4.17-stable review patch. If anyone has any objections, please let me know.
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From: Stephen Suryaputra ssuryaextr@gmail.com
[ Upstream commit 2f17becfbea5e9a0529b51da7345783e96e69516 ]
Use the right device to determine if redirect should be sent especially when using vrf. Same as well as when sending the redirect.
Signed-off-by: Stephen Suryaputra ssuryaextr@gmail.com Acked-by: David Ahern dsahern@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ipv6/ip6_output.c | 3 ++- net/ipv6/ndisc.c | 6 ++++++ 2 files changed, 8 insertions(+), 1 deletion(-)
--- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -507,7 +507,8 @@ int ip6_forward(struct sk_buff *skb) send redirects to source routed frames. We don't send redirects to frames decapsulated from IPsec. */ - if (skb->dev == dst->dev && opt->srcrt == 0 && !skb_sec_path(skb)) { + if (IP6CB(skb)->iif == dst->dev->ifindex && + opt->srcrt == 0 && !skb_sec_path(skb)) { struct in6_addr *target = NULL; struct inet_peer *peer; struct rt6_info *rt; --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1576,6 +1576,12 @@ void ndisc_send_redirect(struct sk_buff ops_data_buf[NDISC_OPS_REDIRECT_DATA_SPACE], *ops_data = NULL; bool ret;
+ if (netif_is_l3_master(skb->dev)) { + dev = __dev_get_by_index(dev_net(skb->dev), IPCB(skb)->iif); + if (!dev) + return; + } + if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) { ND_PRINTK(2, warn, "Redirect: no link-local address on %s\n", dev->name);