isdn: potential buffer overflows

cs->ics.parm.setup.phone is a 32 character array. In each of these
cases we're copying from a 35 character array into a 32 character array
so we should use strlcpy() instead of strcpy().

Signed-off-by: Dan Carpenter <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/isdn/divert/isdn_divert.c

···
 
      case DEFLECT_ALERT:
        cs->ics.command = ISDN_CMD_REDIR; /* protocol */
-       strcpy(cs->ics.parm.setup.phone,cs->deflect_dest);
+       strlcpy(cs->ics.parm.setup.phone, cs->deflect_dest, sizeof(cs->ics.parm.setup.phone));
        strcpy(cs->ics.parm.setup.eazmsn,"Testtext delayed");
        divert_if.ll_cmd(&cs->ics);
        spin_lock_irqsave(&divert_lock, flags);
···
 
      case 2: /* redir */
        del_timer(&cs->timer); 
-       strcpy(cs->ics.parm.setup.phone, to_nr);
+       strlcpy(cs->ics.parm.setup.phone, to_nr, sizeof(cs->ics.parm.setup.phone));
        strcpy(cs->ics.parm.setup.eazmsn, "Testtext manual");
        ic.command = ISDN_CMD_REDIR;
        if ((i = divert_if.ll_cmd(&ic)))
···
                if (!cs->timer.expires)
 		 { strcpy(ic->parm.setup.eazmsn,"Testtext direct");
                    ic->parm.setup.screen = dv->rule.screen;
-                   strcpy(ic->parm.setup.phone,dv->rule.to_nr);
+                   strlcpy(ic->parm.setup.phone, dv->rule.to_nr, sizeof(ic->parm.setup.phone));
                    cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */
                    cs->timer.expires = jiffies + (HZ * AUTODEL_TIME);
                    retval = 5;