don't access unallocated memory

diff --git a/org.glite.security.proxyrenewal/src/voms.c b/org.glite.security.proxyrenewal/src/voms.c
index 367c4de..c8f2486 100644 (file)
--- a/org.glite.security.proxyrenewal/src/voms.c
+++ b/org.glite.security.proxyrenewal/src/voms.c
@@ -133,7 +133,7 @@ create_voms_command(glite_renewal_core_context ctx, struct vomsdata *vd, struct
 
    attribs = (*voms_cert)->std;
 
-   if (strcmp (attribs[0]->role, "NULL") == 0 )
+   if (attribs[0]->role == NULL || strcmp (attribs[0]->role, "NULL") == 0 )
       ret = asprintf(command, "G%s", attribs[0]->group);
    else
       ret = asprintf(command, "B%s:%s", attribs[0]->group, attribs[0]->role);