netdev - [PATCH stable 4.4 0/9] fix SegmentSmack (CVE-2018-5390)

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Date:   Wed, 15 Aug 2018 21:20:59 +0800
From:   Mao Wenan <maowenan@...wei.com>
To:     <dwmw2@...radead.org>, <gregkh@...ux-foundation.org>,
        <netdev@...r.kernel.org>, <eric.dumazet@...il.com>,
        <edumazet@...gle.com>, <davem@...emloft.net>, <ycheng@...gle.com>,
        <jdw@...zon.de>
Subject: [PATCH stable 4.4 0/9] fix SegmentSmack (CVE-2018-5390)

There are five patches to fix CVE-2018-5390 in latest mainline 
branch, but only two patches exist in stable 4.4 and 3.18: 
dc6ae4d tcp: detect malicious patterns in tcp_collapse_ofo_queue()
5fbec48 tcp: avoid collapses in tcp_prune_queue() if possible
but I have tested with these patches, and found the cpu usage was very high.
test results:
with fix patch： 78.2%   ksoftirqd
no fix patch：   90%     ksoftirqd

After analysing the codes of stable 4.4, and debuging the 
system, the search of ofo_queue(tcp ofo using a simple queue) cost more cycles.
So I think only two patches can't fix the CVE-2018-5390.
So I try to backport "tcp: use an RB tree for ooo receive queue" using RB tree 
instead of simple queue, then backport Eric Dumazet 5 fixed patches in mainline,
good news is that ksoftirqd is turn to about 20%, which is the same with mainline now.

Eric Dumazet (6):
  tcp: increment sk_drops for dropped rx packets
  tcp: free batches of packets in tcp_prune_ofo_queue()
  tcp: avoid collapses in tcp_prune_queue() if possible
  tcp: detect malicious patterns in tcp_collapse_ofo_queue()
  tcp: call tcp_drop() from tcp_data_queue_ofo()
  tcp: add tcp_ooo_try_coalesce() helper

Mao Wenan (2):
  Revert "tcp: detect malicious patterns in tcp_collapse_ofo_queue()"
  Revert "tcp: avoid collapses in tcp_prune_queue() if possible"

Yaogong Wang (1):
  tcp: use an RB tree for ooo receive queue

 include/linux/skbuff.h   |   8 +
 include/linux/tcp.h      |   7 +-
 include/net/sock.h       |   7 +
 include/net/tcp.h        |   2 +-
 net/core/skbuff.c        |  19 +++
 net/ipv4/tcp.c           |   4 +-
 net/ipv4/tcp_input.c     | 412 +++++++++++++++++++++++++++++------------------
 net/ipv4/tcp_ipv4.c      |   3 +-
 net/ipv4/tcp_minisocks.c |   1 -
 net/ipv6/tcp_ipv6.c      |   1 +
 10 files changed, 294 insertions(+), 170 deletions(-)

-- 
1.8.3.1