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Date: Tue, 8 Mar 2016 12:58:59 -0800
From: Andy Lutomirski <>
To: Scott Bauer <>
Cc: "" <>, 
	"" <>, X86 ML <>,, Andi Kleen <>, 
	Abhiram Balasubramanian <>
Subject: Re: [PATCH v3 1/3] SROP Mitigation: Architecture independent code for
 signal cookies

On Tue, Mar 8, 2016 at 12:47 PM, Scott Bauer <> wrote:
> This patch adds a per-process secret to the task struct which
> will be used during signal delivery and during a sigreturn.
> Also, logic is added in signal.c to generate, place, extract,
> clear and verify the signal cookie.

Potentially silly question: it's been a while since I read the SROP
paper, but would the technique be effectively mitigated if sigreturn
were to zero out the whole signal frame before returning to user mode?

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