netdev - Re: [PATCH V5] netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250412173030.39142-1-xiafei_xupt@163.com>
Date: Sun, 13 Apr 2025 01:30:30 +0800
From: lvxiafei <xiafei_xupt@....com>
To: xiafei_xupt@....com
Cc: coreteam@...filter.org,
	davem@...emloft.net,
	edumazet@...gle.com,
	horms@...nel.org,
	kadlec@...filter.org,
	kuba@...nel.org,
	linux-kernel@...r.kernel.org,
	lvxiafei@...setime.com,
	netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org,
	pabeni@...hat.com,
	pablo@...filter.org
Subject: Re: [PATCH V5] netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_max sysctl

The limit of other netns cannot be greater than init_net netns.
    +----------------+-------------+----------------+
    | init_net netns | other netns | limit behavior |
    +----------------+-------------+----------------+
    | 0              | 0           | unlimited      |
    +----------------+-------------+----------------+
    | 0              | not 0       | other          |
    +----------------+-------------+----------------+
    | not 0          | 0           | init_net       |
    +----------------+-------------+----------------+
    | not 0          | not 0       | min            |
    +----------------+-------------+----------------+

0,0
[Apr12 17:16] init_net.ct.sysctl_max 0, net->ct.sysctl_max 0, ct_max 0
0,1
[Apr12 17:17] init_net.ct.sysctl_max 0, net->ct.sysctl_max 1, ct_max 1
[  +0.000004] nf_conntrack: nf_conntrack: table full, dropping packet
1,0
Apr12 17:18] init_net.ct.sysctl_max 1, net->ct.sysctl_max 0, ct_max 1
[  +0.000006] nf_conntrack: nf_conntrack: table full, dropping packet
1,2
[Apr12 17:19] init_net.ct.sysctl_max 1, net->ct.sysctl_max 2, ct_max 1
[  +0.000004] nf_conntrack: nf_conntrack: table full, dropping packet
2,1
[Apr12 17:21] init_net.ct.sysctl_max 2, net->ct.sysctl_max 1, ct_max 1
[  +0.000004] nf_conntrack: nf_conntrack: table full, dropping packet