From 78fa99103d2de97a44d277befe3d7dc9ea00c267 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Sun, 16 Aug 2015 12:35:39 +0200
Subject: LLC: Don't feed length=0 frames to SNDCP / GMM

---
 openbsc/src/gprs/gprs_llc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/openbsc/src/gprs/gprs_llc.c b/openbsc/src/gprs/gprs_llc.c
index 9b5bf4b49..2d5d9be52 100644
--- a/openbsc/src/gprs/gprs_llc.c
+++ b/openbsc/src/gprs/gprs_llc.c
@@ -679,7 +679,7 @@ int gprs_llc_rcvmsg(struct msgb *msg, struct tlv_parsed *tv)
 		return rc;
 
 	/* llhp.data is only set when we need to send LL_[UNIT]DATA_IND up */
-	if (llhp.data) {
+	if (llhp.data && llhp.data_len) {
 		msgb_gmmh(msg) = llhp.data;
 		switch (llhp.sapi) {
 		case GPRS_SAPI_GMM:
-- 
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