linux-kernel - Re: "bad pmd" errors + oops with KPTI on 4.14.11 after loading X.509 certs

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Message-ID: <20180104013742.GA5911@trogon.sfo.coreos.systems>
Date:   Wed, 3 Jan 2018 17:37:42 -0800
From:   Benjamin Gilbert <benjamin.gilbert@...eos.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        stable@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: "bad pmd" errors + oops with KPTI on 4.14.11 after loading X.509
 certs

On Wed, Jan 03, 2018 at 04:33:03PM -0800, Benjamin Gilbert wrote:
> I haven't been able to reproduce this on 4.15-rc6.

This is bad data.  I was caught by the fact that 4.14.11 has
PAGE_TABLE_ISOLATION default y but 4.15-rc6 doesn't.  Retesting.

--Benjamin Gilbert