linux-kernel - Re: [PATCH] xen-netfront: handle NULL returned by xdp_convert_buff_to

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Message-ID: <20250416175835.687a5872@kernel.org>
Date: Wed, 16 Apr 2025 17:58:35 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Alexey Nepomnyashih <sdl@...ct.ru>
Cc: Juergen Gross <jgross@...e.com>, Stefano Stabellini
 <sstabellini@...nel.org>, Oleksandr Tyshchenko
 <oleksandr_tyshchenko@...m.com>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Alexei
 Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
 Jesper Dangaard Brouer <hawk@...nel.org>, John Fastabend
 <john.fastabend@...il.com>, xen-devel@...ts.xenproject.org,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
 lvc-project@...uxtesting.org, stable@...r.kernel.org
Subject: Re: [PATCH] xen-netfront: handle NULL returned by
 xdp_convert_buff_to_frame()

On Mon, 14 Apr 2025 18:34:01 +0000 Alexey Nepomnyashih wrote:
>  		get_page(pdata);

Please notice this get_page() here.

>  		xdpf = xdp_convert_buff_to_frame(xdp);
> +		if (unlikely(!xdpf)) {
> +			trace_xdp_exception(queue->info->netdev, prog, act);
> +			break;
> +		}