Zhang Qiao aa44002e7d cpuset: Fix unsafe lock order between cpuset lock and cpuslock ...

The backport commit 4eec5fe1c680a ("cgroup/cpuset: Fix a race
between cpuset_attach() and cpu hotplug") looks suspicious since
it comes before commit d74b27d63a8b ("cgroup/cpuset: Change
cpuset_rwsem and hotplug lock order") v5.4-rc1~176^2~30 when
the locking order was: cpuset lock, cpus lock.

Fix it with the correct locking order and reduce the cpus locking
range because only set_cpus_allowed_ptr() needs the protection of
cpus lock.

Fixes: 4eec5fe1c680a ("cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug")
Reported-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Zhang Qiao <zhangqiao22@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-03-23 09:10:41 +01:00

..

cgroup-internal.h

cgroup/tracing: Move taking of spin lock out of trace event handlers

2018-07-11 10:48:47 -07:00

cgroup-v1.c

cgroup-v1: Require capabilities to set release_agent

2022-02-11 08:44:59 +01:00

cgroup.c

cgroup: Make rebind_subsystems() disable v2 controllers all at once

2021-11-26 11:36:07 +01:00

cpuset.c

cpuset: Fix unsafe lock order between cpuset lock and cpuslock

2022-03-23 09:10:41 +01:00

debug.c

debug cgroup: use task_css_set instead of rcu_dereference

2017-11-27 11:37:33 -08:00

freezer.c

cgroup: add @flags to css_task_iter_start() and implement CSS_TASK_ITER_PROCS

2017-07-21 11:14:51 -04:00

Makefile

cgroup: Rename kernel/cgroup/stat.c to kernel/cgroup/rstat.c

2018-04-26 14:29:04 -07:00

namespace.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

pids.c

cgroup: pids: use atomic64_t for pids->limit

2019-12-17 20:34:56 +01:00

rdma.c

rdmacg: Convert to use match_string() helper

2018-05-07 09:27:26 -07:00

rstat.c

Revert "cgroup: Add memory barriers to plug cgroup_rstat_updated() race window"

2020-06-07 13:17:53 +02:00