Subject: Re: [Patch stable] netfilter: clear skb->next in NF_HOOK_LIST()

From: Florian Westphal <[email-masked]>
Date: Sat, 21 Nov 2020 23:22:49 +0100

Cong Wang <[email-masked]> wrote:
> From: Cong Wang <[email-masked]>
> 
> NF_HOOK_LIST() uses list_del() to remove skb from the linked list,
> however, it is not sufficient as skb->next still points to other
> skb. We should just call skb_list_del_init() to clear skb->next,
> like the rest places which using skb list.
> 
> This has been fixed in upstream by commit ca58fbe06c54
> ("netfilter: add and use nf_hook_slow_list()").

Thanks Cong, agree with this change, afaics its applicable to 4.19.y and 5.4.y.