From: Eric Dumazet edumazet@google.com
[ Upstream commit ee50e67ba0e17b1a1a8d76691d02eadf9e0f392c ]
To compute the rtx timeout schedule_3rdack_retransmission() does multiple things in the wrong way: srtt_us is measured in usec/8 and the timeout itself is an absolute value.
Fixes: ec3edaa7ca6ce02f ("mptcp: Add handling of outgoing MP_JOIN requests") Acked-by: Paolo Abeni pabeni@redhat.com Reviewed-by: Mat Martineau <mathew.j.martineau>@linux.intel.com> Signed-off-by: Eric Dumazet edumazet@google.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/mptcp/options.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index ac0233c9cd349..64afe71e2129a 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -368,9 +368,10 @@ static void schedule_3rdack_retransmission(struct sock *sk)
/* reschedule with a timeout above RTT, as we must look only for drop */ if (tp->srtt_us) - timeout = tp->srtt_us << 1; + timeout = usecs_to_jiffies(tp->srtt_us >> (3 - 1)); else timeout = TCP_TIMEOUT_INIT; + timeout += jiffies;
WARN_ON_ONCE(icsk->icsk_ack.pending & ICSK_ACK_TIMER); icsk->icsk_ack.pending |= ICSK_ACK_SCHED | ICSK_ACK_TIMER;