linux-kernel - Re: [PATCH V2] net: mdio: thunder: Fix a double free issue in the .remove function

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Message-ID: <20210513093751.GU1336@shell.armlinux.org.uk>
Date:   Thu, 13 May 2021 10:37:51 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     andrew@...n.ch, hkallweit1@...il.com, davem@...emloft.net,
        kuba@...nel.org, david.daney@...ium.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH V2] net: mdio: thunder: Fix a double free issue in the
 .remove function

On Thu, May 13, 2021 at 09:44:49AM +0200, Christophe JAILLET wrote:
> 'bus->mii_bus' have been allocated with 'devm_mdiobus_alloc_size()' in the
> probe function. So it must not be freed explicitly or there will be a
> double free.
> 
> Remove the incorrect 'mdiobus_free' in the remove function.
> 
> Fixes: 379d7ac7ca31 ("phy: mdio-thunder: Add driver for Cavium Thunder SoC MDIO buses.")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Also note that I did review your patch, and give you a reviewed-by for
it, which I think should have been carried over to v2 since Andrew's
comment was only concerning the formatting of the subject line. The
patch content is entirely fine. So, I'll give it again, so patchwork
gets the right information:

Reviewed-by: Russell King <rmk+kernel@...linux.org.uk>

My comments about the unregistration are a separate bug that should be
addressed in a separate follow-on patch. Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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