diff options
| author | Jing-Ting Wu <Jing-Ting.Wu@mediatek.com> | 2022-08-23 13:41:46 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2022-08-23 08:11:06 -1000 |
| commit | 763f4fb76e24959c370cdaa889b2492ba6175580 (patch) | |
| tree | 541e52a6ef13de29f061d5a3a90eedabb4938e5f /kernel/Kconfig.freezer | |
| parent | 4f7e7236435ca0abe005c674ebd6892c6e83aeb3 (diff) | |
| download | linux-763f4fb76e24959c370cdaa889b2492ba6175580.tar.gz | |
cgroup: Fix race condition at rebind_subsystems()
Root cause:
The rebind_subsystems() is no lock held when move css object from A
list to B list,then let B's head be treated as css node at
list_for_each_entry_rcu().
Solution:
Add grace period before invalidating the removed rstat_css_node.
Reported-by: Jing-Ting Wu <jing-ting.wu@mediatek.com>
Suggested-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Jing-Ting Wu <jing-ting.wu@mediatek.com>
Tested-by: Jing-Ting Wu <jing-ting.wu@mediatek.com>
Link: https://lore.kernel.org/linux-arm-kernel/d8f0bc5e2fb6ed259f9334c83279b4c011283c41.camel@mediatek.com/T/
Acked-by: Mukesh Ojha <quic_mojha@quicinc.com>
Fixes: a7df69b81aac ("cgroup: rstat: support cgroup1")
Cc: stable@vger.kernel.org # v5.13+
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/Kconfig.freezer')
0 files changed, 0 insertions, 0 deletions