netdev - Re: [PATCH] sfc: fix a double-free bug in efx_probe

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Date: Tue, 19 Dec 2023 10:19:12 +0100
From: Paolo Abeni <pabeni@...hat.com>
To: Zhipeng Lu <alexious@....edu.cn>
Cc: Edward Cree <ecree.xilinx@...il.com>, Martin Habets
 <habetsm.xilinx@...il.com>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 netdev@...r.kernel.org,  linux-net-drivers@....com,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sfc: fix a double-free bug in efx_probe_filters

Hi,

On Thu, 2023-12-14 at 23:22 +0800, Zhipeng Lu wrote:
> In efx_probe_filters, the channel->rps_flow_id is freed in a
> efx_for_each_channel marco  when success equals to 0.
> However, after the following call chain:
> 
> efx_probe_filters
>   |-> ef100_net_open
>         |-> ef100_net_stop
>               |-> efx_remove_filters
> 
> The channel->rps_flow_id is freed again in the efx_for_each_channel of
> efx_remove_filters, triggering a double-free bug.
> 
> Fixes: a9dc3d5612ce ("sfc_ef100: RX filter table management and related gubbins")
> Signed-off-by: Zhipeng Lu <alexious@....edu.cn>

The patch LGTM, but could you please update the commit message as per
Simon's suggestions make it more consistent? You can retain Simon's RB
tag.

Thanks!

Paolo