linux-kernel - [GIT PULL] seccomp fixes for v5.1-rc8

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Date:   Mon, 29 Apr 2019 12:58:36 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        James Morris <jamorris@...ux.microsoft.com>,
        syzbot+b562969adb2e04af3442@...kaller.appspotmail.com,
        Tycho Andersen <tycho@...ho.ws>
Subject: [GIT PULL] seccomp fixes for v5.1-rc8

Hi Linus,

Please pull these seccomp fixes for v5.1-rc8. Syzbot found a use-after-free
bug in seccomp due to flags that should not be allowed to be used together.
Tycho fixed this, I updated the self-tests, and the syzkaller PoC has been
running for several days without triggering KASan (before this fix, it
would reproduce). These patches have also been in -next for almost a week,
just to be sure.

Thanks!

-Kees

The following changes since commit 8c2ffd9174779014c3fe1f96d9dc3641d9175f00:

  Linux 5.1-rc2 (2019-03-24 14:02:26 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/seccomp-v5.1-rc8

for you to fetch changes up to 7a0df7fbc14505e2e2be19ed08654a09e1ed5bf6:

  seccomp: Make NEW_LISTENER and TSYNC flags exclusive (2019-04-25 15:55:58 -0700)

----------------------------------------------------------------
seccomp use-after-free fix

- Add logic for making some seccomp flags exclusive (Tycho)
- Update selftests for exclusivity testing (Kees)

----------------------------------------------------------------
Kees Cook (1):
      selftests/seccomp: Prepare for exclusive seccomp flags

Tycho Andersen (1):
      seccomp: Make NEW_LISTENER and TSYNC flags exclusive

 kernel/seccomp.c                              | 17 ++++++++++++--
 tools/testing/selftests/seccomp/seccomp_bpf.c | 34 ++++++++++++++++++++-------
 2 files changed, 40 insertions(+), 11 deletions(-)

-- 
Kees Cook