From: runekl at opoint dot com
Operating system: All
PHP version: 5CVS-2003-12-13 (dev)
PHP Bug Type: *General Issues
Bug description: exec crash on long input lines
Description:
------------
If the command ran by exec outputs a line that is 2*EXEC_INPUT_BUF longer
than the previous line a segfault may occur. It is not difficult to see
why this happens just by reading the source code.
In exec.c, line 118, reads
if (buflen < (bufl + EXEC_INPUT_BUF)) {
This condition is correct only the first time, e.g when b=buf. I think
the like should be
if (buflen < (bufl + (b - buf) + EXEC_INPUT_BUF)) {
Reproduce code:
---------------
#!/usr/local/bin/php
<?php
$out = array();
$status = -1;
exec('/usr/bin/seq 5000 | tr \'\n\' \' \'', $out, $status);
print_r($out);
?>
Expected result:
----------------
Numbers from 1 to 5000 separated by blanks on one line.
Actual result:
--------------
segfault
--
Edit bug report at http://bugs.php.net/?id=26615&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=26615&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=26615&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=26615&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=26615&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=26615&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=26615&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=26615&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=26615&r=support
Expected behavior: http://bugs.php.net/fix.php?id=26615&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=26615&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=26615&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=26615&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=26615&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=26615&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=26615&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=26615&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=26615&r=float
