[PATCH] selftests: mm: check return values

[Muhammad Usama Anjum]

Check return value and return error/skip the tests.

Fixes: 46fd75d4a3c9 ("selftests: mm: add pagemap ioctl tests")
Signed-off-by: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
---
 tools/testing/selftests/mm/pagemap_ioctl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
index 2d785aca72a5c..bcc73b4e805c6 100644
--- a/tools/testing/selftests/mm/pagemap_ioctl.c
+++ b/tools/testing/selftests/mm/pagemap_ioctl.c
@@ -1567,8 +1567,10 @@ int main(int argc, char *argv[])
 	/* 7. File Hugetlb testing */
 	mem_size = 2*1024*1024;
 	fd = memfd_create("uffd-test", MFD_HUGETLB | MFD_NOEXEC_SEAL);
+	if (fd < 0)
+		ksft_exit_fail_msg("uffd-test creation failed %d %s\n", errno, strerror(errno));
 	mem = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-	if (mem) {
+	if (mem != MAP_FAILED) {
 		wp_init(mem, mem_size);
 		wp_addr_range(mem, mem_size);
 
-- 
2.39.2