Addition to [731644]: also use the lock when using the getaddrinfo
emulation (ie. when HAVE_GETADDRINFO isn't defined).
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index e7e3c47..4447f09 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -141,9 +141,9 @@
#endif
/* On systems on which getaddrinfo() is believed to not be thread-safe,
- protect access with a lock. */
+ (this includes the getaddrinfo emulation) protect access with a lock. */
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || \
- defined(__NetBSD__)
+ defined(__NetBSD__) || !defined(HAVE_GETADDRINFO)
#define USE_GETADDRINFO_LOCK
#endif