From: Geliang Tang <tanggeliang@kylinos.cn>

Address Martin's comments in v1:

- bpf_iter_mptcp_subflow_new returns -EINVAL when msk socket lock isn't
  held.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
---
 net/mptcp/bpf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/mptcp/bpf.c b/net/mptcp/bpf.c
index 02038db59956..5aaeaf641f7f 100644
--- a/net/mptcp/bpf.c
+++ b/net/mptcp/bpf.c
@@ -252,7 +252,8 @@ bpf_iter_mptcp_subflow_new(struct bpf_iter_mptcp_subflow *it,
 	if (!msk)
 		return -EINVAL;
 
-	msk_owned_by_me(msk);
+	if (!lockdep_sock_is_held((const struct sock *)msk))
+		return -EINVAL;
 
 	kit->pos = &msk->conn_list;
 	return 0;
-- 
2.45.2