From: Kees Cook <kees@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Huacai Chen <chenhuacai@kernel.org>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
Mark Rutland <mark.rutland@arm.com>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
Ard Biesheuvel <ardb@kernel.org>,
Jeremy Linton <jeremy.linton@arm.com>,
David Laight <david.laight.linux@gmail.com>,
Thomas Gleixner <tglx@kernel.org>,
Ryan Roberts <ryan.roberts@arm.com>
Cc: Kees Cook <kees@kernel.org>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev,
linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org,
linux-s390@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH v5 0/2] Fix bugs and performance of kstack offset randomisation
Date: Tue, 24 Mar 2026 21:14:20 -0700 [thread overview]
Message-ID: <177441205756.1333400.7749975219620417508.b4-ty@kernel.org> (raw)
In-Reply-To: <20260303150840.3789438-1-ryan.roberts@arm.com>
On Tue, 03 Mar 2026 15:08:37 +0000, Ryan Roberts wrote:
> [Kees; I'm hoping this is now good-to-go via your hardening tree? It would be
> good to get some linux-next testing.]
>
> Hi All,
>
> As I reported at [1], kstack offset randomisation suffers from a couple of bugs
> and, on arm64 at least, the performance is poor. This series attempts to fix
> both; patch 1 provides back-portable fixes for the functional bugs. Patch 2
> proposes a performance improvement approach.
>
> [...]
Sorry for the delay! Applied to for-next/hardening, thanks. :)
[1/2] randomize_kstack: Maintain kstack_offset per task
https://git.kernel.org/kees/c/37beb4256016
[2/2] randomize_kstack: Unify random source across arches
https://git.kernel.org/kees/c/a96ef5848cb0
Take care,
--
Kees Cook
prev parent reply other threads:[~2026-03-25 4:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-03 15:08 [PATCH v5 0/2] Fix bugs and performance of kstack offset randomisation Ryan Roberts
2026-03-03 15:08 ` [PATCH v5 1/2] randomize_kstack: Maintain kstack_offset per task Ryan Roberts
2026-03-03 15:08 ` [PATCH v5 2/2] randomize_kstack: Unify random source across arches Ryan Roberts
2026-03-11 8:32 ` [PATCH v5 0/2] Fix bugs and performance of kstack offset randomisation Ryan Roberts
2026-03-25 4:14 ` Kees Cook [this message]
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