From: Puranjay Mohan Date: Mon, 25 Nov 2024 12:10:08 +0000 (+0000) Subject: nvme: fix metadata handling in nvme-passthrough X-Git-Tag: v5.15.174~491 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=061479ca14af9f9c2160a604052d18cc713e3842;p=thirdparty%2Fkernel%2Fstable.git nvme: fix metadata handling in nvme-passthrough [ Upstream commit 7c2fd76048e95dd267055b5f5e0a48e6e7c81fd9 ] 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/ Suggested-by: Christoph Hellwig Signed-off-by: Puranjay Mohan Reviewed-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Reviewed-by: Anuj Gupta Signed-off-by: Keith Busch [ Move the changes from nvme_map_user_request() to nvme_submit_user_cmd() to make it work on 5.15 ] Signed-off-by: Hagar Hemdan Signed-off-by: Sasha Levin --- diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c index 7397fad4c96ff..22ff0e617b8f0 100644 --- a/drivers/nvme/host/ioctl.c +++ b/drivers/nvme/host/ioctl.c @@ -61,11 +61,16 @@ static int nvme_submit_user_cmd(struct request_queue *q, bool write = nvme_is_write(cmd); struct nvme_ns *ns = q->queuedata; struct block_device *bdev = ns ? ns->disk->part0 : NULL; + bool supports_metadata = bdev && blk_get_integrity(bdev->bd_disk); + bool has_metadata = meta_buffer && meta_len; struct request *req; struct bio *bio = NULL; void *meta = NULL; int ret; + if (has_metadata && !supports_metadata) + return -EINVAL; + req = nvme_alloc_request(q, cmd, 0); if (IS_ERR(req)) return PTR_ERR(req); @@ -82,7 +87,7 @@ static int nvme_submit_user_cmd(struct request_queue *q, bio = req->bio; if (bdev) bio_set_dev(bio, bdev); - if (bdev && meta_buffer && meta_len) { + if (has_metadata) { meta = nvme_add_user_metadata(bio, meta_buffer, meta_len, meta_seed, write); if (IS_ERR(meta)) {