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vxlan: fix dereference of nexthop group in nexthop update path

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fix dereference of nexthop group in fdb nexthop group
update validation path.

Fixes: 1274e1cc4226 ("vxlan: ecmp support for mac fdb entries")
Reported-by: Ido Schimmel <idosch@idosch.org>
Suggested-by: Ido Schimmel <idosch@idosch.org>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu 2020-05-30 22:17:20 -07:00 committed by David S. Miller
parent 547ce4cfb3
commit 03eaeda780
1 changed files with 2 additions and 2 deletions
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4
drivers/net/vxlan.c
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@ -881,13 +881,13 @@ static int vxlan_fdb_nh_update(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
goto err_inval;
}
if (!nh->is_group || !nh->nh_grp->mpath) {
nhg = rtnl_dereference(nh->nh_grp);
if (!nh->is_group || !nhg->mpath) {
NL_SET_ERR_MSG(extack, "Nexthop is not a multipath group");
goto err_inval;
}
/* check nexthop group family */
nhg = rtnl_dereference(nh->nh_grp);
switch (vxlan->default_dst.remote_ip.sa.sa_family) {
case AF_INET:
if (!nhg->has_v4) {