From: Johannes Berg <johannes@sipsolutions.net>
To: Dongliang Mu <mudongliangabcd@gmail.com>
Cc: Kalle Valo <kvalo@codeaurora.org>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Luca Coelho <luciano.coelho@intel.com>,
Ilan Peer <ilan.peer@intel.com>,
syzbot+1638e7c770eef6b6c0d0@syzkaller.appspotmail.com,
linux-wireless@vger.kernel.org,
"open list:NETWORKING [GENERAL]" <netdev@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Dan Carpenter <dan.carpenter@oracle.com>
Subject: Re: [PATCH] cfg80211: free the object allocated in wiphy_apply_custom_regulatory
Date: Fri, 23 Jul 2021 11:18:10 +0200 [thread overview]
Message-ID: <11ba299b812212a07fe3631b7be0e8b8fd5fb569.camel@sipsolutions.net> (raw)
In-Reply-To: <CAD-N9QWDNvo_3bdB=8edyYWvEV=b-66Tx-P6_7JGgrSYshDh0A@mail.gmail.com>
On Fri, 2021-07-23 at 17:13 +0800, Dongliang Mu wrote:
> On Fri, Jul 23, 2021 at 4:37 PM Johannes Berg <johannes@sipsolutions.net> wrote:
> >
> > On Fri, 2021-07-23 at 13:09 +0800, Dongliang Mu wrote:
> > > The commit beee24695157 ("cfg80211: Save the regulatory domain when
> > > setting custom regulatory") forgets to free the newly allocated regd
> > > object.
> >
> > Not really? It's not forgetting it, it just saves it?
>
> Yes, it saves the regd object in the function wiphy_apply_custom_regulatory.
Right.
> But its parent function - mac80211_hwsim_new_radio forgets to free
> this object when the ieee80211_register_hw fails.
But why is this specific to mac80211-hwsim?
Any other code calling wiphy_apply_custom_regulatory() and then failing
the subsequent wiphy_register() or otherwise calling wiphy_free() will
run into the same situation.
So why wouldn't we free this in wiphy_free(), if it exists?
johannes
next prev parent reply other threads:[~2021-07-23 9:18 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-23 5:09 [PATCH] cfg80211: free the object allocated in wiphy_apply_custom_regulatory Dongliang Mu
2021-07-23 5:16 ` Dongliang Mu
2021-07-23 8:37 ` Johannes Berg
2021-07-23 9:13 ` Dongliang Mu
2021-07-23 9:18 ` Johannes Berg [this message]
2021-07-23 9:30 ` Dongliang Mu
2021-07-23 9:42 ` Johannes Berg
2021-07-23 9:59 ` Dongliang Mu
2021-07-23 9:18 ` xiaoqiang zhao
2021-07-23 9:25 ` Dongliang Mu
2021-07-23 9:36 ` xiaoqiang zhao
2021-07-23 9:44 ` Dongliang Mu
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