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From: Florian Westphal <fw@strlen.de>
To: Wei Fang <void0red@gmail.com>
Cc: pablo@netfilter.org, netfilter-devel@vger.kernel.org,
	netdev@vger.kernel.org, k.chen@smail.nju.edu.cn
Subject: Re: [nf_tables] pipapo: inserting an interval that strictly contains an existing one is accepted; rbtree rejects the same insert
Date: Tue, 11 Aug 2026 13:32:24 +0200	[thread overview]
Message-ID: <ansISMIJIOfIUrAA@strlen.de> (raw)
In-Reply-To: <CANE+tVqc+NNN8EfpK+cEYV63Pmn3OHS81PBAGqB1RHidraChLw@mail.gmail.com>

Wei Fang <void0red@gmail.com> wrote:
> The report is about inserting a *new interval that strictly
> contains an existing one*.  On a pipapo set: first insert
> [1.1.1.1..1.1.1.11), then insert [1.1.1.0..1.1.1.12).
> On the kernel under test:

There is currently no way to detect this is in an efficient
manner.

Kernel would have to lookup all combinations of
1.1.1.0..1.1.1.12: 1.1.1.1, 1.1.1.2, 1.1.1.3, ...

It checks start and end key only.

  reply	other threads:[~2026-08-11 11:32 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-11  9:58 [nf_tables] pipapo: inserting an interval that strictly contains an existing one is accepted; rbtree rejects the same insert Wei Fang
2026-08-11 10:20 ` Florian Westphal
2026-08-11 10:33   ` Wei Fang
2026-08-11 10:49     ` Florian Westphal
2026-08-11 11:27       ` Wei Fang
2026-08-11 11:32         ` Florian Westphal [this message]
2026-08-11 11:37           ` Wei Fang

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