test/handshake_helper.c:98: error: NULL_DEREFERENCE
  pointer `ex_data` last assigned on line 95 could be null and is dereferenced at line 98, column 13.
Showing all 12 steps of the trace


test/handshake_helper.c:92:1: start of procedure info_cb()
90.   static int ex_data_idx;
91.   
92. > static void info_cb(const SSL *s, int where, int ret)
93.   {
94.       if (where & SSL_CB_ALERT) {

test/handshake_helper.c:94:9: Taking true branch
92.   static void info_cb(const SSL *s, int where, int ret)
93.   {
94.       if (where & SSL_CB_ALERT) {
              ^
95.           HANDSHAKE_EX_DATA *ex_data =
96.               (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));

test/handshake_helper.c:95:9: 
93.   {
94.       if (where & SSL_CB_ALERT) {
95. >         HANDSHAKE_EX_DATA *ex_data =
96.               (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
97.           if (where & SSL_CB_WRITE) {

ssl/ssl_lib.c:4215:1: start of procedure SSL_get_ex_data()
  4213.   }
  4214.   
  4215. > void *SSL_get_ex_data(const SSL *s, int idx)
  4216.   {
  4217.       return CRYPTO_get_ex_data(&s->ex_data, idx);

ssl/ssl_lib.c:4217:5: 
  4215.   void *SSL_get_ex_data(const SSL *s, int idx)
  4216.   {
  4217. >     return CRYPTO_get_ex_data(&s->ex_data, idx);
  4218.   }
  4219.   

crypto/ex_data.c:458:1: start of procedure CRYPTO_get_ex_data()
    456.    * particular index in the class used by this variable
    457.    */
    458. > void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
    459.   {
    460.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))

crypto/ex_data.c:460:9: Taking true branch
    458.   void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
    459.   {
    460.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
                   ^
    461.           return NULL;
    462.       return sk_void_value(ad->sk, idx);

crypto/ex_data.c:461:9: 
    459.   {
    460.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
    461. >         return NULL;
    462.       return sk_void_value(ad->sk, idx);
    463.   }

crypto/ex_data.c:463:1: return from a call to CRYPTO_get_ex_data
    461.           return NULL;
    462.       return sk_void_value(ad->sk, idx);
    463. > }
    464.   
    465.   OPENSSL_CTX *crypto_ex_data_get_openssl_ctx(const CRYPTO_EX_DATA *ad)

ssl/ssl_lib.c:4218:1: return from a call to SSL_get_ex_data
  4216.   {
  4217.       return CRYPTO_get_ex_data(&s->ex_data, idx);
  4218. > }
  4219.   
  4220.   int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)

test/handshake_helper.c:97:13: Taking true branch
95.           HANDSHAKE_EX_DATA *ex_data =
96.               (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
97.           if (where & SSL_CB_WRITE) {
                   ^
98.               ex_data->alert_sent = ret;
99.               if (strcmp(SSL_alert_type_string(ret), "F") == 0

test/handshake_helper.c:98:13: 
96.               (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
97.           if (where & SSL_CB_WRITE) {
98. >             ex_data->alert_sent = ret;
99.               if (strcmp(SSL_alert_type_string(ret), "F") == 0
100.                   || strcmp(SSL_alert_desc_string(ret), "CN") == 0)

static void info_cb(const SSL *s, int where, int ret)
{
    if (where & SSL_CB_ALERT) {
        HANDSHAKE_EX_DATA *ex_data =
            (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
        if (where & SSL_CB_WRITE) {
            ex_data->alert_sent = ret;
            if (strcmp(SSL_alert_type_string(ret), "F") == 0
                || strcmp(SSL_alert_desc_string(ret), "CN") == 0)
                ex_data->num_fatal_alerts_sent++;
        } else {
            ex_data->alert_received = ret;
        }
    }
}
['static void info_cb(const SSL *s, int where, int ret)\n{\n    if (where & SSL_CB_ALERT) {\n        HANDSHAKE_EX_DATA *ex_data =\n            (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));\n        if (where & SSL_CB_WRITE) {\n            ex_data->alert_sent = ret;\n            if (strcmp(SSL_alert_type_string(ret), "F") == 0\n                || strcmp(SSL_alert_desc_string(ret), "CN") == 0)\n                ex_data->num_fatal_alerts_sent++;\n        } else {\n            ex_data->alert_received = ret;\n        }\n    }\n}', 'void *SSL_get_ex_data(const SSL *s, int idx)\n{\n    return CRYPTO_get_ex_data(&s->ex_data, idx);\n}', 'void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)\n{\n    if (ad->sk == NULL || idx >= sk_void_num(ad->sk))\n        return NULL;\n    return sk_void_value(ad->sk, idx);\n}']