[PATCH 1/3] oprofile: Free potentially owned tasks in case of errors

Robert Richter
2011-05-31T17:31:11Z

After registering the task free notifier we possibly have tasks in our
dying_tasks list. Free them after unregistering the notifier in case
of an error.

Cc: <stable@kernel.org> # .36+
Signed-off-by: Robert Richter <robert.richter@amd.com>
---
drivers/oprofile/buffer_sync.c | 13 +++++++++----
1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index a3984f4..04250aa 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -141,6 +141,13 @@ static struct notifier_block module_load_nb = {
.notifier_call = module_load_notify,
};

+static void free_all_tasks(void)
+{
+ /* make sure we don't leak task structs */
+ process_task_mortuary();
+ process_task_mortuary();
+}
+
int sync_start(void)
{
int err;
@@ -174,6 +181,7 @@ out3:
profile_event_unregister(PROFILE_TASK_EXIT, &task_exit_nb);
out2:
task_handoff_unregister(&task_free_nb);
+ free_all_tasks();
out1:
free_cpumask_var(marked_cpus);
goto out;
@@ -192,10 +200,7 @@ void sync_stop(void)
mutex_unlock(&buffer_mutex);
flush_cpu_work();

- /* make sure we don't leak task structs */
- process_task_mortuary();
- process_task_mortuary();
-
+ free_all_tasks();
free_cpumask_var(marked_cpus);
}

--
1.7.5.rc3