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Date: Mon, 20 Mar 2017 18:51:32 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Matthias Schiffer <mschiffer@...verse-factory.net>, Jiri Benc <jbenc@...hat.com>, "David S. Miller" <davem@...emloft.net> Subject: [PATCH 4.10 07/63] vxlan: correctly validate VXLAN ID against VXLAN_N_VID 4.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matthias Schiffer <mschiffer@...verse-factory.net> [ 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 <mschiffer@...verse-factory.net> Acked-by: Jiri Benc <jbenc@...hat.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/net/vxlan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2626,7 +2626,7 @@ 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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