From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E5E92C64EC4 for ; Mon, 20 Feb 2023 13:52:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232376AbjBTNwV (ORCPT ); Mon, 20 Feb 2023 08:52:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232464AbjBTNwV (ORCPT ); Mon, 20 Feb 2023 08:52:21 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05CDC1E5FB for ; Mon, 20 Feb 2023 05:52:13 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 992D160CBA for ; Mon, 20 Feb 2023 13:52:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AECE5C433D2; Mon, 20 Feb 2023 13:52:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1676901132; bh=qsSyVfGk9HdlGff1u6FAHqgarxKPt7MtAhc7w8HxzUY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=geE/2l0r6zwrZpAfAQxU1Y0pjHgP7JY0HKFhlkzmgxPFElYmaSsFSkjOn5p/CTUc+ rqsNEn627KJGHaOOBGC7JCxEY27TBT2rqR4qZzVKcZT/6et1iY5kqSrwK0+CkbTBm5 /9WWHJ/LFgNoOByf/8ZsWSAUsOcAREYqvH9w7KIA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Winter , Kuniyuki Iwashima Subject: [PATCH 5.15 42/83] tcp: Fix listen() regression in 5.15.88. Date: Mon, 20 Feb 2023 14:36:15 +0100 Message-Id: <20230220133555.140865685@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230220133553.669025851@linuxfoundation.org> References: <20230220133553.669025851@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Kuniyuki Iwashima When we backport dadd0dcaa67d ("net/ulp: prevent ULP without clone op from entering the LISTEN status"), we have accidentally backported a part of 7a7160edf1bf ("net: Return errno in sk->sk_prot->get_port().") and removed err = -EADDRINUSE in inet_csk_listen_start(). Thus, listen() no longer returns -EADDRINUSE even if ->get_port() failed as reported in [0]. We set -EADDRINUSE to err just before ->get_port() to fix the regression. [0]: https://lore.kernel.org/stable/EF8A45D0-768A-4CD5-9A8A-0FA6E610ABF7@winter.cafe/ Reported-by: Winter Signed-off-by: Kuniyuki Iwashima Signed-off-by: Greg Kroah-Hartman --- net/ipv4/inet_connection_sock.c | 1 + 1 file changed, 1 insertion(+) --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -1070,6 +1070,7 @@ int inet_csk_listen_start(struct sock *s * It is OK, because this socket enters to hash table only * after validation is complete. */ + err = -EADDRINUSE; inet_sk_state_store(sk, TCP_LISTEN); if (!sk->sk_prot->get_port(sk, inet->inet_num)) { inet->inet_sport = htons(inet->inet_num);