linux-kernel - Re: [PATCH v2] kref: Avoid null pointer dereference after WARN

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Message-ID: <CAHmME9qa0rvuOfnM_-PhVB4OrUyczeRHJNtS=kfGqtG72MH+7g@mail.gmail.com>
Date:   Tue, 27 Jun 2017 21:26:51 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Andi Kleen <ak@...ux.intel.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Daniel Micay <danielmicay@...il.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] kref: Avoid null pointer dereference after WARN

On Tue, Jun 27, 2017 at 9:22 PM, Andi Kleen <ak@...ux.intel.com> wrote:
> Who would actually set mman_min_addr incorrectly?

Historically there have been quite a few bypasses of mmap_min_addr,
actually. This is well-trodden ground.