diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index 76d748c..d6f131e 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -387,6 +387,9 @@
 	 * operation taking place on the lchan.
 	 */
 	struct gsm_lchan *lchan = (struct gsm_lchan *)handler_data;
+	if (!lchan)
+		return 0;
+
 	release_loc_updating_req(lchan);
 
 	/* Free all transactions that are associated with the released lchan */
@@ -1932,7 +1935,7 @@
 	struct gsm_subscriber *subscr = param;
 	struct gsm_trans *transt, *tmp;
 	struct gsm_network *net;
-  
+
 	if (hooknum != GSM_HOOK_RR_PAGING)
 		return -EINVAL;
   
@@ -3428,7 +3431,7 @@
 						GSM48_CC_CAUSE_DEST_OOO);
 		}
 		/* Create transaction */
-		if (!(trans = talloc(tall_trans_ctx, struct gsm_trans))) {
+		if (!(trans = talloc_zero(tall_trans_ctx, struct gsm_trans))) {
 			DEBUGP(DCC, "No memory for trans.\n");
 			subscr_put(subscr);
 			/* Ressource unavailable */