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| author | Li Zefan <lizefan@huawei.com> | 2013-02-18 07:13:35 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-02-18 18:31:35 +0100 |
| commit | f169007b2773f285e098cb84c74aac0154d65ff7 (patch) | |
| tree | 6b295320c25b9fe8c1e4e94fcc35570134ebb8be /drivers/char/genrtc.c | |
| parent | cgroup: fix cgroup_rmdir() vs close(eventfd) race (diff) | |
| download | linux-f169007b2773f285e098cb84c74aac0154d65ff7.tar.xz linux-f169007b2773f285e098cb84c74aac0154d65ff7.zip | |
cgroup: fail if monitored file and event_control are in different cgroup
If we pass fd of memory.usage_in_bytes of cgroup A to cgroup.event_control
of cgroup B, then we won't get memory usage notification from A but B!
What's worse, if A and B are in different mount hierarchy, we'll end up
accessing NULL pointer!
Disallow this kind of invalid usage.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/char/genrtc.c')
0 files changed, 0 insertions, 0 deletions