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Bug #61019 Out of memory on command stream_get_contents
Submitted: 2012-02-08 22:52 UTC Modified: -
Votes:12
Avg. Score:5.0 ± 0.0
Reproduced:12 of 12 (100.0%)
Same Version:12 (100.0%)
Same OS:11 (91.7%)
From: sachse at gmx dot net Assigned:
Status: Closed Package: Streams related
PHP Version: 5.3.10 OS: Linux testsystem1 3.0
Private report: No CVE-ID:
 [2012-02-08 22:52 UTC] sachse at gmx dot net
Description:
------------
Very seldom the script works but in most cases it crashes.
Segmentation fault were also seen.
ini_set("memory_limit", "4g"); - does also not help

1st run = OK
All further runs crashes.



Test script:
---------------
<?php
  $descriptorspec = array(0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
             	 					  1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
             						  2 => array("pipe", "w")   // stderr is a pipe that the child will write to
                         );
                         
  $process=proc_open("echo testtext",$descriptorspec,$pipes);
  if(is_resource($process))
  {
    stream_set_blocking($pipes[0],false);
    stream_set_blocking($pipes[1],false);
    stream_set_blocking($pipes[2],false);
  	stream_set_write_buffer($pipes[0],0);
  	stream_set_read_buffer($pipes[1],0);
   	stream_set_read_buffer($pipes[2],0);
   	$stdin_stream="";
   	$stderr_stream="";

    echo "External command executed\n";   	
    do                                     	
    {
  	  $process_state=proc_get_status($process);
 	    $tmp_stdin=stream_get_contents($pipes[1]);   	
   	  if($tmp_stdin) 
  	  {
    	 $stdin_stream=$stdin_stream.$tmp_stdin;
    	}
    	$tmp_stderr=stream_get_contents($pipes[2]);
    	if($tmp_stderr) 
    	{
     	  $stderr_stream=$stderr_stream.$tmp_stderr;
     	}
  	  sleep(1);
  	}while($process_state['running']);

    echo "External command exit: ".$process_state['exitcode']."\n";
    
    //read outstanding data
    $tmp_stdin=stream_get_contents($pipes[1]);   	
 	  if($tmp_stdin) 
	  {
  	 $stdin_stream=$stdin_stream.$tmp_stdin;
  	}
  	$tmp_stderr=stream_get_contents($pipes[2]);
  	if($tmp_stderr) 
  	{
   	  $stderr_stream=$stderr_stream.$tmp_stderr;
   	}

    fclose ($pipes[0]);
    fclose ($pipes[1]);
    fclose ($pipes[2]);
  
    proc_close($process);    
   	
   	echo "STDOUT: ".$stdin_stream."\n";
   	echo "STDERR: ".$stderr_stream."\n";
  }
  else
  {
    echo "Can't start external command\n";
  }                         
?>


Expected result:
----------------
External command executed
External command exit: 0
STDOUT: testtext

STDERR: 

Actual result:
--------------
External command executed
PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 133431296 bytes) in /var/www/localhost/htdocs/jobmanager/runcmd.php on line 23

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 133431296 bytes) in /var/www/localhost/htdocs/jobmanager/runcmd.php on line 23

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2014-04-02 13:39 UTC] mike@php.net
Automatic comment on behalf of mike
Revision: http://git.php.net/?p=php-src.git;a=commit;h=1ec83d44a1601c3560f430e08af9698bf8fb075c
Log: Fixed bug #61019 (Out of memory on command stream_get_contents)
 [2014-04-02 13:39 UTC] mike@php.net
-Status: Open +Status: Closed
 [2014-04-03 08:02 UTC] ab@php.net
Automatic comment on behalf of mike
Revision: http://git.php.net/?p=php-src.git;a=commit;h=1ec83d44a1601c3560f430e08af9698bf8fb075c
Log: Fixed bug #61019 (Out of memory on command stream_get_contents)
 [2014-04-03 08:04 UTC] ab@php.net
Automatic comment on behalf of mike
Revision: http://git.php.net/?p=php-src.git;a=commit;h=1ec83d44a1601c3560f430e08af9698bf8fb075c
Log: Fixed bug #61019 (Out of memory on command stream_get_contents)
 [2014-04-10 04:47 UTC] tyrael@php.net
Automatic comment on behalf of mike
Revision: http://git.php.net/?p=php-src.git;a=commit;h=1ec83d44a1601c3560f430e08af9698bf8fb075c
Log: Fixed bug #61019 (Out of memory on command stream_get_contents)
 [2014-10-07 23:15 UTC] stas@php.net
Automatic comment on behalf of mike
Revision: http://git.php.net/?p=php-src-security.git;a=commit;h=1ec83d44a1601c3560f430e08af9698bf8fb075c
Log: Fixed bug #61019 (Out of memory on command stream_get_contents)
 [2014-10-07 23:26 UTC] stas@php.net
Automatic comment on behalf of mike
Revision: http://git.php.net/?p=php-src-security.git;a=commit;h=1ec83d44a1601c3560f430e08af9698bf8fb075c
Log: Fixed bug #61019 (Out of memory on command stream_get_contents)
 
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