[PATCH net v2] vxlan: correctly validate VXLAN ID against VXLAN_N_VID

[Matthias Schiffer]

The incorrect check caused an off-by-one error: the maximum VID 0xffffff
was unusable.

Fixes: d342894c5d2f ("vxlan: virtual extensible lan")
Signed-off-by: Matthias Schiffer <mschif...@universe-factory.net>
---
v2: check against VXLAN_N_VID instead of changing operator


 drivers/net/vxlan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 556953f53437..268c2a12e61d 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2675,7 +2675,7 @@ static int vxlan_validate(struct nlattr *tb[], struct 
nlattr *data[])
 
        if (data[IFLA_VXLAN_ID]) {
                __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
-               if (id >= VXLAN_VID_MASK)
+               if (id >= VXLAN_N_VID)
                        return -ERANGE;
        }
 
-- 
2.11.1