From 8685eb5c5333dd4487457d582cd61080d4cedc8d 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: pmem: 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/pmem.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/virtio-devices/src/pmem.rs b/virtio-devices/src/pmem.rs
index 94f2716b6..9024bcfa2 100644
--- a/virtio-devices/src/pmem.rs
+++ b/virtio-devices/src/pmem.rs
@@ -115,7 +115,7 @@ impl Request {
             return Err(Error::UnexpectedWriteOnlyDescriptor);
         }
 
-        if desc.len() as usize != size_of::<VirtioPmemReq>() {
+        if (desc.len() as usize) < size_of::<VirtioPmemReq>() {
             return Err(Error::InvalidRequest);
         }