1 files changed, 3 insertions, 0 deletions

diff --git a/auth-pam.c b/auth-pam.c
index 34326c242..dc4116175 100644
--- a/auth-pam.c
+++ b/auth-pam.c
@@ -648,6 +648,9 @@ free_pam_environment(char **env)
 {
         char **envp;
 
+        if (env == NULL)
+                return;
+
         for (envp = env; *envp; envp++)
                 xfree(*envp);
         xfree(env);