Description:
------------
performing file operations through phar:// with filenames over MAXPATHLEN causes crash 

*** stack smashing detected ***: php terminated

Test script:
---------------
<?php
$p = new Phar('/tmp/a.phar');
file_exists('phar:///tmp/a.phar/'. str_repeat("a", 4100));

// only for this test case phar.readonly=Off is required

Expected result:
----------------
file_exists returning false

Actual result:
--------------
Program terminated with signal 6, Aborted.
#0  0x00007f5960d9cf77 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56      ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x00007f5960d9cf77 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007f5960da05e8 in __GI_abort () at abort.c:90
#2  0x00007f5960dda4fb in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7f5960eebf10 "*** %s ***: %s terminated\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:199
#3  0x00007f5960e7808c in __GI___fortify_fail (msg=<optimized out>, msg@entry=0x7f5960eebef8 "stack smashing detected") at fortify_fail.c:37
#4  0x00007f5960e78030 in __stack_chk_fail () at stack_chk_fail.c:28
#5  0x00000000004c048f in phar_set_inode (entry=0x7fff95d1c6d0) at /home/tratajczak/Downloads/php-master-201403261230/ext/phar/phar_internal.h:542
#6  0x6161616161616161 in ?? ()
...