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net: feed /dev/random with the MAC address when registering a device 

Cc: David Miller <davem@davemloft.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
This commit is contained in:
Theodore Ts'o 2012-07-04 21:23:25 -04:00
parent b04b3156a2
commit 7bf2357524
2 changed files with 4 additions and 0 deletions
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3
net/core/dev.c
View File

@ -1172,6 +1172,7 @@ static int __dev_open(struct net_device *dev)
net_dmaengine_get();
dev_set_rx_mode(dev);
dev_activate(dev);
add_device_randomness(dev->dev_addr, dev->addr_len);
}
return ret;
@ -4763,6 +4764,7 @@ int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa)
err = ops->ndo_set_mac_address(dev, sa);
if (!err)
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
add_device_randomness(dev->dev_addr, dev->addr_len);
return err;
}
EXPORT_SYMBOL(dev_set_mac_address);
@ -5541,6 +5543,7 @@ int register_netdevice(struct net_device *dev)
dev_init_scheduler(dev);
dev_hold(dev);
list_netdevice(dev);
add_device_randomness(dev->dev_addr, dev->addr_len);
/* Notify protocols, that a new device appeared. */
ret = call_netdevice_notifiers(NETDEV_REGISTER, dev);

1
net/core/rtnetlink.c
View File

@ -1378,6 +1378,7 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
goto errout;
send_addr_notify = 1;
modified = 1;
add_device_randomness(dev->dev_addr, dev->addr_len);
}
if (tb[IFLA_MTU]) {