linux-kernel - Re: [PATCH] cfg80211: free the object allocated in wiphy_apply_custom

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Message-ID: <2e9e6fa7-a405-088d-3b4c-da62b85f3fc6@gmail.com>
Date:   Fri, 23 Jul 2021 17:36:02 +0800
From:   xiaoqiang zhao <zhaoxiaoqiang007@...il.com>
To:     Dongliang Mu <mudongliangabcd@...il.com>
Cc:     Johannes Berg <johannes@...solutions.net>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Luca Coelho <luciano.coelho@...el.com>,
        Ilan Peer <ilan.peer@...el.com>,
        syzbot+1638e7c770eef6b6c0d0@...kaller.appspotmail.com,
        Johannes Berg <johannes.berg@...el.com>,
        linux-wireless@...r.kernel.org,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cfg80211: free the object allocated in
 wiphy_apply_custom_regulatory



在 2021/7/23 17:25, Dongliang Mu 写道:
> Can you point out the concrete code releasing regd? Maybe the link to elixir.
> 
>>>       ieee80211_unregister_hw(data->hw);
>>>       device_release_driver(data->dev);
>>>       device_unregister(data->dev);
>>>

call graph seems like this:

ieee80211_unregister_hw
(https://elixir.bootlin.com/linux/v5.14-rc2/source/net/mac80211/main.c#L1368)
	wiphy_unregister
(https://elixir.bootlin.com/linux/v5.14-rc2/source/net/wireless/core.c#L1011)
		wiphy_regulatory_deregister
(https://elixir.bootlin.com/linux/v5.14-rc2/source/net/wireless/reg.c#L4057)
			rcu_free_regdom