audit: Call tty_audit_push_task() outside preempt disabled

[cascardo/linux.git] / kernel / audit.c

diff --git a/kernel/audit.c b/kernel/audit.c
index a300931..8429afe 100644 (file)
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -467,23 +467,16 @@ static int audit_prepare_user_tty(pid_t pid, uid_t loginuid, u32 sessionid)
        struct task_struct *tsk;
        int err;
 
-       read_lock(&tasklist_lock);
+       rcu_read_lock();
        tsk = find_task_by_vpid(pid);
-       err = -ESRCH;
-       if (!tsk)
-               goto out;
-       err = 0;
-
-       spin_lock_irq(&tsk->sighand->siglock);
-       if (!tsk->signal->audit_tty)
-               err = -EPERM;
-       spin_unlock_irq(&tsk->sighand->siglock);
-       if (err)
-               goto out;
-
-       tty_audit_push_task(tsk, loginuid, sessionid);
-out:
-       read_unlock(&tasklist_lock);
+       if (!tsk) {
+               rcu_read_unlock();
+               return -ESRCH;
+       }
+       get_task_struct(tsk);
+       rcu_read_unlock();
+       err = tty_audit_push_task(tsk, loginuid, sessionid);
+       put_task_struct(tsk);
        return err;
 }