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Date: Thu, 31 Mar 2016 17:00:24 -0500
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: Scott Bauer <sbauer@....utah.edu>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>,
"the arch/x86 maintainers" <x86@...nel.org>, Andi Kleen <ak@...ux.intel.com>,
Andy Lutomirski <luto@...capital.net>, Ingo Molnar <mingo@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>, wmealing@...hat.com,
Abhiram Balasubramanian <abhiram@...utah.edu>, Scott Bauer <sbauer@...donthack.me>
Subject: Re: [PATCH v4 1/4] SROP Mitigation: Architecture independent code for
signal cookies
On Thu, Mar 31, 2016 at 3:25 PM, Eric W. Biederman
<ebiederm@...ssion.com> 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.
Linus
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