ID: 49098 Updated by: ras...@php.net 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:
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. Previous Comments: ------------------------------------------------------------------------ [2009-11-11 23:01:13] t...@php.net 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] j...@php.net What's the valgrind output then, same as before? ------------------------------------------------------------------------ [2009-11-11 22:48:14] t...@php.net Reverting the change from r281844 doesn't seem to fix it (tested on 5.3-snap200911111930) ------------------------------------------------------------------------ [2009-11-11 20:41:46] t...@php.net 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. ------------------------------------------------------------------------ [2009-11-11 08:48:02] j...@php.net To narrow this down a bit: Does it happen with latest PHP 5.3 snapshot? ------------------------------------------------------------------------ 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/49098 -- Edit this bug report at http://bugs.php.net/?id=49098&edit=1