[Bugs] [Bug 1697971] Segfault in FUSE process, potential use after free

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1697971



--- Comment #20 from Xavi Hernandez <jahernan at redhat.com> ---
>From my debugging I think the issue is related to a missing fd_ref() when
ob_open_behind() is used. This could potentially cause a race when the same fd
is being unref'ed (refcount becoming 0) and ref'ed at the same time to handle
some open_and_resume() requests. I have not yet identified the exact sequence
of operations that cause the problem though. Knowing that the problem really
comes from here, I'll investigate further.

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