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| author | Li Zefan <lizefan@huawei.com> | 2013-02-18 14:13:35 +0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-10-26 21:06:11 +0100 |
| commit | 31e0470e9906c42edfc4cf00404d4eb3a99dac7e (patch) | |
| tree | f303636e1d66d134748114d94979083e062c4ab6 /net/lapb/lapb_timer.c | |
| parent | 5f7f65dae41a2f2ba134b880d2b9a8bc459ba01b (diff) | |
cgroup: fail if monitored file and event_control are in different cgroup
commit f169007b2773f285e098cb84c74aac0154d65ff7 upstream.
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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions