=====================================================
BUG: KMSAN: uninit-value in vring_map_one_sg drivers/virtio/virtio_ring.c:380 [inline]
BUG: KMSAN: uninit-value in virtqueue_add_split drivers/virtio/virtio_ring.c:614 [inline]
BUG: KMSAN: uninit-value in virtqueue_add+0x1e86/0x65c0 drivers/virtio/virtio_ring.c:2210
 vring_map_one_sg drivers/virtio/virtio_ring.c:380 [inline]
 virtqueue_add_split drivers/virtio/virtio_ring.c:614 [inline]
 virtqueue_add+0x1e86/0x65c0 drivers/virtio/virtio_ring.c:2210
 virtqueue_add_sgs+0x186/0x1b0 drivers/virtio/virtio_ring.c:2244
 __virtscsi_add_cmd drivers/scsi/virtio_scsi.c:471 [inline]
 virtscsi_add_cmd+0x838/0xad0 drivers/scsi/virtio_scsi.c:505
 virtscsi_queuecommand+0x898/0xa60 drivers/scsi/virtio_scsi.c:602
 scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1610 [inline]
 scsi_queue_rq+0x4cd0/0x5a80 drivers/scsi/scsi_lib.c:1852
 blk_mq_dispatch_rq_list+0x148e/0x3ae0 block/blk-mq.c:2058
 __blk_mq_sc