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virtio-devices: balloon: Handle reporting queue errors gracefully

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Address translation or memory release errors on the free page
reporting queue propagated up and killed the balloon device thread.
Log a warning and skip the offending descriptor so the device
continues operating.

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 13:42:37 +01:00
parent c1b5b18d9c
commit ce74caa6c2
1 changed files with 13 additions and 3 deletions
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16
virtio-devices/src/balloon.rs
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@@ -357,11 +357,21 @@ impl BalloonEpollHandler {
let mut descs_len = 0; let mut descs_len = 0;
while let Some(desc) = desc_chain.next() { while let Some(desc) = desc_chain.next() {
descs_len += desc.len(); descs_len += desc.len();
let addr = desc let addr = match desc
.addr() .addr()
.translate_gva(self.access_platform.as_deref(), desc.len() as usize) .translate_gva(self.access_platform.as_deref(), desc.len() as usize)
.map_err(|e| Error::GuestMemory(GuestMemoryError::IOError(e)))?; {
Self::release_memory_range(desc_chain.memory(), addr, desc.len() as usize)?; Ok(a) => a,
Err(e) => {
warn!("Failed to translate reporting descriptor address: {e}");
continue;
}
};
if let Err(e) =
Self::release_memory_range(desc_chain.memory(), addr, desc.len() as usize)
{
warn!("Failed to release reported memory range: {e}");
}
} }
self.queues[queue_index] self.queues[queue_index]