From: Eric Dumazet <eric.dumazet@gmail.com>
To: Christoph Paasch <christoph.paasch@gmail.com>,
Eric Dumazet <eric.dumazet@gmail.com>
Cc: "Prout, Andrew - LLSC - MITLL" <aprout@ll.mit.edu>,
David Miller <davem@davemloft.net>,
netdev <netdev@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jonathan Looney <jtl@netflix.com>,
Neal Cardwell <ncardwell@google.com>,
Tyler Hicks <tyhicks@canonical.com>,
Yuchung Cheng <ycheng@google.com>,
Bruce Curtis <brucec@netflix.com>,
Jonathan Lemon <jonathan.lemon@gmail.com>,
Dustin Marquess <dmarquess@apple.com>
Subject: Re: [PATCH net 2/4] tcp: tcp_fragment() should apply sane memory limits
Date: Thu, 11 Jul 2019 12:18:46 +0200 [thread overview]
Message-ID: <b83b7aa4-9b0d-f9ad-6148-03e9828392c8@gmail.com> (raw)
In-Reply-To: <B600B3AB-559E-44C1-869C-7309DB28850E@gmail.com>
On 7/11/19 9:28 AM, Christoph Paasch wrote:
>
> Would it make sense to always allow the alloc in tcp_fragment when coming from __tcp_retransmit_skb() through the retransmit-timer ?
>
> AFAICS, the crasher was when an attacker sends "fake" SACK-blocks. Thus, we would still be protected from too much fragmentation, but at least would always allow the retransmission to go out.
>
>
I guess this could be done and hopefully something that can be backported without too much pain,
but I am sure some people will complain because reverting to timeouts might still
show regressions :/
next prev parent reply other threads:[~2019-07-11 10:18 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-17 17:03 [PATCH net 0/4] tcp: make sack processing more robust Eric Dumazet
2019-06-17 17:03 ` [PATCH net 1/4] tcp: limit payload size of sacked skbs Eric Dumazet
2019-06-17 17:14 ` Jonathan Lemon
2019-06-17 17:03 ` [PATCH net 2/4] tcp: tcp_fragment() should apply sane memory limits Eric Dumazet
2019-06-17 17:14 ` Jonathan Lemon
2019-06-18 0:18 ` Christoph Paasch
2019-06-18 2:28 ` Eric Dumazet
2019-06-18 3:19 ` Christoph Paasch
2019-06-18 3:44 ` Eric Dumazet
2019-06-18 3:53 ` Christoph Paasch
2019-06-18 4:08 ` Eric Dumazet
2019-07-10 18:23 ` Prout, Andrew - LLSC - MITLL
2019-07-10 18:28 ` Eric Dumazet
2019-07-10 18:53 ` Prout, Andrew - LLSC - MITLL
2019-07-10 19:26 ` Eric Dumazet
2019-07-11 7:28 ` Christoph Paasch
2019-07-11 9:19 ` Eric Dumazet
2019-07-11 18:26 ` Michal Kubecek
2019-07-11 18:50 ` Eric Dumazet
2019-07-11 10:18 ` Eric Dumazet [this message]
2019-07-11 17:14 ` Prout, Andrew - LLSC - MITLL
2019-07-11 18:28 ` Eric Dumazet
2019-07-11 19:04 ` Jonathan Lemon
2019-07-12 7:05 ` Eric Dumazet
2019-07-16 15:13 ` Prout, Andrew - LLSC - MITLL
2019-06-17 17:03 ` [PATCH net 3/4] tcp: add tcp_min_snd_mss sysctl Eric Dumazet
2019-06-17 17:15 ` Jonathan Lemon
2019-06-17 17:18 ` Tyler Hicks
2019-06-17 17:03 ` [PATCH net 4/4] tcp: enforce tcp_min_snd_mss in tcp_mtu_probing() Eric Dumazet
2019-06-17 17:16 ` Jonathan Lemon
2019-06-17 17:18 ` Tyler Hicks
2019-06-17 17:41 ` [PATCH net 0/4] tcp: make sack processing more robust David Miller
-- strict thread matches above, loose matches on Subject: below --
2019-08-02 19:02 [PATCH net 2/4] tcp: tcp_fragment() should apply sane memory limits Bernd
2019-08-02 19:14 ` Neal Cardwell
2019-08-02 19:58 ` Bernd
2019-08-14 14:41 ` Marcelo Ricardo Leitner
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