Messages in this thread Patch in this message | | | From | Ganapatrao Kulkarni <> | Subject | [PATCH v9 5/5] perf utils: add check for valid cpuid in function perf_pmu__find_map | Date | Tue, 17 Oct 2017 00:02:22 +0530 |
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On some platforms(arm/arm64) which uses cpus map to get corresponding cpuid string, cpuid can be NULL for PMUs other than CORE PMUs. Adding check for NULL cpuid in function perf_pmu__find_map to avoid segmentation fault.
Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com> --- tools/perf/util/pmu.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 9110718..569fb0c 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -567,6 +567,12 @@ struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu) char *cpuid = perf_pmu__getcpuid(pmu); int i; + /* on some platforms which uses cpus map, cpuid can be NULL for + * PMUs other than CORE PMUs. + */ + if (!cpuid) + return NULL; + i = 0; for (;;) { map = &pmu_events_map[i++]; -- 2.9.4
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