crypto/rand/rand_lib.c:782: error: NULL_DEREFERENCE
  pointer `meth` last assigned on line 780 could be null and is dereferenced at line 782, column 9.
Showing all 14 steps of the trace


crypto/rand/rand_lib.c:778:1: start of procedure RAND_bytes()
776.   }
777.   
778. > int RAND_bytes(unsigned char *buf, int num)
779.   {
780.       const RAND_METHOD *meth = RAND_get_rand_method();

crypto/rand/rand_lib.c:780:5: 
778.   int RAND_bytes(unsigned char *buf, int num)
779.   {
780. >     const RAND_METHOD *meth = RAND_get_rand_method();
781.   
782.       if (meth->bytes != NULL)

crypto/rand/rand_lib.c:681:1: start of procedure RAND_get_rand_method()
  679.   }
  680.   
  681. > const RAND_METHOD *RAND_get_rand_method(void)
  682.   {
  683.       const RAND_METHOD *tmp_meth = NULL;

crypto/rand/rand_lib.c:683:5: 
  681.   const RAND_METHOD *RAND_get_rand_method(void)
  682.   {
  683. >     const RAND_METHOD *tmp_meth = NULL;
  684.   
  685.       if (!RUN_ONCE(&rand_init, do_rand_init))

crypto/rand/rand_lib.c:685:10: 
  683.       const RAND_METHOD *tmp_meth = NULL;
  684.   
  685. >     if (!RUN_ONCE(&rand_init, do_rand_init))
  686.           return NULL;
  687.   

crypto/threads_pthread.c:105:1: start of procedure CRYPTO_THREAD_run_once()
    103.   }
    104.   
    105. > int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
    106.   {
    107.       if (pthread_once(once, init) != 0)

crypto/threads_pthread.c:107:9: Taking true branch
    105.   int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
    106.   {
    107.       if (pthread_once(once, init) != 0)
                   ^
    108.           return 0;
    109.   

crypto/threads_pthread.c:108:9: 
    106.   {
    107.       if (pthread_once(once, init) != 0)
    108. >         return 0;
    109.   
    110.       return 1;

crypto/threads_pthread.c:111:1: return from a call to CRYPTO_THREAD_run_once
    109.   
    110.       return 1;
    111. > }
    112.   
    113.   int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))

crypto/rand/rand_lib.c:685:10: Condition is false
  683.       const RAND_METHOD *tmp_meth = NULL;
  684.   
  685.       if (!RUN_ONCE(&rand_init, do_rand_init))
                  ^
  686.           return NULL;
  687.   

crypto/rand/rand_lib.c:685:10: Taking true branch
  683.       const RAND_METHOD *tmp_meth = NULL;
  684.   
  685.       if (!RUN_ONCE(&rand_init, do_rand_init))
                  ^
  686.           return NULL;
  687.   

crypto/rand/rand_lib.c:686:9: 
  684.   
  685.       if (!RUN_ONCE(&rand_init, do_rand_init))
  686. >         return NULL;
  687.   
  688.       CRYPTO_THREAD_write_lock(rand_meth_lock);

crypto/rand/rand_lib.c:709:1: return from a call to RAND_get_rand_method
  707.       CRYPTO_THREAD_unlock(rand_meth_lock);
  708.       return tmp_meth;
  709. > }
  710.   
  711.   #ifndef OPENSSL_NO_ENGINE

crypto/rand/rand_lib.c:782:9: 
780.       const RAND_METHOD *meth = RAND_get_rand_method();
781.   
782. >     if (meth->bytes != NULL)
783.           return meth->bytes(buf, num);
784.       RANDerr(RAND_F_RAND_BYTES, RAND_R_FUNC_NOT_IMPLEMENTED);

int RAND_bytes(unsigned char *buf, int num)
{
    const RAND_METHOD *meth = RAND_get_rand_method();
    if (meth->bytes != NULL)
        return meth->bytes(buf, num);
    RANDerr(RAND_F_RAND_BYTES, RAND_R_FUNC_NOT_IMPLEMENTED);
    return -1;
}
['int RAND_bytes(unsigned char *buf, int num)\n{\n    const RAND_METHOD *meth = RAND_get_rand_method();\n    if (meth->bytes != NULL)\n        return meth->bytes(buf, num);\n    RANDerr(RAND_F_RAND_BYTES, RAND_R_FUNC_NOT_IMPLEMENTED);\n    return -1;\n}', 'const RAND_METHOD *RAND_get_rand_method(void)\n{\n    const RAND_METHOD *tmp_meth = NULL;\n    if (!RUN_ONCE(&rand_init, do_rand_init))\n        return NULL;\n    CRYPTO_THREAD_write_lock(rand_meth_lock);\n    if (default_RAND_meth == NULL) {\n#ifndef OPENSSL_NO_ENGINE\n        ENGINE *e;\n        if ((e = ENGINE_get_default_RAND()) != NULL\n                && (tmp_meth = ENGINE_get_RAND(e)) != NULL) {\n            funct_ref = e;\n            default_RAND_meth = tmp_meth;\n        } else {\n            ENGINE_finish(e);\n            default_RAND_meth = &rand_meth;\n        }\n#else\n        default_RAND_meth = &rand_meth;\n#endif\n    }\n    tmp_meth = default_RAND_meth;\n    CRYPTO_THREAD_unlock(rand_meth_lock);\n    return tmp_meth;\n}', 'int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))\n{\n    if (pthread_once(once, init) != 0)\n        return 0;\n    return 1;\n}']