From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by smtp.subspace.kernel.org (Postfix) with ESMTPS id 34FFB26B74A
	for <linux-rdma@vger.kernel.org>; Tue, 28 Apr 2026 00:58:39 +0000 (UTC)
Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201
ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;
	t=1777337920; cv=none; b=CC2YDq7uPbbBWguqIIVzE+PuW/PQ7ksEhg7jPxeEZFOqxM4XtLEUMzkF+YHs6+Tjs8kYtMePxBqK0EN4f4ROt7HbRB8HNXKebbcFSiosG/vnFTxg8DWKa3ndBBP8zBsRZF6AhpG/OClIhsz7w44mwRC84UGddkfdPQaxJuLSQL8=
ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org;
	s=arc-20240116; t=1777337920; c=relaxed/simple;
	bh=o4knKAc6QwanZkMYuNvml2KCFjuGpUo1cJgFacZj4rw=;
	h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From:
	 In-Reply-To:Content-Type; b=ke1gIKFR0kXhbRbIx8tT8V3xiDP/XDeiI9P68LvjGYVpaRz9zefayJCvmCYqg6121CbUwzHcDJprcRAkS+zA5HqrVzTs8kqvF3crbyxbI93n+m8TcshniHWqgZ+tQv1uO/LzLIXvvI90pty76+GfDOdHmyF9lYFVbvb7/fjp6DY=
ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sqn5ADPL; arc=none smtp.client-ip=10.30.226.201
Authentication-Results: smtp.subspace.kernel.org;
	dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="sqn5ADPL"
Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E8B8C19425;
	Tue, 28 Apr 2026 00:58:39 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;
	s=k20201202; t=1777337919;
	bh=o4knKAc6QwanZkMYuNvml2KCFjuGpUo1cJgFacZj4rw=;
	h=Date:Subject:To:Cc:References:From:In-Reply-To:From;
	b=sqn5ADPLBRSiX0OYhDoWfmULlQFNsz4/j3qXJ27VabPPYnVAOHXGwWZDsvS6Us0kB
	 JO/7Ygew3lnDgQtUJib45rTicSfZSZZZOLyCzuEsj9SxYfZlfV0efjPAmf/TEtM7uV
	 Cxd9MFLu+QLzwm1fLHiycKUEPzLl/gV5O7RzjrC3hCum3YE59mSdXCEiRL2P8YNeCG
	 4zhpRNYjqH8iT2IwHJAAKvOLNQmGc3Z0OPss8yQlFILjgYiu5nw2cqkTypVVdRCSi4
	 R+1BuL6ITUVqpF4q8XoCtLwLfrH7uI0qIRbbmkLXwpVEoFExiMiN6Pm4K1Fd2UD8AJ
	 kijiruQss6HsA==
Message-ID: <0c1258e2-7060-4084-9a07-dd7af8262dec@kernel.org>
Date: Mon, 27 Apr 2026 18:58:38 -0600
Precedence: bulk
X-Mailing-List: linux-rdma@vger.kernel.org
List-Id: <linux-rdma.vger.kernel.org>
List-Subscribe: <mailto:linux-rdma+subscribe@vger.kernel.org>
List-Unsubscribe: <mailto:linux-rdma+unsubscribe@vger.kernel.org>
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH v2 1/2] RDMA/rxe: Fix null-ptr-deref in
 kernel_sock_shutdown().
Content-Language: en-US
To: Kuniyuki Iwashima <kuniyu@google.com>, "yanjun.zhu" <yanjun.zhu@linux.dev>
Cc: Zhu Yanjun <zyjzyj2000@gmail.com>, Jason Gunthorpe <jgg@ziepe.ca>,
 Leon Romanovsky <leon@kernel.org>, Kuniyuki Iwashima <kuni1840@gmail.com>,
 linux-rdma@vger.kernel.org,
 syzbot+d8f76778263ab65c2b21@syzkaller.appspotmail.com
References: <20260425060436.2316620-1-kuniyu@google.com>
 <20260425060436.2316620-2-kuniyu@google.com>
 <030d3487-b5b9-4067-8b8c-89b4e8756e1a@linux.dev>
 <86499305-4522-4a82-a689-0247f2d5f6c0@kernel.org>
 <4196fe33-88c2-416d-ac20-b68bf7f328a6@linux.dev>
 <CAAVpQUAh2KT=YpfDO5nkqrzH0kbAXEBVe6jtOtLc93wjs3N7Fg@mail.gmail.com>
 <e2e1406f-8d9d-4a96-949d-e75096446d1a@linux.dev>
 <9681c9e2-79a9-4d72-b1ad-229ba6d7aab7@kernel.org>
 <0cf42593-0149-4019-a51b-36f74ff67f51@linux.dev>
 <CAAVpQUDVb4VDibeXz-DmAHF7gOAvDenSTGA6DpEwwS5HaQjM5w@mail.gmail.com>
From: David Ahern <dsahern@kernel.org>
In-Reply-To: <CAAVpQUDVb4VDibeXz-DmAHF7gOAvDenSTGA6DpEwwS5HaQjM5w@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit

On 4/27/26 6:52 PM, Kuniyuki Iwashima wrote:
> 
> To be clear, you meant implementing David' idea, right ?
> I'm asking because dellink won't need locking then.

dellink is not needed with my suggestion. It was added to manage
basically a refcount on the socket to close on last rxe delete in the
namespace.