Subject: [PATCH 07/48] vxlan: correctly validate VXLAN ID against VXLAN_N_VID

From: Matthias Schiffer <[email-masked]>
Date: Thu, 23 Feb 2017 17:19:41 +0100

[ Upstream commit 4e37d6911f36545b286d15073f6f2222f840e81c ]

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 <[email-masked]>
Acked-by: Jiri Benc <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 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 30b04cf..d646775 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2626,7 +2626,7 @@ 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;
 	}
 
-- 
2.1.0