gbproxy: Fix segfault for VTY delete-gbproxy-link
Currently the code segfaults when the link shall be deleted by IMSI
when the IMSI has not been set yet.
This patch adds a NULL check to skip the entry before calling
gsm48_mi_to_string,
Adresses:
Program received signal SIGSEGV, Segmentation fault.
0xb693af77 in gsm48_mi_to_string (string=0xbfffe020 "", str_len=200,
mi=0x0, mi_len=0) at gsm48.c:360
360 mi_type = mi[0] & GSM_MI_TYPE_MASK;
str_len=200, mi=0x0, mi_len=0) at gsm48.c:360
self=0x807c9a0 <delete_gb_link_by_id_cmd>, vty=0xb4303c70,
argc=3, argv=0xbfffe1c0) at gb_proxy_vty.c:670
...
Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/gprs/gb_proxy_vty.c b/openbsc/src/gprs/gb_proxy_vty.c
index 8a7523c..3042cf5 100644
--- a/openbsc/src/gprs/gb_proxy_vty.c
+++ b/openbsc/src/gprs/gb_proxy_vty.c
@@ -666,6 +666,8 @@
continue;
break;
case MATCH_IMSI:
+ if (!link_info->imsi)
+ continue;
mi_buf[0] = '\0';
gsm48_mi_to_string(mi_buf, sizeof(mi_buf),
link_info->imsi,