From mboxrd@z Thu Jan 1 00:00:00 1970 From: jmorris@namei.org (James Morris) Date: Wed, 31 May 2017 12:48:50 +1000 (AEST) Subject: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI ioctl require CAP_SYS_ADMIN In-Reply-To: References: <20170529213800.29438-1-matt@nmatt.com> <20170529213800.29438-3-matt@nmatt.com> <20170529232640.16211960@alans-desktop> Message-ID: To: linux-security-module@vger.kernel.org List-Id: linux-security-module.vger.kernel.org On Mon, 29 May 2017, Boris Lukashev wrote: > With all due respect sir, i believe your review falls short of the > purpose of this effort - to harden the kernel against flaws in > userspace. Which effort? Kernel self protection is about protecting against flaws in the kernel. See: https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project "This project starts with the premise that kernel bugs have a very long lifetime, and that the kernel must be designed in ways to protect against these flaws." We need to avoid conflating: - hardening the kernel against attack; and - modifying the kernel to try and harden userspace. These patches are the latter, and the case for them is not as straightforward. - James -- James Morris -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html