From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
To: Arvind Sankar <nivedita@alum.mit.edu>, Kees Cook <keescook@chromium.org>
Cc: "Tobin C . Harding" <me@tobin.cc>,
Tycho Andersen <tycho@tycho.ws>,
kernel-hardening@lists.openwall.com,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sh: Stop printing the virtual memory layout
Date: Thu, 05 Mar 2020 15:18:23 +0000 [thread overview]
Message-ID: <f672417e-1323-4ef2-58a1-1158c482d569@physik.fu-berlin.de> (raw)
In-Reply-To: <20200305151010.835954-1-nivedita@alum.mit.edu>
On 3/5/20 4:10 PM, 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()")
Aww, why wasn't this made configurable? I found these memory map printouts
very useful for development.
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
WARNING: multiple messages have this Message-ID (diff)
From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
To: Arvind Sankar <nivedita@alum.mit.edu>, Kees Cook <keescook@chromium.org>
Cc: "Tobin C . Harding" <me@tobin.cc>,
Tycho Andersen <tycho@tycho.ws>,
kernel-hardening@lists.openwall.com,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sh: Stop printing the virtual memory layout
Date: Thu, 5 Mar 2020 16:18:23 +0100 [thread overview]
Message-ID: <f672417e-1323-4ef2-58a1-1158c482d569@physik.fu-berlin.de> (raw)
In-Reply-To: <20200305151010.835954-1-nivedita@alum.mit.edu>
On 3/5/20 4:10 PM, 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()")
Aww, why wasn't this made configurable? I found these memory map printouts
very useful for development.
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
next prev parent reply other threads:[~2020-03-05 15:18 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 21:50 [PATCH] x86/mm/init_32: Don't print out kernel memory layout if KASLR Arvind Sankar
2020-02-29 23:51 ` Kees Cook
2020-03-01 0:11 ` Arvind Sankar
2020-03-02 18:38 ` Kees Cook
2020-03-05 15:05 ` [PATCH] microblaze: Stop printing the virtual memory layout Arvind Sankar
2020-03-05 20:50 ` Tycho Andersen
2020-03-09 10:09 ` Michal Simek
2020-03-05 15:06 ` [PATCH] nds32/mm: " Arvind Sankar
2020-03-05 20:50 ` Tycho Andersen
2020-03-05 15:08 ` [PATCH] powerpc/32: " Arvind Sankar
2020-03-05 15:08 ` Arvind Sankar
2020-03-05 20:50 ` Tycho Andersen
2020-03-05 20:50 ` Tycho Andersen
2022-03-09 19:35 ` Christophe Leroy
2020-03-05 15:10 ` [PATCH] sh: " Arvind Sankar
2020-03-05 15:10 ` Arvind Sankar
2020-03-05 15:18 ` John Paul Adrian Glaubitz [this message]
2020-03-05 15:18 ` John Paul Adrian Glaubitz
2020-03-05 15:38 ` Joe Perches
2020-03-05 15:38 ` Joe Perches
2020-03-05 15:38 ` Joe Perches
2020-03-05 15:41 ` John Paul Adrian Glaubitz
2020-03-05 15:41 ` John Paul Adrian Glaubitz
2020-03-05 15:46 ` Arvind Sankar
2020-03-05 15:46 ` Arvind Sankar
2020-03-05 15:49 ` John Paul Adrian Glaubitz
2020-03-05 15:49 ` John Paul Adrian Glaubitz
2020-03-05 15:56 ` Arvind Sankar
2020-03-05 15:56 ` Arvind Sankar
2020-03-05 20:51 ` Tycho Andersen
2020-03-05 20:51 ` Tycho Andersen
2020-03-05 20:56 ` John Paul Adrian Glaubitz
2020-03-05 20:56 ` John Paul Adrian Glaubitz
2020-03-05 21:17 ` Kees Cook
2020-03-05 21:17 ` Kees Cook
2020-03-05 17:34 ` Kees Cook
2020-03-05 17:34 ` Kees Cook
2020-03-06 8:04 ` Geert Uytterhoeven
2020-03-06 8:04 ` Geert Uytterhoeven
2020-03-06 8:04 ` Geert Uytterhoeven
2020-03-08 12:17 ` Kaiwan N Billimoria
2020-03-08 12:29 ` Kaiwan N Billimoria
2020-03-08 12:17 ` Kaiwan N Billimoria
2020-03-05 15:11 ` [PATCH] xtensa/mm: " Arvind Sankar
2020-03-05 20:51 ` Tycho Andersen
2020-03-06 7:54 ` Max Filippov
2020-03-06 7:54 ` Max Filippov
2020-03-01 0:22 ` [PATCH v2] x86/mm/init_32: " Arvind Sankar
2020-03-02 15:29 ` Tycho Andersen
2020-03-02 18:39 ` Kees Cook
2020-03-05 15:01 ` [PATCH v3] " Arvind Sankar
2020-03-05 17:28 ` Kees Cook
2020-03-05 20:49 ` Tycho Andersen
2020-03-05 23:00 ` [tip: x86/mm] x86/mm/init/32: " tip-bot2 for Arvind Sankar
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