2 files changed, 11 insertions, 0 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 8d70cfbacb78..828ea211ff21 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -55,6 +55,13 @@ int inet_csk_bind_conflict(const struct sock *sk,
         struct hlist_node *node;
         int reuse = sk->sk_reuse;
 
+        /*
+         * Unlike other sk lookup places we do not check
+         * for sk_net here, since _all_ the socks listed
+         * in tb->owners list belong to the same net - the
+         * one this bucket belongs to.
+         */
+
         sk_for_each_bound(sk2, node, &tb->owners) {
                 if (sk != sk2 &&
                     !inet_v6_ipv6only(sk2) &&
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index 78de42ada844..87801cc1b2f8 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -33,6 +33,10 @@ int inet6_csk_bind_conflict(const struct sock *sk,
         const struct hlist_node *node;
 
         /* We must walk the whole port owner list in this case. -DaveM */
+        /*
+         * See comment in inet_csk_bind_conflict about sock lookup
+         * vs net namespaces issues.
+         */
         sk_for_each_bound(sk2, node, &tb->owners) {
                 if (sk != sk2 &&
                     (!sk->sk_bound_dev_if ||