linux-kernel - [RFC PATCH 02/10] KVM: selftests: Test that ftruncate to non-page-aligned size on a restrictedmem fd should fail

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Message-ID: <75eba82a2666b0caa96ed0484a713037045ed114.1678926164.git.ackerleytng@google.com>
Date:   Thu, 16 Mar 2023 00:30:55 +0000
From:   Ackerley Tng <ackerleytng@...gle.com>
To:     kvm@...r.kernel.org, linux-api@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
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        Ackerley Tng <ackerleytng@...gle.com>
Subject: [RFC PATCH 02/10] KVM: selftests: Test that ftruncate to
 non-page-aligned size on a restrictedmem fd should fail

Signed-off-by: Ackerley Tng <ackerleytng@...gle.com>
---
 tools/testing/selftests/vm/memfd_restricted.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/vm/memfd_restricted.c b/tools/testing/selftests/vm/memfd_restricted.c
index 43a512f273f7..9c4e6a0becbc 100644
--- a/tools/testing/selftests/vm/memfd_restricted.c
+++ b/tools/testing/selftests/vm/memfd_restricted.c
@@ -38,6 +38,11 @@ static void test_file_size(int fd)
 {
 	struct stat sb;
 
+	if (!ftruncate(fd, page_size + 1)) {
+		fail("ftruncate to non page-aligned sizes should fail\n");
+		return;
+	}
+
 	if (ftruncate(fd, page_size)) {
 		fail("ftruncate failed\n");
 		return;
-- 
2.40.0.rc2.332.ga46443480c-goog