platform/x86: hp-bioscfg: Fix memory leaks in attribute packages

Address memory leaks while handling elements in packages.
Signed-off-by: Jorge Lopez <jorge.lopez2@hp.com>
Link: https://lore.kernel.org/r/20230731203141.30044-2-jorge.lopez2@hp.comReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c

@@ -164,6 +164,7 @@ static int hp_populate_enumeration_elements_from_package(union acpi_object *enum
 		if (expected_enum_types[eloc] != enum_obj[elem].type) {
 			pr_err("Error expected type %d for elem %d, but got type %d instead\n",
 			       expected_enum_types[eloc], elem, enum_obj[elem].type);
+			kfree(str_value);
 			return -EIO;
 		}
 
@@ -224,6 +225,7 @@ static int hp_populate_enumeration_elements_from_package(union acpi_object *enum
 					sizeof(enum_data->common.prerequisites[reqs]));
 
 				kfree(str_value);
+				str_value = NULL;
 			}
 			break;
 
@@ -275,6 +277,9 @@ static int hp_populate_enumeration_elements_from_package(union acpi_object *enum
 					strscpy(enum_data->possible_values[pos_values],
 						str_value,
 						sizeof(enum_data->possible_values[pos_values]));
+
+				kfree(str_value);
+				str_value = NULL;
 			}
 			break;
 		default:
@@ -283,6 +288,7 @@ static int hp_populate_enumeration_elements_from_package(union acpi_object *enum
 		}
 
 		kfree(str_value);
+		str_value = NULL;
 	}
 
 exit_enumeration_package:

drivers/platform/x86/hp/hp-bioscfg/int-attributes.c

@@ -179,6 +179,7 @@ static int hp_populate_integer_elements_from_package(union acpi_object *integer_
 		if (expected_integer_types[eloc] != integer_obj[elem].type) {
 			pr_err("Error expected type %d for elem %d, but got type %d instead\n",
 			       expected_integer_types[eloc], elem, integer_obj[elem].type);
+			kfree(str_value);
 			return -EIO;
 		}
 		/* Assign appropriate element value to corresponding field*/
@@ -239,6 +240,7 @@ static int hp_populate_integer_elements_from_package(union acpi_object *integer_
 					str_value,
 					sizeof(integer_data->common.prerequisites[reqs]));
 				kfree(str_value);
+				str_value = NULL;
 			}
 			break;
 
@@ -258,6 +260,9 @@ static int hp_populate_integer_elements_from_package(union acpi_object *integer_
 			pr_warn("Invalid element: %d found in Integer attribute or data may be malformed\n", elem);
 			break;
 		}
+
+		kfree(str_value);
+		str_value = NULL;
 	}
 exit_integer_package:
 	kfree(str_value);

drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c

@@ -174,6 +174,7 @@ static int hp_populate_ordered_list_elements_from_package(union acpi_object *ord
 		if (expected_order_types[eloc] != order_obj[elem].type) {
 			pr_err("Error expected type %d for elem %d, but got type %d instead\n",
 			       expected_order_types[eloc], elem, order_obj[elem].type);
+			kfree(str_value);
 			return -EIO;
 		}
 
@@ -231,6 +232,7 @@ static int hp_populate_ordered_list_elements_from_package(union acpi_object *ord
 					sizeof(ordered_list_data->common.prerequisites[reqs]));
 
 				kfree(str_value);
+				str_value = NULL;
 			}
 			break;
 
@@ -277,13 +279,17 @@ static int hp_populate_ordered_list_elements_from_package(union acpi_object *ord
 				part = strsep(&part_tmp, SEMICOLON_SEP);
 			}
 
+			kfree(str_value);
+			str_value = NULL;
 			break;
 		default:
 			pr_warn("Invalid element: %d found in Ordered_List attribute or data may be malformed\n", elem);
 			break;
 		}
 		kfree(tmpstr);
+		tmpstr = NULL;
 		kfree(str_value);
+		str_value = NULL;
 	}
 
 exit_list:

drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c

@@ -264,6 +264,7 @@ static int hp_populate_password_elements_from_package(union acpi_object *passwor
 		if (expected_password_types[eloc] != password_obj[elem].type) {
 			pr_err("Error expected type %d for elem %d, but got type %d instead\n",
 			       expected_password_types[eloc], elem, password_obj[elem].type);
+			kfree(str_value);
 			return -EIO;
 		}
 
@@ -318,6 +319,8 @@ static int hp_populate_password_elements_from_package(union acpi_object *passwor
 					sizeof(password_data->common.prerequisites[reqs]));
 
 				kfree(str_value);
+				str_value = NULL;
+
 			}
 			break;
 		case SECURITY_LEVEL:
@@ -356,6 +359,8 @@ static int hp_populate_password_elements_from_package(union acpi_object *passwor
 					str_value,
 					sizeof(password_data->encodings[pos_values]));
 				kfree(str_value);
+				str_value = NULL;
+
 			}
 			break;
 		case PSWD_IS_SET:
@@ -365,6 +370,9 @@ static int hp_populate_password_elements_from_package(union acpi_object *passwor
 			pr_warn("Invalid element: %d found in Password attribute or data may be malformed\n", elem);
 			break;
 		}
+
+		kfree(str_value);
+		str_value = NULL;
 	}
 
 exit_package:

drivers/platform/x86/hp/hp-bioscfg/string-attributes.c

@@ -171,6 +171,7 @@ static int hp_populate_string_elements_from_package(union acpi_object *string_ob
 		if (expected_string_types[eloc] != string_obj[elem].type) {
 			pr_err("Error expected type %d for elem %d, but got type %d instead\n",
 			       expected_string_types[eloc], elem, string_obj[elem].type);
+			kfree(str_value);
 			return -EIO;
 		}
 
@@ -232,6 +233,7 @@ static int hp_populate_string_elements_from_package(union acpi_object *string_ob
 					str_value,
 					sizeof(string_data->common.prerequisites[reqs]));
 				kfree(str_value);
+				str_value = NULL;
 			}
 			break;
 
@@ -250,6 +252,7 @@ static int hp_populate_string_elements_from_package(union acpi_object *string_ob
 		}
 
 		kfree(str_value);
+		str_value = NULL;
 	}
 
 exit_string_package: