ACPI: fix potential memory leaks in driver/acpi/video.c

acpi_video_bus_get_one_device() and other functions in driver/acpi/video.c do
not release allocated memory on remove and on the error path.

Signed-off-by: "Yu, Luming" <luming.yu@intel.com>
Signed-off-by: Vasily Averin <vvs@sw.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index bd48875..fcefcb1 100644 (file)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1294,7 +1294,7 @@ acpi_video_bus_get_one_device(struct acpi_device *device,
                              struct acpi_video_bus *video)
 {
        unsigned long device_id;
-       int status, result;
+       int status;
        struct acpi_video_device *data;
 
        ACPI_FUNCTION_TRACE("acpi_video_bus_get_one_device");
@@ -1346,8 +1346,11 @@ acpi_video_bus_get_one_device(struct acpi_device *device,
                if (ACPI_FAILURE(status)) {
                        ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                          "Error installing notify handler\n"));
-                       result = -ENODEV;
-                       goto end;
+                       if(data->brightness)
+                               kfree(data->brightness->levels);
+                       kfree(data->brightness);
+                       kfree(data);
+                       return -ENODEV;
                }
 
                down(&video->sem);
@@ -1359,7 +1362,6 @@ acpi_video_bus_get_one_device(struct acpi_device *device,
                return_VALUE(0);
        }
 
-      end:
        return_VALUE(-ENOENT);
 }
 
@@ -1643,8 +1645,9 @@ static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
                        printk(KERN_WARNING PREFIX
                               "hhuuhhuu bug in acpi video driver.\n");
 
+               if (data->brightness);
+                       kfree(data->brightness->levels);
                kfree(data->brightness);
-
                kfree(data);
        }
 
@@ -1785,6 +1788,10 @@ static int acpi_video_bus_add(struct acpi_device *device)
        if (ACPI_FAILURE(status)) {
                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                  "Error installing notify handler\n"));
+               acpi_video_bus_stop_devices(video);
+               acpi_video_bus_put_devices(video);
+               kfree(video->attached_array);
+               acpi_video_bus_remove_fs(device);
                result = -ENODEV;
                goto end;
        }
@@ -1796,10 +1803,8 @@ static int acpi_video_bus_add(struct acpi_device *device)
               video->flags.post ? "yes" : "no");
 
       end:
-       if (result) {
-               acpi_video_bus_remove_fs(device);
+       if (result)
                kfree(video);
-       }
 
        return_VALUE(result);
 }