Fix NULL deref when enabling TLS fails and the peer name needs to be reset - #21031
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ndossche wants to merge 1 commit into
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Fix NULL deref when enabling TLS fails and the peer name needs to be reset#21031ndossche wants to merge 1 commit into
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…reset
The code tries to read the context on NULL when
`php_stream_xport_crypto_setup` fails because by then `stream` is reset
to NULL.
This is also UB, so can cause miscompiles.
```
==1217==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000090 (pc 0x55d829ed3acf bp 0x7fff045f5770 sp 0x7fff045f4df0 T0)
==1217==The signal is caused by a READ memory access.
==1217==Hint: address points to the zero page.
#0 0x55d829ed3acf in php_stream_url_wrap_http_ex /work/php-src/ext/standard/http_fopen_wrapper.c:580
#1 0x55d829ed857e in php_stream_url_wrap_http /work/php-src/ext/standard/http_fopen_wrapper.c:1204
#2 0x55d82a15073d in _php_stream_open_wrapper_ex /work/php-src/main/streams/streams.c:2270
#3 0x55d829e78fa6 in zif_file_get_contents /work/php-src/ext/standard/file.c:409
#4 0x55d829bbfe39 in zif_phar_file_get_contents /work/php-src/ext/phar/func_interceptors.c:226
#5 0x55d82a0b7ed2 in zend_test_execute_internal /work/php-src/ext/zend_test/observer.c:306
#6 0x55d82a3e024a in ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER /work/php-src/Zend/zend_vm_execute.h:2154
#7 0x55d82a540995 in execute_ex /work/php-src/Zend/zend_vm_execute.h:116519
#8 0x55d82a5558b0 in zend_execute /work/php-src/Zend/zend_vm_execute.h:121962
#9 0x55d82a6ba0ab in zend_execute_script /work/php-src/Zend/zend.c:1980
#10 0x55d82a0ec8bb in php_execute_script_ex /work/php-src/main/main.c:2645
#11 0x55d82a0ecccb in php_execute_script /work/php-src/main/main.c:2685
#12 0x55d82a6bfc16 in do_cli /work/php-src/sapi/cli/php_cli.c:951
#13 0x55d82a6c21e3 in main /work/php-src/sapi/cli/php_cli.c:1362
#14 0x7f9e770491c9 (/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9) (BuildId: 274eec488d230825a136fa9c4d85370fed7a0a5e)
#15 0x7f9e7704928a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 274eec488d230825a136fa9c4d85370fed7a0a5e)
#16 0x55d829209b34 in _start (/work/php-src/build-dbg-asan/sapi/cli/php+0x609b34) (BuildId: aa149f943514fff0c491e1f199e30fed0e977f7c)
```
adrian-enspired
pushed a commit
to adrian-enspired/php-src
that referenced
this pull request
Aug 4, 2026
…reset
The code tries to read the context on NULL when
`php_stream_xport_crypto_setup` fails because by then `stream` is reset
to NULL.
This is also UB, so can cause miscompiles.
```
==1217==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000090 (pc 0x55d829ed3acf bp 0x7fff045f5770 sp 0x7fff045f4df0 T0)
==1217==The signal is caused by a READ memory access.
==1217==Hint: address points to the zero page.
#0 0x55d829ed3acf in php_stream_url_wrap_http_ex /work/php-src/ext/standard/http_fopen_wrapper.c:580
php#1 0x55d829ed857e in php_stream_url_wrap_http /work/php-src/ext/standard/http_fopen_wrapper.c:1204
php#2 0x55d82a15073d in _php_stream_open_wrapper_ex /work/php-src/main/streams/streams.c:2270
php#3 0x55d829e78fa6 in zif_file_get_contents /work/php-src/ext/standard/file.c:409
php#4 0x55d829bbfe39 in zif_phar_file_get_contents /work/php-src/ext/phar/func_interceptors.c:226
php#5 0x55d82a0b7ed2 in zend_test_execute_internal /work/php-src/ext/zend_test/observer.c:306
php#6 0x55d82a3e024a in ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER /work/php-src/Zend/zend_vm_execute.h:2154
php#7 0x55d82a540995 in execute_ex /work/php-src/Zend/zend_vm_execute.h:116519
php#8 0x55d82a5558b0 in zend_execute /work/php-src/Zend/zend_vm_execute.h:121962
php#9 0x55d82a6ba0ab in zend_execute_script /work/php-src/Zend/zend.c:1980
php#10 0x55d82a0ec8bb in php_execute_script_ex /work/php-src/main/main.c:2645
php#11 0x55d82a0ecccb in php_execute_script /work/php-src/main/main.c:2685
php#12 0x55d82a6bfc16 in do_cli /work/php-src/sapi/cli/php_cli.c:951
php#13 0x55d82a6c21e3 in main /work/php-src/sapi/cli/php_cli.c:1362
php#14 0x7f9e770491c9 (/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9) (BuildId: 274eec488d230825a136fa9c4d85370fed7a0a5e)
php#15 0x7f9e7704928a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 274eec488d230825a136fa9c4d85370fed7a0a5e)
php#16 0x55d829209b34 in _start (/work/php-src/build-dbg-asan/sapi/cli/php+0x609b34) (BuildId: aa149f943514fff0c491e1f199e30fed0e977f7c)
```
Closes phpGH-21468.
Closes phpGH-21031.
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The code tries to read the context on NULL when
php_stream_xport_crypto_setupfails because by thenstreamis reset to NULL.This is also UB, so can cause miscompiles.
This was found by a hybrid static-dynamic analyser that looks for inconsistent handling of error checks in bindings.