diff options
| author | Mathias Krause <minipli@googlemail.com> | 2013-03-09 05:52:20 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-10 05:19:26 -0400 |
| commit | 84d73cd3fb142bf1298a8c13fd4ca50fd2432372 (patch) | |
| tree | 8575649889787ab0ba141927e4e1d3c1d0c43f68 /net | |
| parent | c085c49920b2f900ba716b4ca1c1a55ece9872cc (diff) | |
| download | lwn-84d73cd3fb142bf1298a8c13fd4ca50fd2432372.tar.gz lwn-84d73cd3fb142bf1298a8c13fd4ca50fd2432372.zip | |
rtnl: fix info leak on RTM_GETLINK request for VF devices
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>
Diffstat (limited to 'net')
| -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 b376410ff259..a585d45cc9d9 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -979,6 +979,7 @@ 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 = |