[GIT PULL] seccomp updates for v5.11-rc1

[Kees Cook]

Hi Linus,

Please pull these seccomp updates for v5.11-rc1. The major change here
is finally gaining seccomp constant-action bitmaps, which internally
reduces the seccomp overhead for many real-world syscall filters to O(1),
as discussed at Plumbers this year.

Thanks!

-Kees

The following changes since commit 4c222f31fb1db4d590503a181a6268ced9252379:

  selftests/seccomp: sh: Fix register names (2020-11-20 11:03:08 -0800)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/seccomp-v5.11-rc1

for you to fetch changes up to 2c07343abd8932200a45ff7b10950e71081e9e77:

  selftests/seccomp: Update kernel config (2020-12-02 11:20:54 -0800)

----------------------------------------------------------------
seccomp updates for v5.11-rc1

- Improve seccomp performance via constant-action bitmaps (YiFei Zhu & Kees Cook)

- Fix bogus __user annotations (Jann Horn)

- Add missed CONFIG for improved selftest coverage (Mickaël Salaün)

----------------------------------------------------------------
Jann Horn (1):
      seccomp: Remove bogus __user annotations

Kees Cook (5):
      x86: Enable seccomp architecture tracking
      selftests/seccomp: Compare bitmap vs filter overhead
      arm64: Enable seccomp architecture tracking
      arm: Enable seccomp architecture tracking
      Merge branch 'for-linus/seccomp' into for-next/seccomp

Mickaël Salaün (1):
      selftests/seccomp: Update kernel config

YiFei Zhu (10):
      seccomp/cache: Lookup syscall allowlist bitmap for fast path
      seccomp/cache: Add "emulator" to check if filter is constant allow
      csky: Enable seccomp architecture tracking
      parisc: Enable seccomp architecture tracking
      powerpc: Enable seccomp architecture tracking
      riscv: Enable seccomp architecture tracking
      s390: Enable seccomp architecture tracking
      sh: Enable seccomp architecture tracking
      xtensa: Enable seccomp architecture tracking
      seccomp/cache: Report cache data through /proc/pid/seccomp_cache

 arch/Kconfig                                       |  17 ++
 arch/arm/include/asm/Kbuild                        |   1 -
 arch/arm/include/asm/seccomp.h                     |  11 +
 arch/arm64/include/asm/seccomp.h                   |   9 +
 arch/csky/include/asm/Kbuild                       |   1 -
 arch/csky/include/asm/seccomp.h                    |  11 +
 arch/parisc/include/asm/Kbuild                     |   1 -
 arch/parisc/include/asm/seccomp.h                  |  22 ++
 arch/powerpc/include/asm/seccomp.h                 |  23 ++
 arch/riscv/include/asm/seccomp.h                   |  10 +
 arch/s390/include/asm/seccomp.h                    |   9 +
 arch/sh/include/asm/seccomp.h                      |  10 +
 arch/x86/include/asm/seccomp.h                     |  20 ++
 arch/xtensa/include/asm/Kbuild                     |   1 -
 arch/xtensa/include/asm/seccomp.h                  |  11 +
 fs/proc/base.c                                     |   6 +
 include/linux/seccomp.h                            |   7 +
 kernel/seccomp.c                                   | 296 ++++++++++++++++++++-
 tools/testing/selftests/seccomp/config             |   1 +
 .../testing/selftests/seccomp/seccomp_benchmark.c  | 151 +++++++++--
 tools/testing/selftests/seccomp/settings           |   2 +-
 21 files changed, 590 insertions(+), 30 deletions(-)
 create mode 100644 arch/arm/include/asm/seccomp.h
 create mode 100644 arch/csky/include/asm/seccomp.h
 create mode 100644 arch/parisc/include/asm/seccomp.h
 create mode 100644 arch/xtensa/include/asm/seccomp.h

-- 
Kees Cook