From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: gromero <gromero@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org, mikey@neuling.org
Cc: cyrilbur@gmail.com, gromero@linux.vnet.ibm.com
Subject: Re: [PATCH v2 2/3] powerpc/tm: Fix restoring FP/VMX facility incorrectly on interrupts
Date: Thu, 5 Sep 2019 22:05:42 +1000 (AEST) [thread overview]
Message-ID: <46PKCC0HSGz9sP7@ozlabs.org> (raw)
In-Reply-To: <20190904045529.23002-2-gromero@linux.vnet.ibm.com>
On Wed, 2019-09-04 at 04:55:28 UTC, gromero wrote:
> From: Gustavo Romero <gromero@linux.ibm.com>
>
> When in userspace and MSR FP=0 the hardware FP state is unrelated to
> the current process. This is extended for transactions where if tbegin
> is run with FP=0, the hardware checkpoint FP state will also be
> unrelated to the current process. Due to this, we need to ensure this
> hardware checkpoint is updated with the correct state before we enable
> FP for this process.
...
>
> This fixes CVE-2019-15031.
>
> Fixes: a7771176b439 ("powerpc: Don't enable FP/Altivec if not checkpointed")
> Cc: stable@vger.kernel.org # 4.15+
> Signed-off-by: Gustavo Romero <gromero@linux.ibm.com>
> Signed-off-by: Michael Neuling <mikey@neuling.org>
Applied to powerpc fixes, thanks.
https://git.kernel.org/powerpc/c/a8318c13e79badb92bc6640704a64cc022a6eb97
cheers
next prev parent reply other threads:[~2019-09-05 12:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-03 4:47 [PATCH 1/3] powerpc/tm: Fix FP/VMX unavailable exceptions inside a transaction Michael Neuling
2019-09-03 4:47 ` [PATCH 2/3] powerpc/tm: Fix restoring FP/VMX facility incorrectly on interrupts Michael Neuling
2019-09-03 4:47 ` [PATCH 3/3] powerpc/tm: Add tm-poison test Michael Neuling
2019-09-03 11:46 ` Michael Ellerman
2019-09-04 4:59 ` Gustavo Romero
2019-09-04 4:55 ` [PATCH v2 1/3] powerpc/tm: Fix FP/VMX unavailable exceptions inside a transaction gromero
2019-09-04 4:55 ` [PATCH v2 2/3] powerpc/tm: Fix restoring FP/VMX facility incorrectly on interrupts gromero
2019-09-05 12:05 ` Michael Ellerman [this message]
2019-09-04 4:55 ` [PATCH v2 3/3] powerpc/tm: Add tm-poison test gromero
2019-09-25 11:05 ` Michael Ellerman
2019-09-05 12:05 ` [PATCH v2 1/3] powerpc/tm: Fix FP/VMX unavailable exceptions inside a transaction Michael Ellerman
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