[PATCH stable 5.10 1/2] perf tools: Fix a asan issue in parse_events_multi_pmu_add()

[Florian Fainelli]

From: Namhyung Kim <namhyung@xxxxxxxxxx>

commit 66c9598bd8916c6c1319d0100ac916cac89d4b0e upstream.

In the parse_events_multi_pmu_add() it passes the 'config' variable
twice to parse_events_term__num() - one for config and another for
loc_term.  I'm not sure about the second one as it's converted to
YYLTYPE variable.  Asan reports it like below:

  In function ‘parse_events_term__num’,
      inlined from ‘parse_events_multi_pmu_add’ at util/parse-events.c:1602:6:
  util/parse-events.c:2653:64: error: array subscript ‘YYLTYPE[0]’ is partly outside
                                      array bounds of ‘char[8]’ [-Werror=array-bounds]
   2653 |                 .err_term  = loc_term ? loc_term->first_column : 0,
        |                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
  util/parse-events.c: In function ‘parse_events_multi_pmu_add’:
  util/parse-events.c:1587:15: note: object ‘config’ of size 8
   1587 |         char *config;
        |               ^~~~~~
  cc1: all warnings being treated as errors

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Acked-by: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: Leo Yan <leo.yan@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230331202949.810326-2-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
[florian: Resolve conflict in parse_events_multi_pmu_add() where term
 initialization is located inside the PMU scan loop in 5.10.y]
Signed-off-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
---
 tools/perf/util/parse-events.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index c56a4d9c3be9..28a4588c1808 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1593,7 +1593,7 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
 					return -1;
 				if (parse_events_term__num(&term,
 						   PARSE_EVENTS__TERM_TYPE_USER,
-						   config, 1, false, &config,
+						   config, 1, false, NULL,
 						   NULL) < 0) {
 					free(list);
 					free(config);
-- 
2.34.1