[PATCH 2/3] posix_timer: fix error path in timer_create

[Andrey Vagin]

move CLOCK_DISPATCH(which_clock, timer_create, (new_timer)) after all
posible EFAULT erros.

*_timer_create may allocate/get resources.
(for example posix_cpu_timer_create does get_task_struct)

Signed-off-by: Andrey Vagin <avagin@xxxxxxxxxx>
---
 kernel/posix-timers.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 5555e7c..ad72342 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -559,9 +559,6 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
 	new_timer->it_id = (timer_t) new_timer_id;
 	new_timer->it_clock = which_clock;
 	new_timer->it_overrun = -1;
-	error = CLOCK_DISPATCH(which_clock, timer_create, (new_timer));
-	if (error)
-		goto out;
 
 	if (copy_to_user(created_timer_id,
 			 &new_timer_id, sizeof (new_timer_id))) {
@@ -593,6 +590,10 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
 	new_timer->sigq->info.si_tid   = new_timer->it_id;
 	new_timer->sigq->info.si_code  = SI_TIMER;
 
+	error = CLOCK_DISPATCH(which_clock, timer_create, (new_timer));
+	if (error)
+		goto out;
+
 	spin_lock_irq(&current->sighand->siglock);
 	new_timer->it_signal = current->signal;
 	list_add(&new_timer->list, &current->signal->posix_timers);
-- 
1.6.6

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/