Test that the cache invalidation ioctl rejects an oversized entry_len and an oversized entry_num, covering the CPU soft-lockup paths the caps close.
Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Nicolin Chen <[email protected]> --- tools/testing/selftests/iommu/iommufd.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c index d1fe5dbc2813e..653aa251f8122 100644 --- a/tools/testing/selftests/iommu/iommufd.c +++ b/tools/testing/selftests/iommu/iommufd.c @@ -556,6 +556,21 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested) 1, &num_inv); assert(!num_inv); + /* Negative test: entry_len is bounded by PAGE_SIZE */ + num_inv = 1; + test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs, + IOMMU_HWPT_INVALIDATE_DATA_SELFTEST, + PAGE_SIZE + 1, &num_inv); + assert(!num_inv); + + /* Negative test: entry_num is bounded */ +#define IOMMU_HWPT_INVALIDATE_ENTRY_NUM_MAX (1U << 19) + num_inv = IOMMU_HWPT_INVALIDATE_ENTRY_NUM_MAX + 1; + test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs, + IOMMU_HWPT_INVALIDATE_DATA_SELFTEST, + sizeof(*inv_reqs), &num_inv); + assert(!num_inv); + /* Negative test: invalid flag is passed */ num_inv = 1; inv_reqs[0].flags = 0xffffffff; -- 2.43.0
