dcb: Add missing error check in dcb_ieee_set()

Missing error checking before nla_parse_nested().

Reported-by: Mark Rustad <mark.d.rustad@intel.com>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index f54c784e2b5b..e954d4c6590c 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -1368,6 +1368,9 @@ static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
         if (!ops)
                 return err;
 
+        if (!tb[DCB_ATTR_IEEE])
+                return -EINVAL;
+
         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
                                tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
         if (err)