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

[Alex Bennée]

Christoffer Dall <christoffer.dall at linaro.org> 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 <peter.maydell at linaro.org>
>> Cc: Alex Bennée <alex.bennee at linaro.org>
>> Fixes: 84e690bfbed1 ("KVM: arm64: introduce vcpu->arch.debug_ptr")
>> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
>
> yikes!

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

>
> Reviewed-by: Christoffer Dall <christoffer.dall at linaro.org>

-- 
Alex Bennée