diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
index 6304eb0947a3..d7366074e2a8 100644
--- a/tools/testing/selftests/mm/mremap_test.c
+++ b/tools/testing/selftests/mm/mremap_test.c
@@ -29,6 +29,7 @@ struct config {
 	unsigned long long dest_alignment;
 	unsigned long long region_size;
 	int overlapping;
+	int dest_preamble_size;
 };
 
 struct test {
@@ -283,7 +284,7 @@ static void *get_source_mapping(struct config c)
 static long long remap_region(struct config c, unsigned int threshold_mb,
 			      char pattern_seed)
 {
-	void *addr, *src_addr, *dest_addr;
+	void *addr, *src_addr, *dest_addr, *dest_preamble_addr;
 	unsigned long long i;
 	struct timespec t_start = {0, 0}, t_end = {0, 0};
 	long long  start_ns, end_ns, align_mask, ret, offset;
@@ -300,7 +301,7 @@ static long long remap_region(struct config c, unsigned int threshold_mb,
 		goto out;
 	}
 
-	/* Set byte pattern */
+	/* Set byte pattern for source block. */
 	srand(pattern_seed);
 	for (i = 0; i < threshold; i++)
 		memset((char *) src_addr + i, (char) rand(), 1);
@@ -312,6 +313,9 @@ static long long remap_region(struct config c, unsigned int threshold_mb,
 	addr = (void *) (((unsigned long long) src_addr + c.region_size
 			  + offset) & align_mask);
 
+	/* Remap after the destination block preamble. */
+	addr += c.dest_preamble_size;
+
 	/* See comment in get_source_mapping() */
 	if (!((unsigned long long) addr & c.dest_alignment))
 		addr = (void *) ((unsigned long long) addr | c.dest_alignment);
@@ -327,6 +331,24 @@ static long long remap_region(struct config c, unsigned int threshold_mb,
 		addr += c.dest_alignment;
 	}
 
+	if (c.dest_preamble_size) {
+		dest_preamble_addr = mmap((void *) addr - c.dest_preamble_size, c.dest_preamble_size,
+					  PROT_READ | PROT_WRITE,
+					  MAP_FIXED_NOREPLACE | MAP_ANONYMOUS | MAP_SHARED,
+							-1, 0);
+		if (dest_preamble_addr == MAP_FAILED) {
+			ksft_print_msg("Failed to map dest preamble region: %s\n",
+					strerror(errno));
+			ret = -1;
+			goto clean_up_src;
+		}
+
+		/* Set byte pattern for the dest preamble block. */
+		srand(pattern_seed);
+		for (i = 0; i < c.dest_preamble_size; i++)
+			memset((char *) dest_preamble_addr + i, (char) rand(), 1);
+	}
+
 	clock_gettime(CLOCK_MONOTONIC, &t_start);
 	dest_addr = mremap(src_addr, c.region_size, c.region_size,
 					  MREMAP_MAYMOVE|MREMAP_FIXED, (char *) addr);
@@ -335,7 +357,7 @@ static long long remap_region(struct config c, unsigned int threshold_mb,
 	if (dest_addr == MAP_FAILED) {
 		ksft_print_msg("mremap failed: %s\n", strerror(errno));
 		ret = -1;
-		goto clean_up_src;
+		goto clean_up_dest_preamble;
 	}
 
 	/* Verify byte pattern after remapping */
@@ -353,6 +375,23 @@ static long long remap_region(struct config c, unsigned int threshold_mb,
 		}
 	}
 
+	/* Verify the dest preamble byte pattern after remapping */
+	if (c.dest_preamble_size) {
+		srand(pattern_seed);
+		for (i = 0; i < c.dest_preamble_size; i++) {
+			char c = (char) rand();
+
+			if (((char *) dest_preamble_addr)[i] != c) {
+				ksft_print_msg("Preamble data after remap doesn't match at offset %d\n",
+					       i);
+				ksft_print_msg("Expected: %#x\t Got: %#x\n", c & 0xff,
+					       ((char *) dest_preamble_addr)[i] & 0xff);
+				ret = -1;
+				goto clean_up_dest;
+			}
+		}
+	}
+
 	start_ns = t_start.tv_sec * NS_PER_SEC + t_start.tv_nsec;
 	end_ns = t_end.tv_sec * NS_PER_SEC + t_end.tv_nsec;
 	ret = end_ns - start_ns;
@@ -365,6 +404,9 @@ static long long remap_region(struct config c, unsigned int threshold_mb,
  */
 clean_up_dest:
 	munmap(dest_addr, c.region_size);
+clean_up_dest_preamble:
+	if (c.dest_preamble_size && dest_preamble_addr)
+		munmap(dest_preamble_addr, c.dest_preamble_size);
 clean_up_src:
 	munmap(src_addr, c.region_size);
 out:
@@ -440,7 +482,7 @@ static int parse_args(int argc, char **argv, unsigned int *threshold_mb,
 	return 0;
 }
 
-#define MAX_TEST 14
+#define MAX_TEST 15
 #define MAX_PERF_TEST 3
 int main(int argc, char **argv)
 {
@@ -449,7 +491,7 @@ int main(int argc, char **argv)
 	unsigned int threshold_mb = VALIDATION_DEFAULT_THRESHOLD;
 	unsigned int pattern_seed;
 	int num_expand_tests = 2;
-	struct test test_cases[MAX_TEST];
+	struct test test_cases[MAX_TEST] = {};
 	struct test perf_test_cases[MAX_PERF_TEST];
 	int page_size;
 	time_t t;
@@ -510,6 +552,11 @@ int main(int argc, char **argv)
 	test_cases[13] = MAKE_TEST(_1MB, _1MB, _5MB, NON_OVERLAPPING, EXPECT_SUCCESS,
 				  "5MB mremap - Source 1MB-aligned, Destination 1MB-aligned");
 
+	/* Src and Dest addr 1MB aligned. 5MB mremap. */
+	test_cases[14] = MAKE_TEST(_1MB, _1MB, _5MB, NON_OVERLAPPING, EXPECT_SUCCESS,
+				  "5MB mremap - Source 1MB-aligned, Dest 1MB-aligned with 40MB Preamble");
+	test_cases[14].config.dest_preamble_size = 10 * _4MB;
+
 	perf_test_cases[0] =  MAKE_TEST(page_size, page_size, _1GB, NON_OVERLAPPING, EXPECT_SUCCESS,
 					"1GB mremap - Source PTE-aligned, Destination PTE-aligned");
 	/*