From: Catalin Marinas <catalin.marinas@arm.com>
To: Peter Collingbourne <pcc@google.com>, Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
Marc Zyngier <maz@kernel.org>,
stable@vger.kernel.org
Subject: Re: [PATCH] arm64: set UXN on swapper page tables
Date: Thu, 21 Jul 2022 17:19:01 +0100 [thread overview]
Message-ID: <Ytl8dbOmTA05t7lA@arm.com> (raw)
In-Reply-To: <165834388144.420659.7440428405850430601.b4-ty@arm.com>
On Wed, Jul 20, 2022 at 08:04:48PM +0100, Catalin Marinas wrote:
> On Tue, 19 Jul 2022 16:49:09 -0700, Peter Collingbourne wrote:
> > On a system that implements FEAT_EPAN, read/write access to the idmap
> > is denied because UXN is not set on the swapper PTEs. As a result,
> > idmap_kpti_install_ng_mappings panics the kernel when accessing
> > __idmap_kpti_flag. Fix it by setting UXN on these PTEs.
>
> Applied to arm64 (for-next/fixes), thanks!
>
> [1/1] arm64: set UXN on swapper page tables
> https://git.kernel.org/arm64/c/f7b4c3b82e7d
I'm dropping this patch from for-next/fixes as it breaks linux-next
(interacts badly with stuff already queued). We'll send it to -stable
separately as that's no longer needed in mainline after 5.19.
--
Catalin
prev parent reply other threads:[~2022-07-21 16:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-19 23:49 [PATCH] arm64: set UXN on swapper page tables Peter Collingbourne
2022-07-20 9:56 ` Will Deacon
2022-07-20 19:04 ` Catalin Marinas
2022-07-21 16:19 ` Catalin Marinas [this message]
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