From: Kees Cook <keescook@chromium.org>
To: Jason Cooper <jason@lakedaemon.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
"Roberts, William C" <william.c.roberts@intel.com>,
Yann Droneaud <ydroneaud@opteya.com>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
kernel-hardening <kernel-hardening@lists.openwall.com>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
"Theodore Ts'o" <tytso@mit.edu>, Arnd Bergmann <arnd@arndb.de>,
Greg KH <gregkh@linuxfoundation.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Ralf Baechle <ralf@linux-mips.org>,
"benh@kernel.crashing.org" <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
"David S. Miller" <davem@davemloft.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
"x86@kernel.org" <x86@kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>,
Nick Kralevich <nnk@google.com>,
Jeffrey Vander Stoep <jeffv@google.com>,
Daniel Cashman <dcashman@android.com>
Subject: Re: [PATCH v3 0/7] char/random: Simplify random address requests
Date: Wed, 3 Aug 2016 19:41:20 -0700 [thread overview]
Message-ID: <CAGXu5jK4j2=gFVd_=Spn1e_ke8_5xiWyBgKYf+NYyG5FuFDbdw@mail.gmail.com> (raw)
In-Reply-To: <20160803233913.32511-1-jason@lakedaemon.net>
On Wed, Aug 3, 2016 at 4:39 PM, Jason Cooper <jason@lakedaemon.net> wrote:
> Two previous attempts have been made to rework this API. The first can be
> found at:
>
> https://lkml.kernel.org/r/cover.1390770607.git.ydroneaud@opteya.com
>
> The second at:
>
> https://lkml.kernel.org/r/1469471141-25669-1-git-send-email-william.c.roberts@intel.com
>
> Previous versions of this series can been seen at:
>
> RFC: https://lkml.kernel.org/r/20160726030201.6775-1-jason@lakedaemon.net
> v1: https://lkml.kernel.org/r/20160728204730.27453-1-jason@lakedaemon.net
> v2: https://lkml.kernel.org/r/20160730154244.403-1-jason@lakedaemon.net
>
> In addition to incorporating ideas from these two previous efforts, this series
> adds several desirable features. First, we take the range as an argument
> directly, which removes math both before the call and inside the function.
> Second, we return the start address on error. All callers fell back to the
> start address on error, so we remove the need to check for errors. Third, we
> cap range to prevent overflow. Last, we use kerneldoc to describe the new
> function.
>
> If possible, I'd like to request Acks from the various subsystems so that we
> can merge this as one bisectable branch.
>
> Changes from v2:
> - s/randomize_addr/randomize_page/ (Kees Cook)
> - PAGE_ALIGN(start) if it wasn't (Kees Cook, Michael Ellerman)
>
> Changes from v1:
> - Explicitly mention page_aligned start assumption (Yann Droneaud)
> - pick random pages vice random addresses (Yann Droneaud)
> - catch range=0 last
> - Add Ack for arm64 (Will Deacon)
>
> Jason Cooper (7):
> random: Simplify API for random address requests
> x86: Use simpler API for random address requests
> ARM: Use simpler API for random address requests
> arm64: Use simpler API for random address requests
> tile: Use simpler API for random address requests
> unicore32: Use simpler API for random address requests
> random: Remove unused randomize_range()
>
> arch/arm/kernel/process.c | 3 +--
> arch/arm64/kernel/process.c | 8 ++------
> arch/tile/mm/mmap.c | 3 +--
> arch/unicore32/kernel/process.c | 3 +--
> arch/x86/kernel/process.c | 3 +--
> arch/x86/kernel/sys_x86_64.c | 5 +----
> drivers/char/random.c | 36 +++++++++++++++++++++++++-----------
> include/linux/random.h | 2 +-
> 8 files changed, 33 insertions(+), 30 deletions(-)
This looks great! Thanks for the v3. :)
Acked-by: Kees Cook <keescook@chromium.org>
-Kees
--
Kees Cook
Brillo & Chrome OS Security
prev parent reply other threads:[~2016-08-04 2:41 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-28 20:47 [PATCH 0/7] char/random: Simplify random address requests Jason Cooper
2016-07-28 20:47 ` [PATCH 1/7] random: Simplify API for " Jason Cooper
2016-07-29 8:59 ` Yann Droneaud
2016-07-29 18:20 ` Jason Cooper
2016-07-28 20:47 ` [PATCH 2/7] x86: Use simpler " Jason Cooper
2016-07-28 20:47 ` [PATCH 3/7] ARM: " Jason Cooper
2016-07-28 20:47 ` [PATCH 4/7] arm64: " Jason Cooper
2016-07-29 13:48 ` Will Deacon
2016-07-28 20:47 ` [PATCH 5/7] tile: " Jason Cooper
2016-07-28 20:47 ` [PATCH 6/7] unicore32: " Jason Cooper
2016-07-28 20:47 ` [PATCH 7/7] random: Remove unused randomize_range() Jason Cooper
2016-07-30 15:42 ` [PATCH v2 0/7] char/random: Simplify random address requests Jason Cooper
2016-07-30 15:42 ` [PATCH v2 1/7] random: Simplify API for " Jason Cooper
2016-07-31 16:46 ` Kees Cook
2016-07-31 20:56 ` Jason Cooper
2016-08-01 19:47 ` Kees Cook
2016-08-01 23:17 ` Jason Cooper
2016-08-02 3:35 ` [kernel-hardening] " Michael Ellerman
2016-08-03 18:42 ` Jason Cooper
2016-07-30 15:42 ` [PATCH v2 2/7] x86: Use simpler " Jason Cooper
2016-07-30 15:42 ` [PATCH v2 3/7] ARM: " Jason Cooper
2016-07-30 15:42 ` [PATCH v2 4/7] arm64: " Jason Cooper
2016-07-30 15:42 ` [PATCH v2 5/7] tile: " Jason Cooper
2016-07-30 15:42 ` [PATCH v2 6/7] unicore32: " Jason Cooper
2016-07-30 15:42 ` [PATCH v2 7/7] random: Remove unused randomize_range() Jason Cooper
2016-08-03 23:39 ` [PATCH v3 0/7] char/random: Simplify random address requests Jason Cooper
2016-08-03 23:39 ` [PATCH v3 1/7] random: Simplify API for " Jason Cooper
2016-08-04 12:47 ` Yann Droneaud
2016-08-03 23:39 ` [PATCH v3 2/7] x86: Use simpler " Jason Cooper
2016-08-03 23:39 ` [PATCH v3 3/7] ARM: " Jason Cooper
2016-08-03 23:39 ` [PATCH v3 4/7] arm64: " Jason Cooper
2016-08-03 23:39 ` [PATCH v3 5/7] tile: " Jason Cooper
2016-08-03 23:39 ` [PATCH v3 6/7] unicore32: " Jason Cooper
2016-08-03 23:39 ` [PATCH v3 7/7] random: Remove unused randomize_range() Jason Cooper
2016-08-03 23:48 ` Andrew Morton
2016-08-04 0:19 ` Jason Cooper
2016-08-04 2:41 ` Kees Cook [this message]
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