From: Jiri Pirko Date: Tue, 7 Jan 2014 14:55:45 +0000 (+0100) Subject: ipv4: loopback device: ignore value changes after device is upped X-Git-Tag: v3.14-rc1~94^2~258 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=dfd1582d1e4d117f46df720679d595f984ef902a;p=linux.git 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 --- diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 0feebd5de295..9809f7b69728 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); } }