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 13:05:02 -0700 |
| commit | 78d3a467490d72c699393947f1e566fa28672947 (patch) | |
| tree | cee705e2e0e50ff854f4e6932d969379776999e2 /net | |
| parent | 47d7ed18c33cc4e9cba603c7ca776c40037ae842 (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>
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 900fc6162c4..da7b3a5592d 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -975,6 +975,7 @@ 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 = |