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Date:      Fri, 05 Jul 2019 12:11:11 +0000
From:      bugzilla-noreply@freebsd.org
To:        testing@freebsd.org
Subject:   [Bug 238870] sys.netpfil.pf.names.names and sys.netpfil.pf.synproxy.synproxy cause panic
Message-ID:  <bug-238870-32464-YnpIHp9wRJ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-238870-32464@https.bugs.freebsd.org/bugzilla/>
References:  <bug-238870-32464@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D238870

--- Comment #7 from Kristof Provost <kp@freebsd.org> ---
Created attachment 205530
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D205530&action=
=3Dedit
ifp_dying.patch

A second experimental patch. This solves a different problem, that also
manifests during the pf tests.

It looks like there's a race, where the epair deletes its ifp while the jail
shuts down. The jail shutdown moves the ifp back into its original vnet, wh=
ile
the epair delete is causing it to be deleted. As a result we end up with a
freed ifp in V_ifnet, and when we run into it later the box panics.

I think this is likely fallout from the epoch-ification, so mmacy@ should t=
ake
a look at this.

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