Connection reset – Apache segmentation fault

  • Tybaze

    (@tybaze)


    12 years, 1 month ago

    Hello,

    Just for information, I’m using Ubuntu 10.04 LTS with default libapache2-mod-php (a standard installation)

    I try to install W3 Total Cache, and during activation my browser said “Connection reset by server”.
    I check my apache2, and the error log said “Segmentation Fault”.

    So I have check which PhP code raise this problem:
    File : “lib/W3/ConfigData.php”
    Line 134: $config = @eval(substr($content, 5));
    (Details: the file argument was : “/w3tc-config/master-admin.php”)

    The fix I do :
    @eval("$config = ".substr($content, 11));

    And now, the plugin can be activated.

    I think this is a PhP bug (5.3.2) but it still used.

    https://ww.wp.xz.cn/plugins/w3-total-cache/

Viewing 4 replies - 1 through 4 (of 4 total)
  • Thread Starter Tybaze

    (@tybaze)

    12 years, 1 month ago

    My Fix is wrong, please use

    @eval('$config = '.substr($content, 16));

    Adan0s

    (@adan0s)

    12 years, 1 month ago

    Hi there,

    after upgrading to 0.9.4 I have the same problem. The site is not working as soon the plugin is activated. Just like Tybaze I’m using Ubuntu 10.04.4.

    Other versions:

    Apache: 2.2.14
PHP: 5.3.2
WP: 3.8.2
W3TC: 0.9.4

    There’s nothing else in the logs, just a Segfault

    [Wed Apr 09 09:39:51 2014] [notice] child pid 28026 exit signal Segmentation fault (11)

    0.9.3 worked without any problem. The above mentioned fix does not work for me. :/

    Thread Starter Tybaze

    (@tybaze)

    12 years, 1 month ago

    This is possible my fix didn’t work, because I do a substr starting at 16, but I don’t know what is in your “/w3tc-config/master-admin.php” file.

    On the svn I can see a change in the method W3_ConfigData::get_array_from_file()

    You can fix it by replacing line 134/135:

    $content = @file_get_contents($filename);
$config = @eval(substr($content, 5));

    With :
    $config = include $filename;

    This will do the trick, I just tested it and it work.

    I don’t know if the dev of this plugin will read this but :
    I do not recommand to use “serialize/unserialize” for configuration, I recomand json_decode/encode.
    Serilize implementation can change between PHP versions, so it could break compatibility whereas json never change.
    More, json_decode/json_decode are faster than serialize. (but they do not manage Object, and here the configuration is an Array)

    spiritvn

    (@spiritvn)

    11 years, 2 months ago

    Hi Tybaze, really thanks for your fix, it worked for me and dont know why after 11 months it’s still exist 🙂

Viewing 4 replies - 1 through 4 (of 4 total)

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