From: Christian Brauner <christian.brauner@xxxxxxxxxx>
Test that openat2() rejects unknown flags in the upper 32 bit range.
Cc: Richard Guy Briggs <rgb@xxxxxxxxxx>
Cc: Aleksa Sarai <cyphar@xxxxxxxxxx>
Cc: linux-fsdevel@xxxxxxxxxxxxxxx
Signed-off-by: Christian Brauner <christian.brauner@xxxxxxxxxx>
---
tools/testing/selftests/openat2/openat2_test.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/openat2/openat2_test.c b/tools/testing/selftests/openat2/openat2_test.c
index 381d874cce99..7379e082a994 100644
--- a/tools/testing/selftests/openat2/openat2_test.c
+++ b/tools/testing/selftests/openat2/openat2_test.c
@@ -155,7 +155,7 @@ struct flag_test {
int err;
};
-#define NUM_OPENAT2_FLAG_TESTS 24
+#define NUM_OPENAT2_FLAG_TESTS 25
void test_openat2_flags(void)
{
@@ -229,6 +229,11 @@ void test_openat2_flags(void)
{ .name = "invalid how.resolve and O_PATH",
.how.flags = O_PATH,
.how.resolve = 0x1337, .err = -EINVAL },
+
+ /* Invalid flags in the upper 32 bits must be rejected. */
+ { .name = "invalid flags (1 << 63)",
+ .how.flags = O_RDONLY | (1ULL << 63),
+ .how.resolve = 0, .err = -EINVAL },
};
BUILD_BUG_ON(ARRAY_LEN(tests) != NUM_OPENAT2_FLAG_TESTS);
--
2.27.0
