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Date:      Sun, 02 Jul 2023 11:59:29 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 272319] FreeBSD kernel crash on MPD5 restart with PPP configuration.
Message-ID:  <bug-272319-7501-QpMnweVJGK@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-272319-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-272319-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D272319

--- Comment #8 from Aleksandr Fedorov <afedorov@FreeBSD.org> ---
I think fix should look like this:

diff --git a/sys/netgraph/ng_ksocket.c b/sys/netgraph/ng_ksocket.c
index ba9845410e42..7074549ae403 100644
--- a/sys/netgraph/ng_ksocket.c
+++ b/sys/netgraph/ng_ksocket.c
@@ -936,12 +936,18 @@ ng_ksocket_shutdown(node_p node)

        /* Close our socket (if any) */
        if (priv->so !=3D NULL) {
-               SOCKBUF_LOCK(&priv->so->so_rcv);
-               soupcall_clear(priv->so, SO_RCV);
-               SOCKBUF_UNLOCK(&priv->so->so_rcv);
-               SOCKBUF_LOCK(&priv->so->so_snd);
-               soupcall_clear(priv->so, SO_SND);
-               SOCKBUF_UNLOCK(&priv->so->so_snd);
+               /*
+                * SOLISTENNIG sockets doesn't have data upcalls.
+                */
+               if (!SOLISTENING(priv->so)) {
+                       SOCKBUF_LOCK(&priv->so->so_rcv);
+                       soupcall_clear(priv->so, SO_RCV);
+                       SOCKBUF_UNLOCK(&priv->so->so_rcv);
+                       SOCKBUF_LOCK(&priv->so->so_snd);
+                       soupcall_clear(priv->so, SO_SND);
+                       SOCKBUF_UNLOCK(&priv->so->so_snd);
+               }
+
                soclose(priv->so);
                priv->so =3D NULL;
        }

--=20
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