[patch 19/22] Fix suspend with traced tasks

-stable review patch.  If anyone has any objections, please let us know.

------------------
strace /bin/bash misbehaves after resume; this fixes it.

(akpm: it's scary calling refrigerator() in state TASK_TRACED, but it seems to
do the right thing).

Signed-off-by: Pavel Machek <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 kernel/power/process.c |    3 +--
 kernel/signal.c        |    1 +
 2 files changed, 2 insertions(+), 2 deletions(-)

--- linux-2.6.16.5.orig/kernel/power/process.c
+++ linux-2.6.16.5/kernel/power/process.c
@@ -25,8 +25,7 @@ static inline int freezeable(struct task
 	    (p->flags & PF_NOFREEZE) ||
 	    (p->exit_state == EXIT_ZOMBIE) ||
 	    (p->exit_state == EXIT_DEAD) ||
-	    (p->state == TASK_STOPPED) ||
-	    (p->state == TASK_TRACED))
+	    (p->state == TASK_STOPPED))
 		return 0;
 	return 1;
 }
--- linux-2.6.16.5.orig/kernel/signal.c
+++ linux-2.6.16.5/kernel/signal.c
@@ -1688,6 +1688,7 @@ static void ptrace_stop(int exit_code, i
 	/* Let the debugger run.  */
 	set_current_state(TASK_TRACED);
 	spin_unlock_irq(&current->sighand->siglock);
+	try_to_freeze();
 	read_lock(&tasklist_lock);
 	if (likely(current->ptrace & PT_PTRACED) &&
 	    likely(current->parent != current->real_parent ||

--
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---

• References:
  • [patch 00/22] -stable review
    • From: Greg KH <[email protected]>

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