Acked-by: Waiman Long <longman@redhat.com> Reviewed-by: Michal Koutný <mkoutny@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org>		2022-02-14 09:48:04 -10:00
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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: Require capabilities to set release_agent	2022-02-01 07:28:00 -10:00
cgroup.c	Merge branch 'for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2022-01-11 09:14:37 -08:00
cpuset.c	cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug	2022-02-14 09:48:04 -10:00
debug.c
freezer.c
legacy_freezer.c
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
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