[Bug 1897561] Re: libperl.so.5.30.0 causes nginx to segfault

[Simon Déziel]

** Description changed:

+ [Steps to reproduce]
+ 
+ 1) launch a focal container
+ $ lxc launch images:ubuntu/focal focal-1897561
+ 2) enter the container
+ $ lxc shell focal-1897561
+ 3) install libnginx-mod-http-perl
+ # apt-get install -y nginx-core libnginx-mod-http-perl
+ 4) check nginx journal
+ # journalctl -fu nginx &
+ 5) reload nginx 2-3 times
+ # systemctl reload nginx
+ 
+ Eventually you will see this from the journal:
+ 
+ Oct 13 17:13:34 focal-1897561 systemd[1]: Reloaded A high performance web server and a reverse proxy server.
+ Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Main process exited, code=dumped, status=11/SEGV
+ Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 588 (nginx) with signal SIGKILL.
+ Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 589 (nginx) with signal SIGKILL.
+ Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 588 (nginx) with signal SIGKILL.
+ Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 589 (nginx) with signal SIGKILL.
+ Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Failed with result 'core-dump'.
+ 
+ 
+ [Original bug description]
+ 
  Ubuntu 20.04 LTS
  
  Looks that Perl 5.30 has bug that causes nginx to die, usually occurs
  after "service nginx reload"
  
  This looks like nginx, but it really is perl issue:
  https://github.com/Perl/perl5/issues/17154
  
  Fix done in 5.32 (Perl5 commit ffffbf0) and people are asking backport
  to 5.30 to get fix also to nginx.
  
  Error:
  Sep 28 07:39:43 host kernel: [1340832.811014] nginx[3253005]: segfault at 10 ip 00007fbf3220d593 sp 00007ffd6bba6260 error 4 in libperl.so.5.30.0[7fbf321a5000+166000]
  
  Symptom: Nginx terminates

** Description changed:

  [Steps to reproduce]
  
  1) launch a focal container
  $ lxc launch images:ubuntu/focal focal-1897561
  2) enter the container
  $ lxc shell focal-1897561
  3) install libnginx-mod-http-perl
  # apt-get install -y nginx-core libnginx-mod-http-perl
  4) check nginx journal
  # journalctl -fu nginx &
  5) reload nginx 2-3 times
  # systemctl reload nginx
  
  Eventually you will see this from the journal:
  
  Oct 13 17:13:34 focal-1897561 systemd[1]: Reloaded A high performance web server and a reverse proxy server.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Main process exited, code=dumped, status=11/SEGV
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 588 (nginx) with signal SIGKILL.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 589 (nginx) with signal SIGKILL.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 588 (nginx) with signal SIGKILL.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 589 (nginx) with signal SIGKILL.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Failed with result 'core-dump'.
  
+ [Workaround]
+ 
+ If libnginx-mod-http-perl is not needed, purging it and restarting nginx
+ sidesteps the problem.
  
  [Original bug description]
  
  Ubuntu 20.04 LTS
  
  Looks that Perl 5.30 has bug that causes nginx to die, usually occurs
  after "service nginx reload"
  
  This looks like nginx, but it really is perl issue:
  https://github.com/Perl/perl5/issues/17154
  
  Fix done in 5.32 (Perl5 commit ffffbf0) and people are asking backport
  to 5.30 to get fix also to nginx.
  
  Error:
  Sep 28 07:39:43 host kernel: [1340832.811014] nginx[3253005]: segfault at 10 ip 00007fbf3220d593 sp 00007ffd6bba6260 error 4 in libperl.so.5.30.0[7fbf321a5000+166000]
  
  Symptom: Nginx terminates

-- 
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https://bugs.launchpad.net/bugs/1897561

Title:
  libperl.so.5.30.0 causes nginx to segfault

Status in perl package in Ubuntu:
  Incomplete

Bug description:
  [Steps to reproduce]

  1) launch a focal container
  $ lxc launch images:ubuntu/focal focal-1897561
  2) enter the container
  $ lxc shell focal-1897561
  3) install libnginx-mod-http-perl
  # apt-get install -y nginx-core libnginx-mod-http-perl
  4) check nginx journal
  # journalctl -fu nginx &
  5) reload nginx 2-3 times
  # systemctl reload nginx

  Eventually you will see this from the journal:

  Oct 13 17:13:34 focal-1897561 systemd[1]: Reloaded A high performance web server and a reverse proxy server.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Main process exited, code=dumped, status=11/SEGV
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 588 (nginx) with signal SIGKILL.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 589 (nginx) with signal SIGKILL.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 588 (nginx) with signal SIGKILL.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Killing process 589 (nginx) with signal SIGKILL.
  Oct 13 17:13:35 focal-1897561 systemd[1]: nginx.service: Failed with result 'core-dump'.

  [Workaround]

  If libnginx-mod-http-perl is not needed, purging it and restarting
  nginx sidesteps the problem.

  [Original bug description]

  Ubuntu 20.04 LTS

  Looks that Perl 5.30 has bug that causes nginx to die, usually occurs
  after "service nginx reload"

  This looks like nginx, but it really is perl issue:
  https://github.com/Perl/perl5/issues/17154

  Fix done in 5.32 (Perl5 commit ffffbf0) and people are asking backport
  to 5.30 to get fix also to nginx.

  Error:
  Sep 28 07:39:43 host kernel: [1340832.811014] nginx[3253005]: segfault at 10 ip 00007fbf3220d593 sp 00007ffd6bba6260 error 4 in libperl.so.5.30.0[7fbf321a5000+166000]

  Symptom: Nginx terminates

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