Check for zero length and NULL buffer pointer.

In reference to issue ARMmbed#49
jainvikas8 · Aug 15, 2019 · 0fc1dfe · 0fc1dfe
1 parent 0ed1df6
commit 0fc1dfe
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/library/platform_util.c b/library/platform_util.c
@@ -72,7 +72,8 @@ static void * (* const volatile memset_func)( void *, int, size_t ) = memset;
 
 void mbedtls_platform_zeroize( void *buf, size_t len )
 {
-    memset_func( buf, 0, len );
+    if ( buf != NULL && len > 0 )
+        memset_func( buf, 0, len );
 }
 #endif /* MBEDTLS_PLATFORM_ZEROIZE_ALT */