Commit dfd1582d authored Jan 07, 2014 by Jiri Pirko Committed by David S. Miller Jan 07, 2014

ipv4: loopback device: ignore value changes after device is upped



When lo is brought up, new ifa is created. Then, devconf and neigh values
bitfield should be set so later changes of default values would not
affect lo values.

Note that the same behaviour is in ipv6. Also note that this is likely
not an issue in many distros (for example Fedora 19) because userspace
sets address to lo manually before bringing it up.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 509aba3b

net/ipv4/devinet.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1385,6 +1385,8 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
		memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
		set_ifa_lifetime(ifa, INFINITY_LIFE_TIME,
		INFINITY_LIFE_TIME);
		ipv4_devconf_setall(in_dev);
		neigh_parms_data_state_setall(in_dev->arp_parms);
		inet_insert_ifa(ifa);
		}
		}

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