test/handshake_helper.c:93: error: NULL_DEREFERENCE
  pointer `ex_data` last assigned on line 85 could be null and is dereferenced at line 93, column 13.
Showing all 12 steps of the trace


test/handshake_helper.c:82:1: start of procedure info_cb()
80.   static int ex_data_idx;
81.   
82. > static void info_cb(const SSL *s, int where, int ret)
83.   {
84.       if (where & SSL_CB_ALERT) {

test/handshake_helper.c:84:9: Taking true branch
82.   static void info_cb(const SSL *s, int where, int ret)
83.   {
84.       if (where & SSL_CB_ALERT) {
              ^
85.           HANDSHAKE_EX_DATA *ex_data =
86.               (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));

test/handshake_helper.c:85:9: 
83.   {
84.       if (where & SSL_CB_ALERT) {
85. >         HANDSHAKE_EX_DATA *ex_data =
86.               (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
87.           if (where & SSL_CB_WRITE) {

ssl/ssl_lib.c:3908:1: start of procedure SSL_get_ex_data()
  3906.   }
  3907.   
  3908. > void *SSL_get_ex_data(const SSL *s, int idx)
  3909.   {
  3910.       return CRYPTO_get_ex_data(&s->ex_data, idx);

ssl/ssl_lib.c:3910:5: 
  3908.   void *SSL_get_ex_data(const SSL *s, int idx)
  3909.   {
  3910. >     return CRYPTO_get_ex_data(&s->ex_data, idx);
  3911.   }
  3912.   

crypto/ex_data.c:393:1: start of procedure CRYPTO_get_ex_data()
    391.    * particular index in the class used by this variable
    392.    */
    393. > void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
    394.   {
    395.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))

crypto/ex_data.c:395:9: Taking true branch
    393.   void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
    394.   {
    395.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
                   ^
    396.           return NULL;
    397.       return sk_void_value(ad->sk, idx);

crypto/ex_data.c:396:9: 
    394.   {
    395.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
    396. >         return NULL;
    397.       return sk_void_value(ad->sk, idx);
    398.   }

crypto/ex_data.c:398:1: return from a call to CRYPTO_get_ex_data
    396.           return NULL;
    397.       return sk_void_value(ad->sk, idx);
    398. > }

ssl/ssl_lib.c:3911:1: return from a call to SSL_get_ex_data
  3909.   {
  3910.       return CRYPTO_get_ex_data(&s->ex_data, idx);
  3911. > }
  3912.   
  3913.   int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)

test/handshake_helper.c:87:13: Taking false branch
85.           HANDSHAKE_EX_DATA *ex_data =
86.               (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
87.           if (where & SSL_CB_WRITE) {
                  ^
88.               ex_data->alert_sent = ret;
89.               if (strcmp(SSL_alert_type_string(ret), "F") == 0

test/handshake_helper.c:93:13: 
91.                   ex_data->num_fatal_alerts_sent++;
92.           } else {
93. >             ex_data->alert_received = ret;
94.           }
95.       }
