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vhost-user-scmi: free vhost virtqueue array on cleanup

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vhost-user-scmi allocates vhost_dev.vqs during realize, but the
cleanup helper frees scmi->vhost_dev.vqs after vhost_dev_cleanup() has
cleared struct vhost_dev. This turns the free into g_free(NULL), leaking
the allocated vhost virtqueue array.

Keep a copy of the vhost_dev.vqs pointer across vhost_dev_cleanup() and
free that saved pointer from the common cleanup helper.

Fixes: a5dab090e1 (hw/virtio: Add boilerplate for vhost-user-scmi device)
Signed-off-by: GuoHan Zhao <zhaoguohan@kylinos.cn>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260630072728.3025097-1-zhaoguohan@kylinos.cn>
This commit is contained in:
GuoHan Zhao
2026-06-30 15:27:28 +08:00
committed by Michael S. Tsirkin
parent a2134e938a
commit cecd7a11df
1 changed files with 8 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
hw/virtio/vhost-user-scmi.c
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@@ -220,11 +220,12 @@ static void vu_scmi_event(void *opaque, QEMUChrEvent event)
}
}
static void do_vhost_user_cleanup(VirtIODevice *vdev, VHostUserSCMI *scmi)
static void do_vhost_user_cleanup(VirtIODevice *vdev, VHostUserSCMI *scmi,
struct vhost_virtqueue *vhost_vqs)
{
virtio_delete_queue(scmi->cmd_vq);
virtio_delete_queue(scmi->event_vq);
g_free(scmi->vhost_dev.vqs);
g_free(vhost_vqs);
virtio_cleanup(vdev);
vhost_user_cleanup(&scmi->vhost_user);
}
@@ -233,6 +234,7 @@ static void vu_scmi_device_realize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VHostUserSCMI *scmi = VHOST_USER_SCMI(dev);
struct vhost_virtqueue *vhost_vqs;
int ret;
if (!scmi->chardev.chr) {
@@ -252,13 +254,14 @@ static void vu_scmi_device_realize(DeviceState *dev, Error **errp)
scmi->event_vq = virtio_add_queue(vdev, 256, vu_scmi_handle_output);
scmi->vhost_dev.nvqs = 2;
scmi->vhost_dev.vqs = g_new0(struct vhost_virtqueue, scmi->vhost_dev.nvqs);
vhost_vqs = scmi->vhost_dev.vqs;
ret = vhost_dev_init(&scmi->vhost_dev, &scmi->vhost_user,
VHOST_BACKEND_TYPE_USER, 0, errp);
if (ret < 0) {
error_setg_errno(errp, -ret,
"vhost-user-scmi: vhost_dev_init() failed");
do_vhost_user_cleanup(vdev, scmi);
do_vhost_user_cleanup(vdev, scmi, vhost_vqs);
return;
}
@@ -270,10 +273,11 @@ static void vu_scmi_device_unrealize(DeviceState *dev)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VHostUserSCMI *scmi = VHOST_USER_SCMI(dev);
struct vhost_virtqueue *vhost_vqs = scmi->vhost_dev.vqs;
vu_scmi_set_status(vdev, 0);
vhost_dev_cleanup(&scmi->vhost_dev);
do_vhost_user_cleanup(vdev, scmi);
do_vhost_user_cleanup(vdev, scmi, vhost_vqs);
}
static const VMStateDescription vu_scmi_vmstate = {