From c9f6552803d852d593dec9ef5bb39b7a61091963 Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Tue, 26 Aug 2014 14:30:30 +0800 Subject: [PATCH] virtio-scsi: Report error if num_queues is 0 or too large No cmd vq surprises guest (Linux panics in virtscsi_probe), too many queues abort qemu (in the following virtio_add_queue). Signed-off-by: Fam Zheng Signed-off-by: Paolo Bonzini --- hw/scsi/virtio-scsi.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 2dd92552e0..86aba8851d 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -699,6 +699,12 @@ void virtio_scsi_common_realize(DeviceState *dev, Error **errp, virtio_init(vdev, "virtio-scsi", VIRTIO_ID_SCSI, sizeof(VirtIOSCSIConfig)); + if (s->conf.num_queues <= 0 || s->conf.num_queues > VIRTIO_PCI_QUEUE_MAX) { + error_setg(errp, "Invalid number of queues (= %" PRId32 "), " + "must be a positive integer less than %d.", + s->conf.num_queues, VIRTIO_PCI_QUEUE_MAX); + return; + } s->cmd_vqs = g_malloc0(s->conf.num_queues * sizeof(VirtQueue *)); s->sense_size = VIRTIO_SCSI_SENSE_SIZE; s->cdb_size = VIRTIO_SCSI_CDB_SIZE;