netdev - Re: [PATCH nf] netfilter: nf_tables: prevent nf_skb

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Message-ID: <Zvadt0P6TDZwELej@calendula>
Date: Fri, 27 Sep 2024 13:57:43 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: Eric Dumazet <edumazet@...gle.com>
Cc: "David S . Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Jozsef Kadlecsik <kadlec@...filter.org>, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org, coreteam@...filter.org,
	eric.dumazet@...il.com, syzbot <syzkaller@...glegroups.com>
Subject: Re: [PATCH nf] netfilter: nf_tables: prevent nf_skb_duplicated
 corruption

On Thu, Sep 26, 2024 at 06:56:11PM +0000, Eric Dumazet wrote:
> syzbot found that nf_dup_ipv4() or nf_dup_ipv6() could write
> per-cpu variable nf_skb_duplicated in an unsafe way [1].
> 
> Disabling preemption as hinted by the splat is not enough,
> we have to disable soft interrupts as well.

Applied, thanks