[PATCH v3] nvme: fix metadata handling in nvme-passthrough

[Keith Busch]

On Thu, Aug 29, 2024 at 01:32:17PM +0000, Puranjay Mohan wrote:
> On an NVMe namespace that does not support metadata, it is possible to
> send an IO command with metadata through io-passthru. This allows issues
> like [1] to trigger in the completion code path.
> nvme_map_user_request() doesn't check if the namespace supports metadata
> before sending it forward. It also allows admin commands with metadata to
> be processed as it ignores metadata when bdev == NULL and may report
> success.
> 
> Reject an IO command with metadata when the NVMe namespace doesn't
> support it and reject an admin command if it has metadata.
> 
> [1] https://lore.kernel.org/all/mb61pcylvnym8.fsf@amazon.com/

Thanks, applied to nvme-6.12.