selftests/mm/cow: fix the incorrect error handling

[ Upstream commit f841ad9ca5007167c02de143980c9dc703f90b3d ]

Error handling doesn't check the correct return value.  This patch will
fix it.

Link: https://lkml.kernel.org/r/20250312043840.71799-1-cyan.yang@sifive.com
Fixes: f4b5fd6946e2 ("selftests/vm: anon_cow: THP tests")
Signed-off-by: Cyan Yang <cyan.yang@sifive.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
index 6f2f839904416c4d1dce542b2dd04250e2bddaa2..76d37904172db3bbea31b5873a626b77c3efb19d 100644 (file)
--- a/tools/testing/selftests/mm/cow.c
+++ b/tools/testing/selftests/mm/cow.c
@@ -812,7 +812,7 @@ static void do_run_with_thp(test_fn fn, enum thp_run thp_run)
                mremap_size = thpsize / 2;
                mremap_mem = mmap(NULL, mremap_size, PROT_NONE,
                                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-               if (mem == MAP_FAILED) {
+               if (mremap_mem == MAP_FAILED) {
                        ksft_test_result_fail("mmap() failed\n");
                        goto munmap;
                }