Fix segmentation fault in Randomizer::getBytes() if a user engine throws #9055
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This fixes:
==374077== Use of uninitialised value of size 8
==374077== at 0x532B06: generate (engine_user.c:39)
==374077== by 0x533F71: zim_Random_Randomizer_getBytes (randomizer.c:152)
==374077== by 0x7F581D: ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER (zend_vm_execute.h:1885)
==374077== by 0x8725BE: execute_ex (zend_vm_execute.h:55930)
==374077== by 0x877DB4: zend_execute (zend_vm_execute.h:60253)
==374077== by 0x7B0FD4: zend_execute_scripts (zend.c:1770)
==374077== by 0x6F1647: php_execute_script (main.c:2535)
==374077== by 0x937DA4: do_cli (php_cli.c:964)
==374077== by 0x938C3A: main (php_cli.c:1333)
==374077==
==374077== Invalid read of size 8
==374077== at 0x532B06: generate (engine_user.c:39)
==374077== by 0x533F71: zim_Random_Randomizer_getBytes (randomizer.c:152)
==374077== by 0x7F581D: ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER (zend_vm_execute.h:1885)
==374077== by 0x8725BE: execute_ex (zend_vm_execute.h:55930)
==374077== by 0x877DB4: zend_execute (zend_vm_execute.h:60253)
==374077== by 0x7B0FD4: zend_execute_scripts (zend.c:1770)
==374077== by 0x6F1647: php_execute_script (main.c:2535)
==374077== by 0x937DA4: do_cli (php_cli.c:964)
==374077== by 0x938C3A: main (php_cli.c:1333)
==374077== Address 0x11 is not stack'd, malloc'd or (recently) free'd
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@TimWolla P.S.: The CI is probably a random failure, my macOS tests succeeded. |
Hmmm. I am not sure about this either. I will find time to check the stack trace during SEGV. |
Yes, it uses an exception: #5768 Discussion: https://externals.io/message/107497 |
cmb69
approved these changes
Jul 20, 2022
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I'm a bit surprised that the exception check also fixes the SEGV in the
exit()case. Doesexit()use an exception internally or is my fix not actually correct and just happens to work for whatever reason?/cc @zeriyoshi