We previously assumed 'parent' could be null, so null pointer judgment should be added. Signed-off-by: Shida Zhang <zhangshida@xxxxxxxxxx> --- kernel/cgroup/cgroup.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index adb820e98f24..7f230b0ab644 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -5701,7 +5701,8 @@ static int cgroup_destroy_locked(struct cgroup *cgrp) } spin_unlock_irq(&css_set_lock); - cgroup1_check_for_release(parent); + if (parent) + cgroup1_check_for_release(parent); cgroup_bpf_offline(cgrp); -- 2.25.1
