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[ Upstream commit2543947c77] Cycles is recognized as part of a hard coded metric in stat-shadow.c, it may call print_metric_only with a NULL fmt string leading to a segfault. Handle the NULL fmt explicitly. Fixes:088519f318("perf stat: Move the display functions to stat-display.c") Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Cc: K Prateek Nayak <kprateek.nayak@amd.com> Cc: James Clark <james.clark@arm.com> Cc: Kaige Ye <ye@kaige.org> Cc: John Garry <john.g.garry@oracle.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20240209204947.3873294-4-irogers@google.com Signed-off-by: Sasha Levin <sashal@kernel.org>