Subject: Re: [PATCH v6 00/18] arm64: return address signing

From: Rémi Denis-Courmont <[email-masked]>
Date: Tue, 10 Mar 2020 17:59:40 +0200

Hello,

Le perjantaina 6. maaliskuuta 2020, 8.35.07 EET Amit Daniel Kachhap a écrit :
> This series improves function return address protection for the arm64
> kernel, by compiling the kernel with ARMv8.3 Pointer Authentication
> instructions (referred ptrauth hereafter). This should help protect the
> kernel against attacks using return-oriented programming.

Is there any notion what the runtime overhead will be?

We tried to estimate PAuth-based return address signing and an attempt of ours 
to improve it (ArXiv:1912.04145, to be presented at DAC 2020), but we lacked 
proper hardware.

-- 
Rémi Denis-Courmont
http://www.remlab.net/

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