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Chen Zhou 3e53d64e9a cgroup-v1: add disabled controller check in cgroup1_parse_param()

[ Upstream commit 61e960b07b ]

When mounting a cgroup hierarchy with disabled controller in cgroup v1,
all available controllers will be attached.
For example, boot with cgroup_no_v1=cpu or cgroup_disable=cpu, and then
mount with "mount -t cgroup -ocpu cpu /sys/fs/cgroup/cpu", then all
enabled controllers will be attached except cpu.

Fix this by adding disabled controller check in cgroup1_parse_param().
If the specified controller is disabled, just return error with information
"Disabled controller xx" rather than attaching all the other enabled
controllers.

Fixes: f5dfb5315d ("cgroup: take options parsing into ->parse_monolithic()")
Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
Reviewed-by: Zefan Li <lizefan.x@bytedance.com>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-02-17 11:02:25 +01:00

cgroup-internal.h

fs_parse: fold fs_parameter_desc/fs_parameter_spec

2020-02-07 14:48:37 -05:00

cgroup-v1.c

cgroup-v1: add disabled controller check in cgroup1_parse_param()

2021-02-17 11:02:25 +01:00

cgroup.c

cgroup: fix psi monitor for root cgroup

2021-02-17 11:02:21 +01:00

cpuset.c

cpuset: fix race between hotplug work and later CPU offline