> On Thu, Oct 19, 2017 at 10:21:08AM +0200, Michal Kubecek wrote:
> > Commit 530903dd9003 ("ip: fix igmp parsing when iface is long") uses
> > variable len to keep trailing colon from interface name comparison. This
> > variable is local to loop body but we set it in one pass and use it in
> > following one(s) so that we are actually using (pseudo)random length for
> > comparison. This became apparent since commit b48a1161f5f9 ("ipmaddr: Avoid
> > accessing uninitialized data") always initializes len to zero so that the
> > name comparison is always true. As a result, "ip maddr show dev eth0" shows
> > IPv4 multicast addresses for all interfaces.
> > Instead of keeping the length, let's simply replace the trailing colon with
> > a null byte. The bonus is that we get correct interface name in ma.name.
> > Fixes: 530903dd9003 ("ip: fix igmp parsing when iface is long")
> > Signed-off-by: Michal Kubecek <mkube...@suse.cz>
> Acked-by: Phil Sutter <p...@nwl.cc>
Acked-by: Petr Vorel <pvo...@suse.cz>
Thanks for fixing, Michal.
Petr
