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| author | Raphael Norwitz <raphael.norwitz@nutanix.com> | 2019-08-22 11:34:25 -0700 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2019-09-16 06:27:35 -0400 |
| commit | b8487a357855e78957d8c9bddbbcf58548e1aa51 (patch) | |
| tree | 3f2766084746913848098f68528eddba7f83091d /backends/vhost-user.c | |
| parent | d8438bd24a3f2b6fd6d0e788c18483ca9e239b36 (diff) | |
| download | qemu-b8487a357855e78957d8c9bddbbcf58548e1aa51.zip qemu-b8487a357855e78957d8c9bddbbcf58548e1aa51.tar.gz qemu-b8487a357855e78957d8c9bddbbcf58548e1aa51.tar.bz2 | |
backends/vhost-user.c: prevent using uninitialized vqs
Similar rational to: e6cc11d64fc998c11a4dfcde8fda3fc33a74d844
For vhost scsi and vhost-user-scsi an issue was observed
where, of the 3 virtqueues, seabios would only set cmd,
leaving ctrl and event without a physical address.
This can caused vhost_verify_ring_part_mapping to return
ENOMEM, causing 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
The issue has already been fixed elsewhere, but it was noted
that in backends/vhost-user.c, the vhost_user_backend_dev_init()
function, which other vdevs use in their realize() to initialize
their vqs, was not being properly zeroing out the queues. This
commit ensures hardware modules using the
vhost_user_backend_dev_init() API properly zero out their vqs on
initialization.
Suggested-by: Philippe Mathieu-Daude <philmd@redhat.com>
Signed-off-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <1566498865-55506-2-git-send-email-raphael.norwitz@nutanix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'backends/vhost-user.c')
| -rw-r--r-- | backends/vhost-user.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/backends/vhost-user.c b/backends/vhost-user.c index 0a13506..2bf3406 100644 --- a/backends/vhost-user.c +++ b/backends/vhost-user.c @@ -46,7 +46,7 @@ vhost_user_backend_dev_init(VhostUserBackend *b, VirtIODevice *vdev, b->vdev = vdev; b->dev.nvqs = nvqs; - b->dev.vqs = g_new(struct vhost_virtqueue, nvqs); + b->dev.vqs = g_new0(struct vhost_virtqueue, nvqs); ret = vhost_dev_init(&b->dev, &b->vhost_user, VHOST_BACKEND_TYPE_USER, 0); if (ret < 0) { |