From: <gregkh@linuxfoundation.org>
To: ard.biesheuvel@linaro.org, gregkh@linuxfoundation.org,
nicolas.dechesne@linaro.org, stable@vger.kernel.org,
will.deacon@arm.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "arm64: mm: don't write garbage into TTBR1_EL1 register" has been added to the 4.4-stable tree
Date: Mon, 26 Feb 2018 14:02:54 +0100 [thread overview]
Message-ID: <151965017447176@kroah.com> (raw)
In-Reply-To: <20180223182902.24873-1-ard.biesheuvel@linaro.org>
This is a note to let you know that I've just added the patch titled
arm64: mm: don't write garbage into TTBR1_EL1 register
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-mm-don-t-write-garbage-into-ttbr1_el1-register.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From ard.biesheuvel@linaro.org Mon Feb 26 13:53:22 2018
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Fri, 23 Feb 2018 18:29:02 +0000
Subject: arm64: mm: don't write garbage into TTBR1_EL1 register
To: linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, will.deacon@arm.com, marc.zyngier@arm.com, mark.rutland@arm.com, nicolas.dechesne@linaro.org, gregkh@linuxfoundation.org, Ard Biesheuvel <ard.biesheuvel@linaro.org>
Message-ID: <20180223182902.24873-1-ard.biesheuvel@linaro.org>
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Stable backport commit 173358a49173 ("arm64: kpti: Add ->enable callback
to remap swapper using nG mappings") of upstream commit f992b4dfd58b did
not survive the backporting process unscathed, and ends up writing garbage
into the TTBR1_EL1 register, rather than pointing it to the zero page to
disable translations. Fix that.
Cc: <stable@vger.kernel.org> #v4.14
Reported-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm64/mm/proc.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index 08572f95bd8a..2b473ddeb7a3 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -155,7 +155,7 @@ ENDPROC(cpu_do_switch_mm)
.macro __idmap_cpu_set_reserved_ttbr1, tmp1, tmp2
adrp \tmp1, empty_zero_page
- msr ttbr1_el1, \tmp2
+ msr ttbr1_el1, \tmp1
isb
tlbi vmalle1
dsb nsh
--
2.11.0
Patches currently in stable-queue which might be from ard.biesheuvel@linaro.org are
queue-4.4/arm64-mm-don-t-write-garbage-into-ttbr1_el1-register.patch
next prev parent reply other threads:[~2018-02-26 13:02 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-23 18:29 [PATCH -stable] arm64: mm: don't write garbage into TTBR1_EL1 register Ard Biesheuvel
2018-02-23 20:33 ` Nicolas Dechesne
2018-02-24 8:34 ` Greg KH
2018-02-24 8:34 ` Greg KH
2018-02-24 8:49 ` Nicolas Dechesne
2018-02-24 8:49 ` Nicolas Dechesne
2018-02-24 8:50 ` Ard Biesheuvel
2018-02-24 8:50 ` Ard Biesheuvel
2018-02-26 11:30 ` Will Deacon
2018-02-26 11:30 ` Will Deacon
2018-02-26 11:37 ` Ard Biesheuvel
2018-02-26 11:37 ` Ard Biesheuvel
2018-02-28 10:23 ` Jan Glauber
2018-02-28 10:23 ` Jan Glauber
2018-02-26 13:02 ` Patch "arm64: mm: don't write garbage into TTBR1_EL1 register" has been added to the 4.14-stable tree gregkh
2018-02-26 13:02 ` Patch "arm64: mm: don't write garbage into TTBR1_EL1 register" has been added to the 4.15-stable tree gregkh
2018-02-26 13:02 ` gregkh [this message]
2018-02-26 13:09 ` Patch "arm64: mm: don't write garbage into TTBR1_EL1 register" has been added to the 4.4-stable tree Ard Biesheuvel
2018-02-26 14:26 ` Greg Kroah-Hartman
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