engines/ccgost/gost_sign.c:307: error: NULL_DEREFERENCE
  pointer `b` last assigned on line 306 could be null and is dereferenced by call to `BN_set_word()` at line 307, column 3.
Showing all 50 steps of the trace


engines/ccgost/gost_sign.c:294:1: start of procedure getbnfrombuf()
292.   
293.   /* Convert byte buffer to bignum, skipping leading zeros*/
294. > BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)
295.   	{
296.   	while (*buf==0&&len>0)

engines/ccgost/gost_sign.c:296:9: Loop condition is true. Entering loop body
294.   BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)
295.   	{
296.   	while (*buf==0&&len>0)
               ^
297.   		{
298.   		buf++; len--;

engines/ccgost/gost_sign.c:296:18: Loop condition is true. Entering loop body
294.   BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)
295.   	{
296.   	while (*buf==0&&len>0)
                        ^
297.   		{
298.   		buf++; len--;

engines/ccgost/gost_sign.c:298:3: 
296.   	while (*buf==0&&len>0)
297.   		{
298. > 		buf++; len--;
299.   		}
300.   	if (len)

engines/ccgost/gost_sign.c:298:10: 
296.   	while (*buf==0&&len>0)
297.   		{
298. > 		buf++; len--;
299.   		}
300.   	if (len)

engines/ccgost/gost_sign.c:296:9: Loop condition is true. Entering loop body
294.   BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)
295.   	{
296.   	while (*buf==0&&len>0)
               ^
297.   		{
298.   		buf++; len--;

engines/ccgost/gost_sign.c:296:18: Loop condition is true. Entering loop body
294.   BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)
295.   	{
296.   	while (*buf==0&&len>0)
                        ^
297.   		{
298.   		buf++; len--;

engines/ccgost/gost_sign.c:298:3: 
296.   	while (*buf==0&&len>0)
297.   		{
298. > 		buf++; len--;
299.   		}
300.   	if (len)

engines/ccgost/gost_sign.c:298:10: 
296.   	while (*buf==0&&len>0)
297.   		{
298. > 		buf++; len--;
299.   		}
300.   	if (len)

engines/ccgost/gost_sign.c:296:9: Loop condition is true. Entering loop body
294.   BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)
295.   	{
296.   	while (*buf==0&&len>0)
               ^
297.   		{
298.   		buf++; len--;

engines/ccgost/gost_sign.c:296:18: Loop condition is true. Entering loop body
294.   BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)
295.   	{
296.   	while (*buf==0&&len>0)
                        ^
297.   		{
298.   		buf++; len--;

engines/ccgost/gost_sign.c:298:3: 
296.   	while (*buf==0&&len>0)
297.   		{
298. > 		buf++; len--;
299.   		}
300.   	if (len)

engines/ccgost/gost_sign.c:298:10: 
296.   	while (*buf==0&&len>0)
297.   		{
298. > 		buf++; len--;
299.   		}
300.   	if (len)

engines/ccgost/gost_sign.c:296:9: Loop condition is false. Leaving loop
294.   BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)
295.   	{
296.   	while (*buf==0&&len>0)
               ^
297.   		{
298.   		buf++; len--;

engines/ccgost/gost_sign.c:300:6: Taking false branch
298.   		buf++; len--;
299.   		}
300.   	if (len)
            ^
301.   		{
302.   		return BN_bin2bn(buf,len,NULL);

engines/ccgost/gost_sign.c:306:3: 
304.   	else
305.   		{
306. > 		BIGNUM *b=BN_new();
307.   		BN_zero(b);
308.   		return b;

crypto/bn/bn_lib.c:298:1: start of procedure BN_new()
  296.   	}
  297.   
  298. > BIGNUM *BN_new(void)
  299.   	{
  300.   	BIGNUM *ret;

crypto/bn/bn_lib.c:302:6: 
  300.   	BIGNUM *ret;
  301.   
  302. > 	if ((ret=(BIGNUM *)OPENSSL_malloc(sizeof(BIGNUM))) == NULL)
  303.   		{
  304.   		BNerr(BN_F_BN_NEW,ERR_R_MALLOC_FAILURE);

crypto/mem.c:294:1: start of procedure CRYPTO_malloc()
    292.   	}
    293.   
    294. > void *CRYPTO_malloc(int num, const char *file, int line)
    295.   	{
    296.   	void *ret = NULL;

crypto/mem.c:296:2: 
    294.   void *CRYPTO_malloc(int num, const char *file, int line)
    295.   	{
    296. > 	void *ret = NULL;
    297.   
    298.   	if (num <= 0) return NULL;

crypto/mem.c:298:6: Taking false branch
    296.   	void *ret = NULL;
    297.   
    298.   	if (num <= 0) return NULL;
                ^
    299.   
    300.   	allow_customize = 0;

crypto/mem.c:300:2: 
    298.   	if (num <= 0) return NULL;
    299.   
    300. > 	allow_customize = 0;
    301.   	if (malloc_debug_func != NULL)
    302.   		{

crypto/mem.c:301:6: Taking true branch
    299.   
    300.   	allow_customize = 0;
    301.   	if (malloc_debug_func != NULL)
                ^
    302.   		{
    303.   		allow_customize_debug = 0;

crypto/mem.c:303:3: 
    301.   	if (malloc_debug_func != NULL)
    302.   		{
    303. > 		allow_customize_debug = 0;
    304.   		malloc_debug_func(NULL, num, file, line, 0);
    305.   		}

crypto/mem.c:304:3: Skipping __function_pointer__(): unresolved function pointer
    302.   		{
    303.   		allow_customize_debug = 0;
    304.   		malloc_debug_func(NULL, num, file, line, 0);
             ^
    305.   		}
    306.   	ret = malloc_ex_func(num,file,line);

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

crypto/mem.c:310:6: Taking true branch
    308.   	fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);
    309.   #endif
    310.   	if (malloc_debug_func != NULL)
                ^
    311.   		malloc_debug_func(ret, num, file, line, 1);
    312.   

crypto/mem.c:311:3: Skipping __function_pointer__(): unresolved function pointer
    309.   #endif
    310.   	if (malloc_debug_func != NULL)
    311.   		malloc_debug_func(ret, num, file, line, 1);
             ^
    312.   
    313.   #ifndef OPENSSL_CPUID_OBJ

crypto/mem.c:317:12: Taking false branch
    315.            * sanitisation function can't be optimised out. NB: We only do
    316.            * this for >2Kb so the overhead doesn't bother us. */
    317.           if(ret && (num > 2048))
                      ^
    318.   	{	extern unsigned char cleanse_ctr;
    319.                   ((unsigned char *)ret)[0] = cleanse_ctr;

crypto/mem.c:323:2: 
    321.   #endif
    322.   
    323. > 	return ret;
    324.   	}
    325.   

crypto/mem.c:324:2: return from a call to CRYPTO_malloc
    322.   
    323.   	return ret;
    324.   	}
            ^
    325.   
    326.   void *CRYPTO_realloc(void *str, int num, const char *file, int line)

crypto/bn/bn_lib.c:302:6: Taking true branch
  300.   	BIGNUM *ret;
  301.   
  302.   	if ((ret=(BIGNUM *)OPENSSL_malloc(sizeof(BIGNUM))) == NULL)
              ^
  303.   		{
  304.   		BNerr(BN_F_BN_NEW,ERR_R_MALLOC_FAILURE);

crypto/bn/bn_lib.c:304:3: 
  302.   	if ((ret=(BIGNUM *)OPENSSL_malloc(sizeof(BIGNUM))) == NULL)
  303.   		{
  304. > 		BNerr(BN_F_BN_NEW,ERR_R_MALLOC_FAILURE);
  305.   		return(NULL);
  306.   		}

crypto/err/err.c:706:1: start of procedure ERR_put_error()
    704.   /********************************************************/
    705.   
    706. > void ERR_put_error(int lib, int func, int reason, const char *file,
    707.   	     int line)
    708.   	{

crypto/err/err.c:730:2: Skipping ERR_get_state(): empty list of specs
    728.   	}
    729.   #endif
    730.   	es=ERR_get_state();
            ^
    731.   
    732.   	es->top=(es->top+1)%ERR_NUM_ERRORS;

crypto/err/err.c:732:2: 
    730.   	es=ERR_get_state();
    731.   
    732. > 	es->top=(es->top+1)%ERR_NUM_ERRORS;
    733.   	if (es->top == es->bottom)
    734.   		es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;

crypto/err/err.c:733:6: Taking false branch
    731.   
    732.   	es->top=(es->top+1)%ERR_NUM_ERRORS;
    733.   	if (es->top == es->bottom)
                ^
    734.   		es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
    735.   	es->err_flags[es->top]=0;

crypto/err/err.c:735:2: 
    733.   	if (es->top == es->bottom)
    734.   		es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
    735. > 	es->err_flags[es->top]=0;
    736.   	es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
    737.   	es->err_file[es->top]=file;

crypto/err/err.c:736:2: 
    734.   		es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
    735.   	es->err_flags[es->top]=0;
    736. > 	es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
    737.   	es->err_file[es->top]=file;
    738.   	es->err_line[es->top]=line;

crypto/err/err.c:737:2: 
    735.   	es->err_flags[es->top]=0;
    736.   	es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
    737. > 	es->err_file[es->top]=file;
    738.   	es->err_line[es->top]=line;
    739.   	err_clear_data(es,es->top);

crypto/err/err.c:738:2: 
    736.   	es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
    737.   	es->err_file[es->top]=file;
    738. > 	es->err_line[es->top]=line;
    739.   	err_clear_data(es,es->top);
    740.   	}

crypto/err/err.c:739:2: Taking true branch
    737.   	es->err_file[es->top]=file;
    738.   	es->err_line[es->top]=line;
    739.   	err_clear_data(es,es->top);
            ^
    740.   	}
    741.   

crypto/err/err.c:739:2: Taking false branch
    737.   	es->err_file[es->top]=file;
    738.   	es->err_line[es->top]=line;
    739.   	err_clear_data(es,es->top);
            ^
    740.   	}
    741.   

crypto/err/err.c:739:2: Loop condition is false. Leaving loop
    737.   	es->err_file[es->top]=file;
    738.   	es->err_line[es->top]=line;
    739.   	err_clear_data(es,es->top);
            ^
    740.   	}
    741.   

crypto/err/err.c:740:2: return from a call to ERR_put_error
    738.   	es->err_line[es->top]=line;
    739.   	err_clear_data(es,es->top);
    740.   	}
            ^
    741.   
    742.   void ERR_clear_error(void)

crypto/bn/bn_lib.c:305:3: 
  303.   		{
  304.   		BNerr(BN_F_BN_NEW,ERR_R_MALLOC_FAILURE);
  305. > 		return(NULL);
  306.   		}
  307.   	ret->flags=BN_FLG_MALLOCED;

crypto/bn/bn_lib.c:314:2: return from a call to BN_new
  312.   	bn_check_top(ret);
  313.   	return(ret);
  314.   	}
          ^
  315.   
  316.   /* This is used both by bn_expand2() and bn_dup_expand() */

engines/ccgost/gost_sign.c:307:3: 
305.   		{
306.   		BIGNUM *b=BN_new();
307. > 		BN_zero(b);
308.   		return b;
309.   		}

crypto/bn/bn_lib.c:586:1: start of procedure BN_set_word()
  584.   	}
  585.   
  586. > int BN_set_word(BIGNUM *a, BN_ULONG w)
  587.   	{
  588.   	bn_check_top(a);

crypto/bn/bn_lib.c:589:6: 
  587.   	{
  588.   	bn_check_top(a);
  589. > 	if (bn_expand(a,(int)sizeof(BN_ULONG)*8) == NULL) return(0);
  590.   	a->neg = 0;
  591.   	a->d[0] = w;

BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)
	{
	while (*buf==0&&len>0)
		{
		buf++; len--;
		}
	if (len)
		{
		return BN_bin2bn(buf,len,NULL);
		}
	else
		{
		BIGNUM *b=BN_new();
		BN_zero(b);
		return b;
		}
	}
['BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len)\n\t{\n\twhile (*buf==0&&len>0)\n\t\t{\n\t\tbuf++; len--;\n\t\t}\n\tif (len)\n\t\t{\n\t\treturn BN_bin2bn(buf,len,NULL);\n\t\t}\n\telse\n\t\t{\n\t\tBIGNUM *b=BN_new();\n\t\tBN_zero(b);\n\t\treturn b;\n\t\t}\n\t}', 'BIGNUM *BN_new(void)\n\t{\n\tBIGNUM *ret;\n\tif ((ret=(BIGNUM *)OPENSSL_malloc(sizeof(BIGNUM))) == NULL)\n\t\t{\n\t\tBNerr(BN_F_BN_NEW,ERR_R_MALLOC_FAILURE);\n\t\treturn(NULL);\n\t\t}\n\tret->flags=BN_FLG_MALLOCED;\n\tret->top=0;\n\tret->neg=0;\n\tret->dmax=0;\n\tret->d=NULL;\n\tbn_check_top(ret);\n\treturn(ret);\n\t}', 'void *CRYPTO_malloc(int num, const char *file, int line)\n\t{\n\tvoid *ret = NULL;\n\tif (num <= 0) return NULL;\n\tallow_customize = 0;\n\tif (malloc_debug_func != NULL)\n\t\t{\n\t\tallow_customize_debug = 0;\n\t\tmalloc_debug_func(NULL, num, file, line, 0);\n\t\t}\n\tret = malloc_ex_func(num,file,line);\n#ifdef LEVITTE_DEBUG_MEM\n\tfprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\\n", ret, num);\n#endif\n\tif (malloc_debug_func != NULL)\n\t\tmalloc_debug_func(ret, num, file, line, 1);\n#ifndef OPENSSL_CPUID_OBJ\n        if(ret && (num > 2048))\n\t{\textern unsigned char cleanse_ctr;\n                ((unsigned char *)ret)[0] = cleanse_ctr;\n\t}\n#endif\n\treturn ret;\n\t}', 'void ERR_put_error(int lib, int func, int reason, const char *file,\n\t     int line)\n\t{\n\tERR_STATE *es;\n#ifdef _OSD_POSIX\n\tif (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {\n\t\tchar *end;\n\t\tfile += sizeof("*POSIX(")-1;\n\t\tend = &file[strlen(file)-1];\n\t\tif (*end == \')\')\n\t\t\t*end = \'\\0\';\n\t\tif ((end = strrchr(file, \'/\')) != NULL)\n\t\t\tfile = &end[1];\n\t}\n#endif\n\tes=ERR_get_state();\n\tes->top=(es->top+1)%ERR_NUM_ERRORS;\n\tif (es->top == es->bottom)\n\t\tes->bottom=(es->bottom+1)%ERR_NUM_ERRORS;\n\tes->err_flags[es->top]=0;\n\tes->err_buffer[es->top]=ERR_PACK(lib,func,reason);\n\tes->err_file[es->top]=file;\n\tes->err_line[es->top]=line;\n\terr_clear_data(es,es->top);\n\t}', 'int BN_set_word(BIGNUM *a, BN_ULONG w)\n\t{\n\tbn_check_top(a);\n\tif (bn_expand(a,(int)sizeof(BN_ULONG)*8) == NULL) return(0);\n\ta->neg = 0;\n\ta->d[0] = w;\n\ta->top = (w ? 1 : 0);\n\tbn_check_top(a);\n\treturn(1);\n\t}']