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From: Florian Westphal <fw@strlen.de>
To: praveen chaudhary <praveen5582@gmail.com>
Cc: Florian Westphal <fw@strlen.de>,
	davem@davemloft.net, kadlec@netfilter.org, pablo@netfilter.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	Zhenggen Xu <zxu@linkedin.com>,
	Andy Stracner <astracner@linkedin.com>
Subject: Re: [PATCH] [netfilter]: Fix skb->csum calculation when netfilter manipulation for NF_NAT_MANIP_SRC\DST is done on IPV6 packet.
Date: Thu, 24 Oct 2019 03:12:18 +0200	[thread overview]
Message-ID: <20191024011218.GT25052@breakpoint.cc> (raw)
In-Reply-To: <CAJ_cd4qHM3kqz24Uywpyyz0mPz7axiNZk0Q385ROd4O8XZ11fA@mail.gmail.com>

praveen chaudhary <praveen5582@gmail.com> wrote:
> inet_proto_csum_replace16 is called from many places, whereas this fix is
> applicable only for nf_nat_ipv6_csum_update. where we need to update
> skb->csum for ipv6 src/dst address change.

Under which circumstances does inet_proto_csum_replace16 upate
skb->csum correctly?

> So, I added a new function. Basically, I used a safe approach to fix it,
> without impacting other cases. Let me know other options,  I am open to
> suggestions.

You seem to imply inet_proto_csum_replace16 is fine and only broken for ipv6
nat.

  parent reply	other threads:[~2019-10-24  1:12 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-23 19:02 [PATCH] Fix skb->csum calculation when netfilter manipulation for NF_NAT_MANIP_SRC\DST is done on IPV6 packet Praveen Chaudhary
2019-10-23 19:02 ` [PATCH] [netfilter]: " Praveen Chaudhary
2019-10-23 19:33   ` Florian Westphal
2019-10-23 20:56     ` [PATCH] [netfilter]: Fix skb->csum calculation when netfilter Praveen Chaudhary
     [not found]     ` <CAJ_cd4qHM3kqz24Uywpyyz0mPz7axiNZk0Q385ROd4O8XZ11fA@mail.gmail.com>
2019-10-24  1:12       ` Florian Westphal [this message]
2019-10-24  5:19         ` Praveen Chaudhary
2019-10-28 22:27 [PATCH] [netfilter]: Fix skb->csum calculation when netfilter manipulation for NF_NAT_MANIP_SRC\DST is done on IPV6 packet Praveen Chaudhary
2019-10-28 22:27 ` Praveen Chaudhary
2019-10-29 16:09   ` Florian Westphal

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