Re: [PATCH net] tcp: avoid setting cwnd to invalid ssthresh after cwnd reduction states

From: Yuchung Cheng <redacted>
Date: Wed, 2 Aug 2017 10:58:54 -0700

On Wed, Aug 2, 2017 at 10:51 AM, David Miller [off-list ref] wrote:

quoted

From: Yuchung Cheng <redacted>
Date: Tue,  1 Aug 2017 13:22:32 -0700

quoted

If the sender switches the congestion control during ECN-triggered
cwnd-reduction state (CA_CWR), upon exiting recovery cwnd is set to
the ssthresh value calculated by the previous congestion control. If
the previous congestion control is BBR that always keep ssthresh
to TCP_INIFINITE_SSTHRESH, cwnd ends up being infinite. The safe
step is to avoid assigning invalid ssthresh value when recovery ends.

Signed-off-by: Yuchung Cheng <redacted>
Signed-off-by: Neal Cardwell <ncardwell@google.com>

Applied, thanks.

Is this a -stable candidate?

Yes it is. Thanks!

Great, queued up.