linux-kernel - Re: [PATCH] mac80211_hwsim: release driver when ieee80211_register

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Date:	Wed, 29 Oct 2014 18:23:02 +0800
From:	Junjie Mao <eternal.n08@...il.com>
To:	Martin Pitt <martin.pitt@...ntu.com>
Cc:	Junjie Mao <eternal.n08@...il.com>,
	Fengguang Wu <fengguang.wu@...el.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mac80211_hwsim: release driver when ieee80211_register_hw fails

I was not familiar with the acquiring/releasing API either, until I met
with this bug...

Perhaps we can use static checkers to avoid these issues as early as
possible. Any suggestions?

Best Regards
Junjie Mao

Martin Pitt <martin.pitt@...ntu.com> writes:

> Acked-By: Martin Pitt <martin.pitt@...ntu.com>
>
> Hello Junjie,
>
> Junjie Mao [2014-10-28  9:31 +0800]:
>> The driver is not released when ieee80211_register_hw fails in
>> mac80211_hwsim_create_radio, leading to the access to the unregistered (and
>> possibly freed) device in platform_driver_unregister:
>
> Many thanks for fixing this! Sorry about that, I don't know these bits
> very well.
>
> Martin
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