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glibc error from tar?

Discussion in 'Data Protection' started by Mysticeti, Nov 15, 2014.

  1. Mysticeti

    Mysticeti Well-Known Member

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    Just started seeing the below error and I noticed that the last successful backup was before glibc was updated by upcp on the 9th.

    This is legacy backup w/ FTP (I tried switching to the new backup but apparently it works differently w/r/t staging the tar files and I ran out of diskspace).

    I just reran the backup using --force and the same error occurred.

    Note that the error only happens for one of the accounts on this system.

    Code:
    WARN: Warnings(s) encountered in tar during archiving:
    *** glibc detected *** pkgacct - username - av: 3: double free or corruption (out): 0x000000001f178400 ***
    ======= Backtrace: =========
    /lib64/libc.so.6[0x2b4174fc34af]
    /lib64/libc.so.6(cfree+0x4b)[0x2b4174fc77ab]
    /lib64/libc.so.6(closedir+0xd)[0x2b4174fe813d]
    /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/cpanel_lib/x86_64-linux-64int/auto/Archive/Tar/Builder/Builder.so[0x2b417a381f52]
    /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/cpanel_lib/x86_64-linux-64int/auto/Archive/Tar/Builder/Builder.so(b_stack_destroy+0x28)[0x2b417a382ccb]
    /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/cpanel_lib/x86_64-linux-64int/auto/Archive/Tar/Builder/Builder.so(b_find+0x3bb)[0x2b417a382381]
    /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/cpanel_lib/x86_64-linux-64int/auto/Archive/Tar/Builder/Builder.so[0x2b417a383725]
    /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/5.14.4/x86_64-linux-64int/CORE/libperl.so(Perl_pp_entersub+0x8a1)[0x2b41741d9e36]
    /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/5.14.4/x86_64-linux-64int/CORE/libperl.so(Perl_runops_standard+0x11)[0x2b41741d8641]
    /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/5.14.4/x86_64-linux-64int/CORE/libperl.so(perl_run+0x1c0)[0x2b417418acd6]
    pkgacct - username - av: 3(main+0xa7)[0x400ddf]
    /lib64/libc.so.6(__libc_start_main+0xf4)[0x2b4174f6f9f4]
    pkgacct - username - av: 3[0x400c89]
     
  2. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello :)

    Do you notice any output to /var/log/messages or /var/log/dmesg when this happens? Are any VPS resource limits met if this is a VPS, or do you notice a lack of available memory when this happens?

    Thank you.
     
  3. Mysticeti

    Mysticeti Well-Known Member

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    Hi Michael,

    Nothing unusual in /var/log/messages. /var/log/dmesg is empty.

    This is a VPS but it's very lightly loaded, not even close to any memory limits, and there are much larger accounts before and after this one that are archived and backed up just fine.

    FWIW - The recent update to 11.46.0 build 17 didn't seem to help.

    Thanks.
     
    #3 Mysticeti, Nov 20, 2014
    Last edited: Nov 20, 2014
  4. cPanelMichael

    cPanelMichael Forums Analyst
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    Feel free to open a support ticket using the link in my signature so we can take a closer look. You can post the ticket number here so we can update this thread with the outcome.

    Thank you.
     
  5. Mysticeti

    Mysticeti Well-Known Member

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    Thanks Michael. Ticket 5779819 submitted.
     
  6. cPanelMichael

    cPanelMichael Forums Analyst
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    To update, it was determined the directory permissions were not sufficient for one of the directories associated with an account. The user was advised to supply more lax permissions to this path to allow the backup to complete successfully.

    Thank you.
     
  7. Mysticeti

    Mysticeti Well-Known Member

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    The end user ended up deleting the folder in question. It is somewhat odd that the issue only recently surfaced and that folder's permissions have been set restrictive for years now. Also, other folders in other users are similarly restrictive and backup does not throw glibc errors for those users.

    Anyway, backup is now successful and the user is happy.
     
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