From: [EMAIL PROTECTED]
Operating system: RedHat Linux 7.2
PHP version: 4.0.6
PHP Bug Type: Filesystem function related
Bug description: require_once() causes segfault
I have an old server running RedHat 6.2, Aolserver 3.0, PHP 4.0.6 (compiled
as a module) and SquirrelMail (a webmail application written in PHP) 1.0.6
just fine.
I'm trying to setup a new server with RedHat 7.2, Aolserver 3.4.2, PHP
4.0.6, and SquirrelMail 1.2.0-rc3 but I run into a consistent segfault. I
haven't been able to write a script that abstracts the problem but it
always happens at the same point in SquirrelMail: after you login, in the
function squimap_mailbox_list (in functions/imap_mailbox.php). The
offending line is functions/imap_mailbox.php:217:
require_once('../src/load_prefs.php');
This file exists and is fine, and is require_once'd several times before
this invocation (and I've stepped through other invocations of
virtual_file_ex to see that it works)
but this line always segfaults:
backtrace:
#0 0x400aedd3 in canonicalize (
name=0x82f9c38
"/usr/local/aolserver-3.4.2/servers/webmail/pages/squirrelmail-1.2.0-rc3/src/../src/load_prefs.php",
resolved=0x40522edc "")
at canonicalize.c:88
#1 0x402bde61 in virtual_file_ex (state=0x40523f0c,
path=0x82c00dc "../src/load_prefs.php", verify_path=0)
at tsrm_virtual_cwd.c:299
#2 0x402be427 in virtual_fopen (path=0x82c00dc "../src/load_prefs.php",
mode=0x402d1e07 "rb") at tsrm_virtual_cwd.c:497
#3 0x40240a84 in php_fopen_and_set_opened_path (
path=0x82c00dc "../src/load_prefs.php", mode=0x402d1e07 "rb",
opened_path=0x40528880) at fopen_wrappers.c:235
#4 0x402410b9 in php_fopen_with_path (
filename=0x82c00dc "../src/load_prefs.php", mode=0x402d1e07 "rb",
path=0x402d35fb ".:/usr/local/lib/php", opened_path=0x40528880)
at fopen_wrappers.c:391
#5 0x402412e8 in php_fopen_url_wrapper (
path=0x82c00dc "../src/load_prefs.php", mode=0x402d1e07 "rb",
options=1,
issock=0x40525050, socketd=0x40525054, opened_path=0x40528880)
at fopen_wrappers.c:470
#6 0x4023ece1 in php_fopen_wrapper_for_zend (
filename=0x82c00dc "../src/load_prefs.php", opened_path=0x40528880)
at main.c:477
#7 0x40222f06 in execute (op_array=0x84668d0,
executor_globals=0x82282f8)
at ./zend_execute.c:1999
#8 0x40220e03 in execute (op_array=0x821b2d0,
executor_globals=0x82282f8)
at ./zend_execute.c:1544
#9 0x40220e03 in execute (op_array=0x83cf358,
executor_globals=0x82282f8)
at ./zend_execute.c:1544
#10 0x40220e03 in execute (op_array=0x834c908,
executor_globals=0x82282f8)
at ./zend_execute.c:1544
#11 0x40220e03 in execute (op_array=0x83df304,
executor_globals=0x82282f8)
at ./zend_execute.c:1544
#12 0x4022f1cd in zend_execute_scripts (type=8, compiler_globals=0x839f938,
executor_globals=0x82282f8, file_count=3) at zend.c:752
#13 0x402401c7 in php_execute_script (primary_file=0x405316cc,
compiler_globals=0x839f938, executor_globals=0x82282f8,
core_globals=0x839b6f0) at main.c:1206
#14 0x4023df92 in php_ns_module_main (ns_context=0x81ed510,
sapi_globals=0x8276c50) at aolserver.c:434
#15 0x4023e1df in php_ns_request_handler (context=0x8184658,
conn=0x819a8d0)
at aolserver.c:519
#16 0x08077bb7 in Ns_ConnRunRequest (conn=0x819a8d0) at op.c:196
#17 0x0807e2c2 in ConnRun (connPtr=0x819a8d0) at serv.c:882
#18 0x0807dc10 in NsConnThread (arg=0x81f5178) at serv.c:671
#19 0x0811833b in NsThreadMain (arg=0x81f6590) at thread.c:228
#20 0x4002dc6f in pthread_start_thread (arg=0x40531be0) at manager.c:284
#21 0x4002dd5f in pthread_start_thread_event (arg=0x40531be0) at
manager.c:308
and some extra gdb output:
[right before the segfault]
Breakpoint 9, canonicalize (
name=0x82f9c38
"/usr/local/aolserver-3.4.2/servers/webmail/pages/squirrelmail-1.2.0-rc3/src/../src/load_prefs.php",
resolved=0x40522edc "")
at canonicalize.c:88
88 rpath[0] = '/';
(gdb) print rpath[0]
$94 = 0 '\000'
(gdb) step
Program received signal SIGSEGV, Segmentation fault.
0x400aedd3 in canonicalize (
name=0x82f9c38
"/usr/local/aolserver-3.4.2/servers/webmail/pages/squirrelmail-1.2.0-rc3/src/../src/load_prefs.php",
resolved=0x40522edc "")
at canonicalize.c:88
88 rpath[0] = '/';
(gdb) info local
name = 0x82f9c38
"/usr/local/aolserver-3.4.2/servers/webmail/pages/squirrelmail-1.2.0-rc3/src/../src/load_prefs.php"
rpath = 0x40521dec ""
dest = 0x0
extra_buf = 0x0
start = 0x0
end = 0x0
rpath_limit = 0x40522deb "@"
num_links = 0
rpath = 0x40521dec ""
dest = 0x0
extra_buf = 0x0
end = 0x0
rpath_limit = 0x40522deb "@"
num_links = 0
php config:
./configure --with-aolserver=/usr/local/aolserver --without-mysql
--with-openssl --with-gettext
I've tried this on whatever other platforms I have handy. The same segfault
occurs with any combination of RedHat 7.0/7.2, Aolserver 3.0/3.4.2,
SquirrelMail 1.0.6/1.2.0-rc2/1.2.0-rc3.
Thanks
--
Edit bug report at: http://bugs.php.net/?id=14365&edit=1
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