From 49ab278b6fe05be5e2cf3e9be9dee7e4b81b3870 Mon Sep 17 00:00:00 2001
From: Holger Hans Peter Freyther <zecke@selfish.org>
Date: Mon, 5 Jul 2010 11:38:37 +0800
Subject: [PATCH] bsc_api: Only forward L3 messages when the channel is active

Avoid forwarding messages from a channel that is already being
closed. Harald has forwarded a crash report where this was failing.
---
 openbsc/src/bsc_api.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/openbsc/src/bsc_api.c b/openbsc/src/bsc_api.c
index 856dc615c..2cb3b1a96 100644
--- a/openbsc/src/bsc_api.c
+++ b/openbsc/src/bsc_api.c
@@ -29,6 +29,7 @@
 #include <openbsc/abis_rsl.h>
 #include <openbsc/chan_alloc.h>
 #include <openbsc/handover.h>
+#include <openbsc/debug.h>
 
 #include <osmocore/talloc.h>
 
@@ -94,6 +95,12 @@ int gsm0408_rcvmsg(struct msgb *msg, uint8_t link_id)
 	struct gsm_lchan *lchan;
 
 	lchan = msg->lchan;
+	if (lchan->state != LCHAN_S_ACTIVE) {
+		LOGP(DRSL, LOGL_ERROR, "Got data in non active state. discarding.\n");
+		return -1;
+	}
+
+
 	if (lchan->conn) {
 		api->dtap(lchan->conn, msg);
 	} else {