> From: Rafael J. Wysocki <rafael@xxxxxxxxxx> > Sent: Thursday, January 7, 2021 5:48 AM > > > > Linux VM on Hyper-V crashes with the latest mainline: > > > > ... > The root cause is a VM issue AFAICS, though. Yes. > It doesn't look like the right fix to me, though. > > The problem appears to be that the string coming from _HID is too long > (which is a spec violation). Yes. We have requested Hyper-V team to fix the buggy BIOS/firmware, but we have to cope with the existing buggy Hyper-V hosts, at least before the Hyper-V fix is deployed to the hosts, and some old versions of the hosts may not get updated. :-( > The patch truncates it to match the > length of the target buffer, but that is not particularly useful. > > It would be better to use something like kstrdup_const() to initialize > acpi_device_bus_id->bus_id IMV. Makes sense. I'll submit v2 shortly. Thanks, -- Dexuan
