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Date: Wed, 7 Sep 2016 14:14:52 +0300
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: regression: lk 4.8 + !CONFIG_SHMEM + shmat() = oops
Message-ID: <20160907111452.GA138665@black.fi.intel.com>
References: <58cdb20c-8195-ca05-3700-3ab37a031848@cybernetics.com>
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Sender: owner-linux-mm@kvack.org
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To: Tony Battersby <tonyb@cybernetics.com>
Cc: Hugh Dickins <hughd@google.com>, linux-mm@kvack.org

On Tue, Aug 30, 2016 at 01:52:11PM -0400, Tony Battersby wrote:
> The following commit is causing shmat() to oops when CONFIG_SHMEM is
> not set:
> 
> c01d5b300774 ("shmem: get_unmapped_area align huge page")
> 
> Here is the oops:
> 
> BUG: unable to handle kernel NULL pointer dereference at           (null)

Sorry, for delay. This should fix the issue: