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[169.56.138.94]) by smtp.gmail.com with ESMTPSA id s36sm22703766pgl.8.2021.07.23.02.36.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 23 Jul 2021 02:36:06 -0700 (PDT) Subject: Re: [PATCH] cfg80211: free the object allocated in wiphy_apply_custom_regulatory To: Dongliang Mu Cc: Johannes Berg , Kalle Valo , "David S. Miller" , Jakub Kicinski , Luca Coelho , Ilan Peer , syzbot+1638e7c770eef6b6c0d0@syzkaller.appspotmail.com, Johannes Berg , linux-wireless@vger.kernel.org, "open list:NETWORKING [GENERAL]" , linux-kernel References: <20210723050919.1910964-1-mudongliangabcd@gmail.com> <6fa2aecc-ab64-894d-77c2-0a19b524cc03@gmail.com> From: xiaoqiang zhao Message-ID: <2e9e6fa7-a405-088d-3b4c-da62b85f3fc6@gmail.com> Date: Fri, 23 Jul 2021 17:36:02 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org 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