linux-kernel - Re: [PATCH] net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc

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Date:   Thu, 02 Dec 2021 03:10:09 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Zhou Qingyang <zhou1615@....edu>
Cc:     kjlu@....edu, tariqt@...dia.com, davem@...emloft.net,
        kuba@...nel.org, eugenia@...lanox.com, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/mlx4_en: Fix an use-after-free bug in
 mlx4_en_try_alloc_resources()

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Wed,  1 Dec 2021 00:44:38 +0800 you wrote:
> In mlx4_en_try_alloc_resources(), mlx4_en_copy_priv() is called and
> tmp->tx_cq will be freed on the error path of mlx4_en_copy_priv().
> After that mlx4_en_alloc_resources() is called and there is a dereference
> of &tmp->tx_cq[t][i] in mlx4_en_alloc_resources(), which could lead to
> a use after free problem on failure of mlx4_en_copy_priv().
> 
> Fix this bug by adding a check of mlx4_en_copy_priv()
> 
> [...]

Here is the summary with links:
  - net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources()
    https://git.kernel.org/netdev/net/c/addad7643142

You are awesome, thank you!
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