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From: greg@kroah.com (Greg KH)
To: linux-arm-kernel@lists.infradead.org
Subject: [stable:PATCH 1/2] arm64: kernel: Save and restore addr_limit on exception entry
Date: Sun, 14 Aug 2016 17:54:32 +0200	[thread overview]
Message-ID: <20160814155432.GA27321@kroah.com> (raw)
In-Reply-To: <1471025480-10394-1-git-send-email-james.morse@arm.com>

On Fri, Aug 12, 2016 at 07:11:19PM +0100, James Morse wrote:
> commit e19a6ee2460bdd0d0055a6029383422773f9999a upstream.
> 
> If we take an exception while at EL1, the exception handler inherits
> the original context's addr_limit value. To be consistent always reset
> addr_limit and PSTATE.UAO on (re-)entry to EL1. This prevents accidental
> re-use of the original context's addr_limit.
> 
> Based on a similar patch for arm from Russell King.
> 
> Acked-by: Will Deacon <will.deacon@arm.com>
> Reviewed-by: Mark Rutland <mark.rutland@arm.com>
> Signed-off-by: James Morse <james.morse@arm.com>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> [ backport to stop perf misusing inherited addr_limit.
>   Removed code interacting with UAO and the irqstack ]
> Link: https://bugs.chromium.org/p/project-zero/issues/detail?id=822
> Signed-off-by: James Morse <james.morse@arm.com>
> Cc: <stable@vger.kernel.org> #4.1

Fails to apply to 4.4-stable, can you provide a backport for both of
these to that tree if you want them there?

thanks,

greg k-h

WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <greg@kroah.com>
To: James Morse <james.morse@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
	Will Deacon <will.deacon@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	stable@vger.kernel.org
Subject: Re: [stable:PATCH 1/2] arm64: kernel: Save and restore addr_limit on exception entry
Date: Sun, 14 Aug 2016 17:54:32 +0200	[thread overview]
Message-ID: <20160814155432.GA27321@kroah.com> (raw)
In-Reply-To: <1471025480-10394-1-git-send-email-james.morse@arm.com>

On Fri, Aug 12, 2016 at 07:11:19PM +0100, James Morse wrote:
> commit e19a6ee2460bdd0d0055a6029383422773f9999a upstream.
> 
> If we take an exception while at EL1, the exception handler inherits
> the original context's addr_limit value. To be consistent always reset
> addr_limit and PSTATE.UAO on (re-)entry to EL1. This prevents accidental
> re-use of the original context's addr_limit.
> 
> Based on a similar patch for arm from Russell King.
> 
> Acked-by: Will Deacon <will.deacon@arm.com>
> Reviewed-by: Mark Rutland <mark.rutland@arm.com>
> Signed-off-by: James Morse <james.morse@arm.com>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> [ backport to stop perf misusing inherited addr_limit.
>   Removed code interacting with UAO and the irqstack ]
> Link: https://bugs.chromium.org/p/project-zero/issues/detail?id=822
> Signed-off-by: James Morse <james.morse@arm.com>
> Cc: <stable@vger.kernel.org> #4.1

Fails to apply to 4.4-stable, can you provide a backport for both of
these to that tree if you want them there?

thanks,

greg k-h

  parent reply	other threads:[~2016-08-14 15:54 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-12 18:11 [stable:PATCH 1/2] arm64: kernel: Save and restore addr_limit on exception entry James Morse
2016-08-12 18:11 ` James Morse
2016-08-12 18:11 ` [stable:PATCH 2/2] " James Morse
2016-08-12 18:11   ` James Morse
2016-08-14 15:27 ` [E] [stable:PATCH 1/2] " Levin, Alexander
2016-08-14 15:54 ` Greg KH [this message]
2016-08-14 15:54   ` Greg KH
2016-08-15 16:45   ` James Morse
2016-08-15 16:45     ` James Morse
2016-08-17 12:50     ` Greg KH
2016-08-17 12:50       ` Greg KH

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