Hi all,
Commit dad5ab0db8de ("x86/acpi: Prevent out of bound access caused by
broken ACPI tables") was tagged for stable and merged in various stable
kernel trees (at least 3.2, 3.16, 3.18, 4.1, 4.4, 4.9 and 4.12.)
However it turns out that this commit introduced a regression on some
systems (in particular HPE Superdome 2, but possibly others.) The fix
for this breakage is:
commit 252714155f04c5d16989cb3aadb85fd1b5772f99
Author: Vikas C Sajjan
Date: Thu Nov 16 21:43:44 2017 +0530
x86/acpi: Handle SCI interrupts above legacy space gracefully
(and follow-up cleanup 4ee2ec1b1225 "x86/acpi: Reduce code duplication
in mp_override_legacy_irq()".) Unfortunately the fix-up patch was NOT
tagged for stable and also lacks a Fixes tag referring to the faulty
commit. As a consequence nobody realized they fix a regression, and this
regression is still present in all the aforementioned stable branches.
So I invite the maintainers of these stable kernel branches to backport
commits 252714155f04 and possibly 4ee2ec1b1225 to solve this issue.
Thanks,
--
Jean Delvare
SUSE L3 Support