RE: [2.6 patch] drivers/acpi/video.c: fix a NULL pointer dereference

>The Coverity checker spotted this obvious bug in 
>acpi_video_device_lcd_query_levels().
>
>
>
>Signed-off-by: Adrian Bunk <[email protected]>
>
>--- linux-2.6.16-rc5-mm3-full/drivers/acpi/video.c.old	
>2006-03-10 18:04:18.000000000 +0100
>+++ linux-2.6.16-rc5-mm3-full/drivers/acpi/video.c	
>2006-03-10 18:04:33.000000000 +0100
>@@ -321,11 +321,11 @@ acpi_video_device_lcd_query_levels(struc
> 
> 	status = acpi_evaluate_object(device->handle, "_BCL", 
>NULL, &buffer);
> 	if (!ACPI_SUCCESS(status))
> 		return_VALUE(status);
> 	obj = (union acpi_object *)buffer.pointer;
>-	if (!obj && (obj->type != ACPI_TYPE_PACKAGE)) {
>+	if (obj && (obj->type != ACPI_TYPE_PACKAGE)) {

how about
+	if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {

> 		ACPI_ERROR((AE_INFO, "Invalid _BCL data"));
> 		status = -EFAULT;
> 		goto err;
> 	}
> 
>
-
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