[v3,0/2] Syscall user redirection

Message

Gabriel Krisman Bertazi July 12, 2020, 4:45 a.m. UTC

Hi,

This is the v3 of the syscall user redirection patch, applying the
suggestions from Matthew and Kees.  In particular, it modifies the ABI
to allow passing a range of allowed addresses and introduces kselftests
for the feature.

RFC/v1: https://lkml.org/lkml/2020/7/8/96
v2: https://lkml.org/lkml/2020/7/9/17

Gabriel Krisman Bertazi (2):
  kernel: Implement selective syscall userspace redirection
  selftests: Add kselftest for syscall user dispatch

 arch/Kconfig                                  |  20 ++
 arch/x86/Kconfig                              |   1 +
 arch/x86/entry/common.c                       |   5 +
 arch/x86/include/asm/thread_info.h            |   4 +-
 arch/x86/kernel/signal_compat.c               |   2 +-
 fs/exec.c                                     |   2 +
 include/linux/sched.h                         |   3 +
 include/linux/syscall_user_dispatch.h         |  50 ++++
 include/uapi/asm-generic/siginfo.h            |   3 +-
 include/uapi/linux/prctl.h                    |   5 +
 kernel/Makefile                               |   1 +
 kernel/fork.c                                 |   1 +
 kernel/sys.c                                  |   5 +
 kernel/syscall_user_dispatch.c                |  92 +++++++
 tools/testing/selftests/Makefile              |   1 +
 .../syscall_user_dispatch/.gitignore          |   1 +
 .../selftests/syscall_user_dispatch/Makefile  |   5 +
 .../selftests/syscall_user_dispatch/config    |   1 +
 .../syscall_user_dispatch.c                   | 259 ++++++++++++++++++
 19 files changed, 458 insertions(+), 3 deletions(-)
 create mode 100644 include/linux/syscall_user_dispatch.h
 create mode 100644 kernel/syscall_user_dispatch.c
 create mode 100644 tools/testing/selftests/syscall_user_dispatch/.gitignore
 create mode 100644 tools/testing/selftests/syscall_user_dispatch/Makefile
 create mode 100644 tools/testing/selftests/syscall_user_dispatch/config
 create mode 100644 tools/testing/selftests/syscall_user_dispatch/syscall_user_dispatch.c