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| author | Jiang Liu <jiang.liu@linux.intel.com> | 2015-02-02 10:42:57 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-02-03 22:27:21 +0100 |
| commit | a274019fc332d7b4dcb85735978c2018522be312 (patch) | |
| tree | d815266abf1b39ccc71a23e70ef8a95f05e79d11 /drivers | |
| parent | c78b688561e684098a11012ca21a6d578f9dfb67 (diff) | |
| download | lwn-a274019fc332d7b4dcb85735978c2018522be312.tar.gz lwn-a274019fc332d7b4dcb85735978c2018522be312.zip | |
ACPI: Enforce stricter checks for address space descriptors
Enforce stricter checks for address space descriptors according to
ACPI spec.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/resource.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index 5bf73a9f26d9..57891a621b96 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -192,6 +192,15 @@ static bool acpi_decode_space(struct resource *res, bool wp = addr->info.mem.write_protect; 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->end = attr->maximum; |