From: Feng Sun <loyo...@gmail.com> Date: Mon, 26 Aug 2019 14:46:04 +0800
> After commit baeababb5b85d5c4e6c917efe2a1504179438d3b > ("tun: return NET_XMIT_DROP for dropped packets"), > when tun_net_xmit drop packets, it will free skb and return NET_XMIT_DROP, > netpoll_send_skb_on_dev will run into following use after free cases: > 1. retry netpoll_start_xmit with freed skb; > 2. queue freed skb in npinfo->txq. > queue_process will also run into use after free case. > > hit netpoll_send_skb_on_dev first case with following kernel log: ... > Signed-off-by: Feng Sun <loyo...@gmail.com> > Signed-off-by: Xiaojun Zhao <xiaojunzhao...@gmail.com> Applied and queued up for -stable.