Bug #52312 [Fbk]: PHP lstat problem
Edit report at http://bugs.php.net/bug.php?id=52312edit=1
ID: 52312
Updated by: ras...@php.net
Reported by: v dot damore at gmail dot com
Summary: PHP lstat problem
Status: Feedback
Type: Bug
Package: Safe Mode/open_basedir
Operating System: Linux
PHP Version: 5.2.13
New Comment:
I don't see that here. Attach gdb and set a breakpoint on lstat and see
who is
calling them.
Previous Comments:
[2010-07-12 18:21:50] v dot damore at gmail dot com
I have already tried with 5.3 and I was thinking to open an new bug
because I have same behavior, there is only a change in the order of
execution of lstat from fullpath to /usr :
7339 chdir(/usr/local/myspace/webspace/httpdocs) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 open(/usr/local/myspace/webspace/httpdocs/test.php, O_RDONLY) =
16
7339 fstat(16, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 fstat(16, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 fstat(16, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 mmap(NULL, 19, PROT_READ, MAP_SHARED, 16, 0) = 0x2adfec195000
7339 munmap(0x2adfec195000, 19)= 0
7339 close(16) = 0
7339 chdir(/)= 0
[2010-07-12 18:03:54] paj...@php.net
Can you try with 5.3 please?
[2010-07-12 17:51:24] v dot damore at gmail dot com
I tried again with a simple script test.php '? echo Ciao ?'
realpath_cache_size=1024k
realpath_cache_ttl=600
I have always same behavior (also second and following times I try to
call curl http://damorealt.xoom.it/test.php:
13692 chdir(/usr/local/myspace/webspace/httpdocs) = 0
13692 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
13692 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
13692 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
13692 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
13692 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
13692 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
13692 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
13692 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
13692 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
13692 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
13692 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
13692 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
13692 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
13692 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
13692 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
13692 lstat(/usr/local/myspace/webspace,
Bug #52312 [Fbk]: PHP lstat problem
Edit report at http://bugs.php.net/bug.php?id=52312edit=1
ID: 52312
Updated by: ras...@php.net
Reported by: v dot damore at gmail dot com
Summary: PHP lstat problem
Status: Feedback
Type: Bug
Package: Safe Mode/open_basedir
Operating System: Linux
PHP Version: 5.2.13
New Comment:
5.3. I haven't looked at 5.2 in 2+ years.
Previous Comments:
[2010-07-12 19:07:06] v dot damore at gmail dot com
where I have attach gdb, on 5.2.13 or on 5.3.2 ?
[2010-07-12 19:00:40] ras...@php.net
I don't see that here. Attach gdb and set a breakpoint on lstat and see
who is
calling them.
[2010-07-12 18:21:50] v dot damore at gmail dot com
I have already tried with 5.3 and I was thinking to open an new bug
because I have same behavior, there is only a change in the order of
execution of lstat from fullpath to /usr :
7339 chdir(/usr/local/myspace/webspace/httpdocs) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 open(/usr/local/myspace/webspace/httpdocs/test.php, O_RDONLY) =
16
7339 fstat(16, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 fstat(16, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 fstat(16, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 mmap(NULL, 19, PROT_READ, MAP_SHARED, 16, 0) = 0x2adfec195000
7339 munmap(0x2adfec195000, 19)= 0
7339 close(16) = 0
7339 chdir(/)= 0
[2010-07-12 18:03:54] paj...@php.net
Can you try with 5.3 please?
[2010-07-12 17:51:24] v dot damore at gmail dot com
I tried again with a simple script test.php '? echo Ciao ?'
realpath_cache_size=1024k
realpath_cache_ttl=600
I have always same behavior (also second and following times I try to
call curl http://damorealt.xoom.it/test.php:
13692 chdir(/usr/local/myspace/webspace/httpdocs) = 0
13692 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
13692 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
13692 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
13692 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
13692 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
13692 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
13692 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
13692 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
13692 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
13692 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
13692 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
13692
Bug #52312 [Fbk]: PHP lstat problem
Edit report at http://bugs.php.net/bug.php?id=52312edit=1
ID: 52312
Updated by: ras...@php.net
Reported by: v dot damore at gmail dot com
Summary: PHP lstat problem
Status: Feedback
Type: Bug
Package: Safe Mode/open_basedir
Operating System: Linux
PHP Version: 5.2.13
New Comment:
It seems like your realpath cache isn't working at all.
Could you set a breakpoint on realpath_cache_find and step into it the
second time
it hits those stat calls. Does it go into the while(bucket) loop there
at all?
Previous Comments:
[2010-07-12 23:48:10] v dot damore at gmail dot com
gdb reproduce the behavior reported in my comments, I have uploaded
result of your request at
http://damore.xoom.it/apache-2.2_php-5.3.2_break-lstat.txt
[2010-07-12 19:09:00] ras...@php.net
5.3. I haven't looked at 5.2 in 2+ years.
[2010-07-12 19:07:06] v dot damore at gmail dot com
where I have attach gdb, on 5.2.13 or on 5.3.2 ?
[2010-07-12 19:00:40] ras...@php.net
I don't see that here. Attach gdb and set a breakpoint on lstat and see
who is
calling them.
[2010-07-12 18:21:50] v dot damore at gmail dot com
I have already tried with 5.3 and I was thinking to open an new bug
because I have same behavior, there is only a change in the order of
execution of lstat from fullpath to /usr :
7339 chdir(/usr/local/myspace/webspace/httpdocs) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs/test.php,
{st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 lstat(/usr/local/myspace/webspace/httpdocs,
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace/webspace, {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0
7339 lstat(/usr/local/myspace, {st_mode=S_IFDIR|0755, st_size=4096,
...}) = 0
7339 lstat(/usr/local, {st_mode=S_IFDIR|0755, st_size=4096, ...}) =
0
7339 lstat(/usr, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7339 open(/usr/local/myspace/webspace/httpdocs/test.php, O_RDONLY) =
16
7339 fstat(16, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 fstat(16, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 fstat(16, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
7339 mmap(NULL, 19, PROT_READ, MAP_SHARED, 16, 0) = 0x2adfec195000
7339 munmap(0x2adfec195000, 19)= 0
7339 close(16) = 0
7339 chdir(/)= 0
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/bug.php?id=52312
--
Edit this bug report at http://bugs.php.net/bug.php?id=52312edit=1
Bug #52312 [Fbk]: PHP lstat problem
Edit report at http://bugs.php.net/bug.php?id=52312edit=1 ID: 52312 Updated by: ras...@php.net Reported by: v dot damore at gmail dot com Summary: PHP lstat problem Status: Feedback Type: Bug Package: Safe Mode/open_basedir Operating System: Linux PHP Version: 5.2.13 New Comment: Actually, try this simple test.php script: pre ?php var_dump(realpath_cache_get()); ? /pre That should tell you what is getting cached. Previous Comments: [2010-07-13 00:17:16] ras...@php.net It seems like your realpath cache isn't working at all. Could you set a breakpoint on realpath_cache_find and step into it the second time it hits those stat calls. Does it go into the while(bucket) loop there at all? [2010-07-12 23:48:10] v dot damore at gmail dot com gdb reproduce the behavior reported in my comments, I have uploaded result of your request at http://damore.xoom.it/apache-2.2_php-5.3.2_break-lstat.txt [2010-07-12 19:09:00] ras...@php.net 5.3. I haven't looked at 5.2 in 2+ years. [2010-07-12 19:07:06] v dot damore at gmail dot com where I have attach gdb, on 5.2.13 or on 5.3.2 ? [2010-07-12 19:00:40] ras...@php.net I don't see that here. Attach gdb and set a breakpoint on lstat and see who is calling them. The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/bug.php?id=52312 -- Edit this bug report at http://bugs.php.net/bug.php?id=52312edit=1
Bug #52312 [Fbk]: PHP lstat problem
Edit report at http://bugs.php.net/bug.php?id=52312edit=1
ID: 52312
Updated by: ras...@php.net
Reported by: v dot damore at gmail dot com
Summary: PHP lstat problem
Status: Feedback
Type: Bug
Package: Safe Mode/open_basedir
Operating System: Linux
PHP Version: 5.2.13
New Comment:
Set a bp and step through tsrm_realpath_r and figure out why it isn't
getting to
the realptath_cache_find() call there. Seems like it should be getting
there from
the backtraces.
Previous Comments:
[2010-07-13 00:52:21] v dot damore at gmail dot com
Please also note that realpath_cache_size and realpath_cache_ttl are
currently set to following values:
[r...@svilpar4 ~]# curl http://damorealt.xoom.it/phpinfo.php | grep
real
trtd class=erealpath_cache_size/tdtd class=v1024k/tdtd
class=v1024k/td/tr
trtd class=erealpath_cache_ttl/tdtd class=v600/tdtd
class=v600/td/tr
[2010-07-13 00:47:13] v dot damore at gmail dot com
I have executed script:
pre
?php
var_dump(realpath_cache_get());
?
/pre
[r...@svilpar4 ~]# curl http://damorealt.xoom.it/test.php
pre
array(0) {
}
/pre
[2010-07-13 00:38:32] v dot damore at gmail dot com
Please note, gdb output I sent is related to third time I have called
curl http://damorealt.xoom.it/test.php
I have set break point as requested:
(gdb) break realpath_cache_find
Breakpoint 1 at 0x2b0b3c9f254d: file
/usr/local/sitipersonali/sitipersonali01/NSP_SERVICE/strillo/sources/php-5.3.2/TSRM/tsrm_virtual_cwd.c,
line 560.
(gdb) bt
#0 0x00391760db00 in __accept_nocancel () from
/lib64/libpthread.so.0
#1 0x2b0b3c1f4544 in apr_socket_accept () from
/usr/lib64/libapr-1.so.0
#2 0x004562e5 in unixd_accept ()
#3 0x00454006 in child_main ()
#4 0x0045416c in make_child ()
#5 0x00454701 in ap_mpm_run ()
#6 0x004220ef in main ()
(gdb) continue
Continuing.
During test call gdb as not broken execution.
Function realpath_cache_find is not called.
[2010-07-13 00:33:12] ras...@php.net
Actually, try this simple test.php script:
pre
?php
var_dump(realpath_cache_get());
?
/pre
That should tell you what is getting cached.
[2010-07-13 00:17:16] ras...@php.net
It seems like your realpath cache isn't working at all.
Could you set a breakpoint on realpath_cache_find and step into it the
second time
it hits those stat calls. Does it go into the while(bucket) loop there
at all?
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/bug.php?id=52312
--
Edit this bug report at http://bugs.php.net/bug.php?id=52312edit=1
