linux-kernel - Re: [PATCH 1/1] rpmsg: virtio_rpmsg_bus: Fix rpmsg_create

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Date:   Wed, 25 Jul 2018 17:36:33 -0500
From:   Suman Anna <s-anna@...com>
To:     Loic Pallardy <loic.pallardy@...com>, <bjorn.andersson@...aro.org>,
        <ohad@...ery.com>
CC:     <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <arnaud.pouliquen@...com>, <benjamin.gaignard@...aro.org>
Subject: Re: [PATCH 1/1] rpmsg: virtio_rpmsg_bus: Fix rpmsg_create_channel
 memory leak

Hi Loic,

On 07/25/2018 04:08 PM, Loic Pallardy wrote:
> In case of rpmsg_register_device() failure, vch previously
> allocated must be free.
> 

Isn't this already handled through the virtio_rpmsg_release_device()
callback as part of the put_device() in rpmsg_register_device() failure.

regards
Suman

> fixes: 6eed598a0491 ("rpmsg: Split off generic tail of create_channel()")
> 
> Signed-off-by: Loic Pallardy <loic.pallardy@...com>
> ---
>  drivers/rpmsg/virtio_rpmsg_bus.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
> index 664f957..10f927e 100644
> --- a/drivers/rpmsg/virtio_rpmsg_bus.c
> +++ b/drivers/rpmsg/virtio_rpmsg_bus.c
> @@ -431,8 +431,10 @@ static struct rpmsg_device *rpmsg_create_channel(struct virtproc_info *vrp,
>  	rpdev->dev.parent = &vrp->vdev->dev;
>  	rpdev->dev.release = virtio_rpmsg_release_device;
>  	ret = rpmsg_register_device(rpdev);
> -	if (ret)
> +	if (ret) {
> +		kfree(vch);
>  		return NULL;
> +	}
>  
>  	return rpdev;
>  }
>