1 files changed, 3 insertions, 0 deletions

diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 01998860afaa..eb114ee419b6 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -656,6 +656,7 @@ static int sock_hash_update_common(struct bpf_map *map, void *key,
                                    struct sock *sk, u64 flags)
 {
         struct bpf_htab *htab = container_of(map, struct bpf_htab, map);
+        struct inet_connection_sock *icsk = inet_csk(sk);
         u32 key_size = map->key_size, hash;
         struct bpf_htab_elem *elem, *elem_new;
         struct bpf_htab_bucket *bucket;
@@ -666,6 +667,8 @@ static int sock_hash_update_common(struct bpf_map *map, void *key,
         WARN_ON_ONCE(!rcu_read_lock_held());
         if (unlikely(flags > BPF_EXIST))
                 return -EINVAL;
+        if (unlikely(icsk->icsk_ulp_data))
+                return -EINVAL;
 
         link = sk_psock_init_link();
         if (!link)