From 2d956a82c8fd3f54fe58ce5a7b597be51c25960b Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Wed, 4 Jul 2012 21:55:23 +0200
Subject: bssgp: check for IMSI being a null pointer, not just an empty string.

---
 src/gb/gprs_bssgp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gb/gprs_bssgp.c b/src/gb/gprs_bssgp.c
index 4b8c7302..83588197 100644
--- a/src/gb/gprs_bssgp.c
+++ b/src/gb/gprs_bssgp.c
@@ -811,7 +811,7 @@ int bssgp_tx_dl_ud(struct msgb *msg, uint16_t pdu_lifetime,
 		}
 
 		/* IMSI */
-		if (strlen(dup->imsi)) {
+		if (dup->imsi && strlen(dup->imsi)) {
 			uint8_t mi[10];
 			int imsi_len = gsm48_generate_mid_from_imsi(mi, dup->imsi);
 			if (imsi_len > 2)
-- 
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