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authorRoopa Prabhu <roopa@cumulusnetworks.com>2020-05-29 08:12:35 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-31 07:47:08 +0300
commit72b4868211a85d040c42444620f2197bb0094ac8 (patch)
tree139eca7b006e59b16e7c7a6367ff946c4c059ea1 /drivers/net/vxlan.c
parentd9f0d6605f30feb2f137d6bc83fcb6c2853e7fd6 (diff)
downloadlinux-72b4868211a85d040c42444620f2197bb0094ac8.tar.xz
vxlan: add check to prevent use of remote ip attributes with NDA_NH_ID
NDA_NH_ID represents a remote ip or a group of remote ips. It allows use of nexthop groups in lieu of a remote ip or a list of remote ips supported by the fdb api. Current code ignores the other remote ip attrs when NDA_NH_ID is specified. In the spirit of strict checking, This commit adds a check to explicitly return an error on incorrect usage. Fixes: 1274e1cc4226 ("vxlan: ecmp support for mac fdb entries") Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxlan.c')
-rw-r--r--drivers/net/vxlan.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index a0015cdedfaf..fe606c688855 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1196,6 +1196,10 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
struct net *net = dev_net(vxlan->dev);
int err;
+ if (tb[NDA_NH_ID] && (tb[NDA_DST] || tb[NDA_VNI] || tb[NDA_IFINDEX] ||
+ tb[NDA_PORT]))
+ return -EINVAL;
+
if (tb[NDA_DST]) {
err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
if (err)