This is a note to let you know that I've just added the patch titled tcp: use IPCB instead of TCP_SKB_CB in inet_exact_dif_match() to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tcp-use-ipcb-instead-of-tcp_skb_cb-in-inet_exact_dif_match.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Thu Dec 14 11:45:40 CET 2017 From: David Ahern <dsahern@xxxxxxxxx> Date: Sun, 3 Dec 2017 09:33:00 -0800 Subject: tcp: use IPCB instead of TCP_SKB_CB in inet_exact_dif_match() From: David Ahern <dsahern@xxxxxxxxx> [ Usptream commit b4d1605a8ea608fd7dc45b926a05d75d340bde4b ] After this fix : ("tcp: add tcp_v4_fill_cb()/tcp_v4_restore_cb()"), socket lookups happen while skb->cb[] has not been mangled yet by TCP. Fixes: a04a480d4392 ("net: Require exact match for TCP socket lookups if dif is l3mdev") Signed-off-by: David Ahern <dsahern@xxxxxxxxx> Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- include/net/tcp.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -874,12 +874,11 @@ static inline int tcp_v6_sdif(const stru } #endif -/* TCP_SKB_CB reference means this can not be used from early demux */ static inline bool inet_exact_dif_match(struct net *net, struct sk_buff *skb) { #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) if (!net->ipv4.sysctl_tcp_l3mdev_accept && - skb && ipv4_l3mdev_skb(TCP_SKB_CB(skb)->header.h4.flags)) + skb && ipv4_l3mdev_skb(IPCB(skb)->flags)) return true; #endif return false; Patches currently in stable-queue which might be from dsahern@xxxxxxxxx are queue-4.14/tcp-use-ipcb-instead-of-tcp_skb_cb-in-inet_exact_dif_match.patch queue-4.14/net-ipv6-fixup-device-for-anycast-routes-during-copy.patch