Bug #75189 [Ana->Wfx]: Invalid read in zend_string_release()

Edit report at https://bugs.php.net/bug.php?id=75189&edit=1 ID: 75189 Updated by: nikic@php.net Reported by: fumfi dot 255 at gmail dot com Summary: Invalid read in zend_string_release() -Status: Analyzed +Status: Wont fix Type: Bug Package: *General Issues Operating System: Xubuntu 16.04 x64 PHP Version: 7.1.9 Block user comment: N Private report: N New Comment: The reproducer no longer works, and as it is a non-reduced one, it's hard to guess at what the issue here was originally. Previous Comments: ------------------------------------------------------------------------ [2017-09-12 13:39:45] laruence@php.net this is similar as https://bugs.php.net/bug.php?id=75128 ------------------------------------------------------------------------ [2017-09-11 15:07:57] fumfi dot 255 at gmail dot com Description: ------------ After some fuzz testing I found a crashing test case. Version: 7.18 Command: php php_ir_zend_string_release.php Faulting PHP script: https://frankowicz.me/storage/crashes/php_ir_zend_string_release.txt ASAN: ==3643==ERROR: AddressSanitizer: SEGV on unknown address 0x7f22bb400005 (pc 0x00000184bce4 bp 0x000002767b60 sp 0x7ffed871ccf0 T0) ==3643==The signal is caused by a READ memory access. #0 0x184bce3 in zend_string_release XYZ/php-7.1.8/Zend/zend_string.h:270:7 #1 0x184bce3 in zend_array_destroy XYZ/php-7.1.8/Zend/zend_hash.c:1311 #2 0x192c600 in zend_object_std_dtor XYZ/php-7.1.8/Zend/zend_objects.c:60:5 #3 0x1949bb5 in zend_objects_store_del XYZ/php-7.1.8/Zend/zend_objects_API.c:178:8 #4 0x17c742f in _zval_dtor_func XYZ/php-7.1.8/Zend/zend_variables.c:56:5 #5 0x184b84c in i_zval_ptr_dtor XYZ/php-7.1.8/Zend/zend_variables.h:48:4 #6 0x184b84c in zend_array_destroy XYZ/php-7.1.8/Zend/zend_hash.c:1305 #7 0x17c7463 in _zval_dtor_func XYZ/php-7.1.8/Zend/zend_variables.c:43:5 #8 0x1767a30 in i_zval_ptr_dtor XYZ/php-7.1.8/Zend/zend_variables.h:48:4 #9 0x1767a30 in zend_unclean_zval_ptr_dtor XYZ/php-7.1.8/Zend/zend_execute_API.c:210 #10 0x1851027 in _zend_hash_del_el_ex XYZ/php-7.1.8/Zend/zend_hash.c:997:3 #11 0x1851027 in _zend_hash_del_el XYZ/php-7.1.8/Zend/zend_hash.c:1020 #12 0x1851027 in zend_hash_graceful_reverse_destroy XYZ/php-7.1.8/Zend/zend_hash.c:1476 #13 0x1767f89 in shutdown_executor XYZ/php-7.1.8/Zend/zend_execute_API.c:279:3 #14 0x17ce8ca in zend_deactivate XYZ/php-7.1.8/Zend/zend.c:999:2 #15 0x1564144 in php_request_shutdown XYZ/php-7.1.8/main/main.c:1877:2 #16 0x1c4215c in do_cli XYZ/php-7.1.8/sapi/cli/php_cli.c:1160:3 #17 0x1c418e5 in main XYZ/php-7.1.8/sapi/cli/php_cli.c:1381:18 #18 0x7f22c87c782f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f) #19 0x43ac28 in _start (/usr/local/bin/php+0x43ac28) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV XYZ/php-7.1.8/Zend/zend_string.h:270:7 in zend_string_release ==3643==ABORTING ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75189&edit=1