test/handshake_helper.c:115: error: NULL_DEREFERENCE
  pointer `ex_data` last assigned on line 93 could be null and is dereferenced at line 115, column 9.
Showing all 21 steps of the trace


test/handshake_helper.c:90:1: start of procedure select_server_ctx()
88.    * An empty SNI extension also returns SSL_TSLEXT_ERR_NOACK.
89.    */
90. > static int select_server_ctx(SSL *s, void *arg, int ignore)
91.   {
92.       const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);

test/handshake_helper.c:92:5: 
90.   static int select_server_ctx(SSL *s, void *arg, int ignore)
91.   {
92. >     const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
93.       HANDSHAKE_EX_DATA *ex_data =
94.           (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));

ssl/ssl_lib.c:2163:1: start of procedure SSL_get_servername()
  2161.    */
  2162.   
  2163. > const char *SSL_get_servername(const SSL *s, const int type)
  2164.   {
  2165.       if (type != TLSEXT_NAMETYPE_host_name)

ssl/ssl_lib.c:2165:9: Taking false branch
  2163.   const char *SSL_get_servername(const SSL *s, const int type)
  2164.   {
  2165.       if (type != TLSEXT_NAMETYPE_host_name)
                  ^
  2166.           return NULL;
  2167.   

ssl/ssl_lib.c:2168:12: Condition is true
  2166.           return NULL;
  2167.   
  2168.       return s->session && !s->ext.hostname ?
                     ^
  2169.           s->session->ext.hostname : s->ext.hostname;
  2170.   }

ssl/ssl_lib.c:2168:27: Condition is true
  2166.           return NULL;
  2167.   
  2168.       return s->session && !s->ext.hostname ?
                                    ^
  2169.           s->session->ext.hostname : s->ext.hostname;
  2170.   }

ssl/ssl_lib.c:2168:12: 
  2166.           return NULL;
  2167.   
  2168. >     return s->session && !s->ext.hostname ?
  2169.           s->session->ext.hostname : s->ext.hostname;
  2170.   }

ssl/ssl_lib.c:2168:5: 
  2166.           return NULL;
  2167.   
  2168. >     return s->session && !s->ext.hostname ?
  2169.           s->session->ext.hostname : s->ext.hostname;
  2170.   }

ssl/ssl_lib.c:2170:1: return from a call to SSL_get_servername
  2168.       return s->session && !s->ext.hostname ?
  2169.           s->session->ext.hostname : s->ext.hostname;
  2170. > }
  2171.   
  2172.   int SSL_get_servername_type(const SSL *s)

test/handshake_helper.c:93:5: 
91.   {
92.       const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
93. >     HANDSHAKE_EX_DATA *ex_data =
94.           (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
95.   

ssl/ssl_lib.c:3604:1: start of procedure SSL_get_ex_data()
  3602.   }
  3603.   
  3604. > void *SSL_get_ex_data(const SSL *s, int idx)
  3605.   {
  3606.       return (CRYPTO_get_ex_data(&s->ex_data, idx));

ssl/ssl_lib.c:3606:5: 
  3604.   void *SSL_get_ex_data(const SSL *s, int idx)
  3605.   {
  3606. >     return (CRYPTO_get_ex_data(&s->ex_data, idx));
  3607.   }
  3608.   

crypto/ex_data.c:375:1: start of procedure CRYPTO_get_ex_data()
    373.    * particular index in the class used by this variable
    374.    */
    375. > void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
    376.   {
    377.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))

crypto/ex_data.c:377:9: Taking true branch
    375.   void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
    376.   {
    377.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
                   ^
    378.           return NULL;
    379.       return sk_void_value(ad->sk, idx);

crypto/ex_data.c:378:9: 
    376.   {
    377.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
    378. >         return NULL;
    379.       return sk_void_value(ad->sk, idx);
    380.   }

crypto/ex_data.c:380:1: return from a call to CRYPTO_get_ex_data
    378.           return NULL;
    379.       return sk_void_value(ad->sk, idx);
    380. > }

ssl/ssl_lib.c:3607:1: return from a call to SSL_get_ex_data
  3605.   {
  3606.       return (CRYPTO_get_ex_data(&s->ex_data, idx));
  3607. > }
  3608.   
  3609.   int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)

test/handshake_helper.c:96:9: Taking false branch
94.           (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
95.   
96.       if (servername == NULL) {
              ^
97.           ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
98.           return SSL_TLSEXT_ERR_NOACK;

test/handshake_helper.c:101:9: Taking false branch
99.       }
100.   
101.       if (strcmp(servername, "server2") == 0) {
               ^
102.           SSL_CTX *new_ctx = (SSL_CTX*)arg;
103.           SSL_set_SSL_CTX(s, new_ctx);

test/handshake_helper.c:114:16: Taking true branch
112.           ex_data->servername = SSL_TEST_SERVERNAME_SERVER2;
113.           return SSL_TLSEXT_ERR_OK;
114.       } else if (strcmp(servername, "server1") == 0) {
                      ^
115.           ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
116.           return SSL_TLSEXT_ERR_OK;

test/handshake_helper.c:115:9: 
113.           return SSL_TLSEXT_ERR_OK;
114.       } else if (strcmp(servername, "server1") == 0) {
115. >         ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
116.           return SSL_TLSEXT_ERR_OK;
117.       } else if (ignore) {

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}']