[PATCH] perf probe: Clear probe_trace_event when probe_trace_event failure

[Wang Nan]

When failure occures in add_probe_trace_event(), to avoid potential
dangling pointer and memory leak, resource attached to 'struct
probe_trace_event' should be cleared.

Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Zefan Li <lizefan@xxxxxxxxxx>
Cc: pi3orama@xxxxxxx
---
 tools/perf/util/probe-finder.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index bd8f03d..e9e37ca 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -1235,6 +1235,8 @@ static int add_probe_trace_event(Dwarf_Die *sc_die, struct probe_finder *pf)
 
 end:
 	free(args);
+	if (ret)
+		clear_probe_trace_event(tev);
 	return ret;
 }
 
-- 
1.8.3.4

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