Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1653792

Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI ioctl require CAP_SYS_ADMIN

From James Morris <jmorris@namei.org>
Newsgroups linux.kernel
Subject Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI ioctl require CAP_SYS_ADMIN
Date 2017-05-31 04:50 +0200
Message-ID <tN1RT-7cZ-3@gated-at.bofh.it> (permalink)
References <tMAyl-5Rs-5@gated-at.bofh.it> <tMAyl-5Rs-3@gated-at.bofh.it> <tMBkJ-6uE-1@gated-at.bofh.it> <tMCJP-7mG-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

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
<jmorris@namei.org>

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v7 2/2] security: tty: make TIOCSTI ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-29 23:40 +0200
  Re: [PATCH v7 2/2] security: tty: make TIOCSTI ioctl require  CAP_SYS_ADMIN Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-05-30 00:30 +0200
    Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Boris Lukashev <blukashev@sempervictus.com> - 2017-05-30 02:00 +0200
      Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Casey Schaufler <casey@schaufler-ca.com> - 2017-05-30 02:30 +0200
        Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-30 04:10 +0200
          Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Casey Schaufler <casey@schaufler-ca.com> - 2017-05-30 04:50 +0200
            Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-30 05:20 +0200
              Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-05-30 14:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-30 18:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Daniel Micay <danielmicay@gmail.com> - 2017-05-30 18:50 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Stephen Smalley <sds@tycho.nsa.gov> - 2017-05-30 20:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Nick Kralevich <nnk@google.com> - 2017-05-30 20:50 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-30 21:00 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Daniel Micay <danielmicay@gmail.com> - 2017-05-30 22:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-31 01:10 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Daniel Micay <danielmicay@gmail.com> - 2017-05-31 01:50 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-31 02:00 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-05-31 01:00 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-31 01:20 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-05-31 02:00 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Kees Cook <keescook@chromium.org> - 2017-06-01 04:40 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-06-01 15:10 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN "Serge E. Hallyn" <serge@hallyn.com> - 2017-06-01 19:20 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-06-01 23:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Kees Cook <keescook@chromium.org> - 2017-06-01 21:00 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-06-01 23:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-06-02 16:50 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN "Serge E. Hallyn" <serge@hallyn.com> - 2017-06-02 17:40 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-06-02 18:10 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN "Serge E. Hallyn" <serge@hallyn.com> - 2017-06-02 19:00 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-06-02 19:40 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN "Serge E. Hallyn" <serge@hallyn.com> - 2017-06-02 20:20 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-06-02 21:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Kees Cook <keescook@chromium.org> - 2017-06-02 21:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-06-02 21:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-06-02 22:10 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Nick Kralevich <nnk@google.com> - 2017-06-02 22:20 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-06-02 22:50 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make  TIOCSTI ioctl require CAP_SYS_ADMIN Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-06-04 00:10 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-06-04 00:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Peter Dolding <oiaohm@gmail.com> - 2017-06-04 05:40 +0200
              Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Casey Schaufler <casey@schaufler-ca.com> - 2017-05-30 17:30 +0200
                Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-30 18:10 +0200
        Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Boris Lukashev <blukashev@sempervictus.com> - 2017-06-04 08:30 +0200
      Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN James Morris <jmorris@namei.org> - 2017-05-31 04:50 +0200
        Re: [kernel-hardening] Re: [PATCH v7 2/2] security: tty: make TIOCSTI  ioctl require CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-31 06:20 +0200
    Re: [PATCH v7 2/2] security: tty: make TIOCSTI ioctl require  CAP_SYS_ADMIN Matt Brown <matt@nmatt.com> - 2017-05-30 02:20 +0200

csiph-web