From c4f4c924bac393b2112ce89c66b825730327159f Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Tue, 4 Nov 2014 03:06:39 +0100 Subject: [PATCH 5/9] virtio-scsi: Report error if num_queues is 0 or too large Message-id: <1415070401-21222-2-git-send-email-famz@redhat.com> Patchwork-id: 62060 O-Subject: [RHEL-7.1 qemu-kvm PATCH v2 1/3] virtio-scsi: Report error if num_queues is 0 or too large Bugzilla: 1089606 RH-Acked-by: Markus Armbruster RH-Acked-by: Paolo Bonzini RH-Acked-by: Max Reitz 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 (cherry picked from commit c9f6552803d852d593dec9ef5bb39b7a61091963) Signed-off-by: Fam Zheng Downstream notes: changed error_setg -> error_report because downstream oesn't have errp. Also changed "return;" -> "return -1". Signed-off-by: Miroslav Rezanina --- 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 35b3d65..73f5ad1 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -605,6 +605,12 @@ int virtio_scsi_common_init(VirtIOSCSICommon *s) virtio_init(VIRTIO_DEVICE(s), "virtio-scsi", VIRTIO_ID_SCSI, sizeof(VirtIOSCSIConfig)); + if (s->conf.num_queues <= 0 || s->conf.num_queues > VIRTIO_PCI_QUEUE_MAX) { + error_report("Invalid number of queues (= %" PRId32 "), " + "must be a positive integer less than %d.", + s->conf.num_queues, VIRTIO_PCI_QUEUE_MAX); + return -1; + } 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; -- 1.8.3.1