Stuart Henderson <[email protected]> wrote: > On 2023-05-31, Benjamin Stürz <[email protected]> wrote: > > Hi misc@, > > > > while scrolling through my /var/log/messages I found this entry: > > netstat: vfprintf %s NULL in " %2d %-5.16s" > > > > I tracked down the issue to line 278 of /usr/src/usr.bin/netstat/show.c: > >> printf(" %2d %-5.16s", rtm->rtm_priority, > >> if_indextoname(rtm->rtm_index, ifbuf)) > > It appears to me that if_indextoname(3) returns NULL for some reason, > > and that this isn't being checked. > > > > Is this intentional? Or did I find a minor bug? > > I'd guess at a race, probably the route was pointing at a virtual > interface that was removed during printing of the route table.
Still needs to be fixed, so that the code checks for NULL return before passing it as a parameter. That means figuring out what to do in that case.
