ID: 49098
Updated by: [email protected]
Reported By: bugs at timj dot co dot uk
Status: Open
Bug Type: Session related
Operating System: Linux
PHP Version: 5.2.10
New Comment:
Breakpoint 1, php_mysqli_set_error (mysql_errno=0, mysql_err=0xbd1f77
"")
at /path/to/php5.2-200911070930/ext/mysqli/mysqli.c:1001
Previous Comments:
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[2009-11-11 23:14:25] [email protected]
Could you set a gdb breakpoint on the php_mysqli_set_error call and
show the arguments passed to it?
I still don't see anything in the code around that part that would
cause this though. It feels like something else is stepping on global
memory here, but it is too consistent to be random memory corruption.
Would be nice if someone else could reproduce it.
------------------------------------------------------------------------
[2009-11-11 23:01:13] [email protected]
Yep. Also checked on 5.2, just in case.
Here's some valgrind from 5.3 for info:
==17517== Invalid free() / delete / delete[]
==17517== at 0x4A0633D: free (vg_replace_malloc.c:323)
==17517== by 0xABA17B9: php_mysqli_set_error (mysqli.c:1004)
==17517== by 0xABA61DD: zif_mysqli_real_connect (mysqli_api.c:1476)
==17517== by 0x656BD2: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:200)
==17517== by 0x652AFB: execute (zend_vm_execute.h:92)
==17517== by 0x656545: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:234)
==17517== by 0x652AFB: execute (zend_vm_execute.h:92)
==17517== by 0x656545: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:234)
==17517== by 0x652AFB: execute (zend_vm_execute.h:92)
==17517== by 0x656545: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:234)
==17517== by 0x652AFB: execute (zend_vm_execute.h:92)
==17517== by 0x656545: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:234)
==17517== Address 0xba0af20 is 0 bytes inside a block of size 1
free'd
==17517== at 0x4A0633D: free (vg_replace_malloc.c:323)
==17517== by 0xABA1348: zm_deactivate_mysqli (mysqli.c:711)
==17517== by 0x63165B: module_registry_cleanup (zend_API.c:1976)
==17517== by 0x63A3B3: zend_hash_reverse_apply (zend_hash.c:755)
==17517== by 0x6301EC: zend_deactivate_modules (zend.c:838)
==17517== by 0x5ED964: php_request_shutdown (main.c:1475)
==17517== by 0x6A065B: main (php_cli.c:1343)
==17517==
------------------------------------------------------------------------
[2009-11-11 22:50:47] [email protected]
What's the valgrind output then, same as before?
------------------------------------------------------------------------
[2009-11-11 22:48:14] [email protected]
Reverting the change from r281844 doesn't seem to fix it (tested on
5.3-snap200911111930)
------------------------------------------------------------------------
[2009-11-11 20:41:46] [email protected]
Yes it still segfaults in the same way in 5.3-snap200911111930.
Essentially the same valgrind output.
Going back to the original issue, it started happening in 5.2.10. A
diff of the "mysqli" directory between 5.2.9 and 5.2.10 shows only one
change: mysqli_api.c in SVN r281844.
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