crypto/rand/rand_lib.c:741: error: NULL_DEREFERENCE
  pointer `meth` last assigned on line 739 could be null and is dereferenced at line 741, column 9.
Showing all 14 steps of the trace


crypto/rand/rand_lib.c:737:1: start of procedure RAND_add()
735.   }
736.   
737. > void RAND_add(const void *buf, int num, double randomness)
738.   {
739.       const RAND_METHOD *meth = RAND_get_rand_method();

crypto/rand/rand_lib.c:739:5: 
737.   void RAND_add(const void *buf, int num, double randomness)
738.   {
739. >     const RAND_METHOD *meth = RAND_get_rand_method();
740.   
741.       if (meth->add != NULL)

crypto/rand/rand_lib.c:673:1: start of procedure RAND_get_rand_method()
  671.   }
  672.   
  673. > const RAND_METHOD *RAND_get_rand_method(void)
  674.   {
  675.       const RAND_METHOD *tmp_meth = NULL;

crypto/rand/rand_lib.c:675:5: 
  673.   const RAND_METHOD *RAND_get_rand_method(void)
  674.   {
  675. >     const RAND_METHOD *tmp_meth = NULL;
  676.   
  677.       if (!RUN_ONCE(&rand_init, do_rand_init))

crypto/rand/rand_lib.c:677:10: 
  675.       const RAND_METHOD *tmp_meth = NULL;
  676.   
  677. >     if (!RUN_ONCE(&rand_init, do_rand_init))
  678.           return NULL;
  679.   

crypto/threads_pthread.c:111:1: start of procedure CRYPTO_THREAD_run_once()
    109.   }
    110.   
    111. > int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
    112.   {
    113.       if (pthread_once(once, init) != 0)

crypto/threads_pthread.c:113:9: Taking true branch
    111.   int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
    112.   {
    113.       if (pthread_once(once, init) != 0)
                   ^
    114.           return 0;
    115.   

crypto/threads_pthread.c:114:9: 
    112.   {
    113.       if (pthread_once(once, init) != 0)
    114. >         return 0;
    115.   
    116.       return 1;

crypto/threads_pthread.c:117:1: return from a call to CRYPTO_THREAD_run_once
    115.   
    116.       return 1;
    117. > }
    118.   
    119.   int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))

crypto/rand/rand_lib.c:677:10: Condition is false
  675.       const RAND_METHOD *tmp_meth = NULL;
  676.   
  677.       if (!RUN_ONCE(&rand_init, do_rand_init))
                  ^
  678.           return NULL;
  679.   

crypto/rand/rand_lib.c:677:10: Taking true branch
  675.       const RAND_METHOD *tmp_meth = NULL;
  676.   
  677.       if (!RUN_ONCE(&rand_init, do_rand_init))
                  ^
  678.           return NULL;
  679.   

crypto/rand/rand_lib.c:678:9: 
  676.   
  677.       if (!RUN_ONCE(&rand_init, do_rand_init))
  678. >         return NULL;
  679.   
  680.       CRYPTO_THREAD_write_lock(rand_meth_lock);

crypto/rand/rand_lib.c:701:1: return from a call to RAND_get_rand_method
  699.       CRYPTO_THREAD_unlock(rand_meth_lock);
  700.       return tmp_meth;
  701. > }
  702.   
  703.   #ifndef OPENSSL_NO_ENGINE

crypto/rand/rand_lib.c:741:9: 
739.       const RAND_METHOD *meth = RAND_get_rand_method();
740.   
741. >     if (meth->add != NULL)
742.           meth->add(buf, num, randomness);
743.   }

void RAND_add(const void *buf, int num, double randomness)
{
    const RAND_METHOD *meth = RAND_get_rand_method();
    if (meth->add != NULL)
        meth->add(buf, num, randomness);
}
['void RAND_add(const void *buf, int num, double randomness)\n{\n    const RAND_METHOD *meth = RAND_get_rand_method();\n    if (meth->add != NULL)\n        meth->add(buf, num, randomness);\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}']