[GIT PULL] seccomp fixes for v5.17-rc4

[Kees Cook]

Hi Linus,

Please pull these signal and seccomp fixes for v5.17-rc4. This fixes a
corner case of fatal SIGSYS being ignored since v5.15. Along with the
signal fix is a change to seccomp so that seeing another syscall after
a fatal filter result will cause seccomp to kill the process harder.

Thanks!

-Kees

The following changes since commit 26291c54e111ff6ba87a164d85d4a4e134b7315c:

  Linux 5.17-rc2 (2022-01-30 15:37:07 +0200)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/seccomp-v5.17-rc4

for you to fetch changes up to eed09ad261822a7bdc441ed192c6f444375e5527:

  samples/seccomp: Adjust sample to also provide kill option (2022-02-10 19:09:12 -0800)

----------------------------------------------------------------
seccomp fixes for v5.17-rc4

- Force HANDLER_EXIT even for SIGNAL_UNKILLABLE.
- Make seccomp self-destruct after fatal filter results.
- Update seccomp samples for easier behavioral demonstration.

----------------------------------------------------------------
Kees Cook (3):
      signal: HANDLER_EXIT should clear SIGNAL_UNKILLABLE
      seccomp: Invalidate seccomp mode to catch death failures
      samples/seccomp: Adjust sample to also provide kill option

 kernel/seccomp.c          | 10 ++++++++++
 kernel/signal.c           |  5 +++--
 samples/seccomp/dropper.c |  9 +++++++--
 3 files changed, 20 insertions(+), 4 deletions(-)

-- 
Kees Cook