From 82d426162d87bb2d9abd8588ad3fed11e2251a49 Mon Sep 17 00:00:00 2001
From: Rob Bradford <rbradford@meta.com>
Date: Sat, 18 Apr 2026 11:18:46 +0100
Subject: [PATCH] virtio-devices: mem: Relax descriptor size check

The virtio spec allows the use of larger descriptors (for future
expansion). Relax the bounds check to only reject descriptors that are
too small.

Signed-off-by: Rob Bradford <rbradford@meta.com>
---
 virtio-devices/src/mem.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/virtio-devices/src/mem.rs b/virtio-devices/src/mem.rs
index 067100164..727fd72c0 100644
--- a/virtio-devices/src/mem.rs
+++ b/virtio-devices/src/mem.rs
@@ -293,7 +293,7 @@ impl Request {
         if desc.is_write_only() {
             return Err(Error::UnexpectedWriteOnlyDescriptor);
         }
-        if desc.len() as usize != size_of::<VirtioMemReq>() {
+        if (desc.len() as usize) < size_of::<VirtioMemReq>() {
             return Err(Error::InvalidRequest);
         }
         let req: VirtioMemReq = desc_chain