Bug #5559: Intermittent Seg fault when using net-ssh

• Status: Third Party's Issue
• Assignee: nobu (Nobuyoshi Nakada)
• Target version: -
• ruby -v: $ ruby -v ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.2.0]

[kimptoc (Chris Kimpton)]

Hi,

This is probably a waste of a report - especially as my standalone 5 lines test of this generally works (it seg faulted once), but when run inside Rails3.1.1, via a background thread, if I use net-ssh, it crashes the VM.

$ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.2.0]

On OSX 10.7.2

/Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/buffer.rb:255: [BUG] Segmentation fault
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.2.0]

-- Control frame information -----------------------------------------------
c:0038 p:---- s:0162 b:0162 l:000161 d:000161 CFUNC :e=
c:0037 p:0198 s:0158 b:0158 l:000157 d:000157 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/buffer.rb:255
c:0036 p:0028 s:0153 b:0153 l:000152 d:000152 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/buffer.rb:239
c:0035 p:0218 s:0149 b:0148 l:000126 d:000147 BLOCK /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/known_hosts.rb:111
c:0034 p:---- s:0142 b:0142 l:000141 d:000141 FINISH
c:0033 p:---- s:0140 b:0140 l:000139 d:000139 CFUNC :each_line
c:0032 p:0031 s:0137 b:0137 l:000126 d:000136 BLOCK /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/known_hosts.rb:95
c:0031 p:---- s:0133 b:0133 l:000132 d:000132 FINISH
c:0030 p:---- s:0131 b:0131 l:000130 d:000130 CFUNC :open
c:0029 p:0075 s:0127 b:0127 l:000126 d:000126 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/known_hosts.rb:93
c:0028 p:0027 s:0121 b:0121 l:000112 d:000120 BLOCK /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/known_hosts.rb:23
c:0027 p:---- s:0118 b:0118 l:000117 d:000117 FINISH
c:0026 p:---- s:0116 b:0116 l:000115 d:000115 CFUNC :map
c:0025 p:0012 s:0113 b:0113 l:000112 d:000112 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/known_hosts.rb:23
c:0024 p:0026 s:0108 b:0108 l:000107 d:000107 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/known_hosts.rb:17
c:0023 p:0324 s:0103 b:0103 l:000102 d:000102 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/transport/algorithms.rb:213
c:0022 p:0070 s:0098 b:0098 l:000097 d:000097 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/transport/algorithms.rb:96
c:0021 p:---- s:0093 b:0093 l:000092 d:000092 FINISH
c:0020 p:---- s:0091 b:0091 l:000090 d:000090 CFUNC :new
c:0019 p:0248 s:0086 b:0086 l:001480 d:001480 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh/transport/session.rb:78
c:0018 p:---- s:0080 b:0080 l:000079 d:000079 FINISH
c:0017 p:---- s:0078 b:0078 l:000077 d:000077 CFUNC :new
c:0016 p:0458 s:0073 b:0073 l:000072 d:000072 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-ssh-2.2.1/lib/net/ssh.rb:186
c:0015 p:0029 s:0062 b:0062 l:000061 d:000061 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/net-sftp-2.0.5/lib/net/sftp.rb:31
c:0014 p:0077 s:0052 b:0052 l:002370 d:002370 METHOD /Users/kimptoc/dev/ruby/fran/viadropbox31/app/models/service_handler/sftp/sftp_service.rb:10
c:0013 p:0306 s:0046 b:0046 l:000045 d:000045 METHOD /Users/kimptoc/dev/ruby/fran/viadropbox31/app/models/worker/basic_deployer.rb:27
c:0012 p:0131 s:0036 b:0036 l:000035 d:000035 METHOD /Users/kimptoc/dev/ruby/fran/viadropbox31/app/models/worker/manage_deploy_queue.rb:52
c:0011 p:0085 s:0029 b:0029 l:000028 d:000028 METHOD /Users/kimptoc/dev/ruby/fran/viadropbox31/app/models/worker/manage_deploy_queue.rb:71
c:0010 p:0011 s:0025 b:0025 l:001198 d:000024 BLOCK /Users/kimptoc/dev/ruby/fran/viadropbox31/config/initializers/background_deployer.rb:10
c:0009 p:---- s:0023 b:0023 l:000022 d:000022 FINISH
c:0008 p:---- s:0021 b:0021 l:000020 d:000020 CFUNC :call
c:0007 p:0027 s:0017 b:0017 l:000016 d:000016 METHOD /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/rufus-scheduler-2.0.12/lib/rufus/sc/jobs.rb:184
c:0006 p:0065 s:0014 b:0014 l:0024c8 d:000013 BLOCK /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/rufus-scheduler-2.0.12/lib/rufus/sc/jobs.rb:149
c:0005 p:---- s:0011 b:0011 l:000010 d:000010 FINISH
c:0004 p:---- s:0009 b:0009 l:000008 d:000008 CFUNC :call
c:0003 p:0011 s:0006 b:0006 l:0005e0 d:000005 BLOCK /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/rufus-scheduler-2.0.12/lib/rufus/sc/scheduler.rb:369
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:---- s:0002 b:0002 l:000001 d:000001 TOP

-- Ruby level backtrace information ----------------------------------------
/Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/rufus-scheduler-2.0.12/lib/rufus/sc/scheduler.rb:369:in block in trigger_job' /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/rufus-scheduler-2.0.12/lib/rufus/sc/scheduler.rb:369:in call'
/Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/rufus-scheduler-2.0.12/lib/rufus/sc/jobs.rb:149:in block in trigger' /Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/rufus-scheduler-2.0.12/lib/rufus/sc/jobs.rb:184:in trigger_block'
/Users/kimptoc/.rvm/gems/ruby-1.9.3-p0@p-viadropbox31/gems/rufus-scheduler-2.0.12/lib/rufus/sc/jobs.rb:184:in call' /Users/kimptoc/dev/ruby/fran/viadropbox31/config/initializers/background_deployer.rb:10:in block in <top (required)>'
/Users/kimptoc/dev/ruby/fran/viadropbox31/app/models/worker/manage_deploy_queue.rb:71:in work' /Users/kimptoc/dev/ruby/fran/viadropbox31/app/models/worker/manage_deploy_queue.rb:52:in process_next'
/Users/kimptoc/dev/ruby/fran/viadropbox31/app/models/worker/basic_deployer.rb:27:in deploy' /Users/kimptoc/dev/ruby/fran/viadropbox31/app/models/service_handler/sftp/sftp_service.rb:10:in grab_from_source'

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Feedback

Please show the crash report log file under ~/Library/Logs/CrashReporter or /Library/Logs/CrashReporter.

[kimptoc (Chris Kimpton)]

• File ruby_2011-11-07-165210_Chris-Kimptons-MacBook-Air-2011.crash ruby_2011-11-07-165210_Chris-Kimptons-MacBook-Air-2011.crash added
• File rails_crash.txt rails_crash.txt added

I have created a minimal rails project that demonstrates the problem here:

https://github.com/kimptoc/samples-rails-net-ssh-crashing-193

Attached is the crash report log file

[daveungerer (Dave Ungerer)]

There's some chance that this is the same issue as:
http://bugs.ruby-lang.org/issues/4373

In which case it's not a Ruby issue, but a Macports issue. Follow these steps:
rvm remove 1.9.3
manually delete ~/.rvm/gems/ruby-1.9.3* (not sure how to make rvm do it automatically)
sudo port -fp uninstall --follow-dependents OpenSSL latest_version_here - note that this will delete everything that depends on OpenSSL, which is a lot (I'm now using homebrew for those things)

Now re-install ruby and your gems and it should work. I also added the following to my .bash_profile, not sure if it's needed:
export RUBYOPT="-ropenssl"

[alexeymuranov (Alexey Muranov)]

Dave Ungerer wrote:

There's some chance that this is the same issue as:
http://bugs.ruby-lang.org/issues/4373

In which case it's not a Ruby issue, but a Macports issue. Follow these steps:
rvm remove 1.9.3
manually delete ~/.rvm/gems/ruby-1.9.3* (not sure how to make rvm do it automatically)
sudo port -fp uninstall --follow-dependents OpenSSL latest_version_here - note that this will delete everything that depends on OpenSSL, which is a lot (I'm now using homebrew for those things)

Now re-install ruby and your gems and it should work. I also added the following to my .bash_profile, not sure if it's needed:
export RUBYOPT="-ropenssl"

I do not know if just reinstalling ruby will be enough. I had seg faults with ruby 1.9.3p0, and i could fix it by following
http://www.christopherirish.com/2011/09/02/ruby-1-9-2-segmentation-fault-and-openssl/

What i've understood is that it was not an issue with MacPorts, but with Mac OS ssl which is still below version 1.0.0.

[mame (Yusuke Endoh)]

• Status changed from Feedback to Assigned
• Assignee set to nobu (Nobuyoshi Nakada)

Looks os x issue. Nobu, could you check this?

--
Yusuke Endoh [e-mail]

[jeremyevans0 (Jeremy Evans)]

• Status changed from Assigned to Third Party's Issue