Edit report at https://bugs.php.net/bug.php?id=61415&edit=1
ID: 61415
Updated by: cataphr...@php.net
Reported by: info at simonecaruso dot com
Summary: zend_alter_ini_entry failuers
Status: Open
Type: Bug
Package: Safe Mode/open_basedir
Operating System: Linux
PHP Version: 5.3.10
Block user comment: N
Private report: N
New Comment:
The fact it worked in 5.2 doesn't imply your code had no bug. It may mean that
a bug has always existed, but by luck it wasn't triggered by 5.2. Of course, if
you could identify the specific commit that triggers the problem, it could shed
light on this problem. If you can automate the tests, you can easily run
something a bisection procedure to find such commit.
Previous Comments:
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[2012-03-16 23:27:31] info at simonecaruso dot com
I don't think it's a my module problem because with 5.2 i dont have this
problem
(i did the sames tests for 5.3, same apache, same config), i moved to 5.3 from
less
than one month. I don't think it's a concurrency related issue too, the failure
are
too much rare i think.
I did a diff between 5.2 and 5.3 and saw there are major changes to
fopen_wrapper.c, and i have this problem only for open_basedir, that's why i
opened
the bug.
I'll try with other stages in the hope this can help.
------------------------------------------------------------------------
[2012-03-16 21:41:22] cataphr...@php.net
I assume you're using the prefork SAPI, as the stack trace shows you're not
using ZTS. In that case, I find strange your claim this is a concurrency issue.
More likely, the problem would be in your module and I don't know anything
about Apache modules lifecycle to even guess where the problem could be.
You could try passing another value for stage as the ini update handler for
open_basedir can never fail for stages PHP_INI_STAGE_STARTUP,
PHP_INI_STAGE_SHUTDOWN, PHP_INI_STAGE_ACTIVATE,PHP_INI_STAGE_DEACTIVATE, but
this would most likely just mask the underlying problem. You can also try
running Apache under valgrind with --trace-children and see if you get
something.
------------------------------------------------------------------------
[2012-03-16 18:07:23] info at simonecaruso dot com
It breaks always at zend_ini.c:300
The data i pass is always correct, but sometimes i get a FAILURE.
Breakpoint 3, zend_alter_ini_entry_ex (name=0x7f2de6128199 "open_basedir",
name_length=13,
new_value=0x7f2debd02e48 "/tmp/:/usr/share/php/:.:/home/www-
data/musitalia.com/html/", new_value_length=58, modify_type=4,
stage=16,
force_change=0)
at /root/php-5.3.10/Zend/zend_ini.c:300
300 return FAILURE;
(gdb) bt full
#0 zend_alter_ini_entry_ex (name=0x7f2de6128199 "open_basedir", name_length=13,
new_value=0x7f2debd02e48 "/tmp/:/usr/share/php/:.:/home/www-
data/musitalia.com/html/", new_value_length=58, modify_type=4,
stage=16,
force_change=0)
at /root/php-5.3.10/Zend/zend_ini.c:300
ini_entry = 0x7f2debb35d30
duplicate = 0x7f2debaf3140 'Z' <repeats 59 times>, "N\230D\300ZQ\twe-
\177"
modifiable = 7 '\a'
modified = 1 '\001'
#1 0x00007f2de77f00d0 in zend_alter_ini_entry (name=0x7f2de6128199
"open_basedir", name_length=13,
new_value=0x7f2debd02e48 "/tmp/:/usr/share/php/:.:/home/www-
data/musitalia.com/html/", new_value_length=58, modify_type=4,
stage=16)
at /root/php-5.3.10/Zend/zend_ini.c:249
No locals.
#2 0x00007f2de6126c1d in mod_vhost_ldap_translate_name (r=0x7f2debd01570) at
mod_vhost_ldap_ng.c:862
reqc = 0x7f2deb4b0510
conf = 0x7f2deba31038
core = 0x7f2deb9695e8
ld = 0x0
realfile = 0x0
alias = 0x0
i = 0
ret = 0
str = {0x0, 0x0, 0x0}
ldapmsg = 0x0
vhostentry = 0x0
openbasedir = 0x7f2debd02e48 "/tmp/:/usr/share/php/:.:/home/www-
data/musitalia.com/html/"
include = 0x7f2debd02e08 "/tmp/:/usr/share/php/:.:/home/www-
data/musitalia.com/html/"
------------------------------------------------------------------------
[2012-03-16 15:59:22] info at simonecaruso dot com
It will take some time for me to debug into php code, even because the problem
happen only on the ~5% of requests, my users notice the problem only with my
server are under load.
For now, I can add this: we have this problem since migrated from 5.2.6 to
5.3.10.
------------------------------------------------------------------------
[2012-03-16 14:25:35] cataphr...@php.net
zend_alter_ini_entry_ex has several failure paths. It would be helpful to know
which one is being triggered. Can you investigate this? You can try first by
starting apache under gdb with the -X option.
------------------------------------------------------------------------
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