From: Simon Ruderich <simon@ruderich.org>
Date: Thu, 1 Feb 2018 20:40:02 +0000 (+0100)
Subject: Prevent crash in execve() if env is NULL
X-Git-Url: https://ruderich.org/simon/gitweb/?a=commitdiff_plain;p=coloredstderr%2Fcoloredstderr.git

Prevent crash in execve() if env is NULL
---

diff --git a/src/coloredstderr.c b/src/coloredstderr.c
index d270071..9161fc3 100644
--- a/src/coloredstderr.c
+++ b/src/coloredstderr.c
@@ -554,6 +554,11 @@ pid_t vfork(void) {
 HOOK_FUNC_DEF3(int, execve, char const *, filename, char * const *, argv, char * const *, env) {
     DLSYM_FUNCTION(real_execve, "execve");
 
+    char * const fake_env[] = {NULL};
+    if (env == NULL) {
+        env = fake_env;
+    }
+
     /* Count environment variables. */
     size_t count = 0;
     char * const *x = env;