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Date: Thu, 31 Mar 2016 17:17:53 -0500
From: (Eric W. Biederman)
To: Linus Torvalds <>
Cc: Scott Bauer <>,  Linux Kernel Mailing List <>,  "kernel-hardening\" <>,  "the arch\/x86 maintainers" <>,  Andi Kleen <>,  Andy Lutomirski <>,  Ingo Molnar <>,  Thomas Gleixner <>,,  Abhiram Balasubramanian <>,  Scott Bauer <>
Subject: Re: [PATCH v4 1/4] SROP Mitigation: Architecture independent code for signal cookies

Linus Torvalds <> writes:

> On Thu, Mar 31, 2016 at 3:25 PM, Eric W. Biederman
> <> wrote:
>> I suspect we want this to be a per-mm attribute rather than a per-thread
>> attribute.
>> Otherwise you are breaking anything that uses a N-M threading model.
>> Which I suspect means that this implementation choice breaks all go
>> programs on linux.
> That sounds like a good point, but wouldn't it make more conceptual
> sense to make it part of "struct sighand_struct" instead?
> That is also shared for threads.

Good point.  Given this is a signal handling feature
struct sighand_struct is the natural place to put this.


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