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-rw-r--r--net/mptcp/subflow.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 75c824b67ca9..9567231a4bfa 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -62,7 +62,9 @@ static void subflow_generate_hmac(u64 key1, u64 key2, u32 nonce1, u32 nonce2,
static bool mptcp_can_accept_new_subflow(const struct mptcp_sock *msk)
{
return mptcp_is_fully_established((void *)msk) &&
- READ_ONCE(msk->pm.accept_subflow);
+ ((mptcp_pm_is_userspace(msk) &&
+ mptcp_userspace_pm_active(msk)) ||
+ READ_ONCE(msk->pm.accept_subflow));
}
/* validate received token and create truncated hmac and nonce for SYN-ACK */