From: Arnaldo Carvalho de Melo Date: Fri, 10 Apr 2026 22:08:53 +0000 (-0300) Subject: perf header: Validate nr_domains when reading HEADER_CPU_DOMAIN_INFO X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f823d7efb81cd2a799dc386da4f9292fdc2c1dbe;p=thirdparty%2Fkernel%2Flinux.git perf header: Validate nr_domains when reading HEADER_CPU_DOMAIN_INFO 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 Signed-off-by: Namhyung Kim --- diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index c6efddb70aee2..a2796b72adc4d 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -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));