From: Eric Dumazet <edumazet@google.com>
Date: Tue, 27 Mar 2018 19:49:42 -0700
Subject: ipv6: export ip6 fragments sysctl to unprivileged users
Patch-mainline: v4.17-rc1
Git-commit: 18dcbe12fe9fca0ab825f7eff993060525ac2503
References: CVE-2018-5391 bsc#1103097

IPv4 was changed in commit 52a773d645e9 ("net: Export ip fragment
sysctl to unprivileged users")

The only sysctl that is not per-netns is not used :
ip6frag_secret_interval

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Michal Kubecek <mkubecek@suse.cz>

---
 net/ipv6/reassembly.c | 4 ----
 1 file changed, 4 deletions(-)

--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -655,10 +655,6 @@ static int __net_init ip6_frags_ns_sysctl_register(struct net *net)
 		table[1].data = &net->ipv6.frags.low_thresh;
 		table[1].extra2 = &net->ipv6.frags.high_thresh;
 		table[2].data = &net->ipv6.frags.timeout;
-
-		/* Don't export sysctls to unprivileged users */
-		if (net->user_ns != &init_user_ns)
-			table[0].procname = NULL;
 	}
 
 	hdr = register_net_sysctl(net, "net/ipv6", table);