Backported bug #71144 (Segmentation fault when using cURL with ZTS)

Author: Julien Pauli

ext/curl/interface.c

@@ -1925,7 +1925,9 @@ static void _php_curl_set_default_options(php_curl *ch)
 	curl_easy_setopt(ch->cp, CURLOPT_INFILE,            (void *) ch);
 	curl_easy_setopt(ch->cp, CURLOPT_HEADERFUNCTION,    curl_write_header);
 	curl_easy_setopt(ch->cp, CURLOPT_WRITEHEADER,       (void *) ch);
+#if !defined(ZTS)
 	curl_easy_setopt(ch->cp, CURLOPT_DNS_USE_GLOBAL_CACHE, 1);
+#endif
 	curl_easy_setopt(ch->cp, CURLOPT_DNS_CACHE_TIMEOUT, 120);
 	curl_easy_setopt(ch->cp, CURLOPT_MAXREDIRS, 20); /* prevent infinite redirects */
 
@@ -2263,7 +2265,14 @@ static int _php_curl_setopt(php_curl *ch, long option, zval **zvalue TSRMLS_DC)
 					return 1;
 			}
 #endif
+# if defined(ZTS)
+			if (option == CURLOPT_DNS_USE_GLOBAL_CACHE) {
+				php_error_docref(NULL TSRMLS_CC, E_WARNING, "CURLOPT_DNS_USE_GLOBAL_CACHE cannot be activated when thread safety is enabled");
+				return 1;
+			}
+# endif
 			error = curl_easy_setopt(ch->cp, option, Z_LVAL_PP(zvalue));
+
 			break;
 		case CURLOPT_SAFE_UPLOAD:
 			convert_to_long_ex(zvalue);

ext/curl/tests/bug71144.phpt

@@ -0,0 +1,13 @@
+--TEST--
+Bug #71144 (Sementation fault when using cURL with ZTS)
+--SKIPIF--
+<?php include 'skipif.inc'; ?>
+<?php if (!PHP_ZTS) { print "skip only for zts build"; } ?>
+--FILE--
+<?php
+$ch = curl_init();
+var_dump(curl_setopt($ch, CURLOPT_DNS_USE_GLOBAL_CACHE, 1));
+?>
+--EXPECTF--
+Warning: curl_setopt(): CURLOPT_DNS_USE_GLOBAL_CACHE cannot be activated when thread safety is enabled in %sbug71144.php on line %d
+bool(false)