[tor-bugs] #29607 [Core Tor/Tor]: Denial of service on v2 and v3 onion service

[Tor Bug Tracker & Wiki]

#29607: Denial of service on v2 and v3 onion service
--------------------------+--------------------------
 Reporter:  pidgin        |          Owner:  pidgin
     Type:  defect        |         Status:  accepted
 Priority:  Immediate     |      Milestone:
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
--------------------------+--------------------------

Comment (by pidgin):

 the v3 onion tor process was at 100% cpu at another machine

 last notice log messages:


 scrubbed:39:57.000 [notice] Extremely large value for circuit build
 timeout: 128s. Assuming clock jump. Purpose 14 (Measuring circuit timeout)
 scrubbed:39:57.000 [notice] Extremely large value for circuit build
 timeout: 128s. Assuming clock jump. Purpose 14 (Measuring circuit timeout)
 scrubbed:39:57.000 [notice] Extremely large value for circuit build
 timeout: 128s. Assuming clock jump. Purpose 14 (Measuring circuit timeout)
 scrubbed:39:57.000 [notice] Extremely large value for circuit build
 timeout: 128s. Assuming clock jump. Purpose 14 (Measuring circuit timeout)
 scrubbed:39:57.000 [notice] Extremely large value for circuit build
 timeout: 128s. Assuming clock jump. Purpose 14 (Measuring circuit timeout)
 scrubbed:39:57.000 [notice] Extremely large value for circuit build
 timeout: 128s. Assuming clock jump. Purpose 14 (Measuring circuit timeout)
 scrubbed:57:39.000 [warn] Unknown introduction point auth key on circuit
 4162469458 for service [scrubbed]
 scrubbed:57:39.000 [warn] circuit_mark_for_close_(): Bug: Duplicate call
 to circuit_mark_for_close at src/feature/hs/hs_service.c:3227 (first at
 src/feature/hs/hs_service.c:2446) (on Tor 0.4.0.1-alpha 81f1b89efc94723f)


 with the logmessage "57:39.000 [warn] circuit_mark_for_close_():"
 the cpu is now at 0% and the service is not accessible

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29607#comment:32>
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