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Subject: Re: [Bug 198497] New: handle_mm_fault / xen_pmd_val /
 radix_tree_lookup_slot Null pointer
References: <bug-198497-27@https.bugzilla.kernel.org/>
 <20180118135518.639141f0b0ea8bb047ab6306@linux-foundation.org>
 <7ba7635e-249a-9071-75bb-7874506bd2b2@redhat.com>
 <20180119030447.GA26245@bombadil.infradead.org>
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 <20180119132145.GB2897@bombadil.infradead.org>
 <9d2ddba4-3fb3-0fb4-a058-f2cfd1b05538@redhat.com>
 <32ab6fd6-e3c6-9489-8163-aa73861aa71a@rimuhosting.com>
 <20180126194058.GA31600@bombadil.infradead.org>
 <9ff38687-edde-6b4e-4532-9c150f8ea647@rimuhosting.com>
 <20180131105456.GC28275@bombadil.infradead.org>
From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Message-ID: <164f37f1-7365-7650-24d7-70da74b3313f@I-love.SAKURA.ne.jp>
Date: Thu, 1 Feb 2018 08:02:43 +0900
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Sender: owner-linux-mm@kvack.org
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To: Matthew Wilcox <willy@infradead.org>, xen@randonwebstuff.com
Cc: Laura Abbott <labbott@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, bugzilla-daemon@bugzilla.kernel.org

https://bugzilla.redhat.com/show_bug.cgi?id=1531779

It might be something related that
"x86/mm: Found insecure W+X mapping at address" message is printed at boot.

Are you seeing "x86/mm: Found insecure W+X mapping at address" before
hitting "BUG: unable to handle kernel NULL pointer dereference" ?

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