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Message-ID: <572af610-c20f-e826-f124-8df47680795b@redhat.com>
Date: Wed, 21 Feb 2018 17:35:24 -0800
From: Laura Abbott <labbott@...hat.com>
To: Mark Rutland <mark.rutland@....com>
Cc: Alexander Popov <alex.popov@...ux.com>, Kees Cook
<keescook@...omium.org>, Ard Biesheuvel <ard.biesheuvel@...aro.org>,
kernel-hardening@...ts.openwall.com, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: Clear the stack
On 02/21/2018 03:53 PM, Laura Abbott wrote:
>> I *think* this should happen in finish_ret_to_user a few lines down, since we
>> can call C code if we branch to work_pending, dirtying the stack.
>>
>
> I think you're right but this didn't immediately work when I tried it.
> I'll have to dig into this some more.
Okay I figured this out. Not corrupting registers works wonders.
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