test/handshake_helper.c:190: error: NULL_DEREFERENCE
  pointer `ex_data` last assigned on line 142 could be null and is dereferenced at line 190, column 9.
Showing all 29 steps of the trace


test/handshake_helper.c:137:1: start of procedure early_select_server_ctx()
135.   }
136.   
137. > static int early_select_server_ctx(SSL *s, void *arg, int ignore)
138.   {
139.       const char *servername;

test/handshake_helper.c:142:5: 
140.       const unsigned char *p;
141.       size_t len, remaining;
142. >     HANDSHAKE_EX_DATA *ex_data =
143.           (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
144.   

ssl/ssl_lib.c:3729:1: start of procedure SSL_get_ex_data()
  3727.   }
  3728.   
  3729. > void *SSL_get_ex_data(const SSL *s, int idx)
  3730.   {
  3731.       return (CRYPTO_get_ex_data(&s->ex_data, idx));

ssl/ssl_lib.c:3731:5: 
  3729.   void *SSL_get_ex_data(const SSL *s, int idx)
  3730.   {
  3731. >     return (CRYPTO_get_ex_data(&s->ex_data, idx));
  3732.   }
  3733.   

crypto/ex_data.c:387:1: start of procedure CRYPTO_get_ex_data()
    385.    * particular index in the class used by this variable
    386.    */
    387. > void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
    388.   {
    389.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))

crypto/ex_data.c:389:9: Taking true branch
    387.   void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
    388.   {
    389.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
                   ^
    390.           return NULL;
    391.       return sk_void_value(ad->sk, idx);

crypto/ex_data.c:390:9: 
    388.   {
    389.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
    390. >         return NULL;
    391.       return sk_void_value(ad->sk, idx);
    392.   }

crypto/ex_data.c:392:1: return from a call to CRYPTO_get_ex_data
    390.           return NULL;
    391.       return sk_void_value(ad->sk, idx);
    392. > }

ssl/ssl_lib.c:3732:1: return from a call to SSL_get_ex_data
  3730.   {
  3731.       return (CRYPTO_get_ex_data(&s->ex_data, idx));
  3732. > }
  3733.   
  3734.   int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)

test/handshake_helper.c:149:10: Taking false branch
147.        * was written, so parsing the normal case is a bit complex.
148.        */
149.       if (!SSL_early_get0_ext(s, TLSEXT_TYPE_server_name, &p, &remaining) ||
                ^
150.           remaining <= 2)
151.           return 0;

test/handshake_helper.c:150:9: Taking false branch
148.        */
149.       if (!SSL_early_get0_ext(s, TLSEXT_TYPE_server_name, &p, &remaining) ||
150.           remaining <= 2)
               ^
151.           return 0;
152.       /* Extract the length of the supplied list of names. */

test/handshake_helper.c:153:5: 
151.           return 0;
152.       /* Extract the length of the supplied list of names. */
153. >     len = (*(p++) << 1);
154.       len += *(p++);
155.       if (len + 2 != remaining)

test/handshake_helper.c:154:5: 
152.       /* Extract the length of the supplied list of names. */
153.       len = (*(p++) << 1);
154. >     len += *(p++);
155.       if (len + 2 != remaining)
156.           return 0;

test/handshake_helper.c:155:9: Taking false branch
153.       len = (*(p++) << 1);
154.       len += *(p++);
155.       if (len + 2 != remaining)
               ^
156.           return 0;
157.       remaining = len;

test/handshake_helper.c:157:5: 
155.       if (len + 2 != remaining)
156.           return 0;
157. >     remaining = len;
158.       /*
159.        * The list in practice only has a single element, so we only consider

test/handshake_helper.c:162:9: Taking false branch
160.        * the first one.
161.        */
162.       if (remaining == 0 || *p++ != TLSEXT_NAMETYPE_host_name)
               ^
163.           return 0;
164.       remaining--;

test/handshake_helper.c:162:27: Taking false branch
160.        * the first one.
161.        */
162.       if (remaining == 0 || *p++ != TLSEXT_NAMETYPE_host_name)
                                 ^
163.           return 0;
164.       remaining--;

test/handshake_helper.c:164:5: 
162.       if (remaining == 0 || *p++ != TLSEXT_NAMETYPE_host_name)
163.           return 0;
164. >     remaining--;
165.       /* Now we can finally pull out the byte array with the actual hostname. */
166.       if (remaining <= 2)

test/handshake_helper.c:166:9: Taking false branch
164.       remaining--;
165.       /* Now we can finally pull out the byte array with the actual hostname. */
166.       if (remaining <= 2)
               ^
167.           return 0;
168.       len = (*(p++) << 1);

test/handshake_helper.c:168:5: 
166.       if (remaining <= 2)
167.           return 0;
168. >     len = (*(p++) << 1);
169.       len += *(p++);
170.       if (len + 2 > remaining)

test/handshake_helper.c:169:5: 
167.           return 0;
168.       len = (*(p++) << 1);
169. >     len += *(p++);
170.       if (len + 2 > remaining)
171.           return 0;

test/handshake_helper.c:170:9: Taking false branch
168.       len = (*(p++) << 1);
169.       len += *(p++);
170.       if (len + 2 > remaining)
               ^
171.           return 0;
172.       remaining = len;

test/handshake_helper.c:172:5: 
170.       if (len + 2 > remaining)
171.           return 0;
172. >     remaining = len;
173.       servername = (const char *)p;
174.   

test/handshake_helper.c:173:5: 
171.           return 0;
172.       remaining = len;
173. >     servername = (const char *)p;
174.   
175.       if (len == strlen("server2") && strncmp(servername, "server2", len) == 0) {

test/handshake_helper.c:175:9: Taking true branch
173.       servername = (const char *)p;
174.   
175.       if (len == strlen("server2") && strncmp(servername, "server2", len) == 0) {
               ^
176.           SSL_CTX *new_ctx = arg;
177.           SSL_set_SSL_CTX(s, new_ctx);

test/handshake_helper.c:175:37: Taking false branch
173.       servername = (const char *)p;
174.   
175.       if (len == strlen("server2") && strncmp(servername, "server2", len) == 0) {
                                           ^
176.           SSL_CTX *new_ctx = arg;
177.           SSL_set_SSL_CTX(s, new_ctx);

test/handshake_helper.c:188:16: Taking true branch
186.           ex_data->servername = SSL_TEST_SERVERNAME_SERVER2;
187.           return 1;
188.       } else if (len == strlen("server1") &&
                      ^
189.                  strncmp(servername, "server1", len) == 0) {
190.           ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;

test/handshake_helper.c:189:16: Taking true branch
187.           return 1;
188.       } else if (len == strlen("server1") &&
189.                  strncmp(servername, "server1", len) == 0) {
                      ^
190.           ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
191.           return 1;

test/handshake_helper.c:190:9: 
188.       } else if (len == strlen("server1") &&
189.                  strncmp(servername, "server1", len) == 0) {
190. >         ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
191.           return 1;
192.       } else if (ignore) {
