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@xxxxxxx>
Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
---
Index: linux-2.6.24/drivers/acpi/utils.c
===================================================================
--- linux-2.6.24.orig/drivers/acpi/utils.c
+++ linux-2.6.24/drivers/acpi/utils.c
@@ -407,6 +407,12 @@ acpi_evaluate_reference(acpi_handle hand
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;
--
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