1 files changed, 3 insertions, 1 deletions

diff --git a/tools/testing/selftests/vm/hugetlbfstest.c b/tools/testing/selftests/vm/hugetlbfstest.c
index ea40ff8c2391..02e1072ec187 100644
--- a/tools/testing/selftests/vm/hugetlbfstest.c
+++ b/tools/testing/selftests/vm/hugetlbfstest.c
@@ -34,6 +34,7 @@ static void do_mmap(int fd, int extra_flags, int unmap)
         int *p;
         int flags = MAP_PRIVATE | MAP_POPULATE | extra_flags;
         u64 before, after;
+        int ret;
 
         before = read_rss();
         p = mmap(NULL, length, PROT_READ | PROT_WRITE, flags, fd, 0);
@@ -44,7 +45,8 @@ static void do_mmap(int fd, int extra_flags, int unmap)
                         !"rss didn't grow as expected");
         if (!unmap)
                 return;
-        munmap(p, length);
+        ret = munmap(p, length);
+        assert(!ret || !"munmap returned an unexpected error");
         after = read_rss();
         assert(llabs(after - before) < 0x40000 ||
                         !"rss didn't shrink as expected");