linux-kernel - Re: [lkp-robot] [x86/fixmap] b00b798255: BUG:unable_to_handle

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Message-ID: <CALCETrVc6rkQJ+G0RonuDRhshwoi-Hd3BCJtbFNN2ntvMpRPeQ@mail.gmail.com>
Date:   Wed, 13 Dec 2017 20:19:43 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     kernel test robot <xiaolong.ye@...el.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Borislav Petkov <bp@...en8.de>,
        Borislav Petkov <bpetkov@...e.de>,
        Brian Gerst <brgerst@...il.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        David Laight <David.Laight@...lab.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Eduardo Valentin <eduval@...zon.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Juergen Gross <jgross@...e.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Rik van Riel <riel@...hat.com>,
        Will Deacon <will.deacon@....com>,
        LKML <linux-kernel@...r.kernel.org>, tipbuild@...or.com,
        LKP <lkp@...org>
Subject: Re: [lkp-robot] [x86/fixmap] b00b798255: BUG:unable_to_handle_kernel

On Wed, Dec 13, 2017 at 7:29 PM, kernel test robot
<xiaolong.ye@...el.com> wrote:
>
> FYI, we noticed the following commit (built with gcc-6):
>
> commit: b00b798255eb414246718eeec93d1ef10f894445 ("x86/fixmap: Add LDT entries to user-shared fixmap")
> https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git WIP.x86/pti
>
> in testcase: boot
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -m 512M
>
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
>


I think the right solution is to drop this patch in favor of my series.