linux-kernel - [PATCH v2 13/13] perf python: Set index error for invalid thread/cpu map items

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Message-ID: <20250710235126.1086011-14-irogers@google.com>
Date: Thu, 10 Jul 2025 16:51:26 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, James Clark <james.clark@...aro.org>, 
	Xu Yang <xu.yang_2@....com>, Howard Chu <howardchu95@...il.com>, 
	"Dr. David Alan Gilbert" <linux@...blig.org>, Levi Yun <yeoreum.yun@....com>, Andi Kleen <ak@...ux.intel.com>, 
	Thomas Richter <tmricht@...ux.ibm.com>, Weilin Wang <weilin.wang@...el.com>, 
	Tiezhu Yang <yangtiezhu@...ngson.cn>, Gautam Menghani <gautam@...ux.ibm.com>, 
	Thomas Falcon <thomas.falcon@...el.com>, Chun-Tse Shao <ctshao@...gle.com>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 13/13] perf python: Set index error for invalid thread/cpu
 map items

Returning NULL for out of bound CPU or thread map items causes
internal errors. Fix by correctly setting the error to be an index
error.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/python.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 1d9fa33d377a..2f28f71325a8 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -529,8 +529,10 @@ static PyObject *pyrf_cpu_map__item(PyObject *obj, Py_ssize_t i)
 {
 	struct pyrf_cpu_map *pcpus = (void *)obj;
 
-	if (i >= perf_cpu_map__nr(pcpus->cpus))
+	if (i >= perf_cpu_map__nr(pcpus->cpus)) {
+		PyErr_SetString(PyExc_IndexError, "Index out of range");
 		return NULL;
+	}
 
 	return Py_BuildValue("i", perf_cpu_map__cpu(pcpus->cpus, i).cpu);
 }
@@ -598,8 +600,10 @@ static PyObject *pyrf_thread_map__item(PyObject *obj, Py_ssize_t i)
 {
 	struct pyrf_thread_map *pthreads = (void *)obj;
 
-	if (i >= perf_thread_map__nr(pthreads->threads))
+	if (i >= perf_thread_map__nr(pthreads->threads)) {
+		PyErr_SetString(PyExc_IndexError, "Index out of range");
 		return NULL;
+	}
 
 	return Py_BuildValue("i", perf_thread_map__pid(pthreads->threads, i));
 }
-- 
2.50.0.727.gbf7dc18ff4-goog