[Bugs] [Bug 1409760] Spurious failures in ./tests/basic/gfapi/bug1291259.t

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1409760

Shyamsundar <srangana at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|bugs at gluster.org            |srangana at redhat.com



--- Comment #1 from Shyamsundar <srangana at redhat.com> ---
The cause of failure or crash is as follows,

bug1291259.c calls glfs_h_poll_upcall (line 128), and checks if ret is non-zero
before calling glfs_upcall_get_reason. The latter dereferences the inarg (cbk)
and causes a crash as that is NULL.

The reason for cbk to be NULL, is due to the fact that poll_upcall has not
returned any data and still returns a ret of 0.

The consumer (the test program in this case) is meant to either check errno or
if cbk is non-NULL before processing the event. As the check is missing this
crashes at times and hence causes the regression failure.

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