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Scope reduction to enable NULL check to protect dereferencing.

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Signed-off-by: sander-visser <github@visser.se>
This commit is contained in:
sander-visser 2020-05-06 22:05:13 +02:00
parent 5435451a1a
commit b8aa2071f6
1 changed files with 12 additions and 8 deletions
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20
library/ssl_tls.c
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@ -6661,14 +6661,6 @@ int mbedtls_ssl_context_load( mbedtls_ssl_context *context,
*/ */
void mbedtls_ssl_free( mbedtls_ssl_context *ssl ) void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
{ {
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t in_buf_len = ssl->in_buf_len;
size_t out_buf_len = ssl->out_buf_len;
#else
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
#endif
if( ssl == NULL ) if( ssl == NULL )
return; return;
@ -6676,6 +6668,12 @@ void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
if( ssl->out_buf != NULL ) if( ssl->out_buf != NULL )
{ {
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t out_buf_len = ssl->out_buf_len;
#else
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
#endif
mbedtls_platform_zeroize( ssl->out_buf, out_buf_len ); mbedtls_platform_zeroize( ssl->out_buf, out_buf_len );
mbedtls_free( ssl->out_buf ); mbedtls_free( ssl->out_buf );
ssl->out_buf = NULL; ssl->out_buf = NULL;
@ -6683,6 +6681,12 @@ void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
if( ssl->in_buf != NULL ) if( ssl->in_buf != NULL )
{ {
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t in_buf_len = ssl->in_buf_len;
#else
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
#endif
mbedtls_platform_zeroize( ssl->in_buf, in_buf_len ); mbedtls_platform_zeroize( ssl->in_buf, in_buf_len );
mbedtls_free( ssl->in_buf ); mbedtls_free( ssl->in_buf );
ssl->in_buf = NULL; ssl->in_buf = NULL;