x86: check boundary in count setup resource
need to check info->res_num less than PCI_BUS_NUM_RESOURCES, so
info->bus->resource[info->res_num] = res will not beyond of bus resource
array when acpi returns too many resource entries.
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Gary Hade <gary.hade@us.ibm.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 2d88f7c..7e35078 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -77,6 +77,9 @@
struct acpi_resource_address64 addr;
acpi_status status;
+ if (info->res_num >= PCI_BUS_NUM_RESOURCES)
+ return AE_OK;
+
status = resource_to_addr(acpi_res, &addr);
if (ACPI_SUCCESS(status))
info->res_num++;
@@ -93,6 +96,9 @@
unsigned long flags;
struct resource *root;
+ if (info->res_num >= PCI_BUS_NUM_RESOURCES)
+ return AE_OK;
+
status = resource_to_addr(acpi_res, &addr);
if (!ACPI_SUCCESS(status))
return AE_OK;