Commit b6a16387 authored Mar 12, 2008 by Thomas Renninger Committed by Len Brown Mar 11, 2008

ACPICA: Warn if packages with invalid references are evaluated



And return an error to avoid NULL pointer access by the caller
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: Thomas Renninger <trenn@suse.de>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

parent d6f882e1

drivers/acpi/utils.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -407,6 +407,12 @@ acpi_evaluate_reference(acpi_handle handle,
		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;