linux-kernel - Re: [PATCH net v2] udp: don't be set unconnected if only UDP cmsg

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Date: Thu, 18 Apr 2024 12:32:38 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: Yick Xie <yick.xie@...il.com>, willemdebruijn.kernel@...il.com, 
	willemb@...gle.com
Cc: netdev@...r.kernel.org, davem@...emloft.net, dsahern@...nel.org, 
	edumazet@...gle.com, kuba@...nel.org, linux-kernel@...r.kernel.org, 
	stable@...r.kernel.org
Subject: Re: [PATCH net v2] udp: don't be set unconnected if only UDP cmsg

Hi,

On Wed, 2024-04-17 at 03:03 +0800, Yick Xie wrote:
> If "udp_cmsg_send()" returned 0 (i.e. only UDP cmsg),
> "connected" should not be set to 0. Otherwise it stops
> the connected socket from using the cached route.
> 
> Fixes: 2e8de8576343 ("udp: add gso segment cmsg")
> Signed-off-by: Yick Xie <yick.xie@...il.com>
> Cc: stable@...r.kernel.org

Minor: the patch subj is IMHO a bit confusing, what about removing the
double negation?

preserve connect status with UDP-only cmsg

> ---
> v2: Add Fixes tag
> v1: https://lore.kernel.org/netdev/20240414195213.106209-1-yick.xie@gmailcom/
> ---
>  net/ipv4/udp.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
> index c02bf011d4a6..420905be5f30 100644
> --- a/net/ipv4/udp.c
> +++ b/net/ipv4/udp.c

What about ipv6? why this fix does not apply there, too?

Thanks!

Paolo