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| author | yuchenlin <yuchenlin@synology.com> | 2018-10-12 17:07:52 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-11-05 13:24:02 -0500 |
| commit | e6cc11d64fc998c11a4dfcde8fda3fc33a74d844 (patch) | |
| tree | 711cdb74fd9077a6598002fb5573755c052fa92d /scripts/qapi/introspect.py | |
| parent | 9b178f0e80cb007e1a96ac01f10d39e8955ddeb0 (diff) | |
| download | focaccia-qemu-e6cc11d64fc998c11a4dfcde8fda3fc33a74d844.tar.gz focaccia-qemu-e6cc11d64fc998c11a4dfcde8fda3fc33a74d844.zip | |
vhost-scsi: prevent using uninitialized vqs
There are 3 virtqueues (ctrl, event and cmd) for virtio scsi device,
but seabios will only set the physical address for the 3rd one (cmd).
Then in vhost_virtqueue_start(), virtio_queue_get_desc_addr()
will be 0 for ctrl and event vq.
In this case, ctrl and event vq are not initialized.
vhost_verify_ring_mappings may use uninitialized vhost_virtqueue
such that vhost_verify_ring_part_mapping returns ENOMEM.
When encountered this problem, we got the following logs:
qemu-system-x86_64: Unable to map available ring for ring 0
qemu-system-x86_64: Verify ring failure on region 0
Signed-off-by: Forrest Liu <forrestl@synology.com>
Signed-off-by: yuchenlin <yuchenlin@synology.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'scripts/qapi/introspect.py')
0 files changed, 0 insertions, 0 deletions