ruby_xfree segmentation fault

Thanks for reporting this issue.

I was able to reproduce this in a fresh jammy installation in a VM.

Reproducer (as proposed in https://github.com/ruby/ruby/pull/7663):

# apt update && apt install -y ruby ruby-nokogiri

# cat > reproducer.rb <<EOF
require 'nokogiri'

# must have an error in it to cause pthread_setspecific to be called
html = "<div foo='asdf>asdf</div>"

Thread.new { Nokogiri::HTML4::Document.parse(html) }
sleep 3 # THREAD_CACHE_TIME

exit 0
EOF

# while true; do ruby reproducer.rb; done

After a while (this may take several minutes to manifest) I got the reported error:

[BUG] Segmentation fault at 0x0000000000000440[BUG] Segmentation fault at 0x0000000000000440
ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux-gnu]

-- Machine register context ------------------------------------------------
 RIP: 0x00007c8ec2ac2fcb RBP: 0x000059ae2e596d20 RSP: 0x00007c8ebc5fed70
 RAX: 0x0000000000000000 RBX: 0x00007c8ebc5ff640 RCX: 0x0000000000000006
 RDX: 0x0000000000000002[BUG] [BUG] Segmentation fault at 0x0000000000000440
ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux-gnu]

-- Machine register context ------------------------------------------------
 RIP: 0x000075c4b4ec2fcb RBP: 0x000062693580e190 RSP: 0x000075c4ae9fed70
 RAX: 0x0000000000000000 RBX: 0x000075c4ae9ff640 RCX: 0x0000000000000006
 RDX: 0x0000000000000002 RDI: 0x000062693580e190 RSI: 0x0000000000000000
  R8: 0x000075c4ae9fede4 R9: 0x00000000000000ca R10: 0x0000000000000000
 R11: 0x0000000000000246 R12: 0x000075c4b5170b40
 R13: 0x000075c4ae9fedc0

Lunar is EOL, so marking its task as Won't Fix.

This is fixed in ruby3.2/3.2.3-1build2 in Noble.

Hello Toni, or anyone else affected,

Accepted ruby3.1 into mantic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ruby3.1/3.1.2-7ubuntu3.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-mantic to verification-done-mantic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-mantic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Hello Toni, or anyone else affected,

Accepted ruby3.0 into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ruby3.0/3.0.2-7ubuntu2.5 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

All autopkgtests for the newly accepted ruby3.1 (3.1.2-7ubuntu3.1) for mantic have finished running.
The following regressions have been reported in tests triggered by the package:

passenger/6.0.17+ds-1build1 (arm64)
ruby-defaults/1:3.1 (i386)
ruby-rblineprof/0.3.7-2build5 (s390x)
ruby3.1/3.1.2-7ubuntu3.1 (i386)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/mantic/update_excuses.html#ruby3.1

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

All autopkgtests for the newly accepted ruby3.0 (3.0.2-7ubuntu2.5) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

passenger/6.0.10-3build2 (amd64)
puma/5.5.2-2ubuntu2 (ppc64el)
ruby-commonmarker/0.23.2-2 (ppc64el)
ruby-kyotocabinet/1.34-0.1build1 (armhf)
ruby-prof/1.3.1-2build2 (arm64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/jammy/update_excuses.html#ruby3.0

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

# Verification Mantic

root@ruby31-segfault-fix:~# dpkg -l ruby3.1
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-================-============-======================================================
ii ruby3.1 3.1.2-7ubuntu3.1 amd64 Interpreter of object-oriented scripting language Ruby
root@ruby31-segfault-fix:~# cat reproducer.rb
require 'nokogiri'

# must have an error in it to cause pthread_setspecific to be called
html = "<div foo='asdf>asdf</div>"

Thread.new { Nokogiri::HTML4::Document.parse(html) }
sleep 3 # THREAD_CACHE_TIME

exit 0
root@ruby31-segfault-fix:~# time while true; do ruby reproducer.rb; done
^Creproducer.rb:7:in `sleep': Interrupt
 from reproducer.rb:7:in `<main>'

real 8m5.499s
user 0m10.297s
sys 0m4.874s

More than 8 minutes running the script without any segfault.

# Verification Jammy

root@ruby30-segfault-fix:~# dpkg -l ruby3.0
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-================-============-======================================================
ii ruby3.0 3.0.2-7ubuntu2.5 amd64 Interpreter of object-oriented scripting language Ruby
root@ruby30-segfault-fix:~# cat reproducer.rb
require 'nokogiri'

# must have an error in it to cause pthread_setspecific to be called
html = "<div foo='asdf>asdf</div>"

Thread.new { Nokogiri::HTML4::Document.parse(html) }
sleep 3 # THREAD_CACHE_TIME

exit 0
root@ruby30-segfault-fix:~# time while true; do ruby reproducer.rb; done
^Creproducer.rb:7:in `sleep': Interrupt
 from reproducer.rb:7:in `<main>'

real 8m4.811s
user 0m10.094s
sys 0m4.370s

More than 8 minutes running the script without any segfault.

FWIW there is no autopkgtest regression now.

This bug was fixed in the package ruby3.1 - 3.1.2-7ubuntu3.1

---------------
ruby3.1 (3.1.2-7ubuntu3.1) mantic; urgency=medium

  * d/p/fix-ruby_xfree-segfault.patch: fix occasional segfault (LP: #2049197).
  * Replace expired certificate in tests with upstream patch (LP: #2051380).
    - d/p/renew-test-certificates-d3933fc753187a055a4904af82f5f3794c88c416.patch

 -- Lucas Kanashiro <email address hidden> Wed, 20 Mar 2024 17:39:43 -0300

The verification of the Stable Release Update for ruby3.1 has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

This bug was fixed in the package ruby3.0 - 3.0.2-7ubuntu2.5

---------------
ruby3.0 (3.0.2-7ubuntu2.5) jammy; urgency=medium

  * d/p/fix-ruby_xfree-segfault.patch: fix occasional segfault (LP: #2049197).
  * Replace expired certificate in tests with upstream patch (LP: #2051380).
    - d/p/renew-test-certificates-d3933fc753187a055a4904af82f5f3794c88c416.patch

 -- Lucas Kanashiro <email address hidden> Wed, 20 Mar 2024 17:50:02 -0300