From: Alexander Monakov <amonakov@ispras.ru>
Date: Sun, 6 Mar 2016 17:22:38 +0000 (+0300)
Subject: env: avoid leaving dangling pointers in __env_map
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=9543656cc32fda48fc463f332ee20e91eed2b768;p=musl

env: avoid leaving dangling pointers in __env_map

This is the minimal fix for __putenv leaving a pointer to freed heap
storage in __env_map array, which could later on lead to errors such
as double-free.
---

diff --git a/src/env/putenv.c b/src/env/putenv.c
index 4042869b..71530426 100644
--- a/src/env/putenv.c
+++ b/src/env/putenv.c
@@ -30,6 +30,7 @@ int __putenv(char *s, int a)
 				}
 			} else {
 				free(__env_map[j]);
+				__env_map[j] = s;
 			}
 		}
 	}