Paolo Abeni 9c29e36152 mptcp: fix DSS map generation on fin retransmission ... The RFC 8684 mandates that no-data DATA FIN packets should carry a DSS with 0 sequence number and data len equal to 1. Currently, on FIN retransmission we re-use the existing mapping; if the previous fin transmission was part of a partially acked data packet, we could end-up writing in the egress packet a non-compliant DSS. The above will be detected by a "Bad mapping" warning on the receiver side. This change addresses the issue explicitly checking for 0 len packet when adding the DATA_FIN option. Fixes: 6d0060f600 ("mptcp: Write MPTCP DSS headers to outgoing data packets") Reported-by: syzbot+42a07faa5923cfaeb9c9@syzkaller.appspotmail.com Tested-by: Christoph Paasch <cpaasch@apple.com> Reviewed-by: Christoph Paasch <cpaasch@apple.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2020-07-07 15:27:37 -07:00
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crypto.c
ctrl.c
diag.c
Kconfig
Makefile
mib.c
mib.h
options.c	mptcp: fix DSS map generation on fin retransmission	2020-07-07 15:27:37 -07:00
pm_netlink.c
pm.c
protocol.c	mptcp: fix races between shutdown and recvmsg	2020-06-10 13:34:14 -07:00
protocol.h	mptcp: cache msk on MP_JOIN init_req	2020-06-18 20:25:51 -07:00
subflow.c	mptcp: drop MP_JOIN request sock on syn cookies	2020-06-18 20:25:51 -07:00
token.c