[PATCH] tracing/filters: Fix memory leak when setting a filter

[Li Zefan]

Every time we set a filter, we leak memory allocated by
postfix_append_operand() and postfix_append_op().

Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
---
 kernel/trace/trace_events_filter.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 2324578..98a6cc5 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -933,8 +933,9 @@ static void postfix_clear(struct filter_parse_state *ps)
 
 	while (!list_empty(&ps->postfix)) {
 		elt = list_first_entry(&ps->postfix, struct postfix_elt, list);
-		kfree(elt->operand);
 		list_del(&elt->list);
+		kfree(elt->operand);
+		kfree(elt);
 	}
 }
 
-- 
1.6.3

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