From dfd1582d1e4d117f46df720679d595f984ef902a Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Tue, 7 Jan 2014 15:55:45 +0100 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- net/ipv4/devinet.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 0feebd5..9809f7b 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -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); } } -- 2.7.4