tree 88daa792c9080e57f9834d973dcbb6b253d27bcd
parent 8547ea5f52dd8ef19b69c25c41b1415481b3503b
author Jianguo Wu <wujianguo@chinatelecom.cn> 1625876449 -0700
committer David S. Miller <davem@davemloft.net> 1625881133 -0700

mptcp: avoid processing packet if a subflow reset

If check_fully_established() causes a subflow reset, it should not
continue to process the packet in tcp_data_queue().
Add a return value to mptcp_incoming_options(), and return false if a
subflow has been reset, else return true. Then drop the packet in
tcp_data_queue()/tcp_rcv_state_process() if mptcp_incoming_options()
return false.

Fixes: d582484726c4 ("mptcp: fix fallback for MP_JOIN subflows")
Signed-off-by: Jianguo Wu <wujianguo@chinatelecom.cn>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>