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Date:      Thu, 08 Dec 2022 16:13:57 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 268246] crash and panic using pfsync on 13.1-RELEASE
Message-ID:  <bug-268246-227-Vpb6g6r41H@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-268246-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-268246-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D268246

--- Comment #2 from Kristof Provost <kp@freebsd.org> ---
I've not seen that panic before.

It's indeed related to pfsync. pfsyncintr() is in pfsync's output path, and=
 it
seems to be in the process of sending a packet out, during which ip_fragmen=
t()
ends up apparently dereferencing a NULL pointer.

It's not immediately obvious how this'd happen.

A few bit of extra information to gather: ifconfig output for pfsync0 and
whatever interface it's using as syndev. (I'm especially interested in MTU
mismatches, but let's get the full output.)

Given that you have a core dump it'd also be good if you could run it throu=
gh
kgdb (kgdb /boot/kernel/kernel /var/crash/vmcore.last) and get a backtrace =
(bt)
for starters. Hang on to the core dump, because odds are we're going to wan=
t to
look at more things later.

--=20
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