tests/cksum_verify.c: release allocated memory.

tests/cksum_verify.c

@@ -20,14 +20,17 @@ enum {
 int
 main()
 {
-  unsigned char *test_data, *init_block;
+  unsigned char *test_data = NULL, *init_block = NULL;
   size_t num_blocks = 1000;
+
   if (!(init_block = (unsigned char *)calloc(block_size * block_size, 1U))
       || !(test_data = (unsigned char *)calloc((size_t)block_size * num_blocks, 1U)))
     return EXIT_FAILURE;
+
   /* this is supposed to be non-random */
   srand48(5L);
   init_block[7] = 15U;
+
   /* repeat block and rotate */
   for (size_t i = 1; i < block_size; ++i)
     {
@@ -36,18 +39,24 @@ main()
       memcpy(init_block + block_size * i + i, init_block,
              block_size - i);
     }
+
   for (size_t i = 0; i < num_blocks; ++i)
     {
       size_t block_idx = ((size_t)lrand48()) % block_size;
       memcpy(test_data + i, init_block + block_idx * block_size,
              block_size);
     }
+
   uint32_t cksum_result = memcrc(test_data, num_blocks * block_size);
   if (cksum_result != UINT32_C(0xc47779cd))
     {
       printf("unexpected crc result: 0x%8" PRIx32"\n", cksum_result);
       return EXIT_FAILURE;
     }
+
+  if (test_data) free(test_data);
+  if (init_block) free(init_block);
+
   return EXIT_SUCCESS;
 }