[tor-bugs] #30628 [Core Tor/Tor]: sendme closes client connections

Tor Bug Tracker & Wiki blackhole at torproject.org
Sun Jun 2 10:35:06 UTC 2019


#30628: sendme closes client connections
-------------------------------------------------+-------------------------
 Reporter:  traumschule                          |          Owner:  dgoulet
     Type:  defect                               |         Status:
                                                 |  assigned
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.4.1.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  sendme, tor-flowctrl, 041-must       |  Actual Points:
  041-regression regression                      |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by pege):

 I did some tests, the issue is easiest to reproduce by receiving bulk
 data. Since there is an SSH server behind the onion service I used for
 testing, I went with `ssh -vvv eve.arbitrary.onion 'cat /dev/urandom'
 >/dev/null`.

 Here is some of the SSH debug output for some of the test runs:


 {{{
 Transferred: sent 2532, received 478420 bytes, in 1.2 seconds
 Bytes per second: sent 2077.3, received 392499.2

 Transferred: sent 2472, received 150180 bytes, in 3.4 seconds
 Bytes per second: sent 718.6, received 43659.6

 Transferred: sent 2452, received 51708 bytes, in 1.1 seconds
 Bytes per second: sent 2239.1, received 47219.2

 Transferred: sent 2532, received 478420 bytes, in 1.7 seconds
 Bytes per second: sent 1453.2, received 274589.0

 Transferred: sent 2492, received 314300 bytes, in 0.9 seconds
 Bytes per second: sent 2871.7, received 362185.6

 Transferred: sent 2492, received 314300 bytes, in 2.5 seconds
 Bytes per second: sent 1011.3, received 127543.9

 Transferred: sent 2532, received 462008 bytes, in 1.6 seconds
 Bytes per second: sent 1551.6, received 283118.3
 }}}


 I did about 50 more runs, "received" never exceeded 512KiB. Could be a
 coincident though.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30628#comment:13>
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