Bug 5466

Summary: Store-to-Debug an element of Package having reference to itself results in an infinite loop
Product: ACPI Reporter: Valery A Podrezov (Valery.A.Podrezov)
Component: ACPICA-CoreAssignee: Lin Ming (ming.m.lin)
Status: CLOSED DOCUMENTED    
Severity: normal CC: acpi-bugzilla
Priority: P2    
Hardware: i386   
OS: Linux   
Kernel Version: 2.6 Subsystem:
Regression: --- Bisected commit-id:
Attachments: ASL code to reproduce bug.

Description Valery A Podrezov 2005-10-19 08:54:10 UTC 
Most recent kernel where this bug did not occur:
Distribution:
Hardware Environment:
Software Environment:
Problem Description:

The Linux kernel ACPI interpreter fails the following
AML test when it is compiled into a simulator. So if an
OEM BIOS includes this code, Linux would fail.

Steps to reproduce:

Run interpreter with the .asl demo code attached below.
Comment 1 Valery A Podrezov 2005-10-19 08:55:57 UTC 
Created attachment 6331 [details]
ASL code to reproduce bug.

The attached ASL program demonstrates the infinite loop
on Store to Debug operation. One of elements of Package
p000 is the reference to itself. Attempt to retrieve any
element of such Package and Store the result to the Debug
target produces an infinite loop.


INTERNAL BUG NUMBER

   176
Comment 2 Fu Michael 2008-01-01 22:57:48 UTC 
Ported to acpica.org bugzilla as bug# 711. Close this one.