3.5.7.9 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Mathias Krause <[email protected]> commit 84d73cd3fb142bf1298a8c13fd4ca50fd2432372 upstream. 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 <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Luis Henriques <[email protected]> --- net/core/rtnetlink.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 6c50ac0..8f37bec 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -981,6 +981,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, * report anything. */ ivi.spoofchk = -1; + memset(ivi.mac, 0, sizeof(ivi.mac)); if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) break; vf_mac.vf = -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
