From: Simon Horman <horms@kernel.org>
To: Santosh Kalluri <santosh.kalluri129@gmail.com>
Cc: netdev@vger.kernel.org,
"Remi Denis-Courmont" <courmisch@gmail.com>,
"Rémi Denis-Courmont" <remi@remlab.net>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net] net: phonet: free phonet_device after RCU grace period
Date: Mon, 8 Jun 2026 14:13:15 +0100 [thread overview]
Message-ID: <20260608131315.GA122418@horms.kernel.org> (raw)
In-Reply-To: <20260604000843.4028467-1-santosh.kalluri129@gmail.com>
On Wed, Jun 03, 2026 at 05:08:43PM -0700, Santosh Kalluri wrote:
> phonet_device_destroy() removes a phonet_device from the per-net device
> list with list_del_rcu(), but frees it immediately. RCU readers walking
> the same list can still hold a pointer to the object after it has been
> removed, leading to a slab-use-after-free.
>
> Use kfree_rcu(), matching the lifetime rule already used by
> phonet_address_del() for the same object type.
>
> Fixes: eeb74a9d45f7 ("Phonet: convert devices list to RCU")
> Cc: stable@vger.kernel.org
> Signed-off-by: Santosh Kalluri <santosh.kalluri129@gmail.com>
> Acked-by: Rémi Denis-Courmont <remi@remlab.net>
Reviewed-by: Simon Horman <horms@kernel.org>
next prev parent reply other threads:[~2026-06-08 13:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-04 0:08 [PATCH net] net: phonet: free phonet_device after RCU grace period Santosh Kalluri
2026-06-08 13:13 ` Simon Horman [this message]
2026-06-09 0:40 ` patchwork-bot+netdevbpf
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