linux

iv/linux

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Jing-Ting Wu b0d2e414bc cgroup: Fix race condition at rebind_subsystems()

commit 763f4fb76e24959c370cdaa889b2492ba6175580 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-08-31 17:17:59 +02:00

cgroup-internal.h

cgroup: Make cgroup_debug static

2022-05-18 06:59:20 -10:00

cgroup-v1.c

cgroup-v1: Correct privileges check in release_agent writes

2022-02-22 08:12:22 -10:00

cgroup.c

cgroup: Fix race condition at rebind_subsystems()

2022-08-31 17:17:59 +02:00

cpuset.c

sched, cpuset: Fix dl_cpu_busy() panic due to empty cs->cpus_allowed