From: Kees Cook <keescook@chromium.org>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Elena Reshetova <elena.reshetova@intel.com>,
x86@kernel.org, Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Potapenko <glider@google.com>,
Alexander Popov <alex.popov@linux.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Jann Horn <jannh@google.com>,
kernel-hardening@lists.openwall.com,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 3/5] stack: Optionally randomize kernel stack offset each syscall
Date: Mon, 22 Jun 2020 14:26:25 -0700 [thread overview]
Message-ID: <202006221425.805E17B67@keescook> (raw)
In-Reply-To: <87a7b943-ed15-8521-773e-c182a37ee61e@infradead.org>
On Mon, Jun 22, 2020 at 12:40:49PM -0700, Randy Dunlap wrote:
> On 6/22/20 12:31 PM, Kees Cook wrote:
> > This provides the ability for architectures to enable kernel stack base
> > address offset randomization. This feature is controlled by the boot
> > param "randomize_kstack_offset=on/off", with its default value set by
> > CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT.
> >
> > Co-developed-by: Elena Reshetova <elena.reshetova@intel.com>
> > Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
> > Link: https://lore.kernel.org/r/20190415060918.3766-1-elena.reshetova@intel.com
> > Signed-off-by: Kees Cook <keescook@chromium.org>
> > ---
> > Makefile | 4 ++++
> > arch/Kconfig | 23 ++++++++++++++++++
> > include/linux/randomize_kstack.h | 40 ++++++++++++++++++++++++++++++++
> > init/main.c | 23 ++++++++++++++++++
> > 4 files changed, 90 insertions(+)
> > create mode 100644 include/linux/randomize_kstack.h
>
> Please add documentation for the new kernel boot parameter to
> Documentation/admin-guide/kernel-parameters.txt.
Oops, yes. Thanks for the reminder!
(I wonder if checkpatch can notice "+early_param" and suggest the Doc
update hmmm)
--
Kees Cook
next prev parent reply other threads:[~2020-06-22 21:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-22 19:31 [PATCH v4 0/5] " Kees Cook
2020-06-22 19:31 ` [PATCH v4 1/5] jump_label: Provide CONFIG-driven build state defaults Kees Cook
2020-06-22 19:31 ` [PATCH v4 2/5] init_on_alloc: Unpessimize default-on builds Kees Cook
2020-06-22 19:31 ` [PATCH v4 3/5] stack: Optionally randomize kernel stack offset each syscall Kees Cook
2020-06-22 19:40 ` Randy Dunlap
2020-06-22 21:26 ` Kees Cook [this message]
2020-06-22 20:07 ` Jann Horn
2020-06-22 21:30 ` Kees Cook
2020-06-22 21:42 ` Jann Horn
2020-06-22 22:04 ` Kees Cook
2020-06-22 22:56 ` Arvind Sankar
2020-06-22 23:07 ` Kees Cook
2020-06-23 0:05 ` Arvind Sankar
2020-06-23 0:56 ` Kees Cook
2020-06-23 13:42 ` David Laight
2020-06-23 12:38 ` Alexander Popov
2020-06-22 19:31 ` [PATCH v4 4/5] x86/entry: Enable random_kstack_offset support Kees Cook
2020-06-22 19:31 ` [PATCH v4 5/5] arm64: entry: " Kees Cook
2020-06-23 9:40 ` Mark Rutland
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