linux-kernel - Re: [PATCH v2] net: arc_emac: Fix use after free in arc_mdio

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Message-Id: <164695321078.6170.4849645757866961592.git-patchwork-notify@kernel.org>
Date:   Thu, 10 Mar 2022 23:00:10 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Jianglei Nie <niejianglei2021@....com>
Cc:     davem@...emloft.net, kuba@...nel.org, caihuoqing@...du.com,
        andrew@...n.ch, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: arc_emac: Fix use after free in arc_mdio_probe()

Hello:

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

On Wed,  9 Mar 2022 20:18:24 +0800 you wrote:
> If bus->state is equal to MDIOBUS_ALLOCATED, mdiobus_free(bus) will free
> the "bus". But bus->name is still used in the next line, which will lead
> to a use after free.
> 
> We can fix it by putting the name in a local variable and make the
> bus->name point to the rodata section "name",then use the name in the
> error message without referring to bus to avoid the uaf.
> 
> [...]

Here is the summary with links:
  - [v2] net: arc_emac: Fix use after free in arc_mdio_probe()
    https://git.kernel.org/netdev/net/c/bc0e610a6eb0

You are awesome, thank you!
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