linux-kernel - Re: [PATCH] [v2] net/mlx5e: Fix two double free cases

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Date:   Tue, 05 Jan 2021 13:02:03 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     Dinghao Liu <dinghao.liu@....edu.cn>, kjlu@....edu
Cc:     Leon Romanovsky <leon@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Or Gerlitz <ogerlitz@...lanox.com>,
        Gal Pressman <galp@...lanox.com>,
        Maor Gottlieb <maorg@...lanox.com>, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2] net/mlx5e: Fix two double free cases

On Mon, 2020-12-28 at 16:48 +0800, Dinghao Liu wrote:
> mlx5e_create_ttc_table_groups() frees ft->g on failure of
> kvzalloc(), but such failure will be caught by its caller
> in mlx5e_create_ttc_table() and ft->g will be freed again
> in mlx5e_destroy_flow_table(). The same issue also occurs
> in mlx5e_create_ttc_table_groups(). Set ft->g to NULL after
> kfree() to avoid double free.
> 
> Fixes: 7b3722fa9ef64 ("net/mlx5e: Support RSS for GRE tunneled
> packets")
> Fixes: 33cfaaa8f36ff ("net/mlx5e: Split the main flow steering
> table")
> Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
> ---
> 
> Changelog:
> 
> v2: - Set ft->g to NULL after kfree() instead of removing kfree().
>       Refine commit message.
> 

applied to net-next-mlx5,
Thanks!