perf metrics: Avoid segv if default metricgroup isn't set
commit e2b005d6 upstream. A metric is default by having "Default" within its groups. The default metricgroup name needn't be set and this can result in segv in default_metricgroup_cmp and perf_stat__print_shadow_stats_metricgroup that assume it has a value when there is a Default metric group. To avoid the segv initialize the value to "". Fixes: 1c0e4795 ("perf metrics: Sort the Default metricgroup") Signed-off-by:Ian Rogers <irogers@google.com> Reviewed-and-tested-by:
Ilkka Koskinen <ilkka@os.amperecomputing.com> Cc: James Clark <james.clark@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: John Garry <john.g.garry@oracle.com> Cc: stable@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20231204182330.654255-1-irogers@google.com Signed-off-by:
Namhyung Kim <namhyung@kernel.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
1f4d4d2c
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