[PATCH v2 0/6] arm64: Add audit support

[AKASHI Takahiro]

This patchset adds system call audit support on arm64.
Both 32-bit (AUIDT_ARCH_ARM[EB]) and 64-bit tasks (AUDIT_ARCH_AARCH64[EB])
are supported, but presuming 32-LE on 64-LE or 32-BE on 64-BE.

There are some prerequisites for this patch to work correctly:
* "generic compat system call audit support" patch
* "correct a type mismatch in audit_syscall_exit()" patch
   (already accepted and queued in 3.14)
* "Modify a set of system calls in audit class" patch
* userspace audit tool (v2.3.2 + my patch for arm64)

All those were already or will be soon posted separately.
Please review them as well for better understandings.

This code was tested on both 32-bit and 64-bit LE userland 
in the following two ways:
1) basic operations with auditctl/autrace
  # auditctl -a exit,always -S openat -F path=/etc/inittab
  # auditctl -a exit,always -F dir=/tmp -F perm=rw
  # auditctl -a task,always
  # autrace /bin/ls
    by comparing output from autrace with one from strace

2) audit-test-code (+ my workarounds for arm/arm64)
  by running "audit-tool", "filter" and "syscalls" test categories.

Changes v1 -> v2:
* Modified to utilize "generic compat system call audit" [3/6, 4/6, 5/6]
  Please note that a required header, unistd_32.h, is automatically
  generated from unistd32.h.
* Refer to regs->orig_x0 instead of regs->x0 as the first argument of
  system call in audit_syscall_entry() [6/6]
* Include "Add regs_return_value() in syscall.h" patch [2/6],
  which was not intentionally included in v1 because it could be added
  by "kprobes support".


AKASHI Takahiro (6):
  audit: Enable arm64 support
  arm64: Add regs_return_value() in syscall.h
  arm64: Add audit support
  arm64: audit: Add 32-bit (compat) syscall support
  arm64: audit: Add makefile rule to create unistd_32.h for compat
    syscalls
  arm64: audit: Add audit hook in ptrace/syscall_trace

 arch/arm64/Makefile                  |    4 ++++
 arch/arm64/include/asm/audit.h       |   20 ++++++++++++++++++++
 arch/arm64/include/asm/ptrace.h      |    5 +++++
 arch/arm64/include/asm/syscall.h     |   22 ++++++++++++++++++++++
 arch/arm64/include/asm/thread_info.h |    1 +
 arch/arm64/kernel/entry.S            |    3 +++
 arch/arm64/kernel/ptrace.c           |   12 ++++++++++++
 arch/arm64/kernel/syscalls/Makefile  |   20 ++++++++++++++++++++
 include/uapi/linux/audit.h           |    2 ++
 init/Kconfig                         |    2 +-
 10 files changed, 90 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm64/include/asm/audit.h
 create mode 100644 arch/arm64/kernel/syscalls/Makefile

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1.7.9.5