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

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On Sat, Nov 21, 2020 at 11:22:49PM +0100, Florian Westphal wrote:
Cong Wang <xiyou.wangcong@xxxxxxxxx> wrote:
From: Cong Wang <cong.wang@xxxxxxxxxxxxx>

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.

Queued for 5.4 and 4.19, thanks!

--
Thanks,
Sasha



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