linux-kernel - Re: kernel BUG at arch/x86/kernel/apic/apic.c with Dell server with x2APIC enabled and unset X2APIC

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Message-ID: <834f42cc-a517-6a8c-d1ac-b327171779f1@molgen.mpg.de>
Date:   Fri, 21 Feb 2020 17:15:00 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "x86@...nel.org" <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, it+linux-x86@...gen.mpg.de
Subject: Re: kernel BUG at arch/x86/kernel/apic/apic.c with Dell server with
 x2APIC enabled and unset X2APIC

Dear Borislav,


On 2020-02-21 16:57, Borislav Petkov wrote:
> On Fri, Feb 21, 2020 at 03:37:23PM +0100, Paul Menzel wrote:

>> On the Dell PowerEdge T640/04WYPY, BIOS 2.4.8 11/27/2019, Linux 5.4.14 (and 4.19.57) with
>> unset `IRQ_REMAP` and `X86_X2APIC` crashes on start-up, when x2APIC is enabled in the
>> firmware.
> 
> Does it happen with latest 5.5-stable too? I see 5.5.5 is the last one...

It also happens with Linux 5.6-rc2.


Kind regards,

Paul


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