crypto/dsa/dsa_asn1.c:71: error: NULL_DEREFERENCE
  pointer `sig` last assigned on line 70 could be null and is dereferenced at line 71, column 3.
Showing all 17 steps of the trace


crypto/dsa/dsa_asn1.c:66:1: start of procedure sig_cb()
64.   
65.   /* Override the default new methods */
66. > static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
67.   {
68.   	if(operation == ASN1_OP_NEW_PRE) {

crypto/dsa/dsa_asn1.c:68:5: Taking true branch
66.   static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
67.   {
68.   	if(operation == ASN1_OP_NEW_PRE) {
          ^
69.   		DSA_SIG *sig;
70.   		sig = OPENSSL_malloc(sizeof(DSA_SIG));

crypto/dsa/dsa_asn1.c:70:3: 
68.   	if(operation == ASN1_OP_NEW_PRE) {
69.   		DSA_SIG *sig;
70. > 		sig = OPENSSL_malloc(sizeof(DSA_SIG));
71.   		sig->r = NULL;
72.   		sig->s = NULL;

crypto/mem.c:291:1: start of procedure CRYPTO_malloc()
  289.   	}
  290.   
  291. > void *CRYPTO_malloc(int num, const char *file, int line)
  292.   	{
  293.   	void *ret = NULL;

crypto/mem.c:293:2: 
  291.   void *CRYPTO_malloc(int num, const char *file, int line)
  292.   	{
  293. > 	void *ret = NULL;
  294.   	extern unsigned char cleanse_ctr;
  295.   

crypto/mem.c:296:6: Taking false branch
  294.   	extern unsigned char cleanse_ctr;
  295.   
  296.   	if (num < 0) return NULL;
              ^
  297.   
  298.   	allow_customize = 0;

crypto/mem.c:298:2: 
  296.   	if (num < 0) return NULL;
  297.   
  298. > 	allow_customize = 0;
  299.   	if (malloc_debug_func != NULL)
  300.   		{

crypto/mem.c:299:6: Taking true branch
  297.   
  298.   	allow_customize = 0;
  299.   	if (malloc_debug_func != NULL)
              ^
  300.   		{
  301.   		allow_customize_debug = 0;

crypto/mem.c:301:3: 
  299.   	if (malloc_debug_func != NULL)
  300.   		{
  301. > 		allow_customize_debug = 0;
  302.   		malloc_debug_func(NULL, num, file, line, 0);
  303.   		}

crypto/mem.c:302:3: Skipping __function_pointer__(): unresolved function pointer
  300.   		{
  301.   		allow_customize_debug = 0;
  302.   		malloc_debug_func(NULL, num, file, line, 0);
           ^
  303.   		}
  304.   	ret = malloc_ex_func(num,file,line);

crypto/mem.c:304:2: Skipping __function_pointer__(): unresolved function pointer
  302.   		malloc_debug_func(NULL, num, file, line, 0);
  303.   		}
  304.   	ret = malloc_ex_func(num,file,line);
          ^
  305.   #ifdef LEVITTE_DEBUG_MEM
  306.   	fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);

crypto/mem.c:308:6: Taking true branch
  306.   	fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);
  307.   #endif
  308.   	if (malloc_debug_func != NULL)
              ^
  309.   		malloc_debug_func(ret, num, file, line, 1);
  310.   

crypto/mem.c:309:3: Skipping __function_pointer__(): unresolved function pointer
  307.   #endif
  308.   	if (malloc_debug_func != NULL)
  309.   		malloc_debug_func(ret, num, file, line, 1);
           ^
  310.   
  311.           /* Create a dependency on the value of 'cleanse_ctr' so our memory

crypto/mem.c:314:12: Taking false branch
  312.            * sanitisation function can't be optimised out. NB: We only do
  313.            * this for >2Kb so the overhead doesn't bother us. */
  314.           if(ret && (num > 2048))
                    ^
  315.                   ((unsigned char *)ret)[0] = cleanse_ctr;
  316.   

crypto/mem.c:317:2: 
  315.                   ((unsigned char *)ret)[0] = cleanse_ctr;
  316.   
  317. > 	return ret;
  318.   	}
  319.   

crypto/mem.c:318:2: return from a call to CRYPTO_malloc
  316.   
  317.   	return ret;
  318.   	}
          ^
  319.   
  320.   void *CRYPTO_realloc(void *str, int num, const char *file, int line)

crypto/dsa/dsa_asn1.c:71:3: 
69.   		DSA_SIG *sig;
70.   		sig = OPENSSL_malloc(sizeof(DSA_SIG));
71. > 		sig->r = NULL;
72.   		sig->s = NULL;
73.   		*pval = (ASN1_VALUE *)sig;
