[Bug 1054061] Segfault in Perl_gv_fetchpvn_flags when trying to initialize back_perl openldap backend

[bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1054061

Petr Pisar  changed:

   What|Removed |Added

 Status|NEW |CLOSED
 Resolution|--- |WONTFIX
Last Closed||2019-11-21 16:25:46



--- Comment #12 from Petr Pisar  ---
Red Hat does not plan to fix this issue in Red Hat Enterprise Linux 7. If this
issue is critical for you, please use appropriate channels for escalating it,
e.g. contact Red Hat support.

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[Bug 1054061] Segfault in Perl_gv_fetchpvn_flags when trying to initialize back_perl openldap backend

[bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1054061

Martin Kyral  changed:

   What|Removed |Added

 CC||mky...@redhat.com



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[Bug 1054061] Segfault in Perl_gv_fetchpvn_flags when trying to initialize back_perl openldap backend

[bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1054061

Joe Orton jor...@redhat.com changed:

   What|Removed |Added

 CC||jor...@redhat.com



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[Bug 1054061] Segfault in Perl_gv_fetchpvn_flags when trying to initialize back_perl openldap backend

[bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1054061



--- Comment #6 from Howard Chu h...@symas.com ---
(In reply to Petr Pisar from comment #5)
 I'm sorry but the reproducer involves a lot of openldap code. Please provide
 perl-only reproducer. Otherwise I must conclude the bug is in the openldap
 because we've never seen such a failure elsewhere (e.g. mod_perl is a
 dlopened DSO which embeds the perl interpreter).

Typically mod_perl doesn't run with thread support though, so not directly
comparable.

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[Bug 1054061] Segfault in Perl_gv_fetchpvn_flags when trying to initialize back_perl openldap backend

[bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1054061

Petr Pisar ppi...@redhat.com changed:

   What|Removed |Added

  Flags||needinfo?(jsynacek@redhat.c
   ||om)



--- Comment #5 from Petr Pisar ppi...@redhat.com ---
I'm sorry but the reproducer involves a lot of openldap code. Please provide
perl-only reproducer. Otherwise I must conclude the bug is in the openldap
because we've never seen such a failure elsewhere (e.g. mod_perl is a dlopened
DSO which embeds the perl interpreter).

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[Bug 1054061] Segfault in Perl_gv_fetchpvn_flags when trying to initialize back_perl openldap backend

[bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1054061



--- Comment #3 from Jan Synacek jsyna...@redhat.com ---
Created attachment 851575
  -- https://bugzilla.redhat.com/attachment.cgi?id=851575action=edit
reproducer

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[Bug 1054061] Segfault in Perl_gv_fetchpvn_flags when trying to initialize back_perl openldap backend

[bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1054061

Jan Synacek jsyna...@redhat.com changed:

   What|Removed |Added

  Flags|needinfo?(jsynacek@redhat.c |
   |om) |



--- Comment #2 from Jan Synacek jsyna...@redhat.com ---
The reproducer is still the same and you can even simplify it a bit. And yes,
it's still reproducible on F20 as well as RHEL7 (Beta 1).

Reproducer:
0) install RHEL-7-Beta-1 minimal installation
   yum install openldap-{servers,clients}
1) unpack reproducer pack
2) in one terminal window, run go.sh
3) in another terminal window, run try.sh
   the output will look like this:

  # ./try.sh 
  SASL/EXTERNAL authentication started
  SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
  SASL SSF: 0
  adding new entry cn=module,cn=config

  SASL/EXTERNAL authentication started
  SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
  SASL SSF: 0
  adding new entry olcDatabase=perl,cn=config
  ldap_result: Can't contact LDAP server (-1)

  the last line indicates that the server has been terminated

4) see the terminal window in which you have run the go.sh script and you will
see a segfault there
5) if you want to repeat the crash, reboot and go to 2)

I had to reboot the machine if I wanted to repeat the crash, because any
subsequent attempts to reproduce the issue were not successful (the try.sh
script finished without any errors).

If try.sh finishes without any errors, its output looks like so:
  # ./try.sh 
  SASL/EXTERNAL authentication started
  SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
  SASL SSF: 0
  adding new entry cn=module,cn=config

  SASL/EXTERNAL authentication started
  SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
  SASL SSF: 0
  adding new entry olcDatabase=perl,cn=config

  adding new entry dc=perl-example,dc=com

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[Bug 1054061] Segfault in Perl_gv_fetchpvn_flags when trying to initialize back_perl openldap backend

[bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1054061

Petr Pisar ppi...@redhat.com changed:

   What|Removed |Added

 Depends On|967719  |




Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=967719
[Bug 967719] Segfault in Perl_gv_fetchpvn_flags when trying to initialize
back_perl openldap backend
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[Bug 1054061] Segfault in Perl_gv_fetchpvn_flags when trying to initialize back_perl openldap backend

[bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1054061

Marcela Mašláňová mmasl...@redhat.com changed:

   What|Removed |Added

 CC||jsyna...@redhat.com
  Flags||needinfo?(jsynacek@redhat.c
   ||om)



--- Comment #1 from Marcela Mašláňová mmasl...@redhat.com ---
It's not reproducible on F20, so we can't fix it even on RHEL-7. If you can
provide to us better reproducer, we can try to fix it.

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