diff options
| author | Mathias Krause <minipli@googlemail.com> | 2013-03-09 05:52:21 +0000 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2013-06-10 11:43:34 +0200 |
| commit | 0e03cad4fb451922fb5371ddec1919b491ad2b08 (patch) | |
| tree | 5c1c4310bd857e8adf4abb3c89e623f9928bef45 | |
| parent | 480cabccafcfd68837bd4423d93e1cc2b1f170d5 (diff) | |
dcbnl: fix various netlink info leaks
commit 29cd8ae0e1a39e239a3a7b67da1986add1199fc0 upstream.
The dcb netlink interface leaks stack memory in various places:
* perm_addr[] buffer is only filled at max with 12 of the 32 bytes but
copied completely,
* no in-kernel driver fills all fields of an IEEE 802.1Qaz subcommand,
so we're leaking up to 58 bytes for ieee_ets structs, up to 136 bytes
for ieee_pfc structs, etc.,
* the same is true for CEE -- no in-kernel driver fills the whole
struct,
Prevent all of the above stack info leaks by properly initializing the
buffers/structures involved.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 2.6.32: no support for IEEE or CEE commands, so only
deal with perm_addr]
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | net/dcb/dcbnl.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c index ac1205df6c86..813fe4b137e5 100644 --- a/net/dcb/dcbnl.c +++ b/net/dcb/dcbnl.c @@ -307,6 +307,7 @@ static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb, dcb->dcb_family = AF_UNSPEC; dcb->cmd = DCB_CMD_GPERM_HWADDR; + memset(perm_addr, 0, sizeof(perm_addr)); netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr); ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), |