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Date: Mon, 27 Jul 2026 16:29:44 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: luoqing <l1138897701@163.com>
Cc: marcelo.leitner@gmail.com, lucien.xin@gmail.com, davem@davemloft.net,
 edumazet@google.com, pabeni@redhat.com, horms@kernel.org,
 linux-sctp@vger.kernel.org, netdev@vger.kernel.org,
 linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next v4] sctp: socket: set *err = 0 on receive
 shutdown
Message-ID: <20260727162944.64697fba@kernel.org>
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On Tue, 21 Jul 2026 10:25:22 +0800 luoqing wrote:
> From: Qing Luo <luoqing@kylinos.cn>
> 
> When sctp_skb_recv_datagram() detects RCV_SHUTDOWN, it breaks out
> of the loop and returns NULL without setting *err. While current
> callers happen to work correctly (sctp_recvmsg pre-initializes
> err to 0, sctp_ulpevent_read_nxtinfo doesn't use err), this is
> inconsistent with the generic __skb_wait_for_more_packets() in
> net/core/datagram.c which explicitly sets *err = 0 on shutdown.
> 
> Set *err = 0 explicitly for correctness and robustness against
> future callers.
> 
> Signed-off-by: Qing Luo <luoqing@kylinos.cn>

AFAICT Xin Long asked you to toss this patch:

https://lore.kernel.org/all/CADvbK_e4StN7-vSRjYC_FPMN-_3xjwhCxYUb+Jddz-akO-ryPw@mail.gmail.com/

so I'm dropping it from our queue.