From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
Anshuman Khandual <anshuman.khandual@arm.com>
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
linux-kernel@vger.kernel.org, James Morse <james.morse@arm.com>
Subject: Re: [PATCH] arm64/mm: Fix ttbr0 values stored in struct thread_info for software-pan
Date: Tue, 15 Jun 2021 20:18:21 +0100 [thread overview]
Message-ID: <162378020482.22871.14339302272957309916.b4-ty@kernel.org> (raw)
In-Reply-To: <1623749578-11231-1-git-send-email-anshuman.khandual@arm.com>
On Tue, 15 Jun 2021 15:02:58 +0530, Anshuman Khandual wrote:
> When using CONFIG_ARM64_SW_TTBR0_PAN, a task's thread_info::ttbr0 must be
> the TTBR0_EL1 value used to run userspace. With 52-bit PAs, the PA must be
> packed into the TTBR using phys_to_ttbr(), but we forget to do this in some
> of the SW PAN code. Thus, if the value is installed into TTBR0_EL1 (as may
> happen in the uaccess routines), this could result in UNPREDICTABLE
> behaviour.
>
> [...]
Applied to arm64 (for-next/mm), thanks!
[1/1] arm64/mm: Fix ttbr0 values stored in struct thread_info for software-pan
https://git.kernel.org/arm64/c/9163f0113030
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
prev parent reply other threads:[~2021-06-15 19:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-15 9:32 Anshuman Khandual
2021-06-15 14:25 ` Catalin Marinas
2021-06-15 14:26 ` Will Deacon
2021-06-15 19:18 ` Will Deacon [this message]
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