On Wed, Feb 5, 2020 at 3:56 AM Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:
>
> The bug is that we call kfree_skb(skb) and then pass "skb" to
> qdisc_pkt_len(skb) on the next line, which is a use after free.
> Also Cong Wang points out that it's better to delay the actual
> frees until we drop the rtnl lock so we should use rtnl_kfree_skbs()
> instead of kfree_skb().
>
> Cc: Cong Wang <xiyou.wangcong@xxxxxxxxx>
> Fixes: ec97ecf1ebe4 ("net: sched: add Flow Queue PIE packet scheduler")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Thanks!
