Kernel Bug Tracker – Bug 5369
Unexpected exception on Store of ThermalZone to Debug operation
Last modified: 2006-09-28 13:20:02 UTC
Most recent kernel where this bug did not occur:
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.
Created attachment 6224 [details]
ASL code to reproduce bug.
Example of Store(ThermalZone, Debug) operation which
causes exception when try to apply the Store-to-Debug
operation to the ThermalZone type object. All other
type objects are processed properly.
INTERNAL BUG NUMBER
Created attachment 7399 [details]
PROPOSED BUG FIX:
Both data types - Devices and ThermalZones are of
type AML_TYPE_NAMED_NO_OBJ (see AcpiGbl_AmlOpInfo).
Update excludes attempts to retrieve the internal
objects of NameSpace nodes of these types. This done
now, was earlier taken into account only for Devices
This patch resolves bug 5370 too.
The update was tested by the ASLTS test suite runs
(all the test cases) on the following systems:
- CYGWIN_NT-5.1 1.5.18(0.132/4/2) 2005-07-02 20:30 i686 unknown unknown Cygwin
- Linux 2.6.5-7.191-smp #1 SMP Tue Jun 28 14:58:56 UTC 2005 i686 i686 i386
for the following modes supported by the ASLTS test suite:
- 32-bit norm mode
- 64-bit norm mode
- 32-bit slack mode
- 64-bit slack mode
The tests were run (on the systems described above) before update,
then the tests were run on those systems after update. Then results
of two runs were compared. All is Ok (the relevant error fixed, no
Released in 20060608
ACPICA 20060608 shipped in Linux 2.6.17-git9, closed.