diff options
| -rw-r--r-- | fs/proc/base.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 03c8d747be48..f223a56e613c 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -3109,6 +3109,9 @@ static struct task_struct *first_tid(struct task_struct *leader, pos = NULL; if (nr && nr >= get_nr_threads(leader)) goto out; + /* It could be unhashed before we take rcu lock */ + if (!pid_alive(leader)) + goto out; /* If we haven't found our starting place yet start * with the leader and walk nr threads forward. |