Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Zhang Qiao d1f1de5dff cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug ... commit 05c7b7a92cc87ff8d7fde189d0fade250697573c upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-03-02 11:41:00 +01:00
..
cgroup-internal.h
cgroup-v1.c	cgroup-v1: Require capabilities to set release_agent	2022-02-05 12:35:36 +01:00
cgroup.c	psi: Fix uaf issue when psi trigger is destroyed while being polled	2022-02-05 12:35:36 +01:00
cpuset.c	cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug	2022-03-02 11:41:00 +01:00
debug.c
freezer.c	cgroup: freezer: don't change task and cgroups status unnecessarily	2019-12-31 16:45:06 +01:00
legacy_freezer.c
Makefile
namespace.c
pids.c	cgroup: pids: use atomic64_t for pids->limit	2019-12-17 19:56:15 +01:00
rdma.c
rstat.c	Revert "cgroup: Add memory barriers to plug cgroup_rstat_updated() race window"	2020-06-07 13:18:46 +02:00