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

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Message-ID: <20250804115728-mutt-send-email-mst@kernel.org>
Date: Mon, 4 Aug 2025 11:57:46 -0400
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Jason Wang <jasowang@...hat.com>
Cc: eperezma@...hat.com, kvm@...r.kernel.org,
	virtualization@...ts.linux.dev, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, sgarzare@...hat.com, will@...nel.org,
	JAEHOON KIM <jhkim@...ux.ibm.com>, Breno Leitao <leitao@...ian.org>
Subject: Re: [PATCH] vhost: initialize vq->nheads properly

On Mon, Aug 04, 2025 at 05:05:57PM +0800, Jason Wang wrote:
> Hi Michael:
> 
> On Tue, Jul 29, 2025 at 3:39 PM Jason Wang <jasowang@...hat.com> 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.
> >
> > Reported-by: JAEHOON KIM <jhkim@...ux.ibm.com>
> > Reported-by: Breno Leitao <leitao@...ian.org>
> > Fixes: 7918bb2d19c9 ("vhost: basic in order support")
> > Signed-off-by: Jason Wang <jasowang@...hat.com>
> 
> I didn't see this in your pull request.
> 
> Thanks

in next now. Will be in the next pull, thanks!

-- 
MST