Fix potential segfault condition in RC4_FREE

diff --git a/src/crypto.c b/src/crypto.c
index dd33b342942fc50303af3e31278f80d952cfb9e9..aabd3994a7afd83ff8d9b4867f21e24a2467270d 100644 (file)
--- a/src/crypto.c
+++ b/src/crypto.c
@@ -209,7 +209,7 @@ int RC4_UPDATE(struct ntlm_rc4_handle *handle,
 
 void RC4_FREE(struct ntlm_rc4_handle **handle)
 {
-    if (!handle) return;
+    if (!handle || !*handle) return;
     EVP_CIPHER_CTX_cleanup(&(*handle)->ctx);
     safefree(*handle);
 }