Skip to content

sapi/fuzzer: Fetch function and call it directly instead of using a zval to hold the name #19030

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Jul 6, 2025
Merged

sapi/fuzzer: Fetch function and call it directly instead of using a zval to hold the name #19030

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
843c5f0
sapi/fuzzer: Fetch function and call it directly instead of using a z…
Girgias Jul 4, 2025
2465319
Remove unused variable and dtor
Girgias Jul 5, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 5 additions & 4 deletions sapi/fuzzer/fuzzer-execute-common.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -127,15 +127,16 @@ ZEND_ATTRIBUTE_UNUSED static void create_file(void) {
ZEND_ATTRIBUTE_UNUSED static void opcache_invalidate(void) {
steps_left = MAX_STEPS;
zend_exception_save();
zval retval, func, args[2];
ZVAL_STRING(&func, "opcache_invalidate");
zval retval, args[2];
zend_function *fn = zend_hash_str_find_ptr(CG(function_table), ZEND_STRL("opcache_invalidate"));
ZEND_ASSERT(fn != NULL);

ZVAL_STRING(&args[0], FILE_NAME);
ZVAL_TRUE(&args[1]);
call_user_function(CG(function_table), NULL, &func, &retval, 2, args);
zend_call_known_function(fn, NULL, NULL, &retval, 2, args, NULL);
ZEND_ASSERT(Z_TYPE(retval) == IS_TRUE);
zval_ptr_dtor(&args[0]);
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func);
zend_exception_restore();
}

Expand Down
9 changes: 5 additions & 4 deletions sapi/fuzzer/fuzzer-sapi.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -292,19 +292,20 @@ int fuzzer_do_request_from_buffer(

// Call named PHP function with N zval arguments
void fuzzer_call_php_func_zval(const char *func_name, int nargs, zval *args) {
zval retval, func;
zval retval;

zend_function *fn = zend_hash_str_find_ptr(CG(function_table), func_name, strlen(func_name));
ZEND_ASSERT(fn != NULL);

ZVAL_STRING(&func, func_name);
ZVAL_UNDEF(&retval);
call_user_function(CG(function_table), NULL, &func, &retval, nargs, args);
zend_call_known_function(fn, NULL, NULL, &retval, nargs, args, NULL);

// TODO: check result?
/* to ensure retval is not broken */
php_var_dump(&retval, 0);

/* cleanup */
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func);
}

// Call named PHP function with N string arguments
Expand Down