Re: [PATCH 1/1] vhost: Protect the virtqueue from being cleared whilst still in use

On Fri, 04 Mar 2022, Michael S. Tsirkin 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

Cc: stable@vger.kernel.org Reported-by: syzbot+adc3cb32385586bec859@syzkaller.appspotmail.com Signed-off-by: Lee Jones lee.jones@linaro.org

So combine with the warning patch and update description with the comment I posted, explaining it's more a just in case thing.

Will do. Plan is to submit this on Monday.