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 1/3] powerpc/tm: Fix FP/VMX unavailable exceptions inside a transaction
Date: Thu, 5 Sep 2019 22:05:41 +1000 (AEST) [thread overview]
Message-ID: <46PKCB17dzz9sPG@ozlabs.org> (raw)
In-Reply-To: <20190904045529.23002-1-gromero@linux.vnet.ibm.com>
On Wed, 2019-09-04 at 04:55:27 UTC, gromero wrote:
> From: Gustavo Romero <gromero@linux.ibm.com>
>
> When we take an FP unavailable exception in a transaction we have to
> account for the hardware FP TM checkpointed registers being
> incorrect. In this case for this process we know the current and
> checkpointed FP registers must be the same (since FP wasn't used
> inside the transaction) hence in the thread_struct we copy the current
> FP registers to the checkpointed ones.
...
>
> This fixes CVE-2019-15030.
>
> Fixes: f48e91e87e67 ("powerpc/tm: Fix FP and VMX register corruption")
> Cc: stable@vger.kernel.org # 4.12+
> Signed-off-by: Gustavo Romero <gromero@linux.vnet.ibm.com>
> Signed-off-by: Michael Neuling <mikey@neuling.org>
Applied to powerpc fixes, thanks.
https://git.kernel.org/powerpc/c/8205d5d98ef7f155de211f5e2eb6ca03d95a5a60
cheers
prev parent reply other threads:[~2019-09-05 12:08 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
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 ` Michael Ellerman [this message]
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