Fix ubsan false positive

Author: iluuu1994

Zend/zend_portability.h

@@ -515,6 +515,12 @@ extern "C++" {
 # undef HAVE_FUNC_ATTRIBUTE_IFUNC
 #endif
 
+#if __has_feature(memory_sanitizer)
+# define MSAN_UNPOISON(value) __msan_unpoison(&(value), sizeof(value))
+#else
+# define MSAN_UNPOISON(value)
+#endif
+
 /* Only use ifunc resolvers if we have __builtin_cpu_supports() and __builtin_cpu_init(),
  * otherwise the use of zend_cpu_supports() may not be safe inside ifunc resolvers. */
 #if defined(HAVE_FUNC_ATTRIBUTE_IFUNC) && defined(HAVE_FUNC_ATTRIBUTE_TARGET) && \

ext/standard/basic_functions.c

@@ -1182,6 +1182,7 @@ PHP_FUNCTION(time_nanosleep)
 		RETURN_TRUE;
 	} else if (errno == EINTR) {
 		array_init(return_value);
+		MSAN_UNPOISON(php_rem);
 		add_assoc_long_ex(return_value, "seconds", sizeof("seconds")-1, php_rem.tv_sec);
 		add_assoc_long_ex(return_value, "nanoseconds", sizeof("nanoseconds")-1, php_rem.tv_nsec);
 		return;