linux-kernel - Re: [PATCH v4 1/2] Revert "net: mdiobus: Fix memory leak in __mdiobus

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Date:   Fri, 01 Oct 2021 00:40:07 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Pavel Skripkin <paskripkin@...il.com>
Cc:     andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, kuba@...nel.org, buytenh@...vell.com,
        afleming@...escale.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, yanfei.xu@...driver.com
Subject: Re: [PATCH v4 1/2] Revert "net: mdiobus: Fix memory leak in
 __mdiobus_register"

Hello:

This series was applied to netdev/net.git (refs/heads/master):

On Thu, 30 Sep 2021 20:49:42 +0300 you wrote:
> This reverts commit ab609f25d19858513919369ff3d9a63c02cd9e2e.
> 
> This patch is correct in the sense that we _should_ call device_put() in
> case of device_register() failure, but the problem in this code is more
> vast.
> 
> We need to set bus->state to UNMDIOBUS_REGISTERED before calling
> device_register() to correctly release the device in mdiobus_free().
> This patch prevents us from doing it, since in case of device_register()
> failure put_device() will be called 2 times and it will cause UAF or
> something else.
> 
> [...]

Here is the summary with links:
  - [v4,1/2] Revert "net: mdiobus: Fix memory leak in __mdiobus_register"
    https://git.kernel.org/netdev/net/c/10eff1f5788b
  - [v4,2/2] phy: mdio: fix memory leak
    https://git.kernel.org/netdev/net/c/ca6e11c337da

You are awesome, thank you!
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