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oprofile: Free potentially owned tasks in case of errors

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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>
This commit is contained in:
Robert Richter 2011-05-26 18:22:54 +02:00
parent cbf74cea07
commit 6ac6519b93
1 changed files with 9 additions and 4 deletions
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13
drivers/oprofile/buffer_sync.c
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@ -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 @@ int sync_start(void)
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);
}