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

From: Russell King - ARM Linux admin
Date: Thu May 13 2021 - 04:11:49 EST


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.

This still leaves the unregister of an allocated-but-unregistered bus,
which you disagreed with - but I hope as I've pointed out the exact
code path in your v1 patch, you'll now realise is a real possibility.

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