From 2eddaf506e15072480785f1d17e29566e8a9f101 Mon Sep 17 00:00:00 2001 From: Anatol Belski Date: Fri, 15 May 2026 01:25:09 +0200 Subject: [PATCH] vm-virtio: checked_descriptor: Add unit test for failed_addr Drive CheckedDescriptorIter with an out of range descriptor and assert that failed_addr returns Some carrying the GuestAddress of the rejected descriptor, not just the failed boolean. Signed-off-by: Anatol Belski --- vm-virtio/src/checked_descriptor.rs | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/vm-virtio/src/checked_descriptor.rs b/vm-virtio/src/checked_descriptor.rs index 63af4866b..8f68f1821 100644 --- a/vm-virtio/src/checked_descriptor.rs +++ b/vm-virtio/src/checked_descriptor.rs @@ -336,4 +336,14 @@ mod unit_tests { .expect_err("validation must reject the descriptor"); assert_eq!(err.0, 0x4000); } + + #[test] + fn err_reports_rejected_address() { + let (_mem, mem_atomic, mut queue) = setup_vq(128 * 1024, 0x4000, 1 << 30, 0); + let mem_guard = mem_atomic.memory(); + let mut chain = queue.pop_descriptor_chain(mem_guard).unwrap(); + let mut it = chain.checked_iter(None); + let result = it.next().expect("must yield an item"); + assert_eq!(result.unwrap_err(), GuestAddress(0x4000)); + } }