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perf stat: Avoid buffer overflow to the aggregation map

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CPUs may be created and passed to perf_stat__get_aggr (via
config->aggr_get_id), such as in the stat display
should_skip_zero_counter. There may be no such aggr_id, for example,
if running with a thread. Add a missing bound check and just create
IDs for these cases.

Reviewed-by: Thomas Falcon <thomas.falcon@intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: James Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20250719030517.1990983-3-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers
2025-07-24 13:41:34 -07:00
committed by Namhyung Kim
parent 62f4512238
commit 848e7a06fe
1 changed files with 1 additions and 1 deletions
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tools/perf/builtin-stat.c
+1 -1
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@@ -1365,7 +1365,7 @@ static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config,
struct aggr_cpu_id id;
/* per-process mode - should use global aggr mode */
if (cpu.cpu == -1)
if (cpu.cpu == -1 || cpu.cpu >= config->cpus_aggr_map->nr)
return get_id(config, cpu);
if (aggr_cpu_id__is_empty(&config->cpus_aggr_map->map[cpu.cpu]))