netdev - Re: [PATCH net-next v8 03/17] net: page_pool: create hooks for custom page providers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241209190230.2df85b79@kernel.org>
Date: Mon, 9 Dec 2024 19:02:30 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: David Wei <dw@...idwei.uk>
Cc: io-uring@...r.kernel.org, netdev@...r.kernel.org, Jens Axboe
 <axboe@...nel.dk>, Pavel Begunkov <asml.silence@...il.com>, Paolo Abeni
 <pabeni@...hat.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jesper Dangaard Brouer <hawk@...nel.org>, David
 Ahern <dsahern@...nel.org>, Mina Almasry <almasrymina@...gle.com>,
 Stanislav Fomichev <stfomichev@...il.com>, Joe Damato <jdamato@...tly.com>,
 Pedro Tammela <pctammela@...atatu.com>
Subject: Re: [PATCH net-next v8 03/17] net: page_pool: create hooks for
 custom page providers

On Wed,  4 Dec 2024 09:21:42 -0800 David Wei wrote:
> diff --git a/net/core/page_pool.c b/net/core/page_pool.c
> index f89cf93f6eb4..36f61a1e4ffe 100644
> --- a/net/core/page_pool.c
> +++ b/net/core/page_pool.c
> @@ -284,10 +284,11 @@ static int page_pool_init(struct page_pool *pool,
>  		rxq = __netif_get_rx_queue(pool->slow.netdev,
>  					   pool->slow.queue_idx);
>  		pool->mp_priv = rxq->mp_params.mp_priv;
> +		pool->mp_ops = rxq->mp_params.mp_ops;
>  	}
>  
> -	if (pool->mp_priv) {
> -		err = mp_dmabuf_devmem_init(pool);
> +	if (pool->mp_ops) {

Can we throw in a:

		if (WARN_ON(!is_kernel_rodata((unsigned long)pool->mp_ops)))
			goto free_ptr_ring;

here, to avoid any abuse?

> +		err = pool->mp_ops->init(pool);
>  		if (err) {
>  			pr_warn("%s() mem-provider init failed %d\n", __func__,
>  				err);