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Date:      Sun, 28 Apr 2019 23:05:05 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 200319] Bridge+CARP crashes/freezes
Message-ID:  <bug-200319-7501-oCSRYQ2OBm@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-200319-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-200319-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D200319

--- Comment #16 from Kristof Provost <kp@freebsd.org> ---
Thanks Oleg,

The demo script nvass attached also worked for me to trigger the problem. I=
've
not yet tried your setup, but I'm confident it'll also work.

I think I understand the problem in general terms (but I need to look at
details for the full story). Basically, carp and bridge deadlock against ea=
ch
other because carp calls into bridge which calls into carp (or vice versa).

I believe the patch in D3133 is not correct. (See also ae@'s comment there.=
) It
removes locking protection where it should be present, and this is what see=
ms
to fix the problem.

This issue is still on my todo list, but I can't promise when I'll get the =
time
to look into it.

--=20
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