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From: Kristof Provost <kp@FreeBSD.org>
Date: Sun, 21 Oct 2018 16:51:35 +0000 (UTC)
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Subject: svn commit: r339547 - head/sys/net
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Author: kp
Date: Sun Oct 21 16:51:35 2018
New Revision: 339547
URL: https://svnweb.freebsd.org/changeset/base/339547

Log:
  vlan: Fix panic with lagg and vlan
  
  vlan_lladdr_fn() is called from taskqueue, which means there's no vnet context
  set. We can end up trying to send ARP messages (through the iflladdr_event
  event), which requires a vnet context.
  
  PR:		227654
  MFC after:	3 days

Modified:
  head/sys/net/if_vlan.c

Modified: head/sys/net/if_vlan.c
==============================================================================
--- head/sys/net/if_vlan.c	Sun Oct 21 16:49:49 2018	(r339546)
+++ head/sys/net/if_vlan.c	Sun Oct 21 16:51:35 2018	(r339547)
@@ -1302,8 +1302,13 @@ vlan_lladdr_fn(void *arg, int pending __unused)
 
 	ifv = (struct ifvlan *)arg;
 	ifp = ifv->ifv_ifp;
+
+	CURVNET_SET(ifp->if_vnet);
+
 	/* The ifv_ifp already has the lladdr copied in. */
 	if_setlladdr(ifp, IF_LLADDR(ifp), ifp->if_addrlen);
+
+	CURVNET_RESTORE();
 }
 
 static int