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Date:   Thu, 16 Sep 2021 11:27:02 +0200
From:   Pablo Neira Ayuso <pablo@netfilter.org>
To:     Martin Zatloukal <slezi2@pvfree.net>
Cc:     netfilter-devel@vger.kernel.org
Subject: Re: list vmap counter errot
Message-ID: <20210916092702.GA31336@salvia>
References: <ec914466-169b-b146-c216-e1faf1159068@pvfree.net>
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Hi,

On Thu, Sep 16, 2021 at 10:38:03AM +0200, Martin Zatloukal wrote:
> 
> hi. i am trying nftables for our igw and i ran into a problem.
> 
> add map ip filter forwport { type ipv4_addr . inet_proto . inet_service:
> verdict; flags interval; counter;  }
> 
> add rule ip filter FORWARD iifname $INET_IFACE ip daddr . ip protocol  . th
> dport vmap @forwport counter
> 
> if I enter
> 
> nft list ruleset
> 
> then cli send : Unauthorized Memory Access (SIGSEGV)
> 
> 
> dmesg
> 
> [ 1056.857354] nft[1069]: segfault at 10 ip 00007f44edde176d sp
> 00007ffc2cdb8fa0 error 4 in libnftables.so.1.1.0[7f44eddd8000+62000]
> 
> [ 1056.857362] Code: 89 68 10 48 89 50 38 48 83 c4 08 5b 5d c3 66 66 2e 0f
> 1f 84 00 00 00 00 00 0f 1f 40 00 48 85 ff 74 23 55 48 8b 47 10 48 89 fd <48>
> 8b 40 10 48 85 c0 74 02 ff d0 48 89 ef 5d e9 2f a4 02 00 0f 1f
> 
> if map not use flags counter,is listing ok
> 
> debian 11
> 
> libnftables1_1.0.0-1_amd64.deb
> nftables_1.0.0-1_amd64.deb

I cannot reproduce this here, valgrind and ASAN outputs are perfectly
clean?

Could you post you ldd /usr/sbin/nft output? Could you run 'nft list
ruleset' inside valgrind?  Or there is any rule that is missing in
your setup to reproduce what you are observing?