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Date: Tue, 6 Sep 2016 09:40:08 -0700
From: Andy Lutomirski <>
To: Jann Horn <>
Cc: Linus Torvalds <>, Oleg Nesterov <>, 
	Andy Lutomirski <>, "the arch/x86 maintainers" <>, 
	Linux Kernel Mailing List <>, 
	"" <>, Borislav Petkov <>, 
	Nadav Amit <>, Kees Cook <>, 
	Brian Gerst <>, 
	"" <>, Josh Poimboeuf <>, 
	Heiko Carstens <>
Subject: Re: [PATCH v3 00/13] Virtually mapped stacks with guard pages (x86, core)

On Tue, Sep 6, 2016 at 9:19 AM, Jann Horn <> wrote:
> On Thu, Jun 23, 2016 at 09:41:11AM -0700, Andy Lutomirski wrote:
>> 3. Free stacks immediately and cache them (really easy).
> Random note: task_current_syscall() (via /proc/$pid/syscall) will probably need additional
> locking when the stack is freed before the task.

Thanks.  I'm testing a patch now.

Andy Lutomirski
AMA Capital Management, LLC

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