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charset="utf-8" If ssn is at the right edge of DSS mapping (ssn =3D=3D subflow->map_subflow= _seq + subflow->map_data_len), it shouldn't be handled as a bad map. This happens in the redundant subflows test cases. Signed-off-by: Geliang Tang --- net/mptcp/subflow.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 63e8892ec807..69a2c3e6fd76 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -878,8 +878,8 @@ static bool validate_mapping(struct sock *ssk, struct s= k_buff *skb) dbg_bad_map(subflow, ssn); return false; } - if (unlikely(!before(ssn, subflow->map_subflow_seq + - subflow->map_data_len))) { + if (unlikely(after(ssn, subflow->map_subflow_seq + + subflow->map_data_len))) { /* Mapping does covers past subflow data, invalid */ dbg_bad_map(subflow, ssn); return false; --=20 2.35.3