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traceroute: fix segfault when some arguments are repeated
On 2026/02/16 13:38, Florian Obser wrote:
> Nice one.
agreed! thanks peter.
> OK florian or I can commit it if someone wants to OK it.
I have committed with your ok.
> On 2026-02-14 08:17 +02, Petre Rodan <petre.rodan@subdimension.ro> wrote:
> > Hi,
> >
> > Make sure that internal counters do not go out of bounds
> > if the '-n' or '-A' options are specified more than once.
> >
> > best regards,
> > peter
> > --
> >
> > Index: traceroute.c
> > ===================================================================
> > RCS file: /cvs/src/usr.sbin/traceroute/traceroute.c,v
> > diff -u -p -r1.170 traceroute.c
> > --- traceroute.c 21 Aug 2024 15:00:25 -0000 1.170
> > +++ traceroute.c 14 Feb 2026 05:54:28 -0000
> > @@ -429,8 +429,10 @@ main(int argc, char *argv[])
> > "ADdf:g:Ilm:nP:p:q:Ss:t:V:vw:x")) != -1)
> > switch (ch) {
> > case 'A':
> > - conf->Aflag = 1;
> > - conf->expected_responses++;
> > + if (!conf->Aflag) {
> > + conf->Aflag = 1;
> > + conf->expected_responses++;
> > + }
> > break;
> > case 'd':
> > conf->dflag = 1;
> > @@ -479,8 +481,10 @@ main(int argc, char *argv[])
> > conf->first_ttl, MAXTTL);
> > break;
> > case 'n':
> > - conf->nflag = 1;
> > - conf->expected_responses--;
> > + if (!conf->nflag) {
> > + conf->nflag = 1;
> > + conf->expected_responses--;
> > + }
> > break;
> > case 'p':
> > conf->port = strtonum(optarg, 1, 65535, &errstr);
> >
>
> --
> In my defence, I have been left unsupervised.
>
traceroute: fix segfault when some arguments are repeated