linux-kernel - Re: [PATCH] [v2] net/mlx5e: fix a potential double-free in fs_udp_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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <ZXDtQj_lGub3-cWT@x130>
Date:   Wed, 6 Dec 2023 13:53:06 -0800
From:   Saeed Mahameed <saeed@...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>,
        Zhengchao Shao <shaozhengchao@...wei.com>,
        Simon Horman <horms@...nel.org>,
        Rahul Rameshbabu <rrameshbabu@...dia.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_udp_create_groups

On 28 Nov 17:40, Dinghao Liu wrote:
>When kcalloc() for ft->g succeeds but kvzalloc() for in fails,
>fs_udp_create_groups() will free ft->g. However, its caller
>fs_udp_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_udp_create_groups().
>
>Fixes: 1c80bd684388 ("net/mlx5e: Introduce Flow Steering UDP API")
>Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
>---
>
>Changelog:
>
>v2: Setting ft->g to NULL instead of removing the kfree().
>---

Applied to net-mlx5.

- Saeed