On Thu, 2008-03-06 at 23:33 +0100, Thomas Renninger wrote:
> Warn if packages with invalid references are evaluated
>
> And return an error to avoid NULL pointer access.
> Lin Ming's patch avoids corrupted mem access when
> BIOS has invalid references included, the handle is now zero
> instead of corrupted.
Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
Thanks,
Lin Ming
>
>
> Signed-off-by: Thomas Renninger <trenn@xxxxxxx>
>
> ---
> Index: linux-2.6.24/drivers/acpi/utils.c
> ===================================================================
> --- linux-2.6.24.orig/drivers/acpi/utils.c
> +++ linux-2.6.24/drivers/acpi/utils.c
> @@ -407,6 +407,12 @@ acpi_evaluate_reference(acpi_handle hand
> break;
> }
>
> + if (!element->reference.handle) {
> + printk(KERN_WARNING PREFIX "Invalid reference in"
> + " package %s\n", pathname);
> + status = AE_NULL_ENTRY;
> + break;
> + }
> /* Get the acpi_handle. */
>
> list->handles[i] = element->reference.handle;
>
>
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