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Date:   Thu, 5 Mar 2020 13:51:11 -0700
From:   Tycho Andersen <tycho@tycho.ws>
To:     Arvind Sankar <nivedita@alum.mit.edu>
Cc:     Kees Cook <keescook@chromium.org>,
        "Tobin C . Harding" <me@tobin.cc>,
        kernel-hardening@lists.openwall.com,
        Chris Zankel <chris@zankel.net>,
        Max Filippov <jcmvbkbc@gmail.com>,
        linux-xtensa@linux-xtensa.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] xtensa/mm: Stop printing the virtual memory layout
Message-ID: <20200305205111.GE6506@cisco>
References: <202003021038.8F0369D907@keescook>
 <20200305151144.836824-1-nivedita@alum.mit.edu>
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On Thu, Mar 05, 2020 at 10:11:44AM -0500, Arvind Sankar wrote:
> For security, don't display the kernel's virtual memory layout.
> 
> Kees Cook points out:
> "These have been entirely removed on other architectures, so let's
> just do the same for ia32 and remove it unconditionally."
> 
> 071929dbdd86 ("arm64: Stop printing the virtual memory layout")
> 1c31d4e96b8c ("ARM: 8820/1: mm: Stop printing the virtual memory layout")
> 31833332f798 ("m68k/mm: Stop printing the virtual memory layout")
> fd8d0ca25631 ("parisc: Hide virtual kernel memory layout")
> adb1fe9ae2ee ("mm/page_alloc: Remove kernel address exposure in free_reserved_area()")
> 
> Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>

Acked-by: Tycho Andersen <tycho@tycho.ws>