From 2d3a21c6c731f0955a9b8e48cca6de57d2c16206 Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Mon, 12 Dec 2022 00:16:51 +0100
Subject: [PATCH] Avoid memcmp() with len=0

---
 test/default/aead_aes256gcm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/default/aead_aes256gcm.c b/test/default/aead_aes256gcm.c
index 51328a32..9c1e43d6 100644
--- a/test/default/aead_aes256gcm.c
+++ b/test/default/aead_aes256gcm.c
@@ -3298,7 +3298,7 @@ tv2(void)
                                           NULL, 0, nonce, key) != 0) {
             printf("Decryption of random ciphertext failed");
         }
-        assert(memcmp(message, message2, message_len) == 0);
+        assert(message_len == 0 || memcmp(message, message2, message_len) == 0);
         sodium_free(key);
         sodium_free(nonce);
         sodium_free(ciphertext);