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Date: Tue, 6 Sep 2016 18:19:21 +0200
From: Jann Horn <jann@...jh.net>
To: Andy Lutomirski <luto@...capital.net>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Oleg Nesterov <oleg@...hat.com>, Andy Lutomirski <luto@...nel.org>,
the arch/x86 maintainers <x86@...nel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
Borislav Petkov <bp@...en8.de>, Nadav Amit <nadav.amit@...il.com>,
Kees Cook <keescook@...omium.org>, Brian Gerst <brgerst@...il.com>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: [PATCH v3 00/13] Virtually mapped stacks with guard pages (x86,
core)
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.
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