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| author | Theodore Ts'o <tytso@mit.edu> | 2012-07-04 21:23:25 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-15 07:52:48 -0700 |
| commit | b8570c10637c4e3666b6da473a17fa5484d3b06c (patch) | |
| tree | 272d09594d94e40f7284a03777ab649fdb2f5f38 | |
| parent | 13789430b1125b638c1546d248784b18ca589aaa (diff) | |
| download | lwn-b8570c10637c4e3666b6da473a17fa5484d3b06c.tar.gz lwn-b8570c10637c4e3666b6da473a17fa5484d3b06c.zip | |
net: feed /dev/random with the MAC address when registering a device
commit 7bf2357524408b97fec58344caf7397f8140c3fd upstream.
Cc: David Miller <davem@davemloft.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/core/dev.c | 3 | ||||
| -rw-r--r-- | net/core/rtnetlink.c | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 1cb0d8a6aa6c..a000840850b2 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -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; @@ -4767,6 +4768,7 @@ 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); @@ -5545,6 +5547,7 @@ 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); diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 23e3f666e96d..6c50ac005241 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1384,6 +1384,7 @@ 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]) { |