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From: Kees Cook <keescook@chromium.org>
To: will@kernel.org, broonie@kernel.org, catalin.marinas@arm.com
Cc: 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 09:51:39 -0700	[thread overview]
Message-ID: <202204200951.68BC793FC3@keescook> (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!

Now un-applied! :)

-- 
Kees Cook

WARNING: multiple messages have this Message-ID (diff)
From: Kees Cook <keescook@chromium.org>
To: will@kernel.org, broonie@kernel.org, catalin.marinas@arm.com
Cc: 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 09:51:39 -0700	[thread overview]
Message-ID: <202204200951.68BC793FC3@keescook> (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!

Now un-applied! :)

-- 
Kees Cook

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2022-04-20 16:51 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-19 10:51 [PATCH v13 0/2] arm64: Enable BTI for the executable as well as the interpreter Mark Brown
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
2022-04-19 10:51   ` Mark Brown
2022-04-20 16:51   ` Kees Cook
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
2022-04-19 10:51   ` Mark Brown
2022-04-20  5:33 ` [PATCH v13 0/2] arm64: Enable BTI for the " Kees Cook
2022-04-20  5:33   ` Kees Cook
2022-04-20  9:36   ` Will Deacon
2022-04-20  9:36     ` Will Deacon
2022-04-20  9:57     ` Catalin Marinas
2022-04-20  9:57       ` Catalin Marinas
2022-04-20 11:57       ` Mark Brown
2022-04-20 11:57         ` Mark Brown
2022-04-20 13:39         ` Jeremy Linton
2022-04-20 13:39           ` Jeremy Linton
2022-04-20 16:51           ` Kees Cook
2022-04-20 16:51             ` Kees Cook
2022-04-21  9:34           ` Catalin Marinas
2022-04-21  9:34             ` Catalin Marinas
2022-04-21 15:52             ` Jeremy Linton
2022-04-21 15:52               ` Jeremy Linton
2022-04-21 17:58               ` Mark Brown
2022-04-21 17:58                 ` Mark Brown
2022-04-20 16:48     ` Kees Cook
2022-04-20 16:48       ` Kees Cook
2022-04-20 16:51   ` Kees Cook [this message]
2022-04-20 16:51     ` Kees Cook

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