Merge branch 'PHP-7.4'

* PHP-7.4:
  Fix #79078: Hypothetical use-after-free in curl_multi_add_handle()

Author: cmb69

ext/curl/multi.c

@@ -88,6 +88,8 @@ PHP_FUNCTION(curl_multi_add_handle)
 		RETURN_THROWS();
 	}
 
+	_php_curl_verify_handlers(ch, 1);
+
 	_php_curl_cleanup_handle(ch);
 
 	GC_ADDREF(Z_RES_P(z_ch));

ext/curl/tests/bug48203_multi.phpt

@@ -67,23 +67,23 @@ foreach($options_to_check as $option) {
 --CLEAN--
 <?php @unlink(__DIR__ . '/bug48203.tmp'); ?>
 --EXPECTF--
-Warning: curl_multi_exec(): CURLOPT_STDERR resource has gone away, resetting to stderr in %s on line %d
-
-Warning: curl_multi_exec(): CURLOPT_STDERR resource has gone away, resetting to stderr in %s on line %d
+Warning: curl_multi_add_handle(): CURLOPT_STDERR resource has gone away, resetting to stderr in %s on line %d
+%A
+Warning: curl_multi_add_handle(): CURLOPT_STDERR resource has gone away, resetting to stderr in %s on line %d
 %A
 Ok for CURLOPT_STDERR
 
-Warning: curl_multi_exec(): CURLOPT_WRITEHEADER resource has gone away, resetting to default in %s on line %d
+Warning: curl_multi_add_handle(): CURLOPT_WRITEHEADER resource has gone away, resetting to default in %s on line %d
 
-Warning: curl_multi_exec(): CURLOPT_WRITEHEADER resource has gone away, resetting to default in %s on line %d
+Warning: curl_multi_add_handle(): CURLOPT_WRITEHEADER resource has gone away, resetting to default in %s on line %d
 Ok for CURLOPT_WRITEHEADER
 
-Warning: curl_multi_exec(): CURLOPT_FILE resource has gone away, resetting to default in %s on line %d
+Warning: curl_multi_add_handle(): CURLOPT_FILE resource has gone away, resetting to default in %s on line %d
 
-Warning: curl_multi_exec(): CURLOPT_FILE resource has gone away, resetting to default in %s on line %d
+Warning: curl_multi_add_handle(): CURLOPT_FILE resource has gone away, resetting to default in %s on line %d
 %AOk for CURLOPT_FILE
 
-Warning: curl_multi_exec(): CURLOPT_INFILE resource has gone away, resetting to default in %s on line %d
+Warning: curl_multi_add_handle(): CURLOPT_INFILE resource has gone away, resetting to default in %s on line %d
 
-Warning: curl_multi_exec(): CURLOPT_INFILE resource has gone away, resetting to default in %s on line %d
+Warning: curl_multi_add_handle(): CURLOPT_INFILE resource has gone away, resetting to default in %s on line %d
 Ok for CURLOPT_INFILE