cgroup: Prevent kill_css() from being called more than once

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The kill_css() function may be called more than once under the condition
that the css was killed but not physically removed yet followed by the
removal of the cgroup that is hosting the css. This patch prevents any
harmm from being done when that happens.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org # v4.5+

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Waiman Long 2017-05-15 09:34:06 -04:00 • committed by Tejun Heo

parent 2ea659a9ef

commit 33c35aa481

2 changed files with 6 additions and 0 deletions

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1

include/linux/cgroup-defs.h

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5

kernel/cgroup/cgroup.c

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