From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from azure-sdnproxy.icoremail.net (azure-sdnproxy.icoremail.net [52.175.55.52]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8BD4E21CC5A; Sat, 11 Jul 2026 04:23:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=52.175.55.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783743786; cv=none; b=cQLr9Eq9pSEQa8YqdyH0Bz0axDwcb4teDMD52GjmmSzJVFoY77xeKBa6Wj47MJktCcFv6EAfYTV+UTiwiokMxvwPrARdh+CJWp+CNRUxpW6LMnly3obqpuqURq5X10WzarACp9v9RaSV3VrPP+BlBvsfacpH2/CmFIUdGm/S5XE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783743786; c=relaxed/simple; bh=Gouxmcm5kuouDRujJhN/PPdbtWpMwyVbeTWCP8xYus4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Y/bw4x9hlyipvR/G4hjdfbFkNXBSrlHX71L/l+ehHYkdmpTcXNQ4tS/rc9XJjeyaztoZEhd13iTDOtHpzwkwiRrpyWF3uajq9WWyv4FO2KMAT4i2eTep0k8xt/niSAnqoHkspKd3YwwHU7PL/9ye1gXLdXcLQ0rWY3XHwIBMug4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lzu.edu.cn; spf=pass smtp.mailfrom=lzu.edu.cn; arc=none smtp.client-ip=52.175.55.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lzu.edu.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lzu.edu.cn Received: from enjou-Legion-Y7000P-2019 (unknown [123.114.53.210]) by app3 (Coremail) with SMTP id ywmowADX5vkMxVFqVnZFAA--.44345S4; Sat, 11 Jul 2026 12:22:47 +0800 (CST) From: Ren Wei To: linux-sctp@vger.kernel.org, netdev@vger.kernel.org Cc: marcelo.leitner@gmail.com, lucien.xin@gmail.com, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, horms@kernel.org, matttbe@kernel.org, yuantan098@gmail.com, yifanwucs@gmail.com, tomapufckgml@gmail.com, bird@lzu.edu.cn, tpluszz77@gmail.com, roxy520tt@gmail.com, n05ec@lzu.edu.cn, sashiko-bot@kernel.org Subject: [PATCH net v2 2/2] sctp: close UDP tunnel sockets during netns teardown Date: Sat, 11 Jul 2026 12:22:17 +0800 Message-ID: X-Mailer: git-send-email 2.51.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:ywmowADX5vkMxVFqVnZFAA--.44345S4 X-Coremail-Antispam: 1UD129KBjvJXoW7uFy7CFWkGrykCF4kKr15urg_yoW8XF4rpF 1fGayftFW8J34vqrn3GF48Kr1rCan5G39rCwn8Gw1rArsxGry5Ka40qrW8uF48CFW0kFWa vF1vgr1DKan8AFUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUB21xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AE w4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2 IY67AKxVW5JVW7JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVWxJVW8Jr1l84ACjcxK6I8E 87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s1le2I262IYc4CY6c 8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_ Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwI xGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7CjxVA2Y2ka0xkIwI1lc7CjxVAa w2AFwI0_GFv_Wrylc2xSY4AK67AK6r45MxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v1s IEY20_GrWl4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s02 6x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r4a6rW5MIIYrxkI7VAKI48JMIIF0x vE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE 42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6x kF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjTRW9a9UUUUU X-CM-SenderInfo: zqqvvuo6o23hxhgxhubq/1tbiAQAFCWpQq1gLqAAAsn From: Zhiling Zou proc_sctp_do_udp_port() starts per-net SCTP UDP tunneling sockets when net.sctp.udp_port is set, and stops/restarts them when the sysctl value changes. The netns exit path does not stop these sockets, so a namespace can be torn down while its SCTP UDP tunnel sockets are still installed. Close the UDP tunnel sockets from sctp_ctrlsock_exit() after unregistering the per-net sysctl table. This prevents new sysctl writes from racing in while the sockets are being released, and closes the sockets before the control socket is destroyed. Fixes: 046c052b475e ("sctp: enable udp tunneling socks") Cc: stable@vger.kernel.org Reported-by: Sashiko Closes: https://sashiko.dev/#/patchset/b9f1f02b0780ad6a719e2413f5f0bb8eb7702d94.1782585631.git.roxy520tt%40gmail.com Signed-off-by: Zhiling Zou Signed-off-by: Ren Wei --- net/sctp/protocol.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index f5fe6ddf0d7d..5dbc7e9e8f06 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -1458,6 +1458,7 @@ static int __net_init sctp_ctrlsock_init(struct net *net) static void __net_exit sctp_ctrlsock_exit(struct net *net) { sctp_sysctl_net_unregister(net); + sctp_udp_sock_stop(net); /* Free the control endpoint. */ inet_ctl_sock_destroy(net->sctp.ctl_sock); -- 2.43.0