vpopmail POP: "ERR aac, chiled crashed" after reboot, core dumped

From: Chris Shenton (chris_at_shenton.org)
Date: 09/15/03

  • Next message: Chris Shenton: "Re: vpopmail POP: "ERR aac, chiled crashed" after reboot, core dumped" 
    To: vchkpw@inter7.com
Date: Sun, 14 Sep 2003 20:54:39 -0400

    I support an ISP remotely, which is running FreeBSD-4.2-RELEASE with
    vpopmail-4.9.6. I know they're old, but it would be very difficult to
    upgrade now due to the site's remoteness.

    The machine was recently rebooted and vpopmail's POP now crashes upon
    successful authentication (names changed for privacy, sorry):

      chris@PECTOPAH<104> telnet foo.example.net pop3
      Trying 217.161.116.36...
      Connected to foo.example.net.
      Escape character is '^]'.
      +OK <32620.1063584541@foo.example.net>
      user chris@email.zz
      +OK
      pass MyPass
      -ERR aack, child crashed
      Connection closed by foreign host.

    If you enter a bogus passwd, it gives auth fail msg, so auth is
    working: it only complains about child crash if I use the correct
    password. It's not doing anything fancy like MySQL, just
    authenticating from the vpasswd.cdb file.

    My system startup file is straight-forward:

      env - PATH="/var/qmail/bin:/usr/local/bin" \
      tcpserver 0 pop3 /var/qmail/bin/qmail-popup foo.example.net \
      /usr/local/vpopmail/bin/vchkpw /var/qmail/bin/qmail-pop3d Maildir &

    If I execute the chain of commands from the command line, it works fine:

      foo# /var/qmail/bin/qmail-popup foo.example.net \
      /usr/local/vpopmail/bin/vchkpw /var/qmail/bin/qmail-pop3d Maildir
      +OK <32749.1063585173@foo.example.net>
      user chris@email.zz
      +OK
      pass MyPass
      +OK
      list
      +OK
      1 776
      2 588
      3 588
      4 666
      .

    /var/log/messages shows:

      Sep 15 04:27:58 foo /kernel: pid 32838 (vchkpw), uid 0: exited on signal 11 (core dumped)

    It also shows less frequently:

      Sep 15 04:22:50 foo /kernel: pid 32791 (vdelivermail), uid 89: exited on signal 11 (core dumped)

    Sure enough, the core file exists, in /usr/local/vpopmail/domains/email.zz:

      -rw------- 1 root vchkpw 339968 Sep 15 03:17 vchkpw.core

    At this point, I'm stuck, I don't know how to track down the problem.
    I naively try:

      foo# gdb /usr/local/vpopmail/bin/vchkpw vchkpw.core
      GNU gdb 4.18
      Copyright 1998 Free Software Foundation, Inc.
      GDB is free software, covered by the GNU General Public License, and you are
      welcome to change it and/or distribute copies of it under certain conditions.
      Type "show copying" to see the conditions.
      There is absolutely no warranty for GDB. Type "show warranty" for details.
      This GDB was configured as "i386-unknown-freebsd"...
      (no debugging symbols found)...
      Core was generated by `vchkpw'.
      Program terminated with signal 11, Segmentation fault.
      Reading symbols from /usr/lib/libcrypt.so.2...(no debugging symbols found)...
      done.
      Reading symbols from /usr/lib/libc.so.4...(no debugging symbols found)...done.
      Reading symbols from /usr/libexec/ld-elf.so.1...(no debugging symbols found)...
      done.
      #0 0x8049e96 in free ()
      (gdb) where
      #0 0x8049e96 in free ()
      #1 0xbfbffb40 in ?? ()
      #2 0x804ca6e in free ()
      #3 0x80497ff in free ()
      #4 0x80492c5 in free ()

    Any suggestions as to what's wrong and how to fix it? I didn't find
    anything relevant doing a Google which fits my situation.

    Thanks.
    _______________________________________________
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  • Next message: Chris Shenton: "Re: vpopmail POP: "ERR aac, chiled crashed" after reboot, core dumped"

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