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Yuchung Cheng cd736d8b67 tcp: fix retrans timestamp on passive Fast Open 
Commit c7d13c8faa ("tcp: properly track retry time on
passive Fast Open") sets the start of SYNACK retransmission
time on passive Fast Open in "retrans_stamp". However the
timestamp is not reset upon the handshake has completed. As a
result, future data packet retransmission may not update it in
tcp_retransmit_skb(). This may lead to socket aborting earlier
unexpectedly by retransmits_timed_out() since retrans_stamp remains
the SYNACK rtx time.

This bug only manifests on passive TFO sender that a) suffered
SYNACK timeout and then b) stalls on very first loss recovery. Any
successful loss recovery would reset the timestamp to avoid this
issue.

Fixes: c7d13c8faa ("tcp: properly track retry time on passive Fast Open")
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-14 15:17:49 -07:00
arch Merge branch 'parisc-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2019-05-14 13:17:19 -07:00
block
certs
crypto
Documentation
drivers virtio: fixes, features 2019-05-14 14:12:59 -07:00
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include virtio: fixes, features 2019-05-14 14:12:59 -07:00
init
ipc
kernel kgdb patches for 5.2-rc1 2019-05-14 13:14:10 -07:00
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net tcp: fix retrans timestamp on passive Fast Open 2019-05-14 15:17:49 -07:00
samples Add gitignore file for samples/vfs/ generated files 2019-05-14 13:30:10 -07:00
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security
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tools virtio: fixes, features 2019-05-14 14:12:59 -07:00
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README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.