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Date:   Fri, 17 Nov 2023 16:54:45 +0100
From:   Pablo Neira Ayuso <pablo@netfilter.org>
To:     Sixene <notsixene@gmail.com>
Cc:     netfilter@vger.kernel.org
Subject: Re: Optimize fails on a large ruleset
Message-ID: <ZVeMxYsNEgr7ZblO@calendula>
References: <CABGCCVc7Qb5U131xUL3mwGtok61=2mwMUOqpe7B_8D+S0VNngA@mail.gmail.com>
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Hi,

On Fri, Nov 17, 2023 at 03:40:09PM +0100, Sixene wrote:
> Hi,
> I hope this is the right channel to reach out for support, the wiki
> mentioned this mailing list.
> I'm having trouble optimizing my large ruleset of 26000+ lines.
> When I run 'nft -c -o -f ruleset.nft', after the while processes, I
> get the following error:
> nft: optimize.c:423: merge_verdict_stmts: Assertion `0' failed.
> Aborted (core dumped)

Please, make sure you you run on latest nftables version.

> My ruleset mostly consists of just 'ip saddr x.x.x.x/xx counter
> packets 0 bytes 0 drop'
> Hope you can help, as I'm facing very bad performance with this list,
> however I have no choice because I need to block all of these
> addresses.

Please, send a simple reproducer.

Thanks.