[RFC PATCH 0/3] mt-exec: fix deadlock with ptrace_attach()

[Oleg Nesterov]

Not for inclusion yet. 2/2 is untested, incomplete, possibly buggy.

But could you review at least the intent? Do you see any problem with
this approach?

This problem is very, very old. It seems that nobody can suggest a
simple/clean fix...

Oleg.
---

 fs/binfmt_elf.c         |   4 +-
 fs/binfmt_elf_fdpic.c   |   4 +-
 fs/binfmt_flat.c        |   4 +-
 fs/exec.c               | 142 +++++++++++++++++++++++-------------------------
 include/linux/binfmts.h |   2 +-
 kernel/exit.c           |   9 +--
 kernel/signal.c         |   6 +-
 7 files changed, 87 insertions(+), 84 deletions(-)