diff --git a/packages/resources/npu_info.py b/packages/resources/npu_info.py
index 3f95d1ef3d845c2988f964c11e4940d2841ccac2..65c5ea4349698bf6599b52000f65968db0b06ce6 100644
--- a/packages/resources/npu_info.py
+++ b/packages/resources/npu_info.py
@@ -149,42 +149,60 @@ def get_metadatas(bdf_path):
 
 def get_model():
     bdf_file_paths = []
-    flags = os.O_WRONLY
-    modes = stat.S_IWUSR | stat.S_IRUSR
-    devnull = os.fdopen(os.open(os.devnull, flags, modes), 'w')
-    for candidate_dir in glob.glob('/sys/bus/pci/devices/*'):
-        find_metadata_cmd = ["grep", "0x1200",
-                             os.path.join(candidate_dir, "class")]
-        return_code = subprocess.call(find_metadata_cmd, shell=False,
-                                      stdout=devnull, stderr=subprocess.STDOUT)
-        if return_code == 0:
-            bdf_file_paths.append(candidate_dir)
-    for bdf_file_path in bdf_file_paths:
-        model = _get_model(bdf_file_path, devnull)
-        if model != '--':
-            return model
+    devnull = None  # 初始化变量，确保 finally 中可判断
     try:
-        cp = subprocess.Popen(args=shlex.split(FIND_SOC_PRODUCT_CMD),
-                              shell=False,
-                              universal_newlines=True,
-                              stdin=subprocess.PIPE,
-                              stdout=subprocess.PIPE,
-                              stderr=subprocess.PIPE)
-    except Exception:
+        flags = os.O_WRONLY
+        modes = stat.S_IWUSR | stat.S_IRUSR
+        devnull = os.fdopen(os.open(os.devnull, flags, modes), 'w')
+
+        # 收集候选目录
+        for candidate_dir in glob.glob('/sys/bus/pci/devices/*'):
+            find_metadata_cmd = ["grep", "0x1200", os.path.join(candidate_dir, "class")]
+            return_code = subprocess.call(
+                find_metadata_cmd,
+                shell=False,
+                stdout=devnull,
+                stderr=subprocess.STDOUT
+            )
+            if return_code == 0:
+                bdf_file_paths.append(candidate_dir)
+
+        for bdf_file_path in bdf_file_paths:
+            model = _get_model(bdf_file_path, devnull)
+            if model != '--':
+                return model
+
+        try:
+            cp = subprocess.Popen(
+                args=shlex.split(FIND_SOC_PRODUCT_CMD),
+                shell=False,
+                universal_newlines=True,
+                stdin=subprocess.PIPE,
+                stdout=subprocess.PIPE,
+                stderr=subprocess.PIPE
+            )
+        except Exception:
+            return '--'
+
+        dmi_info_lines = cp.stdout.readlines()
+        raw_product = ""
+        for line in dmi_info_lines:
+            if 'Product' in line:
+                product_infos = line.split(':')
+                if len(product_infos) < 2:
+                    return '--'
+                raw_product = product_infos[1]
+                break
+
+        product = raw_product.replace('\t', '').replace('\n', '').strip()
+        if product == 'Atlas 200I SoC A1':
+            return product
+
         return '--'
-    dmi_info_lines = cp.stdout.readlines()
-    raw_product = ""
-    for i in dmi_info_lines:
-        if 'Product' in i:
-            product_infos = i.split(':')
-            if len(product_infos) < 2:
-                return '--'
-            raw_product = product_infos[1]
-            break
-    product = raw_product.replace('\t', '').replace('\n', '').strip()
-    if product == 'Atlas 200I SoC A1':
-        return product
-    return '--'
+
+    finally:
+        if devnull is not None:  # 确保 devnull 被正确关闭
+            devnull.close()
 
 
 def _get_model(bdf_file_path, devnull):