From: Serge E. Hallyn <serge.hallyn@xxxxxxxxxxxxx>
netlink_capable should check for permissions against the user
namespace owning the socket in question.
Signed-off-by: Serge E. Hallyn <serge.hallyn@xxxxxxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
---
net/netlink/af_netlink.c | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 6ef64ad..81c1099 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -580,8 +580,15 @@ retry:
static inline int netlink_capable(struct socket *sock, unsigned int flag)
{
- return (nl_table[sock->sk->sk_protocol].nl_nonroot & flag) ||
- capable(CAP_NET_ADMIN);
+ struct net *net;
+ if (nl_table[sock->sk->sk_protocol].nl_nonroot & flag)
+ return 1;
+#ifdef CONFIG_NET_NS
+ net = sock->sk->sk_net;
+#else
+ net = &init_net;
+#endif
+ return ns_capable(net->user_ns, CAP_NET_ADMIN);
}
static void
--
1.7.4.1
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