[tor-bugs] #21312 [Obfuscation/Snowflake]: snowflake-client is pegged at 100% cpu

Thu Mar 15 05:23:01 UTC 2018

#21312: snowflake-client is pegged at 100% cpu
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 Reporter:  arlolra                |          Owner:  arlolra
     Type:  defect                 |         Status:  needs_review
 Priority:  High                   |      Milestone:
Component:  Obfuscation/Snowflake  |        Version:
 Severity:  Major                  |     Resolution:
 Keywords:                         |  Actual Points:
Parent ID:                         |         Points:
 Reviewer:                         |        Sponsor:
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Comment (by arlolra):

 > With this patch I got another quick crash on my desktop. Also just after
 the first OnClose, this time a segmentation fault in CGO_Close.

 So now what's happening is that `pc.Destroy()` is being called multiple
 times (3) in the proxy, when the datachannel closes, two of which I
 understand.  I put some guards around that and now my proxy seems to be
 happily serving connections w/o crash.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21312#comment:48>
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