diff mbox series

drivers: dio: fix possible memory leak in dio_init()

Message ID 20221109064036.1835346-1-yangyingliang@huawei.com
State New
Headers
Series drivers: dio: fix possible memory leak in dio_init() |

Commit Message

Yang Yingliang Nov. 9, 2022, 6:40 a.m. UTC 
  If device_register() returns error, the 'dev' and name needs be
freed. Add a release function, and then call put_device() in the
error path, so the name is freed in kobject_cleanup() and to the
'dev' is freed in release function.

Fixes: 2e4c77bea3d8 ("m68k: dio - Kill warn_unused_result warnings")
Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/dio/dio.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
index 0e5a5662d5a4..0a051d656880 100644
--- a/drivers/dio/dio.c
+++ b/drivers/dio/dio.c
@@ -109,6 +109,12 @@  static char dio_no_name[] = { 0 };
 
 #endif /* CONFIG_DIO_CONSTANTS */
 
+static void dio_dev_release(struct device *dev)
+{
+	struct dio_dev *ddev = container_of(dev, typeof(struct dio_dev), dev);
+	kfree(ddev);
+}
+
 int __init dio_find(int deviceid)
 {
 	/* Called to find a DIO device before the full bus scan has run.
@@ -225,6 +231,7 @@  static int __init dio_init(void)
 		dev->bus = &dio_bus;
 		dev->dev.parent = &dio_bus.dev;
 		dev->dev.bus = &dio_bus_type;
+		dev->dev.release = dio_dev_release;
 		dev->scode = scode;
 		dev->resource.start = pa;
 		dev->resource.end = pa + DIO_SIZE(scode, va);
@@ -252,6 +259,7 @@  static int __init dio_init(void)
 		if (error) {
 			pr_err("DIO: Error registering device %s\n",
 			       dev->name);
+			put_device(&dev->dev);
 			continue;
 		}
 		error = dio_create_sysfs_dev_files(dev);