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| author |   Li Zefan <lizefan@huawei.com> | 2013-03-05 10:57:03 +0800 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2013-03-05 09:33:25 -0800 |
| commit | 7d8e0bf56a66bab08d2f316dd87e56c08cecb899 (patch) | |
| tree | be35c2daec953f0c98241c16311879dd45bc4859 /tools/perf/scripts/python/syscall-counts.py | |
| parent | cgroup: no need to check css refs for release notification (diff) | |
| download | linux-dev-7d8e0bf56a66bab08d2f316dd87e56c08cecb899.tar.xz linux-dev-7d8e0bf56a66bab08d2f316dd87e56c08cecb899.zip | |
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>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions