diff options
Diffstat (limited to 'net/can/gw.c')
| -rw-r--r-- | net/can/gw.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/can/gw.c b/net/can/gw.c index 23a3d89cad81..37528826935e 100644 --- a/net/can/gw.c +++ b/net/can/gw.c @@ -1139,6 +1139,13 @@ static int cgw_create_job(struct sk_buff *skb, struct nlmsghdr *nlh, if (gwj->dst.dev->type != ARPHRD_CAN) goto out; + /* is sending the skb back to the incoming interface intended? */ + if (gwj->src.dev == gwj->dst.dev && + !(gwj->flags & CGW_FLAGS_CAN_IIF_TX_OK)) { + err = -EINVAL; + goto out; + } + ASSERT_RTNL(); err = cgw_register_filter(net, gwj); |