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perf header: Validate nr_domains when reading HEADER_CPU_DOMAIN_INFO

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Further validate the HEADER_CPU_DOMAIN_INFO fields, this time checking
the nr_domains field.

Assisted-by: Claude Code:claude-opus-4-6
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Arnaldo Carvalho de Melo 2026-04-10 19:08:53 -03:00 committed by Namhyung Kim
parent fab205e492
commit f823d7efb8
1 changed files with 6 additions and 0 deletions
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6
tools/perf/util/header.c
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@ -3731,6 +3731,12 @@ static int process_cpu_domain_info(struct feat_fd *ff, void *data __maybe_unused
if (do_read_u32(ff, &nr_domains))
return -1;
if (nr_domains > max_sched_domains) {
pr_err("Invalid HEADER_CPU_DOMAIN_INFO: nr_domains %u > max_sched_domains (%u)\n",
nr_domains, max_sched_domains);
return -1;
}
cd_map[cpu]->nr_domains = nr_domains;
cd_map[cpu]->domains = calloc(max_sched_domains, sizeof(*d_info));