From: Will Deacon <will@kernel.org>
To: Kees Cook <keescook@chromium.org>
Cc: broonie@kernel.org, catalin.marinas@arm.com,
linux-arm-kernel@lists.infradead.org, jeremy.linton@arm.com,
hjl.tools@gmail.com, libc-alpha@sourceware.org,
szabolcs.nagy@arm.com, yu-cheng.yu@intel.com,
ebiederm@xmission.com, linux-arch@vger.kernel.org
Subject: Re: [PATCH v13 0/2] arm64: Enable BTI for the executable as well as the interpreter
Date: Wed, 20 Apr 2022 10:36:13 +0100 [thread overview]
Message-ID: <20220420093612.GB6954@willie-the-truck> (raw)
In-Reply-To: <165043278356.1481705.13924459838445776007.b4-ty@chromium.org>
On Tue, Apr 19, 2022 at 10:33:06PM -0700, Kees Cook wrote:
> On Tue, 19 Apr 2022 11:51:54 +0100, Mark Brown wrote:
> > Deployments of BTI on arm64 have run into issues interacting with
> > systemd's MemoryDenyWriteExecute feature. Currently for dynamically
> > linked executables the kernel will only handle architecture specific
> > properties like BTI for the interpreter, the expectation is that the
> > interpreter will then handle any properties on the main executable.
> > For BTI this means remapping the executable segments PROT_EXEC |
> > PROT_BTI.
> >
> > [...]
>
> Applied to for-next/execve, thanks!
>
> [1/2] elf: Allow architectures to parse properties on the main executable
> https://git.kernel.org/kees/c/b2f2553c8e89
> [2/2] arm64: Enable BTI for main executable as well as the interpreter
> https://git.kernel.org/kees/c/b65c760600e2
Kees, please can you drop this series while Catalin's alternative solution
is under discussion (his Reviewed-by preceded the other patches)?
https://lore.kernel.org/r/20220413134946.2732468-1-catalin.marinas@arm.com
Both series expose new behaviours to userspace and we don't need both.
Thanks,
Will
next prev parent reply other threads:[~2022-04-20 9:36 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-19 10:51 Mark Brown
2022-04-19 10:51 ` [PATCH v13 1/2] elf: Allow architectures to parse properties on the main executable Mark Brown
2022-04-20 16:51 ` Kees Cook
2022-04-19 10:51 ` [PATCH v13 2/2] arm64: Enable BTI for main executable as well as the interpreter Mark Brown
2022-04-20 5:33 ` [PATCH v13 0/2] arm64: Enable BTI for the " Kees Cook
2022-04-20 9:36 ` Will Deacon [this message]
2022-04-20 9:57 ` Catalin Marinas
2022-04-20 11:57 ` Mark Brown
2022-04-20 13:39 ` Jeremy Linton
2022-04-20 16:51 ` Kees Cook
2022-04-21 9:34 ` Catalin Marinas
2022-04-21 15:52 ` Jeremy Linton
2022-04-21 17:58 ` Mark Brown
2022-04-20 16:48 ` Kees Cook
2022-04-20 16:51 ` Kees Cook
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