| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 104/145] vxlan: correctly validate VXLAN ID against VXLAN_N_VID | Date | Sun, 16 Apr 2017 12:49:57 +0200 |
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3.18-stable review patch. If anyone has any objections, please let me know.
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From: Matthias Schiffer <mschiffer@universe-factory.net>
commit 4e37d6911f36545b286d15073f6f2222f840e81c upstream.
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 <mschiffer@universe-factory.net> Acked-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/net/vxlan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2260,7 +2260,7 @@ static int vxlan_validate(struct nlattr 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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