diff options
| author | Mathias Krause <minipli@googlemail.com> | 2013-03-09 05:52:20 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-20 12:58:54 -0700 |
| commit | 3385fcdbf46ec6fbbcefffd41ac10a8c4daafd32 (patch) | |
| tree | 82fd30a23ef568373f23caf241473ea5a971ec9f | |
| parent | 2f401a6d4d0bebbb5e80711305d1f4904f192cee (diff) | |
rtnl: fix info leak on RTM_GETLINK request for VF devices
[ Upstream commit 84d73cd3fb142bf1298a8c13fd4ca50fd2432372 ]
Initialize the mac address buffer with 0 as the driver specific function
will probably not fill the whole buffer. In fact, all in-kernel drivers
fill only ETH_ALEN of the MAX_ADDR_LEN bytes, i.e. 6 of the 32 possible
bytes. Therefore we currently leak 26 bytes of stack memory to userland
via the netlink interface.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/core/rtnetlink.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 49f281e6064..222312ec7d4 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -963,6 +963,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, struct ifla_vf_mac vf_mac; struct ifla_vf_vlan vf_vlan; struct ifla_vf_tx_rate vf_tx_rate; + memset(ivi.mac, 0, sizeof(ivi.mac)); if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) break; vf_mac.vf = vf_vlan.vf = vf_tx_rate.vf = ivi.vf; |