userns: Teach inet_diag to work with user namespaces
Compute the user namespace of the socket that we are replying to
and translate the kuids of reported sockets into that user namespace.
Cc: Andrew Vagin <avagin@openvz.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
index 16d0960..d2f336e 100644
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -24,7 +24,9 @@
if (!inet_diag_bc_sk(bc, sk))
return 0;
- return inet_sk_diag_fill(sk, NULL, skb, req, NETLINK_CB(cb->skb).pid,
+ return inet_sk_diag_fill(sk, NULL, skb, req,
+ sk_user_ns(NETLINK_CB(cb->skb).ssk),
+ NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
}
@@ -69,6 +71,7 @@
goto out;
err = inet_sk_diag_fill(sk, NULL, rep, req,
+ sk_user_ns(NETLINK_CB(in_skb).ssk),
NETLINK_CB(in_skb).pid,
nlh->nlmsg_seq, 0, nlh);
if (err < 0) {