Commit 36ec2150 authored by Matthias Schiffer's avatar Matthias Schiffer Committed by Greg Kroah-Hartman

vxlan: correctly validate VXLAN ID against VXLAN_N_VID

[ Upstream commit 4e37d691 ]

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

Fixes: d342894c ("vxlan: virtual extensible lan")
Signed-off-by: default avatarMatthias Schiffer <mschiffer@universe-factory.net>
Acked-by: default avatarJiri Benc <jbenc@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f4487753
......@@ -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;
}
......
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