netdev - Re: [PATCH net-next 7/8] tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo

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Message-ID: <5a0deee8-3039-478a-9752-4fc2e87b1486@kernel.org>
Date: Thu, 28 Aug 2025 16:16:29 -0600
From: David Ahern <dsahern@...nel.org>
To: Eric Dumazet <edumazet@...gle.com>, "David S . Miller"
 <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Neal Cardwell <ncardwell@...gle.com>
Cc: Simon Horman <horms@...nel.org>, Kuniyuki Iwashima <kuniyu@...gle.com>,
 netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next 7/8] tcp: use dst_dev_rcu() in
 tcp_fastopen_active_disable_ofo_check()

On 8/28/25 1:58 PM, Eric Dumazet wrote:
> Use RCU to avoid a pair of atomic operations and a potential
> UAF on dst_dev()->flags.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  net/ipv4/tcp_fastopen.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>