| commit | 7d8e0bf56a66bab08d2f316dd87e56c08cecb899 | [log] [tgz] |
|---|---|---|
| author | Li Zefan <lizefan@huawei.com> | Tue Mar 05 10:57:03 2013 +0800 |
| committer | Tejun Heo <tj@kernel.org> | Tue Mar 05 09:33:25 2013 -0800 |
| tree | be35c2daec953f0c98241c16311879dd45bc4859 | |
| parent | f50daa704f36a6544a902c52b6cf37b0493dfc5d [diff] |
cgroup: avoid accessing modular cgroup subsys structure without locking subsys[i] is set to NULL in cgroup_unload_subsys() at modular unload, and that's protected by cgroup_mutex, and then the memory *subsys[i] resides will be freed. So this is unsafe without any locking: if (!ss || ss->module) ... v2: - add a comment for enum cgroup_subsys_id - simplify the comment in cgroup_exit() Signed-off-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>