security: create task_free security callback
The current LSM interface to cred_free is not sufficient for allowing
an LSM to track the life and death of a task. This patch adds the
task_free hook so that an LSM can clean up resources on task death.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/kernel/fork.c b/kernel/fork.c
index 1b2ef3c..f0e7781 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -192,6 +192,7 @@
WARN_ON(atomic_read(&tsk->usage));
WARN_ON(tsk == current);
+ security_task_free(tsk);
exit_creds(tsk);
delayacct_tsk_free(tsk);
put_signal_struct(tsk->signal);