Correctly initialise PACKET to zero in the tests to avoid possible problems

with padding bytes.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8611)

test/clienthellotest.c

@@ -58,7 +58,7 @@ static int test_client_hello(int currtest)
     BIO *wbio;
     long len;
     unsigned char *data;
-    PACKET pkt = {0}, pkt2 = {0}, pkt3 = {0};
+    PACKET pkt, pkt2, pkt3;
     char *dummytick = "Hello World!";
     unsigned int type = 0;
     int testresult = 0;
@@ -71,6 +71,10 @@ static int test_client_hello(int currtest)
         return 1;
 #endif
 
+    memset(&pkt, 0, sizeof(pkt));
+    memset(&pkt2, 0, sizeof(pkt2));
+    memset(&pkt3, 0, sizeof(pkt3));
+
     /*
      * For each test set up an SSL_CTX and SSL and see what ClientHello gets
      * produced when we try to connect

test/packettest.c

@@ -350,8 +350,9 @@ static int test_PACKET_get_length_prefixed_1(void)
     unsigned char buf1[BUF_LEN];
     const size_t len = 16;
     unsigned int i;
-    PACKET pkt, short_pkt, subpkt = {0};
+    PACKET pkt, short_pkt, subpkt;
 
+    memset(&subpkt, 0, sizeof(subpkt));
     buf1[0] = (unsigned char)len;
     for (i = 1; i < BUF_LEN; i++)
         buf1[i] = (i * 2) & 0xff;
@@ -374,8 +375,9 @@ static int test_PACKET_get_length_prefixed_2(void)
     unsigned char buf1[1024];
     const size_t len = 516;  /* 0x0204 */
     unsigned int i;
-    PACKET pkt, short_pkt, subpkt = {0};
+    PACKET pkt, short_pkt, subpkt;
 
+    memset(&subpkt, 0, sizeof(subpkt));
     for (i = 1; i <= 1024; i++)
         buf1[i - 1] = (i * 2) & 0xff;
 
@@ -397,8 +399,9 @@ static int test_PACKET_get_length_prefixed_3(void)
     unsigned char buf1[1024];
     const size_t len = 516;  /* 0x000204 */
     unsigned int i;
-    PACKET pkt, short_pkt, subpkt = {0};
+    PACKET pkt, short_pkt, subpkt;
 
+    memset(&subpkt, 0, sizeof(subpkt));
     for (i = 0; i < 1024; i++)
         buf1[i] = (i * 2) & 0xff;
 
@@ -420,8 +423,9 @@ static int test_PACKET_as_length_prefixed_1(void)
     unsigned char buf1[BUF_LEN];
     const size_t len = 16;
     unsigned int i;
-    PACKET pkt, exact_pkt, subpkt = {0};
+    PACKET pkt, exact_pkt, subpkt;
 
+    memset(&subpkt, 0, sizeof(subpkt));
     buf1[0] = (unsigned char)len;
     for (i = 1; i < BUF_LEN; i++)
         buf1[i] = (i * 2) & 0xff;
@@ -443,8 +447,9 @@ static int test_PACKET_as_length_prefixed_2(void)
     unsigned char buf[1024];
     const size_t len = 516;  /* 0x0204 */
     unsigned int i;
-    PACKET pkt, exact_pkt, subpkt = {0};
+    PACKET pkt, exact_pkt, subpkt;
 
+    memset(&subpkt, 0, sizeof(subpkt));
     for (i = 1; i <= 1024; i++)
         buf[i-1] = (i * 2) & 0xff;
 

test/servername_test.c

@@ -35,10 +35,16 @@ static int get_sni_from_client_hello(BIO *bio, char **sni)
 {
     long len;
     unsigned char *data;
-    PACKET pkt = {0}, pkt2 = {0}, pkt3 = {0}, pkt4 = {0}, pkt5 = {0};
+    PACKET pkt, pkt2, pkt3, pkt4, pkt5;
     unsigned int servname_type = 0, type = 0;
     int ret = 0;
 
+    memset(&pkt, 0, sizeof(pkt));
+    memset(&pkt2, 0, sizeof(pkt2));
+    memset(&pkt3, 0, sizeof(pkt3));
+    memset(&pkt4, 0, sizeof(pkt4));
+    memset(&pkt5, 0, sizeof(pkt5));
+
     len = BIO_get_mem_data(bio, (char **)&data);
     if (!TEST_true(PACKET_buf_init(&pkt, data, len))
                /* Skip the record header */

test/sslapitest.c

@@ -4595,12 +4595,16 @@ static int get_MFL_from_client_hello(BIO *bio, int *mfl_codemfl_code)
 {
     long len;
     unsigned char *data;
-    PACKET pkt = {0}, pkt2 = {0}, pkt3 = {0};
+    PACKET pkt, pkt2, pkt3;
     unsigned int MFL_code = 0, type = 0;
 
     if (!TEST_uint_gt( len = BIO_get_mem_data( bio, (char **) &data ), 0 ) )
         goto end;
 
+    memset(&pkt, 0, sizeof(pkt));
+    memset(&pkt2, 0, sizeof(pkt2));
+    memset(&pkt3, 0, sizeof(pkt3));
+
     if (!TEST_true( PACKET_buf_init( &pkt, data, len ) )
                /* Skip the record header */
             || !PACKET_forward(&pkt, SSL3_RT_HEADER_LENGTH)