linux-kernel - [PATCH 2/5] hp-bioscfg: Fix memory leaks in ordered_list_elements_from

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Date:   Tue, 25 Jul 2023 17:00:53 -0500
From:   Jorge Lopez <jorgealtxwork@...il.com>
To:     hdegoede@...hat.com, platform-driver-x86@...r.kernel.org,
        linux-kernel@...r.kernel.org, thomas@...ch.de,
        ilpo.jarvinen@...ux.intel.com
Subject: [PATCH 2/5] hp-bioscfg: Fix memory leaks in ordered_list_elements_from_package

Address memory leaks in hp_populate_ordered_list_elements_from_package() and
uninitialized variable errors.

Signed-off-by: Jorge Lopez <jorge.lopez2@...com>

---
Based on the latest platform-drivers-x86.git/for-next
---
 .../platform/x86/hp/hp-bioscfg/order-list-attributes.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c
index 7e49a8427c06..89e67db733eb 100644
--- a/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c
+++ b/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c
@@ -131,10 +131,10 @@ static int hp_populate_ordered_list_elements_from_package(union acpi_object *ord
 							  int instance_id)
 {
 	char *str_value = NULL;
-	int value_len;
+	int value_len = 0;
 	int ret;
 	u32 size;
-	u32 int_value;
+	u32 int_value = 0;
 	int elem;
 	int reqs;
 	int eloc;
@@ -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:
-- 
2.34.1