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-rw-r--r--kernel/cgroup/cgroup.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index db552b9f9377..75f687301bbf 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5927,11 +5927,14 @@ void cgroup_post_fork(struct task_struct *child)
spin_lock_irq(&css_set_lock);
- WARN_ON_ONCE(!list_empty(&child->cg_list));
- cset = task_css_set(current); /* current is @child's parent */
- get_css_set(cset);
- cset->nr_tasks++;
- css_set_move_task(child, NULL, cset, false);
+ /* init tasks are special, only link regular threads */
+ if (likely(child->pid)) {
+ WARN_ON_ONCE(!list_empty(&child->cg_list));
+ cset = task_css_set(current); /* current is @child's parent */
+ get_css_set(cset);
+ cset->nr_tasks++;
+ css_set_move_task(child, NULL, cset, false);
+ }
/*
* If the cgroup has to be frozen, the new task has too. Let's set