stuck on ghak100 testsuite script

[Ondrej Mosnacek]

Hi Richard,

On Fri, Nov 9, 2018 at 11:04 PM Richard Guy Briggs <rgb at redhat.com> wrote:
> Hi Paul, Ondrej,
>
> I've got a couple of patches with two different approaches to address
> ghak100:
>         https://github.com/linux-audit/audit-kernel/issues/100
>
> The patches work, but I've not posted them yet because I wanted to
> update the audit-testsuite first to consistently test it.
>
> I've written a test to automate the regression test to add to
> audit-testsuite based on the reproducer recipe provided in ghak100.  The
> procedure in the description of ghak100 works, but I'm having some
> trouble with the script.  In particular, it is hanging the script on the
> "kill 'SIGSTOP' $pid_fuse" line.  Once it hangs, the main script, the
> test subscript and both backgrounded processes (fuse and umount) are
> still hanging around.
>
> Here's the script:
>         https://github.com/linux-audit/audit-testsuite/compare/master...rgbriggs:ghak100-missing-mount-hang
>
> Do either of you have any insight why this might be happenning and how
> to fix or work around it?
>
> A couple of minor notes:
> - The $pid_fuse += 1 is necessary since it forks from the PID reported
>   to the shell.

I don't understand... why do you expect the forked PID to be exactly
one higher? This doesn't seem to be the case in general:

$ (echo $$; exec bash -c 'echo $$' &)
10995
13693

> - The SIGSTOP is necessary to simulate the hung filesystem.
>
>
> - RGB
>
> --
> Richard Guy Briggs <rgb at redhat.com>
> Sr. S/W Engineer, Kernel Security, Base Operating Systems
> Remote, Ottawa, Red Hat Canada
> IRC: rgb, SunRaycer
> Voice: +1.647.777.2635, Internal: (81) 32635
>
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-- 
Ondrej Mosnacek <omosnace at redhat dot com>
Associate Software Engineer, Security Technologies
Red Hat, Inc.