Re: [patch 4/4] sony-laptop: potential null dereference

Mattia Dongili
2011-02-27T12:20:27Z

On Sat, Feb 26, 2011 at 03:56:11PM +0300, Dan Carpenter wrote:
> In the original code, if "device_enum" was NULL then it would
> dereference it when it printed the error message.

Yup, this and the others are actual bugs, thanks for reviewing the code.

> Signed-off-by: Dan Carpenter <error27@gmail.com>
>
> diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
> index 0db9049..c24aa4a 100644
> --- a/drivers/platform/x86/sony-laptop.c
> +++ b/drivers/platform/x86/sony-laptop.c
> @@ -1311,7 +1311,11 @@ static void sony_nc_rfkill_setup(struct acpi_device *device)
> }
>
> device_enum = (union acpi_object *) buffer.pointer;
> - if (!device_enum || device_enum->type != ACPI_TYPE_BUFFER) {
> + if (!device_enum) {
> + pr_err(DRV_PFX "Invalid SN06 return object.");

Just a nitpick but I'd say there was no return object at all. ;)

--
mattia
:wq!