Re: [PATCH bpf v2 1/2] bpf, veth: xdp: fix page_pool page leak on skb-backed XDP

[Jakub Kicinski]

On Mon, 24 Aug 2026 11:06:43 +0800 Jiayuan Chen wrote:
> bpf_xdp_shrink_data() frees a released frag via __xdp_return() using
> xdp->rxq->mem.type, but that type is wrong for skb-backed XDP: the skb is
> cow'd into page_pool memory while the rxq still says MEM_TYPE_PAGE_SHARED,
> so the page_pool page is freed with page_frag_free() and we hit
> "Bad page state ... page_pool leak".

FWIW I like the idea if it can be made to work fully correctly.