mbochs_close() iterates over global device state and frees it. Currently this is done every time a device FD is closed, but if multiple device FDs are open this could corrupt other still active FDs.
Change this to use close_device() so it only runs on the last close.
Reviewed-by: Cornelia Huck cohuck@redhat.com Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Jason Gunthorpe jgg@nvidia.com --- samples/vfio-mdev/mbochs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index 5ac65894fcd38c..6974626ec1c5d0 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -1278,7 +1278,7 @@ static long mbochs_ioctl(struct vfio_device *vdev, unsigned int cmd, return -ENOTTY; }
-static void mbochs_close(struct vfio_device *vdev) +static void mbochs_close_device(struct vfio_device *vdev) { struct mdev_state *mdev_state = container_of(vdev, struct mdev_state, vdev); @@ -1396,7 +1396,7 @@ static struct attribute_group *mdev_type_groups[] = { };
static const struct vfio_device_ops mbochs_dev_ops = { - .release = mbochs_close, + .close_device = mbochs_close_device, .read = mbochs_read, .write = mbochs_write, .ioctl = mbochs_ioctl,