netdev - Re: [PATCH net-next 5/8] net: use dst_dev_rcu() in sk_setup

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Message-ID: <5b7aabf0-0bed-43bb-9fc8-164f3638a7d1@kernel.org>
Date: Thu, 28 Aug 2025 16:12:15 -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 5/8] net: use dst_dev_rcu() in sk_setup_caps()

On 8/28/25 1:58 PM, Eric Dumazet wrote:
> Use RCU to protect accesses to dst->dev from sk_setup_caps()
> and sk_dst_gso_max_size().
> 
> Also use dst_dev_rcu() in ip6_dst_mtu_maybe_forward(),
> and ip_dst_mtu_maybe_forward().
> 
> ip4_dst_hoplimit() can use dst_dev_net_rcu().
> 
> Fixes: 4a6ce2b6f2ec ("net: introduce a new function dst_dev_put()")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  include/net/ip.h        |  6 ++++--
>  include/net/ip6_route.h |  2 +-
>  include/net/route.h     |  2 +-
>  net/core/sock.c         | 16 ++++++++++------
>  4 files changed, 16 insertions(+), 10 deletions(-)
> 

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