[PATCH v10 0/3] arm64: Add audit support

[AKASHI Takahiro]

(This patchset was already acked by the maintainers, and
re-targeting v3.17. See change history.)

(I don't think that discussions below about ptrace() have impact on
this patchset.
http://lists.infradead.org/pipermail/linux-arm-kernel/2014-July/268923.html
)

This patchset adds system call audit support on arm64.
Both 32-bit (AUDIT_ARCH_ARM) and 64-bit tasks (AUDIT_ARCH_AARCH64)
are supported. Since arm64 has the exact same set of system calls
on LE and BE, we don't care about endianness (or more specifically
__AUDIT_ARCH_64BIT bit in AUDIT_ARCH_*).

This patch should work correctly with:
* userspace audit tool (v2.3.6 or later)

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 v9 -> v10:
* rebased on 3.16-rc3
* included Catalin's patch[1/3] and added more syscall definitions for 3.16

Changes v8 -> v9:
* rebased on 3.15-rc, especially due to the change of syscall_get_arch()
  interface [1,2/2]

Changes v7 -> v8:
* aligned with the change in "audit: generic compat system call audit
  support" v5 [1/2]
* aligned with the change in "arm64: split syscall_trace() into separate
  functions for enter/exit" v5 [2/2]

Changes v6 -> v7:
* changed an include file in syscall.h from <linux/audit.h> to
  <uapi/linux/audit.h> [1/2]
* aligned with the patch, "arm64: split syscall_trace() into separate
  functions for enter/exit" [2/2]

Changes v5 -> v6:
* removed and put "arm64: Add regs_return_value() in syscall.h" patch into
  a separate set
* aligned with the change in "arm64: make a single hook to syscall_trace()
  for all syscall features" v3 [1/2]

Changes v4 -> v5:
* rebased to 3.14-rcX
* added a guard against TIF_SYSCALL_AUDIT [3/3]
* aligned with the change in "arm64: make a single hook to syscall_trace()
  for all syscall features" v2 [3/3]

Changes v3 -> v4:
* Modified to sync with the patch, "make a single hook to syscall_trace()
  for all syscall features"
* aligned with "audit: Add CONFIG_HAVE_ARCH_AUDITSYSCALL" patch

Changes v2 -> v3:
* Remove asm/audit.h.
  See "generic compat syscall audit support" patch v4
* Remove endianness dependency, ie. AUDIT_ARCH_ARMEB/AARCH64EB.
* Remove kernel/syscalls/Makefile which was used to create unistd32.h.
  See Catalin's "Add __NR_* definitions for compat syscalls" patch

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 (2):
  arm64: Add audit support
  arm64: audit: Add audit hook in syscall_trace_enter/exit()

Catalin Marinas (1):
  arm64: Add __NR_* definitions for compat syscalls

 arch/arm64/Kconfig                |    2 +
 arch/arm64/include/asm/syscall.h  |   14 +
 arch/arm64/include/asm/unistd.h   |   17 +
 arch/arm64/include/asm/unistd32.h | 1166 ++++++++++++++++++++++++-------------
 arch/arm64/kernel/entry.S         |    1 -
 arch/arm64/kernel/kuser32.S       |    2 +-
 arch/arm64/kernel/ptrace.c        |    7 +
 arch/arm64/kernel/signal32.c      |    2 +-
 arch/arm64/kernel/sys_compat.c    |    2 +-
 include/uapi/linux/audit.h        |    1 +
 10 files changed, 810 insertions(+), 404 deletions(-)

-- 
1.7.9.5