linux-kernel - Re: [PATCH v2 3/8] Convert virtio_console to kvzalloc

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Message-ID: <1518639587.3678.25.camel@perches.com>
Date:   Wed, 14 Feb 2018 12:19:47 -0800
From:   Joe Perches <joe@...ches.com>
To:     Matthew Wilcox <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Matthew Wilcox <mawilcox@...rosoft.com>, linux-mm@...ck.org,
        Kees Cook <keescook@...omium.org>,
        linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH v2 3/8] Convert virtio_console to kvzalloc_struct

On Wed, 2018-02-14 at 12:11 -0800, Matthew Wilcox wrote:
> From: Matthew Wilcox <mawilcox@...rosoft.com>
> 
> Signed-off-by: Matthew Wilcox <mawilcox@...rosoft.com>
> ---
>  drivers/char/virtio_console.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
> index 468f06134012..e0816cc2c6bd 100644
> --- a/drivers/char/virtio_console.c
> +++ b/drivers/char/virtio_console.c
> @@ -433,8 +433,7 @@ static struct port_buffer *alloc_buf(struct virtqueue *vq, size_t buf_size,
>  	 * Allocate buffer and the sg list. The sg list array is allocated
>  	 * directly after the port_buffer struct.
>  	 */
> -	buf = kmalloc(sizeof(*buf) + sizeof(struct scatterlist) * pages,
> -		      GFP_KERNEL);
> +	buf = kvzalloc_struct(buf, sg, pages, GFP_KERNEL);
>  	if (!buf)
>  		goto fail;

kvfree?