Merge tag 'pidfd-updates-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/braun...

[sfrench/cifs-2.6.git] / kernel / signal.c

diff --git a/kernel/signal.c b/kernel/signal.c
index 91cb8ca41954ad4559e95c627f3189dba651ac53..dabe100d209191cb6b15a6f80910e92b28553f11 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1881,6 +1881,14 @@ ret:
        return ret;
 }
 
+static void do_notify_pidfd(struct task_struct *task)
+{
+       struct pid *pid;
+
+       pid = task_pid(task);
+       wake_up_all(&pid->wait_pidfd);
+}
+
 /*
  * Let a parent know about the death of a child.
  * For a stopped/continued status change, use do_notify_parent_cldstop instead.
@@ -1904,6 +1912,9 @@ bool do_notify_parent(struct task_struct *tsk, int sig)
        BUG_ON(!tsk->ptrace &&
               (tsk->group_leader != tsk || !thread_group_empty(tsk)));
 
+       /* Wake up all pidfd waiters */
+       do_notify_pidfd(tsk);
+
        if (sig != SIGCHLD) {
                /*
                 * This is only possible if parent == real_parent.