Re: [PATCH] vhost: initialize vq->nheads properly

[Dawid Osuchowski]

On 2025-07-29 9:39 AM, Jason Wang wrote:
> Commit 7918bb2d19c9 ("vhost: basic in order support") introduces
> vq->nheads to store the number of batched used buffers per used elem
> but it forgets to initialize the vq->nheads to NULL in
> vhost_dev_init() this will cause kfree() that would try to free it
> without be allocated if SET_OWNER is not called.

nit: as someone who is not familiar with vhost code, it took me a while 
to figure out you meant VHOST_SET_OWNER and the corresponding 
vhost_dev_set_owner()

> Reported-by: JAEHOON KIM <jhkim@xxxxxxxxxxxxx>
> Reported-by: Breno Leitao <leitao@xxxxxxxxxx>
> Fixes: 7918bb2d19c9 ("vhost: basic in order support")
> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>

Reviewed-by: Dawid Osuchowski <dawid.osuchowski@xxxxxxxxxxxxxxx>

Thanks,
Dawid