tracing/filter: Free pred array on disabling of filter

When a filter is disabled, free the preds.

Cc: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index b6c910642a1edcfdf9ff3c88ecfc9e14a7f3f7ad..2f5458e244a3a9e2721475570d5fbc9e1b6bf32b 100644 (file)
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -1388,6 +1388,10 @@ int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
 
        if (!strcmp(strstrip(filter_string), "0")) {
                filter_disable_preds(call);
+               reset_preds(call->filter);
+               /* Make sure the filter is not being used */
+               synchronize_sched();
+               __free_preds(call->filter);
                remove_filter_string(call->filter);
                goto out_unlock;
        }