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kernel: rename is_single_threaded(task) to current_is_single_threaded(void)

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- is_single_threaded(task) is not safe unless task == current,
  we can't use task->signal or task->mm.

- it doesn't make sense unless task == current, the task can
  fork right after the check.

Rename it to current_is_single_threaded() and kill the argument.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Oleg Nesterov
2009-07-10 03:48:23 +02:00
committed by James Morris
parent d2e3ee9b29
commit 5bb459bb45
4 changed files with 5 additions and 4 deletions
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2
security/selinux/hooks.c
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@@ -5187,7 +5187,7 @@ static int selinux_setprocattr(struct task_struct *p,
/* Only allow single threaded processes to change context */
error = -EPERM;
if (!is_single_threaded(p)) {
if (!current_is_single_threaded()) {
error = security_bounded_transition(tsec->sid, sid);
if (error)
goto abort_change;