Re: [tor-bugs] #26360 [Core Tor/Tor]: Transport plugins deadlock if they write too much to stderr

[Tor Bug Tracker & Wiki]

#26360: Transport plugins deadlock if they write too much to stderr
---+--
 Reporter:  dcf|  Owner:  (none)
 Type:  defect | Status:  closed
 Priority:  Medium |  Milestone:  Tor: unspecified
Component:  Core Tor/Tor   |Version:
 Severity:  Normal | Resolution:  fixed
 Keywords:  pt, sponsor19  |  Actual Points:
Parent ID:  #28179 | Points:
 Reviewer: |Sponsor:  Sponsor8
---+--
Changes (by ahf):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 Should be fixed with the recent landing of the patches for #28179.

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Re: [tor-bugs] #26360 [Core Tor/Tor]: Transport plugins deadlock if they write too much to stderr

[Tor Bug Tracker & Wiki]

#26360: Transport plugins deadlock if they write too much to stderr
---+--
 Reporter:  dcf|  Owner:  (none)
 Type:  defect | Status:  new
 Priority:  Medium |  Milestone:  Tor: unspecified
Component:  Core Tor/Tor   |Version:
 Severity:  Normal | Resolution:
 Keywords:  pt, sponsor19  |  Actual Points:
Parent ID:  #28179 | Points:
 Reviewer: |Sponsor:  Sponsor8
---+--
Changes (by ahf):

 * sponsor:   => Sponsor8
 * parent:   => #28179


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Re: [tor-bugs] #26360 [Core Tor/Tor]: Transport plugins deadlock if they write too much to stderr

[Tor Bug Tracker & Wiki]

#26360: Transport plugins deadlock if they write too much to stderr
---+--
 Reporter:  dcf|  Owner:  (none)
 Type:  defect | Status:  new
 Priority:  Medium |  Milestone:  Tor: unspecified
Component:  Core Tor/Tor   |Version:
 Severity:  Normal | Resolution:
 Keywords:  pt, sponsor19  |  Actual Points:
Parent ID: | Points:
 Reviewer: |Sponsor:
---+--

Comment (by dcf):

 I posted a reproduction recipe for this bug at comment:16:ticket:28179.

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Re: [tor-bugs] #26360 [Core Tor/Tor]: Transport plugins deadlock if they write too much to stderr

[Tor Bug Tracker & Wiki]

#26360: Transport plugins deadlock if they write too much to stderr
---+--
 Reporter:  dcf|  Owner:  (none)
 Type:  defect | Status:  new
 Priority:  Medium |  Milestone:  Tor: unspecified
Component:  Core Tor/Tor   |Version:
 Severity:  Normal | Resolution:
 Keywords:  pt, sponsor19  |  Actual Points:
Parent ID: | Points:
 Reviewer: |Sponsor:
---+--
Changes (by arma):

 * keywords:  pt => pt, sponsor19


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[tor-bugs] #26360 [Core Tor/Tor]: Transport plugins deadlock if they write too much to stderr

[Tor Bug Tracker & Wiki]

#26360: Transport plugins deadlock if they write too much to stderr
--+
 Reporter:  dcf   |  Owner:  (none)
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Core Tor/Tor  |Version:
 Severity:  Normal|   Keywords:  pt
Actual Points:|  Parent ID:
   Points:|   Reviewer:
  Sponsor:|
--+
 
[https://gitweb.torproject.org/tor.git/tree/src/or/transports.c?id=bc951e83aac770d123118bf485d14490c2539048#n516
 launch_managed_proxy], via
 
[https://gitweb.torproject.org/tor.git/tree/src/common/util.c?id=bc951e83aac770d123118bf485d14490c2539048#n4232
 tor_spawn_background], opens a pipe from the child process's stderr, but
 never reads from the pipe. If the child process writes too much to its
 stderr, eventually an OS buffer fills up and the child process hangs. This
 manifests in the tor log as "No running bridges."

 Seems like this has always been a problem, but it only showed up recently
 with Snowflake, which by default logs to stderr and is more chatty than
 past transports have been. See #25600. The problem went away when
 instructing snowflake-client to log to a file instead of to stderr.

 Ccing ahf as suggested by arma.

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