switch polyz_unpack unit test to malloc

Signed-off-by: Matthias J. Kannwischer <matthias@kannwischer.eu>

Author: mkannwischer

test/test_unit.c

@@ -5,6 +5,7 @@
 
 #include <stddef.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "notrandombytes/notrandombytes.h"
 
@@ -103,19 +104,24 @@ static int test_mld_polyz_unpack_core(const uint8_t *input,
 
 static int test_native_polyz_unpack(void)
 {
-  uint8_t test_bytes[MLDSA_POLYZ_PACKEDBYTES];
+  uint8_t *test_bytes = malloc(MLDSA_POLYZ_PACKEDBYTES);
   int i;
 
+  if (test_bytes == NULL)
+  {
+    return 1;
+  }
+
   memset(test_bytes, 0, MLDSA_POLYZ_PACKEDBYTES);
   CHECK(test_mld_polyz_unpack_core(test_bytes, "polyz_unpack_zeros") == 0);
 
-
   for (i = 0; i < NUM_RANDOM_TESTS; i++)
   {
     randombytes(test_bytes, MLDSA_POLYZ_PACKEDBYTES);
     CHECK(test_mld_polyz_unpack_core(test_bytes, "polyz_unpack_random") == 0);
   }
 
+  free(test_bytes);
   return 0;
 }
 #endif /* MLD_USE_NATIVE_POLYZ_UNPACK_17 || MLD_USE_NATIVE_POLYZ_UNPACK_19 */