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>
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@ -407,6 +407,12 @@ acpi_evaluate_reference(acpi_handle handle,
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break;
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break;
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}
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}
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if (!element->reference.handle) {
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printk(KERN_WARNING PREFIX "Invalid reference in"
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" package %s\n", pathname);
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status = AE_NULL_ENTRY;
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break;
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}
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/* Get the acpi_handle. */
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/* Get the acpi_handle. */
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list->handles[i] = element->reference.handle;
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list->handles[i] = element->reference.handle;
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