Memory Leak Detected by AddressSanitizer During `make test`

[ElinorCoding]

Description

Hello PHP team,

I encountered a memory leak issue while running make test after building PHP with AddressSanitizer enabled. The leak was detected in the zend_extension_startup function, with a total of 32,800 bytes leaked in one allocation.

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Steps to Reproduce

1. Configure PHP with AddressSanitizer and coverage flags:

   ./configure CXX="clang++" CC="clang" CFLAGS="-g -fPIC -fsanitize=address,fuzzer-no-link -fsanitize-coverage=edge,indirect-calls" CXXFLAGS="-g -fPIC -fsanitize=address,fuzzer-no-link -fsanitize-coverage=edge,indirect-calls"  

Build PHP:

make -j5 

Run the test suite:

make test  

Error Output

=================================================================  
==275758==ERROR: LeakSanitizer: detected memory leaks  

Direct leak of 32800 byte(s) in 1 object(s) allocated from:  
    #0 0x6b4e17 in malloc /home/xjy/fuzz/else/llvm-project/compiler-rt/lib/asan/asan_malloc_linux.cpp:69:3  
    #1 0x2012f94 in __zend_malloc /home/xjy/fuzz/workspace/php-src/Zend/zend_alloc.c:3280:14  
    #2 0x71b454e0c87f  (<unknown module>)  
    #3 0x71b454e09c97  (<unknown module>)  
    #4 0x27e2efa in zend_extension_startup /home/xjy/fuzz/workspace/php-src/Zend/zend_extensions.c:196:7  
    #5 0x29ef0a2 in zend_llist_apply_with_del /home/xjy/fuzz/workspace/php-src/Zend/zend_llist.c:171:7  
    #6 0x27e2e12 in zend_startup_extensions /home/xjy/fuzz/workspace/php-src/Zend/zend_extensions.c:218:2  
    #7 0x1be1d17 in php_module_startup /home/xjy/fuzz/workspace/php-src/main/main.c:2299:2  
    #8 0x2b1b528 in php_cli_startup /home/xjy/fuzz/workspace/php-src/sapi/cli/php_cli.c:399:9  
    #9 0x2b138f1 in main /home/xjy/fuzz/workspace/php-src/sapi/cli/php_cli.c:1315:6  
    #10 0x71b45a829d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16  

SUMMARY: AddressSanitizer: 32800 byte(s) leaked in 1 allocation(s). 

which also can be seen in php-src/tests/run-test/test001.log

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Thank you for looking into this issue!
Best regards,
Elinor

PHP Version

commit hash: 1ae2c871d0

Operating System

• OS: Ubuntu 22.04.05 (Linux kernel 6.10.11) - Compiler: clang 14.0.0 - Architecture: x86_64

[iluuu1994]

I can't reproduce this. The <unknown module> indicates you're loading some other module that is lacking debug symbols. Can you try disabling all 3rd party extensions?

[ElinorCoding]

Thanks! when I use --disable-all on configure，there is no memory leak.

[iluuu1994]

Just to be sure, were any 3rd party extensions enabled, or just the ones bundled with PHP?