1 files changed, 7 insertions, 0 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 294189fc7ac8..2f11bbe376b0 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1035,6 +1035,11 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
         sig->nr_threads = 1;
         atomic_set(&sig->live, 1);
         atomic_set(&sig->sigcnt, 1);
+
+        /* list_add(thread_node, thread_head) without INIT_LIST_HEAD() */
+        sig->thread_head = (struct list_head)LIST_HEAD_INIT(tsk->thread_node);
+        tsk->thread_node = (struct list_head)LIST_HEAD_INIT(sig->thread_head);
+
         init_waitqueue_head(&sig->wait_chldexit);
         sig->curr_target = tsk;
         init_sigpending(&sig->shared_pending);
@@ -1474,6 +1479,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                         atomic_inc(&current->signal->sigcnt);
                         list_add_tail_rcu(&p->thread_group,
                                           &p->group_leader->thread_group);
+                        list_add_tail_rcu(&p->thread_node,
+                                          &p->signal->thread_head);
                 }
                 attach_pid(p, PIDTYPE_PID);
                 nr_threads++;