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virtio-devices: mem: Respond to unknown request types

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An unknown request type caused process_queue to return an error that
killed the device thread. The request/response descriptors are already
parsed at this point, so respond with VIRTIO_MEM_RESP_ERROR and
continue processing.

Signed-off-by: Rob Bradford <rbradford@meta.com>
Assisted-by: Claude:claude-opus-4-6
This commit is contained in:
Rob Bradford
2026-05-06 14:16:59 +01:00
parent ce74caa6c2
commit 97e16f249f
1 changed files with 3 additions and 2 deletions
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5
virtio-devices/src/mem.rs
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@@ -23,7 +23,7 @@ use std::{io, result};
use anyhow::anyhow;
use event_monitor::event;
use log::{error, info};
use log::{error, info, warn};
use seccompiler::SeccompAction;
use serde::{Deserialize, Serialize};
use thiserror::Error;
@@ -654,7 +654,8 @@ impl MemEpollHandler {
VIRTIO_MEM_REQ_UNPLUG_ALL => (self.unplug_all(), 0u16),
VIRTIO_MEM_REQ_STATE => self.state_request(r.req.addr, r.req.nb_blocks),
_ => {
return Err(Error::UnknownRequestType(r.req.req_type));
warn!("Unknown request type: {}", r.req.req_type);
(VIRTIO_MEM_RESP_ERROR, 0u16)
}
};
let len = r.send_response(desc_chain.memory(), resp_type, resp_state)?;