mptcp: avoid processing packet if a subflow reset

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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: d582484726 ("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>

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Jianguo Wu 2021-07-09 17:20:49 -07:00 • committed by David S. Miller

parent 8547ea5f52

commit 6787b7e350

3 changed files with 31 additions and 12 deletions

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5

include/net/mptcp.h

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19

net/ipv4/tcp_input.c

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19

net/mptcp/options.c

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