#35886 [Opn->Fbk]: file_get_contents fails with some combinations of offset & maxlen

ID: 35886 Updated by: tony2001@php.net Reported By: chris at lodesys dot com -Status: Open +Status: Feedback Bug Type: Reproducible crash Operating System: Windows 2000 PHP Version: 5CVS-2006-01-03 (snap) New Comment: Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. Works perfectly fine here. Previous Comments: ------------------------------------------------------------------------ [2006-01-03 20:01:56] chris at lodesys dot com Description: ------------ This one is weird. For some value of offset & maxlen, file_get_contents will fail and crash PHP. (I'm running under Apache 1.3.34 and get a Dr. Watson). The combination may have something to do with offset + maxlen just above 4096, but even that's not consistant. Reproduce code: --------------- $x = file_get_contents("C:/php/news.txt", FALSE, NULL, 500, 3596); // WORKS $x = file_get_contents("C:/php/news.txt", FALSE, NULL, 500, 3597); // FAILS $x = file_get_contents("C:/php/news.txt", FALSE, NULL, 500, 4096); // FAILS $x = file_get_contents("C:/php/news.txt", FALSE, NULL, 500, 4097); // WORKS $x = file_get_contents("C:/php/news.txt", FALSE, NULL, 1000, 4096); // FAILS $x = file_get_contents("C:/php/news.txt", FALSE, NULL, 1000, 4097); // WORKS $x = file_get_contents("C:/php/news.txt", FALSE, NULL, 0, 4096); // WORKS $x = file_get_contents("C:/php/news.txt", FALSE, NULL, 0, 4097); // WORKS Expected result: ---------------- All combinations of offset & maxlen should work as news.txt is 74 KB long. Actual result: -------------- PHP fails in some instances (see above) with Dr. Watson reporting "Application exception occurred: App: (pid=1828)[apache.exe] Exception number: c0000005 (access violation)" Using ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=35886&edit=1