From 90fdc117dd583b9df6119c2a15aee123581a9c9e Mon Sep 17 00:00:00 2001
From: Paul Elliott <paul.elliott@arm.com>
Date: Wed, 22 Sep 2021 17:15:48 +0100
Subject: [PATCH] Make NULL tag check more explicit

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
---
 library/psa_crypto.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 415dab8b2..a954d86c6 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -3760,7 +3760,7 @@ exit:
      * Even if the operation succeeds, make sure we clear the rest of the
      * buffer to prevent potential leakage of anything previously placed in
      * the same buffer.*/
-    if( tag )
+    if( tag != NULL )
     {
         if( status != PSA_SUCCESS )
             memset( tag, '!', tag_size );