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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Yousef Alhouseen <alhouseenyousef@gmail.com>
Cc: Alexander Aring <alex.aring@gmail.com>,
	 Stefan Schmidt <stefan@datenfreihafen.org>,
	 Andrew Lunn <andrew+netdev@lunn.ch>,
	 "David S . Miller" <davem@davemloft.net>,
	 Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>,
	 Paolo Abeni <pabeni@redhat.com>,
	linux-wpan@vger.kernel.org,  netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,  stable@vger.kernel.org,
	syzbot+4707bb8a43a42fca2b97@syzkaller.appspotmail.com
Subject: Re: [PATCH net] ieee802154: hwsim: free PIB after unregistering hardware
Date: Fri, 03 Jul 2026 13:15:46 +0200	[thread overview]
Message-ID: <877bncnx25.fsf@bootlin.com> (raw)
In-Reply-To: <20260627235805.17310-1-alhouseenyousef@gmail.com> (Yousef Alhouseen's message of "Sun, 28 Jun 2026 01:58:05 +0200")

Hello Yousef,

> @@ -1004,12 +1004,11 @@ static void hwsim_del(struct hwsim_phy *phy)
>  		list_del_rcu(&e->list);
>  		hwsim_free_edge(e);
>  	}
> -	pib = rcu_dereference(phy->pib);
>  	rcu_read_unlock();
>  
> -	kfree_rcu(pib, rcu);
> -
>  	ieee802154_unregister_hw(phy->hw);
> +	pib = rcu_dereference_protected(phy->pib, 1);
> +	kfree_rcu(pib, rcu);
>  	ieee802154_free_hw(phy->hw);
>  }

Would you mind justifying the choice for the _protected() version,
please?

Thanks,
Miquèl

  reply	other threads:[~2026-07-03 11:15 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-27 23:58 [PATCH net] ieee802154: hwsim: free PIB after unregistering hardware Yousef Alhouseen
2026-07-03 11:15 ` Miquel Raynal [this message]
2026-07-03 11:19   ` Yousef Alhouseen
2026-07-06 15:10     ` Miquel Raynal

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