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From: Aaron Conole <aconole@redhat.com>
To: Hyunwoo Kim <v4bel@theori.io>
Cc: pshelar@ovn.org,  edumazet@google.com,  dev@openvswitch.org,
	netdev@vger.kernel.org,  imv4bel@gmail.com,  kuba@kernel.org,
	pabeni@redhat.com,  davem@davemloft.net
Subject: Re: [ovs-dev] [PATCH] net: openvswitch: Fix Use-After-Free in ovs_ct_exit
Date: Wed, 24 Apr 2024 10:58:59 -0400	[thread overview]
Message-ID: <f7tfrvabydo.fsf@redhat.com> (raw)
In-Reply-To: <ZiYvzQN/Ry5oeFQW@v4bel-B760M-AORUS-ELITE-AX> (Hyunwoo Kim's message of "Mon, 22 Apr 2024 05:37:17 -0400")

Hyunwoo Kim <v4bel@theori.io> writes:

> Since kfree_rcu, which is called in the hlist_for_each_entry_rcu traversal
> of ovs_ct_limit_exit, is not part of the RCU read critical section, it
> is possible that the RCU grace period will pass during the traversal and
> the key will be free.
>
> To prevent this, it should be changed to hlist_for_each_entry_safe.
>
> Fixes: 11efd5cb04a1 ("openvswitch: Support conntrack zone limit")
> Signed-off-by: Hyunwoo Kim <v4bel@theori.io>
> ---

Reviewed-by: Aaron Conole <aconole@redhat.com>


  parent reply	other threads:[~2024-04-24 14:59 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-22  9:37 [PATCH] net: openvswitch: Fix Use-After-Free in ovs_ct_exit Hyunwoo Kim
2024-04-22 10:40 ` Eric Dumazet
2024-04-24 14:58 ` Aaron Conole [this message]
2024-04-25  2:40 ` patchwork-bot+netdevbpf

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