From 369f495afc4403abcd0ba9c372e0a64f456d0d17 Mon Sep 17 00:00:00 2001 From: Dave Rodgman Date: Tue, 1 Nov 2022 16:08:14 +0000 Subject: [PATCH] Fix zeroization at NULL pointer Signed-off-by: Dave Rodgman --- library/ssl_tls.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/library/ssl_tls.c b/library/ssl_tls.c index 7a4d43791..c752d59d0 100644 --- a/library/ssl_tls.c +++ b/library/ssl_tls.c @@ -760,7 +760,9 @@ static int tls_prf_generic( mbedtls_md_type_t md_type, exit: mbedtls_md_free( &md_ctx ); - mbedtls_platform_zeroize( tmp, tmp_len ); + if ( tmp != NULL ) + mbedtls_platform_zeroize( tmp, tmp_len ); + mbedtls_platform_zeroize( h_i, sizeof( h_i ) ); mbedtls_free( tmp );