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authorLi Zefan <lizefan@huawei.com>2013-02-18 14:13:35 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-01 08:55:47 -0700
commite129d3e2ecef34372ccf2f2ea0002e0ec72998e8 (patch)
tree6e8f3e27b15ee8b4e991ec44030e6adade74a080 /kernel/events/core.c
parent3a454fd0a92af12ab465b88a25a7089e65eb8420 (diff)
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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> Cc: Weng Meiling <wengmeiling.weng@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/events/core.c')
0 files changed, 0 insertions, 0 deletions