From 9994715333515e82865e533250e488496b9742f4 Mon Sep 17 00:00:00 2001 From: Niels Dossche Date: Mon, 9 May 2022 18:20:54 -0700 Subject: selftest/vm: test that mremap fails on non-existent vma Add a regression test that validates that mremap fails for vma's that don't exist. Link: https://lkml.kernel.org/r/20220427224439.23828-3-dossche.niels@gmail.com Signed-off-by: Niels Dossche Cc: Mina Almasry Cc: Mike Kravetz Signed-off-by: Andrew Morton --- tools/testing/selftests/vm/hugepage-mremap.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'tools') diff --git a/tools/testing/selftests/vm/hugepage-mremap.c b/tools/testing/selftests/vm/hugepage-mremap.c index 1d689084a54b..585978f181ed 100644 --- a/tools/testing/selftests/vm/hugepage-mremap.c +++ b/tools/testing/selftests/vm/hugepage-mremap.c @@ -178,6 +178,12 @@ int main(int argc, char *argv[]) munmap(addr, length); + addr = mremap(addr, length, length, 0); + if (addr != MAP_FAILED) { + printf("mremap: Expected failure, but call succeeded\n"); + exit(1); + } + close(fd); unlink(argv[argc-1]); -- cgit v1.2.3