[PATCH 0/2] fix the traced mt-exec deadlock

From	Oleg Nesterov <oleg@redhat.com>
Newsgroups	linux.kernel
Subject	[PATCH 0/2] fix the traced mt-exec deadlock
Date	2017-02-13 15:20 +0100
Message-ID	<tapDY-4My-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hello,

Lets finally fix this problem, it was reported several times. I still think that
in the longer term we should (try to) rework the security hooks and (partially)
revert this change, but this is not trivial and we need something backportable
anyway.

Eric, Jann, we already discussed this change. 1/2 is the same patch I suggested 3
months ago except now it compiles and moves flush_signal_handlers() to de_thread().

Both patches ask for subsequent cleanups, see the changelogs.

Oleg.

 arch/x86/ia32/ia32_aout.c |   3 ++
 fs/binfmt_aout.c          |   3 ++
 fs/binfmt_elf.c           |   6 ++-
 fs/binfmt_elf_fdpic.c     |   4 ++
 fs/binfmt_flat.c          |   3 ++
 fs/exec.c                 | 128 +++++++++++++++++++++++-----------------------
 include/linux/binfmts.h   |   1 +
 kernel/exit.c             |   5 +-
 kernel/signal.c           |  21 +++++---
 9 files changed, 101 insertions(+), 73 deletions(-)

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[PATCH 0/2] fix the traced mt-exec deadlock Oleg Nesterov <oleg@redhat.com> - 2017-02-13 15:20 +0100
  [PATCH 1/2] exec: don't wait for zombie threads with  cred_guard_mutex held Oleg Nesterov <oleg@redhat.com> - 2017-02-13 15:20 +0100
    Re: [PATCH 1/2] exec: don't wait for zombie threads with  cred_guard_mutex held kbuild test robot <lkp@intel.com> - 2017-02-13 17:10 +0100
      Re: [PATCH 1/2] exec: don't wait for zombie threads with  cred_guard_mutex held Oleg Nesterov <oleg@redhat.com> - 2017-02-13 17:50 +0100
    Re: [PATCH 1/2] exec: don't wait for zombie threads with  cred_guard_mutex held kbuild test robot <lkp@intel.com> - 2017-02-13 17:50 +0100
    Re: [PATCH 1/2] exec: don't wait for zombie threads with  cred_guard_mutex held Oleg Nesterov <oleg@redhat.com> - 2017-02-13 19:10 +0100
    [PATCH V2 1/2] exec: don't wait for zombie threads with  cred_guard_mutex held Oleg Nesterov <oleg@redhat.com> - 2017-02-13 19:10 +0100
      Re: [PATCH V2 1/2] exec: don't wait for zombie threads with cred_guard_mutex held ebiederm@xmission.com (Eric W. Biederman) - 2017-02-16 12:50 +0100
        Re: [PATCH V2 1/2] exec: don't wait for zombie threads with         cred_guard_mutex held Oleg Nesterov <oleg@redhat.com> - 2017-02-20 16:30 +0100
          Re: [PATCH V2 1/2] exec: don't wait for zombie threads with         cred_guard_mutex held Oleg Nesterov <oleg@redhat.com> - 2017-02-20 16:40 +0100
          Re: [PATCH V2 1/2] exec: don't wait for zombie threads with cred_guard_mutex held ebiederm@xmission.com (Eric W. Biederman) - 2017-02-20 23:40 +0100
            Re: [PATCH V2 1/2] exec: don't wait for zombie threads with         cred_guard_mutex held Oleg Nesterov <oleg@redhat.com> - 2017-02-21 19:00 +0100
              Re: [PATCH V2 1/2] exec: don't wait for zombie threads with cred_guard_mutex held ebiederm@xmission.com (Eric W. Biederman) - 2017-02-21 21:30 +0100
                Re: [PATCH V2 1/2] exec: don't wait for zombie threads with         cred_guard_mutex held Oleg Nesterov <oleg@redhat.com> - 2017-02-22 19:10 +0100
      Re: [PATCH V2 1/2] exec: don't wait for zombie threads with cred_guard_mutex held ebiederm@xmission.com (Eric W. Biederman) - 2017-02-17 05:50 +0100
        Re: [PATCH V2 1/2] exec: don't wait for zombie threads with         cred_guard_mutex held Oleg Nesterov <oleg@redhat.com> - 2017-02-20 17:00 +0100
  Re: [PATCH 0/2] fix the traced mt-exec deadlock Oleg Nesterov <oleg@redhat.com> - 2017-02-24 17:20 +0100

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