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.
Created attachment 6218 [details] ASL code to reproduce bug. The demo Method contains ASL code alternated with the Method declarations (ACPI doesn't refuse such code). Exception unexpectedly happens after execution of some usual ASL code preceded the new Method declarations. Exception to happen depends somehow on the execution of another Method during the mentioned usual ASL code flow. INTERNAL BUG NUMBER 84
Created attachment 7968 [details] Proposed patch TESTED: 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 GNU/Linux for the following (all) 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 new errors).
Fix integrated into ACPICA version 20060526
ACPICA 20060608 shipped in Linux 2.6.17-git9, closed.