[Bugs] [Bug 1315735] New: Tier: Possible crash/undefined behaviour if thread creation fails

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1315735

            Bug ID: 1315735
           Summary: Tier: Possible crash/undefined behaviour if thread
                    creation fails
           Product: GlusterFS
           Version: mainline
         Component: tiering
          Assignee: bugs at gluster.org
          Reporter: rkavunga at redhat.com
        QA Contact: bugs at gluster.org
                CC: bugs at gluster.org



Description of problem:

In tier_start, we  spawn two threads one for promotion and one for demotion. If
the thread creation fails we do a join with out having a value for thread
variabl. This can lead into a crash or undefined behaviour.

Version-Release number of selected component (if applicable):

mainline

How reproducible:

Mosty

Steps to Reproduce:

1.create a tier volume
2.Attach tier process into gdb
3.using a break point try creating failure for thread creation in tier_start

Actual results:

crash
Expected results:

Should behave normally

Additional info:

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