perf parse: Use YYABORT to clear stack after failure, plugging leaks

Using return rather than YYABORT means that the stack isn't cleared up
following a failure. The change to YYABORT means the return value is 1
rather than -1, but the callers just check for a result of 0 (success).
Add missing free of a list when an error occurs in event_pmu.

Signed-off-by: Ian Rogers <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: captain5050

tools/perf/util/parse-events.y

@@ -284,6 +284,7 @@ PE_NAME opt_pmu_config
 	do {						\
 		parse_events_terms__delete($2);		\
 		parse_events_terms__delete(orig_terms);	\
+		free(list);				\
 		free($1);				\
 		free(pattern);				\
 		YYABORT;				\
@@ -550,7 +551,7 @@ tracepoint_name opt_event_config
 	free($1.event);
 	if (err) {
 		free(list);
-		return -1;
+		YYABORT;
 	}
 	$$ = list;
 }