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Date: Thu, 22 Dec 2022 11:10:05 -0800 From: Mahesh Bandewar <maheshb@...gle.com> To: Netdev <netdev@...r.kernel.org> Cc: Mahesh Bandewar <mahesh@...dewar.net>, Mahesh Bandewar <maheshb@...gle.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Soheil Hassas Yeganeh <soheil@...gle.com> Subject: [PATCH next] sysctl: expose all net/core sysctls inside netns All were not visible to the non-priv users inside netns. However, with 4ecb90090c84 ("sysctl: allow override of /proc/sys/net with CAP_NET_ADMIN"), these vars are protected from getting modified. A proc with capable(CAP_NET_ADMIN) can change the values so not having them visible inside netns is just causing nuisance to process that check certain values (e.g. net.core.somaxconn) and see different behavior in root-netns vs. other-netns Cc: "David S. Miller" <davem@...emloft.net> Cc: Eric Dumazet <edumazet@...gle.com> Cc: Jakub Kicinski <kuba@...nel.org> Cc: Paolo Abeni <pabeni@...hat.com> Cc: Soheil Hassas Yeganeh <soheil@...gle.com> Signed-off-by: Mahesh Bandewar <maheshb@...gle.com> --- net/core/sysctl_net_core.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c index 5b1ce656baa1..e7b98162c632 100644 --- a/net/core/sysctl_net_core.c +++ b/net/core/sysctl_net_core.c @@ -643,11 +643,6 @@ static __net_init int sysctl_core_net_init(struct net *net) for (tmp = tbl; tmp->procname; tmp++) tmp->data += (char *)net - (char *)&init_net; - - /* Don't export any sysctls to unprivileged users */ - if (net->user_ns != &init_user_ns) { - tbl[0].procname = NULL; - } } net->core.sysctl_hdr = register_net_sysctl(net, "net/core", tbl); -- 2.39.0.314.g84b9a713c41-goog
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