[PATCH v2 0/3] x86/entry: A compat syscall bugfix and some test stuff

[Andy Lutomirski]

The compat syscall argument fixup error path is wrong.  Fix it.

This also adds some sanity checks to the kernel that catch the bug
when running selftests.

Changes from v1:
 - The fix is actually correct this time, I hope

Andy Lutomirski (3):
  entry: Check that syscall entries and syscall exits match
  x86/entry: Fix entry/exit mismatch on failed fast 32-bit syscalls
  selftests/x86: Add a missing .note.GNU-stack section to thunks_32.S

 arch/x86/entry/common.c                 |  3 ++-
 include/linux/entry-common.h            | 11 +++++++++++
 include/linux/sched.h                   |  1 +
 init/init_task.c                        |  9 +++++++++
 kernel/entry/common.c                   | 25 ++++++++++++++++++++++++-
 tools/testing/selftests/x86/thunks_32.S |  2 ++
 6 files changed, 49 insertions(+), 2 deletions(-)

-- 
2.29.2