[PATCH net-next 1/1] driver: ipvlan: Add the sanity check for ipvlan mode

[fgao]

From: Gao Feng <f...@ikuai8.com>

The ipvlan mode variable "nval" is from userspace, so the ipvlan codes
should check if the mode variable "nval" is valid.

Signed-off-by: Gao Feng <f...@ikuai8.com>
---
 drivers/net/ipvlan/ipvlan_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index ab90b22..537b5a9 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -65,6 +65,9 @@ static int ipvlan_set_port_mode(struct ipvl_port *port, u16 
nval)
        struct net_device *mdev = port->dev;
        int err = 0;
 
+       if (nval >= IPVLAN_MODE_MAX)
+               return -EINVAL;
+
        ASSERT_RTNL();
        if (port->mode != nval) {
                if (nval == IPVLAN_MODE_L3S) {
-- 
1.9.1