netdev - Re: [PATCH net v4] ipv6/netfilter: Discard first fragment not including all headers

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Date:   Wed, 18 Nov 2020 19:16:55 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Georg Kohmann <geokohma@...co.com>
Cc:     netdev@...r.kernel.org, kadlec@...filter.org, fw@...len.de,
        davem@...emloft.net, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        kuba@...nel.org, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org
Subject: Re: [PATCH net v4] ipv6/netfilter: Discard first fragment not
 including all headers

Hi,

On Wed, Nov 11, 2020 at 12:50:25PM +0100, Georg Kohmann wrote:
[...]
> diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
> index c8cf1bb..e3869ba 100644
> --- a/net/ipv6/reassembly.c
> +++ b/net/ipv6/reassembly.c
> @@ -318,15 +318,43 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *skb,
>  	return -1;
>  }
>  
> +/* Check if the upper layer header is truncated in the first fragment. */
> +bool ipv6_frag_thdr_truncated(struct sk_buff *skb, int start, u8 *nexthdrp)

Please, follow up and send a patch to place this function in
include/net/ipv6_frag.h as static inline.

See: https://marc.info/?l=netfilter-devel&m=160571942728516&w=2