On Wed, 02 Mar 2022, Stefano Garzarella wrote: > On Wed, Mar 02, 2022 at 07:54:21AM +0000, Lee Jones wrote: > > vhost_vsock_handle_tx_kick() already holds the mutex during its call > > to vhost_get_vq_desc(). All we have to do is take the same lock > > during virtqueue clean-up and we mitigate the reported issues. > > > > Link: https://syzkaller.appspot.com/bug?extid=279432d30d825e63ba00 > > This issue is similar to [1] that should be already fixed upstream by [2]. > > However I think this patch would have prevented some issues, because > vhost_vq_reset() sets vq->private to NULL, preventing the worker from > running. > > Anyway I think that when we enter in vhost_dev_cleanup() the worker should > be already stopped, so it shouldn't be necessary to take the mutex. But in > order to prevent future issues maybe it's better to take them, so: > Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx> Thanks for the analysis and the review Stefano. -- Lee Jones [李琼斯] Principal Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
