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>

1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index b6c910642a1e..2f5458e244a3 100644
--- 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;
         }