Re: [MRBS-general] Browser-specific codepath?

[Diego Z. <die...@un...>]

Il 20/06/2013 12:21, Diego Zuccato ha scritto:

> I'm having a reallt worrisome problem: sometimes I get a "500 internal server error" when accessing my MRBS install (1.4.8 w/ ACL patch). What I don't understand is that the same code works as expected in another browser on the same machine!
> The log file doesn't help much: it only says "premature end of script headers".
Seems it was something in Themes/default/header.inc , but I still
couldn't find WHAT. No apparent difference between a working one and a
SIGSEGV-one ... Bahf! Maybe the real problem lies elsewhere, ready to
byte my back when I less expect...

0x0829905f in tsrm_realpath_r (path=Cannot access memory at address
0xbf01df9c
) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:609
609
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:
No such file or directory.
        in
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c
(gdb) bt
#0  0x0829905f in tsrm_realpath_r (path=Cannot access memory at address
0xbf01df9c
) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:609
#1  0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=13, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=1,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#2  0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=17, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=1,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#3  0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=25, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=1,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#4  0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=33, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=1,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#5  0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=39, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=1,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#6  0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=43, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=1,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#7  0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=56, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=1,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#8  0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=63, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=1,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#9  0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=71, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=1,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#10 0x08299230 in tsrm_realpath_r (path=0xbf01ec8c "/srv/webhosts",
start=1, len=82, ll=0xbf01ec88, t=0xbf01ec84, use_realpath=1, is_dir=0,
link_is_dir=0x0)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:948
#11 0x08299ba9 in virtual_file_ex (state=0xbf01fcd4, path=0x9cb241c
"Themes/default/header.inc", verify_path=0, use_realpath=1)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/TSRM/tsrm_virtual_cwd.c:1128
#12 0x082a2f33 in expand_filepath_ex (filepath=0x9cb241c
"Themes/default/header.inc", real_path=0xbf024d5c "otazioni@",
relative_to=0x0, relative_to_len=<error type>)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/main/fopen_wrappers.c:867
#13 0x082a30c4 in expand_filepath (filepath=0x9cb241c
"Themes/default/header.inc", real_path=0xbf024d5c "otazioni@") at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/main/fopen_wrappers.c:815
#14 0x082a3c64 in php_check_specific_open_basedir (basedir=0xb25de8c
"/var/www/clients/client1/web20/web", path=0x9cb241c
"Themes/default/header.inc")
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/main/fopen_wrappers.c:163
#15 0x082a3fbe in php_check_open_basedir_ex (path=0x9cb241c
"Themes/default/header.inc", warn=1) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/main/fopen_wrappers.c:298
#16 0x082a4065 in php_check_open_basedir (path=0x9cb241c
"Themes/default/header.inc") at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/main/fopen_wrappers.c:274
#17 0x08229746 in php_stat (filename=0x9cb241c
"Themes/default/header.inc", filename_length=25, type=15,
return_value=0xb25de60)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/ext/standard/filestat.c:806
#18 0x0822ad6b in zif_file_exists (ht=1, return_value=0xb25de60,
return_value_ptr=0x0, this_ptr=0x0, return_value_used=1)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/ext/standard/filestat.c:1122
#19 0x08159f95 in phar_file_exists (ht=1, return_value=0xb25de60,
return_value_ptr=0x0, this_ptr=0x0, return_value_used=1)
    at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/ext/phar/func_interceptors.c:887
#20 0x0831ed1b in execute_internal (execute_data_ptr=0xb393408,
return_value_used=1) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_execute.c:1261
#21 0xb4da6fa3 in ?? () from /usr/lib/php5/20090626+lfs/suhosin.so
#22 0x0834abe8 in zend_do_fcall_common_helper_SPEC (execute_data=0xc) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_vm_execute.h:318
#23 0x083216ae in execute (op_array=0x9ce2b48) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_vm_execute.h:107
#24 0xb4da7404 in ?? () from /usr/lib/php5/20090626+lfs/suhosin.so
#25 0x0834a8d6 in zend_do_fcall_common_helper_SPEC (execute_data=0x0) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_vm_execute.h:340
#26 0x083216ae in execute (op_array=0x9ded110) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_vm_execute.h:107
#27 0xb4da7404 in ?? () from /usr/lib/php5/20090626+lfs/suhosin.so
#28 0x0834a8d6 in zend_do_fcall_common_helper_SPEC (execute_data=0x0) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_vm_execute.h:340
#29 0x083216ae in execute (op_array=0x9dec718) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_vm_execute.h:107
#30 0xb4da7404 in ?? () from /usr/lib/php5/20090626+lfs/suhosin.so
#31 0x0834a8d6 in zend_do_fcall_common_helper_SPEC (execute_data=0x0) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_vm_execute.h:340
#32 0x083216ae in execute (op_array=0x9df0c08) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_vm_execute.h:107
#33 0xb4da7404 in ?? () from /usr/lib/php5/20090626+lfs/suhosin.so
#34 0x0834a8d6 in zend_do_fcall_common_helper_SPEC (execute_data=0x0) at
/build/buildd-php5_5.3.3-7+squeeze15-i386-ZkI3KT/php5-5.3.3/Zend/zend_vm_execute.h:340

--
Diego Zuccato
Servizi Informatici
Dip. di Fisica e Astronomia (DIFA) - Università di Bologna
V.le Berti-Pichat 6/2 - 40127 Bologna - Italy
tel.: +39 051 20 95786
mail: die...@un...

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