linux-kernel - Re: [GIT PULL] Please pull proc and exec work for 5.7-rc1

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Message-ID: <CAHk-=whMKC5F-=QQP=fCNRuTF+ZGiNtLEKvx7KekpK1JtrwDhw@mail.gmail.com>
Date:   Thu, 9 Apr 2020 11:36:28 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Bernd Edlinger <bernd.edlinger@...mail.de>
Cc:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        Waiman Long <longman@...hat.com>,
        Ingo Molnar <mingo@...nel.org>, Will Deacon <will@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alexey Gladkov <gladkov.alexey@...il.com>,
        Oleg Nesterov <oleg@...hat.com>
Subject: Re: [GIT PULL] Please pull proc and exec work for 5.7-rc1

On Thu, Apr 9, 2020 at 10:46 AM Bernd Edlinger
<bernd.edlinger@...mail.de> wrote:
>
> Test case 1/2 is working 2/2 is failing, deadlocking,
> I think even the time-out handler does not kill the dead-lock
> if I remember correctly.

Ok, I get

  [==========] Running 2 tests from 1 test cases.
  [ RUN      ] global.vmaccess
  [       OK ] global.vmaccess
  [ RUN      ] global.attach
  global.attach: Test terminated by timeout
  [     FAIL ] global.attach
  [==========] 1 / 2 tests passed.
  [  FAILED  ]

but reading that test it's not doing what I thought it was doing.

I thought it was doing the ptrace from within a thread. But it's doing
a proper fork() and doing the attach from the parent, just doing the
TRACEME from a thread that exits.

I guess I need to look at what that test is actually testing, because
it wasn't what I thought.

               Linus