linux-kernel - Re: [PATCH] [v2] net/mlx5e: fix a potential double-free in fs_any_create

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] [day] [month] [year] [list]

Message-ID: <20231130174410.GJ32077@kernel.org>
Date:   Thu, 30 Nov 2023 17:44:10 +0000
From:   Simon Horman <horms@...nel.org>
To:     Dinghao Liu <dinghao.liu@....edu.cn>
Cc:     Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rahul Rameshbabu <rrameshbabu@...dia.com>,
        Zhengchao Shao <shaozhengchao@...wei.com>,
        Aya Levin <ayal@...dia.com>, Tariq Toukan <tariqt@...dia.com>,
        netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2] net/mlx5e: fix a potential double-free in
 fs_any_create_groups

On Tue, Nov 28, 2023 at 05:29:01PM +0800, Dinghao Liu wrote:
> When kcalloc() for ft->g succeeds but kvzalloc() for in fails,
> fs_any_create_groups() will free ft->g. However, its caller
> fs_any_create_table() will free ft->g again through calling
> mlx5e_destroy_flow_table(), which will lead to a double-free.
> Fix this by setting ft->g to NULL in fs_any_create_groups().
> 
> Fixes: 0f575c20bf06 ("net/mlx5e: Introduce Flow Steering ANY API")
> Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
> ---
> 
> Changelog:
> 
> v2: Setting ft->g to NULL instead of removing the kfree().

Reviewed-by: Simon Horman <horms@...nel.org>