Subject: [PATCH] arm64: KVM: Fix user access for debug registers

From: [email-masked] (Alex Bennée)
Date: Wed, 16 Sep 2015 15:35:55 +0100

Christoffer Dall <[email-masked]> writes:

> On Wed, Sep 16, 2015 at 11:41:10AM +0100, Marc Zyngier wrote:
>> When setting the debug register from userspace, make sure that
>> copy_from_user() is called with its parameters in the expected
>> order. It otherwise doesn't do what you think.
>> 
>> Reported-by: Peter Maydell <[email-masked]>
>> Cc: Alex Benn?e <[email-masked]>
>> Fixes: 84e690bfbed1 ("KVM: arm64: introduce vcpu->arch.debug_ptr")
>> Signed-off-by: Marc Zyngier <[email-masked]>
>
> yikes!

OK I'm now muchly confused as to how it could have worked...

>
> Reviewed-by: Christoffer Dall <[email-masked]>

-- 
Alex Benn?e