From: Matteo Croce <[email protected]> Date: Mon, 1 Jul 2019 19:01:55 +0200
> Avoid the situation where an IPV6 only flag is applied to an IPv4 address: > > # ip addr add 192.0.2.1/24 dev dummy0 nodad home mngtmpaddr noprefixroute > # ip -4 addr show dev dummy0 > 2: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state > UNKNOWN group default qlen 1000 > inet 192.0.2.1/24 scope global noprefixroute dummy0 > valid_lft forever preferred_lft forever > > Or worse, by sending a malicious netlink command: > > # ip -4 addr show dev dummy0 > 2: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state > UNKNOWN group default qlen 1000 > inet 192.0.2.1/24 scope global nodad optimistic dadfailed home > tentative mngtmpaddr noprefixroute stable-privacy dummy0 > valid_lft forever preferred_lft forever > > Signed-off-by: Matteo Croce <[email protected]> Applied and queued up for -stable, thanks Matteo.
