From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Wed, 5 Feb 2020 14:53:30 +0300
> 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>
> ---
> v2: Use rtnl_kfree_skbs() instead of kfree_skb(). From static analysis.
> Not tested, but I have audited the code pretty close and I think
> switing to rtnl_kfree_skbs() is harmless.
Applied, thanks Dan.
