(depends on ptrace-__ptrace_detach-do-__wake_up_parent-if-we-reap-the-tracee.patch

 which exports __wake_up_parent)

Spotted by Valdis.Kletnieks@vt.edu.

selinux_bprm_committed_creds() should not play with ->wait_chldexit, now
that __wake_up_parent() is exported change the code to use this helper.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ratan Nalumasu <rnalumasu@gmail.com>
Cc: Vitaly Mayatskikh <vmayatsk@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Tested-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Reported-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

security/selinux/hooks.c

@@ -2405,7 +2405,7 @@ static void selinux_bprm_committed_creds(struct linux_binprm *bprm)
 	/* Wake up the parent if it is waiting so that it can recheck
 	 * wait permission to the new task SID. */
 	read_lock(&tasklist_lock);
-	wake_up_interruptible(&current->real_parent->signal->wait_chldexit);
+	__wake_up_parent(current, current->real_parent);
 	read_unlock(&tasklist_lock);
 }