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Message-ID: <50c690fc-c967-8376-8524-ac9c1be722bc@linux.com>
Date: Fri, 13 Jul 2018 00:22:59 +0300
From: Alexander Popov <alex.popov@...ux.com>
To: Ingo Molnar <mingo@...nel.org>, Kees Cook <keescook@...omium.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>,
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Subject: Re: [PATCH v14 0/6] Introduce the STACKLEAK feature and a test for it
Hello Ingo,
On 12.07.2018 23:50, Ingo Molnar wrote:
> Let's make sure informed users have an easy runtime way out
> from the worst of the overhead that doesn't involve "recompile your distro
> kernel". Also, make it easier to measure and fingerpoint the overhead...
Would you like the following solution?
I'll create the CONFIG_STACKLEAK_RUNTIME_DISABLE config option, which would be
similar to CONFIG_SECURITY_SELINUX_DISABLE. That option will provide a sysctl
switch disabling stackleak_erase(), which provides the most of performance penalty.
I can design this as a 7th patch in this series.
Best regards,
Alexander
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