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| author |   Li Zefan <lizefan@huawei.com> | 2013-01-24 14:43:28 +0800 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2013-02-18 09:08:10 -0800 |
| commit | 71b5707e119653039e6e95213f00479668c79b75 (patch) | |
| tree | cb0dfe84c3b8ec46efce2aa4185342a3a75cc3a1 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | cgroup: remove bogus comments in cgroup_diput() (diff) | |
| download | linux-dev-71b5707e119653039e6e95213f00479668c79b75.tar.xz linux-dev-71b5707e119653039e6e95213f00479668c79b75.zip | |
cgroup: fix exit() vs rmdir() race
In cgroup_exit() put_css_set_taskexit() is called without any lock,
which might lead to accessing a freed cgroup:
thread1 thread2
---------------------------------------------
exit()
cgroup_exit()
put_css_set_taskexit()
atomic_dec(cgrp->count);
rmdir();
/* not safe !! */
check_for_release(cgrp);
rcu_read_lock() can be used to make sure the cgroup is alive.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions