3.2.94-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Paul Hüber <phueber@xxxxxxxxx> commit 51fb60eb162ab84c5edf2ae9c63cf0b878e5547e upstream. l2tp_ip_backlog_recv may not return -1 if the packet gets dropped. The return value is passed up to ip_local_deliver_finish, which treats negative values as an IP protocol number for resubmission. Signed-off-by: Paul Hüber <phueber@xxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- net/l2tp/l2tp_ip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/l2tp/l2tp_ip.c +++ b/net/l2tp/l2tp_ip.c @@ -432,7 +432,7 @@ static int l2tp_ip_backlog_recv(struct s drop: IP_INC_STATS(&init_net, IPSTATS_MIB_INDISCARDS); kfree_skb(skb); - return -1; + return 0; } /* Userspace will call sendmsg() on the tunnel socket to send L2TP