test/handshake_helper.c:112: error: NULL_DEREFERENCE
  pointer `ex_data` last assigned on line 93 could be null and is dereferenced at line 112, column 9.
Showing all 40 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:2081:1: start of procedure SSL_get_servername()
  2079.    */
  2080.   
  2081. > const char *SSL_get_servername(const SSL *s, const int type)
  2082.   {
  2083.       if (type != TLSEXT_NAMETYPE_host_name)

ssl/ssl_lib.c:2083:9: Taking false branch
  2081.   const char *SSL_get_servername(const SSL *s, const int type)
  2082.   {
  2083.       if (type != TLSEXT_NAMETYPE_host_name)
                  ^
  2084.           return NULL;
  2085.   

ssl/ssl_lib.c:2086:12: Condition is true
  2084.           return NULL;
  2085.   
  2086.       return s->session && !s->tlsext_hostname ?
                     ^
  2087.           s->session->tlsext_hostname : s->tlsext_hostname;
  2088.   }

ssl/ssl_lib.c:2086:27: Condition is true
  2084.           return NULL;
  2085.   
  2086.       return s->session && !s->tlsext_hostname ?
                                    ^
  2087.           s->session->tlsext_hostname : s->tlsext_hostname;
  2088.   }

ssl/ssl_lib.c:2086:12: 
  2084.           return NULL;
  2085.   
  2086. >     return s->session && !s->tlsext_hostname ?
  2087.           s->session->tlsext_hostname : s->tlsext_hostname;
  2088.   }

ssl/ssl_lib.c:2086:5: 
  2084.           return NULL;
  2085.   
  2086. >     return s->session && !s->tlsext_hostname ?
  2087.           s->session->tlsext_hostname : s->tlsext_hostname;
  2088.   }

ssl/ssl_lib.c:2088:1: return from a call to SSL_get_servername
  2086.       return s->session && !s->tlsext_hostname ?
  2087.           s->session->tlsext_hostname : s->tlsext_hostname;
  2088. > }
  2089.   
  2090.   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:3525:1: start of procedure SSL_get_ex_data()
  3523.   }
  3524.   
  3525. > void *SSL_get_ex_data(const SSL *s, int idx)
  3526.   {
  3527.       return (CRYPTO_get_ex_data(&s->ex_data, idx));

ssl/ssl_lib.c:3527:5: 
  3525.   void *SSL_get_ex_data(const SSL *s, int idx)
  3526.   {
  3527. >     return (CRYPTO_get_ex_data(&s->ex_data, idx));
  3528.   }
  3529.   

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

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

crypto/ex_data.c:377:9: 
    375.   {
    376.       if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
    377. >         return NULL;
    378.       return sk_void_value(ad->sk, idx);
    379.   }

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

ssl/ssl_lib.c:3528:1: return from a call to SSL_get_ex_data
  3526.   {
  3527.       return (CRYPTO_get_ex_data(&s->ex_data, idx));
  3528. > }
  3529.   
  3530.   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 true 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:102:9: 
100.   
101.       if (strcmp(servername, "server2") == 0) {
102. >         SSL_CTX *new_ctx = (SSL_CTX*)arg;
103.           SSL_set_SSL_CTX(s, new_ctx);
104.           /*

test/handshake_helper.c:103:9: 
101.       if (strcmp(servername, "server2") == 0) {
102.           SSL_CTX *new_ctx = (SSL_CTX*)arg;
103. >         SSL_set_SSL_CTX(s, new_ctx);
104.           /*
105.            * Copy over all the SSL_CTX options - reasonable behavior

ssl/ssl_lib.c:3377:1: start of procedure SSL_set_SSL_CTX()
  3375.   }
  3376.   
  3377. > SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
  3378.   {
  3379.       CERT *new_cert;

ssl/ssl_lib.c:3380:9: Taking false branch
  3378.   {
  3379.       CERT *new_cert;
  3380.       if (ssl->ctx == ctx)
                  ^
  3381.           return ssl->ctx;
  3382.       if (ctx == NULL)

ssl/ssl_lib.c:3382:9: Taking false branch
  3380.       if (ssl->ctx == ctx)
  3381.           return ssl->ctx;
  3382.       if (ctx == NULL)
                  ^
  3383.           ctx = ssl->initial_ctx;
  3384.       new_cert = ssl_cert_dup(ctx->cert);

ssl/ssl_lib.c:3384:5: Skipping ssl_cert_dup(): empty list of specs
  3382.       if (ctx == NULL)
  3383.           ctx = ssl->initial_ctx;
  3384.       new_cert = ssl_cert_dup(ctx->cert);
              ^
  3385.       if (new_cert == NULL) {
  3386.           return NULL;

ssl/ssl_lib.c:3385:9: Taking true branch
  3383.           ctx = ssl->initial_ctx;
  3384.       new_cert = ssl_cert_dup(ctx->cert);
  3385.       if (new_cert == NULL) {
                  ^
  3386.           return NULL;
  3387.       }

ssl/ssl_lib.c:3386:9: 
  3384.       new_cert = ssl_cert_dup(ctx->cert);
  3385.       if (new_cert == NULL) {
  3386. >         return NULL;
  3387.       }
  3388.       ssl_cert_free(ssl->cert);

ssl/ssl_lib.c:3415:1: return from a call to SSL_set_SSL_CTX
  3413.   
  3414.       return ssl->ctx;
  3415. > }
  3416.   
  3417.   int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)

test/handshake_helper.c:109:9: 
107.            * contexts differ/conflict
108.            */
109. >         SSL_clear_options(s, 0xFFFFFFFFL);
110.           SSL_set_options(s, SSL_CTX_get_options(new_ctx));
111.   

ssl/ssl_lib.c:3881:1: start of procedure SSL_clear_options()
  3879.   }
  3880.   
  3881. > unsigned long SSL_clear_options(SSL *s, unsigned long op)
  3882.   {
  3883.       return s->options &= ~op;

ssl/ssl_lib.c:3883:5: 
  3881.   unsigned long SSL_clear_options(SSL *s, unsigned long op)
  3882.   {
  3883. >     return s->options &= ~op;
  3884.   }
  3885.   

ssl/ssl_lib.c:3884:1: return from a call to SSL_clear_options
  3882.   {
  3883.       return s->options &= ~op;
  3884. > }
  3885.   
  3886.   STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)

test/handshake_helper.c:110:9: 
108.            */
109.           SSL_clear_options(s, 0xFFFFFFFFL);
110. >         SSL_set_options(s, SSL_CTX_get_options(new_ctx));
111.   
112.           ex_data->servername = SSL_TEST_SERVERNAME_SERVER2;

ssl/ssl_lib.c:3856:1: start of procedure SSL_CTX_get_options()
  3854.    * control interface.
  3855.    */
  3856. > unsigned long SSL_CTX_get_options(const SSL_CTX *ctx)
  3857.   {
  3858.       return ctx->options;

ssl/ssl_lib.c:3858:5: 
  3856.   unsigned long SSL_CTX_get_options(const SSL_CTX *ctx)
  3857.   {
  3858. >     return ctx->options;
  3859.   }
  3860.   

ssl/ssl_lib.c:3859:1: return from a call to SSL_CTX_get_options
  3857.   {
  3858.       return ctx->options;
  3859. > }
  3860.   
  3861.   unsigned long SSL_get_options(const SSL *s)

ssl/ssl_lib.c:3871:1: start of procedure SSL_set_options()
  3869.   }
  3870.   
  3871. > unsigned long SSL_set_options(SSL *s, unsigned long op)
  3872.   {
  3873.       return s->options |= op;

ssl/ssl_lib.c:3873:5: 
  3871.   unsigned long SSL_set_options(SSL *s, unsigned long op)
  3872.   {
  3873. >     return s->options |= op;
  3874.   }
  3875.   

ssl/ssl_lib.c:3874:1: return from a call to SSL_set_options
  3872.   {
  3873.       return s->options |= op;
  3874. > }
  3875.   
  3876.   unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op)

test/handshake_helper.c:112:9: 
110.           SSL_set_options(s, SSL_CTX_get_options(new_ctx));
111.   
112. >         ex_data->servername = SSL_TEST_SERVERNAME_SERVER2;
113.           return SSL_TLSEXT_ERR_OK;
114.       } else if (strcmp(servername, "server1") == 0) {
