Re: [PATCH] tcp: don't apply tsoffset if rcv_tsecr is zero

[David Miller]

From: Andrey Vagin <avagin@xxxxxxxxxx>
Date: Tue, 27 Aug 2013 12:21:55 +0400

> From: Andrew Vagin <avagin@xxxxxxxxxx>
> 
> The zero value means that tsecr is not valid, so it's a special case.
> 
> tsoffset is used to customize tcp_time_stamp for one socket.
> tsoffset is usually zero, it's used when a socket was moved from one
> host to another host.
> 
> Currently this issue affects logic of tcp_rcv_rtt_measure_ts. Due to
> incorrect value of rcv_tsecr, tcp_rcv_rtt_measure_ts sets rto to
> TCP_RTO_MAX.
> 
> Reported-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
> Signed-off-by: Andrey Vagin <avagin@xxxxxxxxxx>

Applied and queued up for -stable.
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