From ebb8784ec3fb40e2929987b28ca9566426632747 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 30 Mar 2025 18:39:17 +0200
Subject: [PATCH] kernel_accel: Cope with receiving freed sessions

---
 l2tpns.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/l2tpns.c b/l2tpns.c
index 9a8fd4d..df9e4c8 100644
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -1391,6 +1391,9 @@ static void set_kernel_accel(sessionidt s, int set, int now)
 
 	if (set)
 	{
+		if (t == T_FREE)
+			/* This is a session that got freed */
+			return;
 		if (tunnel[t].state == TUNNELUNDEF)
 			/* We don't know the tunnel yet */
 			return;