Clamp system metrics to safe integers

comfy/system_monitor.py

@@ -20,7 +20,7 @@ MAX_VOLUMES = 64
 MAX_ACCELERATORS = 64
 MAX_LABEL_LENGTH = 128
 MAX_NAME_LENGTH = 256
-MAX_BYTES = 2**63 - 1
+MAX_BYTES = 2**53 - 1
 
 _cache_lock = threading.Lock()
 _cached_at = -math.inf

tests-unit/comfy_test/test_system_monitor.py

@@ -134,3 +134,8 @@ def test_missing_optional_sensors_are_null():
     assert accelerator["name"] == "Fallback GPU"
     assert accelerator["utilization_percent"] is None
     assert accelerator["temperature_c"] is None
+
+
+def test_byte_totals_fit_the_cross_language_safe_integer_contract():
+    assert system_monitor._bytes(2**63) == 2**53 - 1
+    assert system_monitor._bytes(-1) == 0