From: "Georg Kohmann (geokohma)" <geokohma@cisco.com>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"kadlec@netfilter.org" <kadlec@netfilter.org>,
"fw@strlen.de" <fw@strlen.de>,
"davem@davemloft.net" <davem@davemloft.net>,
"kuznet@ms2.inr.ac.ru" <kuznet@ms2.inr.ac.ru>,
"yoshfuji@linux-ipv6.org" <yoshfuji@linux-ipv6.org>,
"kuba@kernel.org" <kuba@kernel.org>,
"netfilter-devel@vger.kernel.org"
<netfilter-devel@vger.kernel.org>
Subject: Re: [PATCH net] netfilter: Drop fragmented ndisc packets assembled in netfilter
Date: Mon, 12 Oct 2020 14:22:03 +0000 [thread overview]
Message-ID: <a7ab5aff-7a3d-f8f8-5250-c8e2fdfbcbc2@cisco.com> (raw)
In-Reply-To: <20201012125614.GA27601@salvia>
On 12.10.2020 14:56, Pablo Neira Ayuso wrote:
> Please, Cc: netfilter-devel@vger.kernel.org for your netfilter
> patches, so patchwork can catch it there too next time.
Thank you, I will next time.
>
> On Mon, Oct 12, 2020 at 02:53:47PM +0200, Georg Kohmann wrote:
>> Fragmented ndisc packets assembled in netfilter not dropped as specified
>> in RFC 6980, section 5. This behaviour breaks TAHI IPv6 Core Conformance
>> Tests v6LC.2.1.22/23, V6LC.2.2.26/27 and V6LC.2.3.18.
>>
>> Setting IPSKB_FRAGMENTED flag during reassembly.
>>
>> References: commit b800c3b966bc ("ipv6: drop fragmented ndisc packets by
>> default (RFC 6980)")
>> Signed-off-by: Georg Kohmann <geokohma@cisco.com>
>> ---
>> net/ipv6/netfilter/nf_conntrack_reasm.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
>> index fed9666..054d287 100644
>> --- a/net/ipv6/netfilter/nf_conntrack_reasm.c
>> +++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
>> @@ -355,6 +355,7 @@ static int nf_ct_frag6_reasm(struct frag_queue *fq, struct sk_buff *skb,
>> ipv6_hdr(skb)->payload_len = htons(payload_len);
>> ipv6_change_dsfield(ipv6_hdr(skb), 0xff, ecn);
>> IP6CB(skb)->frag_max_size = sizeof(struct ipv6hdr) + fq->q.max_size;
>> + IP6CB(skb)->flags |= IP6SKB_FRAGMENTED;
>>
>> /* Yes, and fold redundant checksum back. 8) */
>> if (skb->ip_summed == CHECKSUM_COMPLETE)
>> --
>> 2.10.2
>>
prev parent reply other threads:[~2020-10-12 14:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201012125347.13011-1-geokohma@cisco.com>
2020-10-12 12:56 ` [PATCH net] netfilter: Drop fragmented ndisc packets assembled in netfilter Pablo Neira Ayuso
2020-10-12 14:22 ` Georg Kohmann (geokohma) [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=a7ab5aff-7a3d-f8f8-5250-c8e2fdfbcbc2@cisco.com \
--to=geokohma@cisco.com \
--cc=davem@davemloft.net \
--cc=fw@strlen.de \
--cc=kadlec@netfilter.org \
--cc=kuba@kernel.org \
--cc=kuznet@ms2.inr.ac.ru \
--cc=netdev@vger.kernel.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=pablo@netfilter.org \
--cc=yoshfuji@linux-ipv6.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).