apparmor: add missing rcu_dereference()

Adds a missed rcu_dereference() around real_parent.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/security/apparmor/audit.c b/security/apparmor/audit.c
index 96502b22b268..f3fafedd798a 100644
--- a/security/apparmor/audit.c
+++ b/security/apparmor/audit.c
@@ -133,7 +133,7 @@ static void audit_pre(struct audit_buffer *ab, void *ca)
                 struct aa_profile *profile = sa->aad.profile;
                 pid_t pid;
                 rcu_read_lock();
-                pid = tsk->real_parent->pid;
+                pid = rcu_dereference(tsk->real_parent)->pid;
                 rcu_read_unlock();
                 audit_log_format(ab, " parent=%d", pid);
                 if (profile->ns != root_ns) {