test/handshake_helper.c:111: error: NULL_DEREFERENCE
  pointer `ex_data` last assigned on line 107 could be null and is dereferenced at line 111, column 9.
Showing all 19 steps of the trace


test/handshake_helper.c:104:1: start of procedure select_server_ctx()
102.    * An empty SNI extension also returns SSL_TSLEXT_ERR_NOACK.
103.    */
104. > static int select_server_ctx(SSL *s, void *arg, int ignore)
105.   {
106.       const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);

test/handshake_helper.c:106:5: 
104.   static int select_server_ctx(SSL *s, void *arg, int ignore)
105.   {
106. >     const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
107.       HANDSHAKE_EX_DATA *ex_data =
108.           (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));

ssl/ssl_lib.c:2500:1: start of procedure SSL_get_servername()
  2498.    */
  2499.   
  2500. > const char *SSL_get_servername(const SSL *s, const int type)
  2501.   {
  2502.       if (type != TLSEXT_NAMETYPE_host_name)

ssl/ssl_lib.c:2502:9: Taking false branch
  2500.   const char *SSL_get_servername(const SSL *s, const int type)
  2501.   {
  2502.       if (type != TLSEXT_NAMETYPE_host_name)
                  ^
  2503.           return NULL;
  2504.   

ssl/ssl_lib.c:2505:12: Condition is true
  2503.           return NULL;
  2504.   
  2505.       return s->session && !s->ext.hostname ?
                     ^
  2506.           s->session->ext.hostname : s->ext.hostname;
  2507.   }

ssl/ssl_lib.c:2505:27: Condition is true
  2503.           return NULL;
  2504.   
  2505.       return s->session && !s->ext.hostname ?
                                    ^
  2506.           s->session->ext.hostname : s->ext.hostname;
  2507.   }

ssl/ssl_lib.c:2505:12: 
  2503.           return NULL;
  2504.   
  2505. >     return s->session && !s->ext.hostname ?
  2506.           s->session->ext.hostname : s->ext.hostname;
  2507.   }

ssl/ssl_lib.c:2505:5: 
  2503.           return NULL;
  2504.   
  2505. >     return s->session && !s->ext.hostname ?
  2506.           s->session->ext.hostname : s->ext.hostname;
  2507.   }

ssl/ssl_lib.c:2507:1: return from a call to SSL_get_servername
  2505.       return s->session && !s->ext.hostname ?
  2506.           s->session->ext.hostname : s->ext.hostname;
  2507. > }
  2508.   
  2509.   int SSL_get_servername_type(const SSL *s)

test/handshake_helper.c:107:5: 
105.   {
106.       const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
107. >     HANDSHAKE_EX_DATA *ex_data =
108.           (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
109.   

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:110:9: Taking true branch
108.           (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
109.   
110.       if (servername == NULL) {
               ^
111.           ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
112.           return SSL_TLSEXT_ERR_NOACK;

test/handshake_helper.c:111:9: 
109.   
110.       if (servername == NULL) {
111. >         ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
112.           return SSL_TLSEXT_ERR_NOACK;
113.       }

static int select_server_ctx(SSL *s, void *arg, int ignore)
{
    const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
    HANDSHAKE_EX_DATA *ex_data =
        (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
    if (servername == NULL) {
        ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
        return SSL_TLSEXT_ERR_NOACK;
    }
    if (strcmp(servername, "server2") == 0) {
        SSL_CTX *new_ctx = (SSL_CTX*)arg;
        SSL_set_SSL_CTX(s, new_ctx);
        SSL_clear_options(s, 0xFFFFFFFFL);
        SSL_set_options(s, SSL_CTX_get_options(new_ctx));
        ex_data->servername = SSL_TEST_SERVERNAME_SERVER2;
        return SSL_TLSEXT_ERR_OK;
    } else if (strcmp(servername, "server1") == 0) {
        ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
        return SSL_TLSEXT_ERR_OK;
    } else if (ignore) {
        ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
        return SSL_TLSEXT_ERR_NOACK;
    } else {
        return SSL_TLSEXT_ERR_ALERT_FATAL;
    }
}
['static int select_server_ctx(SSL *s, void *arg, int ignore)\n{\n    const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);\n    HANDSHAKE_EX_DATA *ex_data =\n        (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));\n    if (servername == NULL) {\n        ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;\n        return SSL_TLSEXT_ERR_NOACK;\n    }\n    if (strcmp(servername, "server2") == 0) {\n        SSL_CTX *new_ctx = (SSL_CTX*)arg;\n        SSL_set_SSL_CTX(s, new_ctx);\n        SSL_clear_options(s, 0xFFFFFFFFL);\n        SSL_set_options(s, SSL_CTX_get_options(new_ctx));\n        ex_data->servername = SSL_TEST_SERVERNAME_SERVER2;\n        return SSL_TLSEXT_ERR_OK;\n    } else if (strcmp(servername, "server1") == 0) {\n        ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;\n        return SSL_TLSEXT_ERR_OK;\n    } else if (ignore) {\n        ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;\n        return SSL_TLSEXT_ERR_NOACK;\n    } else {\n        return SSL_TLSEXT_ERR_ALERT_FATAL;\n    }\n}', 'const char *SSL_get_servername(const SSL *s, const int type)\n{\n    if (type != TLSEXT_NAMETYPE_host_name)\n        return NULL;\n    return s->session && !s->ext.hostname ?\n        s->session->ext.hostname : s->ext.hostname;\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}']