ssl/ssl_ciph.c:1171: error: NULL_DEREFERENCE
  pointer `comp` last assigned on line 1170 could be null and is dereferenced at line 1171, column 2.
Showing all 20 steps of the trace


ssl/ssl_ciph.c:1150:1: start of procedure SSL_COMP_add_compression_method()
1148.   	}
1149.   
1150. > int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1151.   	{
1152.   	SSL_COMP *comp;

ssl/ssl_ciph.c:1154:13: Taking false branch
1152.   	SSL_COMP *comp;
1153.   
1154.           if (cm == NULL || cm->type == NID_undef)
                    ^
1155.                   return 1;
1156.   

ssl/ssl_ciph.c:1154:27: Taking false branch
1152.   	SSL_COMP *comp;
1153.   
1154.           if (cm == NULL || cm->type == NID_undef)
                                  ^
1155.                   return 1;
1156.   

ssl/ssl_ciph.c:1163:6: Taking false branch
1161.   	   64 to 192:  external party methods assigned by IANA
1162.   	   193 to 255: reserved for private use */
1163.   	if (id < 193 || id > 255)
             ^
1164.   		{
1165.   		SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);

ssl/ssl_ciph.c:1163:18: Taking false branch
1161.   	   64 to 192:  external party methods assigned by IANA
1162.   	   193 to 255: reserved for private use */
1163.   	if (id < 193 || id > 255)
                         ^
1164.   		{
1165.   		SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);

ssl/ssl_ciph.c:1169:2: Skipping CRYPTO_mem_ctrl(): empty list of specs
1167.   		}
1168.   
1169.   	MemCheck_off();
         ^
1170.   	comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1171.   	comp->id=id;

ssl/ssl_ciph.c:1170:2: 
1168.   
1169.   	MemCheck_off();
1170. > 	comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1171.   	comp->id=id;
1172.   	comp->method=cm;

crypto/mem.c:289:1: start of procedure CRYPTO_malloc()
  287.   	}
  288.   
  289. > void *CRYPTO_malloc(int num, const char *file, int line)
  290.   	{
  291.   	void *ret = NULL;

crypto/mem.c:291:2: 
  289.   void *CRYPTO_malloc(int num, const char *file, int line)
  290.   	{
  291. > 	void *ret = NULL;
  292.   	extern unsigned char cleanse_ctr;
  293.   

crypto/mem.c:294:2: 
  292.   	extern unsigned char cleanse_ctr;
  293.   
  294. > 	allow_customize = 0;
  295.   	if (malloc_debug_func != NULL)
  296.   		{

crypto/mem.c:295:6: Taking true branch
  293.   
  294.   	allow_customize = 0;
  295.   	if (malloc_debug_func != NULL)
              ^
  296.   		{
  297.   		allow_customize_debug = 0;

crypto/mem.c:297:3: 
  295.   	if (malloc_debug_func != NULL)
  296.   		{
  297. > 		allow_customize_debug = 0;
  298.   		malloc_debug_func(NULL, num, file, line, 0);
  299.   		}

crypto/mem.c:298:3: Skipping __function_pointer__(): unresolved function pointer
  296.   		{
  297.   		allow_customize_debug = 0;
  298.   		malloc_debug_func(NULL, num, file, line, 0);
           ^
  299.   		}
  300.   	ret = malloc_ex_func(num,file,line);

crypto/mem.c:300:2: Skipping __function_pointer__(): unresolved function pointer
  298.   		malloc_debug_func(NULL, num, file, line, 0);
  299.   		}
  300.   	ret = malloc_ex_func(num,file,line);
          ^
  301.   #ifdef LEVITTE_DEBUG_MEM
  302.   	fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);

crypto/mem.c:304:6: Taking true branch
  302.   	fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);
  303.   #endif
  304.   	if (malloc_debug_func != NULL)
              ^
  305.   		malloc_debug_func(ret, num, file, line, 1);
  306.   

crypto/mem.c:305:3: Skipping __function_pointer__(): unresolved function pointer
  303.   #endif
  304.   	if (malloc_debug_func != NULL)
  305.   		malloc_debug_func(ret, num, file, line, 1);
           ^
  306.   
  307.           /* Create a dependency on the value of 'cleanse_ctr' so our memory

crypto/mem.c:310:12: Taking false branch
  308.            * sanitisation function can't be optimised out. NB: We only do
  309.            * this for >2Kb so the overhead doesn't bother us. */
  310.           if(ret && (num > 2048))
                    ^
  311.                   ((unsigned char *)ret)[0] = cleanse_ctr;
  312.   

crypto/mem.c:313:2: 
  311.                   ((unsigned char *)ret)[0] = cleanse_ctr;
  312.   
  313. > 	return ret;
  314.   	}
  315.   

crypto/mem.c:314:2: return from a call to CRYPTO_malloc
  312.   
  313.   	return ret;
  314.   	}
          ^
  315.   
  316.   void *CRYPTO_realloc(void *str, int num, const char *file, int line)

ssl/ssl_ciph.c:1171:2: 
1169.   	MemCheck_off();
1170.   	comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1171. > 	comp->id=id;
1172.   	comp->method=cm;
1173.   	load_builtin_compressions();
