perf header: Fix one memory leakage in perf_event__fprintf_event_update()

When dump the raw trace by `perf report -D` ASan reports a memory
leakage in perf_event__fprintf_event_update().

It shows that we allocated a temporary cpumap for dumping the CPUs but
doesn't release it and it's not used elsewhere. Fix this by free the
cpumap after the dumping.

Fixes: c853f9394b7bc189 ("perf tools: Add perf_event__fprintf_event_update function")
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Junhao He <hejunhao3@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linuxarm@huawei.com
Link: https://lore.kernel.org/r/20231207081635.8427-2-yangyicong@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 08cc2febabde28e6a184ffdc7eba62fcd6b5d8d4..a9f71f8343f083e32dc49c1e3c632e2cf6c4e13d 100644 (file)
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -4391,9 +4391,10 @@ size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
                ret += fprintf(fp, "... ");
 
                map = cpu_map__new_data(&ev->cpus.cpus);
-               if (map)
+               if (map) {
                        ret += cpu_map__fprintf(map, fp);
-               else
+                       perf_cpu_map__put(map);
+               } else
                        ret += fprintf(fp, "failed to get cpus\n");
                break;
        default: