netdev - Re: [RFC bpf-next v1 1/7] net/mlx5e: Fix generating skb from nonlinear xdp

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Message-ID: <e41d259e-ba24-47ab-8b08-279a2a3ec975@nvidia.com>
Date: Thu, 28 Aug 2025 16:41:55 +0300
From: Nimrod Oren <noren@...dia.com>
To: Amery Hung <ameryhung@...il.com>, bpf@...r.kernel.org
Cc: netdev@...r.kernel.org, alexei.starovoitov@...il.com, andrii@...nel.org,
 daniel@...earbox.net, kuba@...nel.org, martin.lau@...nel.org,
 mohsin.bashr@...il.com, saeedm@...dia.com, tariqt@...dia.com,
 mbloch@...dia.com, maciej.fijalkowski@...el.com, kernel-team@...a.com,
 Dragos Tatulea <dtatulea@...dia.com>, Gal Pressman <gal@...dia.com>
Subject: Re: [RFC bpf-next v1 1/7] net/mlx5e: Fix generating skb from
 nonlinear xdp_buff

On 25/08/2025 22:39, Amery Hung wrote:
> +			headlen = min_t(u16, MLX5E_RX_MAX_HEAD - len, sinfo->xdp_frags_size);

I suspect that this is what caused the crash I mentioned earlier.
It seems that sinfo->xdp_frags_size is already zeroed at this point.