Commit a274019f authored by Jiang Liu's avatar Jiang Liu Committed by Rafael J. Wysocki

ACPI: Enforce stricter checks for address space descriptors

Enforce stricter checks for address space descriptors according to
ACPI spec.
Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent c78b6885
...@@ -192,6 +192,15 @@ static bool acpi_decode_space(struct resource *res, ...@@ -192,6 +192,15 @@ static bool acpi_decode_space(struct resource *res,
bool wp = addr->info.mem.write_protect; bool wp = addr->info.mem.write_protect;
u64 len = attr->address_length; u64 len = attr->address_length;
/*
* Filter out invalid descriptor according to ACPI Spec 5.0, section
* 6.4.3.5 Address Space Resource Descriptors.
*/
if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
(addr->min_address_fixed && addr->max_address_fixed && !len))
pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
addr->min_address_fixed, addr->max_address_fixed, len);
res->start = attr->minimum; res->start = attr->minimum;
res->end = attr->maximum; res->end = attr->maximum;
......
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