From ad1c828827043fd1048582cee60103a68c8d929a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Klitzing?= <aklitzing@gmail.com>
Date: Fri, 7 Jul 2017 22:41:12 +0200
Subject: [PATCH] unix: check for NULL in uv_os_unsetenv for parameter name
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Fixes segfault of unit test on musl (AlpineLinux).
Add a check for parameter like uv_os_setenv do.

PR-URL: https://github.com/libuv/libuv/pull/1409
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
---
 src/unix/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/unix/core.c b/src/unix/core.c
index 4c744925..a0513451 100644
--- a/src/unix/core.c
+++ b/src/unix/core.c
@@ -1292,6 +1292,9 @@ int uv_os_setenv(const char* name, const char* value) {
 
 
 int uv_os_unsetenv(const char* name) {
+  if (name == NULL)
+    return -EINVAL;
+
   if (unsetenv(name) != 0)
     return -errno;