[Devel] [PATCH 1/2 RH7 v2] netlink: protect NETLINK_REPAIR2

[Andrey Zhadchenko]

Prevent using netlink repair mode from containers.

Signed-off-by: Andrey Zhadchenko <andrey.zhadchenko at virtuozzo.com>
---

v2: added ve_struct *ve to get rid of second get_exec_env call

 net/netlink/af_netlink.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 7b3de33..6c99bca 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1529,6 +1529,13 @@ static int netlink_setsockopt(struct socket *sock, int level, int optname,
 
 	switch (optname) {
 	case NETLINK_REPAIR2:
+#ifdef CONFIG_VE
+		{
+			struct ve_struct *ve = get_exec_env();
+			if (!ve_is_super(ve) && !ve->is_pseudosuper)
+				return -ENOPROTOOPT;
+		}
+#endif
 		if (val)
 			nlk->flags |= NETLINK_F_REPAIR;
 		else
-- 
1.8.3.1