netdev - Re: Crash when receiving FIN-ACK in TCP_FIN

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Date:   Mon, 28 Oct 2019 19:36:36 -0600
From:   Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
To:     Neal Cardwell <ncardwell@...gle.com>
Cc:     Netdev <netdev@...r.kernel.org>, Yuchung Cheng <ycheng@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: Crash when receiving FIN-ACK in TCP_FIN_WAIT1 state

>> I've queued up a build which logs calls to tcp_write_queue_purge and
>> clears tp->highest_sack and tp->sacked_out. I will let you know how
>> it fares by end of week.
> 
> OK, thanks. That should be a useful data point.

I haven't seen the crash in the testing so far.
Looks like clearing these values seems to help.

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