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rtnetlink: fix rtnl message size computation for XDP 

rtnl_xdp_size() only considers the size of the actual payload attribute,
and misses the space taken by the attribute used for nesting (IFLA_XDP).

Fixes: d1fdd91386 ("rtnl: add option for setting link xdp prog")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Brenden Blanco <bblanco@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sabrina Dubroca 2016-11-15 11:16:35 +01:00 committed by David S. Miller
parent 7e75f74a17
commit b3cfaa31e3
1 changed files with 2 additions and 1 deletions
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3
net/core/rtnetlink.c
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@ -901,7 +901,8 @@ static size_t rtnl_port_size(const struct net_device *dev,
static size_t rtnl_xdp_size(const struct net_device *dev)
{
size_t xdp_size = nla_total_size(1); /* XDP_ATTACHED */
size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
nla_total_size(1); /* XDP_ATTACHED */
if (!dev->netdev_ops->ndo_xdp)
return 0;