Enforce stricter checks for address space descriptors according to ACPI spec. Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> --- drivers/acpi/resource.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index 26b47f1da523..e82149e44347 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -192,6 +192,14 @@ static bool acpi_decode_space(struct resource *res, bool wp = base->info.mem.write_protect; u64 len = addr->address_length; + /* + * Filter out invalid descriptor according to ACPI Spec 5.0, section + * 6.4.3.5 Address Space Resource Descriptors. + */ + if ((base->min_address_fixed != base->max_address_fixed && len) || + (base->min_address_fixed && base->max_address_fixed && !len)) + return false; + res->start = addr->minimum; res->end = addr->maximum; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
