netdev - Re: Possible bug in TCP retry logic/Kernel crash

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Date:   Sun, 10 Nov 2019 18:20:15 -0800
From:   Avinash Patil <avinashapatil@...il.com>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: Possible bug in TCP retry logic/Kernel crash

Thanks for the response, Eric.

I have tested 4.19.80 as well and I see same issue there.  I can run
more tests(for additional data/logs) if needed- let me know.

Best,
Avinash

On Sun, Nov 10, 2019 at 3:48 PM Eric Dumazet <eric.dumazet@...il.com> wrote:
>
>
>
> On 11/9/19 9:59 PM, Avinash Patil wrote:
> > Hi everyone,
> >
> > Kernel: Linux 4.19.35 kernel built from linux-stable
> >
>
> This is quite an old version.
>
> Please upgrade to the latest one.
>
> $ git log --oneline v4.19.35..v4.19.82 -- net/ipv4/tcp*c
> 3fdcf6a88ded2bb5c3c0f0aabaff253dd3564013 tcp: better handle TCP_USER_TIMEOUT in SYN_SENT state
> 67fe3b94a833779caf4504ececa7097fba9b2627 tcp: fix tcp_ecn_withdraw_cwr() to clear TCP_ECN_QUEUE_CWR
> 5977bc19ce7f1ed25bf20d09d8e93e56873a9abb tcp: remove empty skb from write queue in error cases
> 6f3126379879bb2b9148174f0a4b6b65e04dede9 tcp: inherit timestamp on mtu probe
> 1b200acde418f4d6d87279d3f6f976ebf188f272 tcp: Reset bytes_acked and bytes_received when disconnecting
> c60f57dfe995172c2f01e59266e3ffa3419c6cd9 tcp: fix tcp_set_congestion_control() use from bpf hook
> 6323c238bb4374d1477348cfbd5854f2bebe9a21 tcp: be more careful in tcp_fragment()
> dad3a9314ac95dedc007bc7dacacb396ea10e376 tcp: refine memory limit test in tcp_fragment()
> 59222807fcc99951dc769cd50e132e319d73d699 tcp: enforce tcp_min_snd_mss in tcp_mtu_probing()
> 7f9f8a37e563c67b24ccd57da1d541a95538e8d9 tcp: add tcp_min_snd_mss sysctl
> ec83921899a571ad70d582934ee9e3e07f478848 tcp: tcp_fragment() should apply sane memory limits
> c09be31461ed140976c60a87364415454a2c3d42 tcp: limit payload size of sacked skbs
> 6728c6174a47b8a04ceec89aca9e1195dee7ff6b tcp: tcp_grow_window() needs to respect tcp_space()
>