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security: create task_free security callback

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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>
This commit is contained in:
Kees Cook 2011-12-21 12:17:03 -08:00 • committed by James Morris
parent 9e3ff38647
commit 1a2a4d06e1
4 changed files with 20 additions and 0 deletions
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1
kernel/fork.c
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@ -192,6 +192,7 @@ void __put_task_struct(struct task_struct *tsk)
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);