From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 2B66E47B413; Tue, 16 Jun 2026 17:19:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781630400; cv=none; b=ps2/UzhjhKsGhNp1Dcd64oDI4+hyycpjbOiIcOLe2YHdYUFy0FSKsrhPmad+pdWLmQoSslxiRrq0iZWNbKbD8NnlBvEKkenUva9OVEicORZ5TF5PJ57tnJjOWU54FC2z9tXAwZCogB+O20W/0EFEj5w4OOPcNZo/FpM91K19S8Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781630400; c=relaxed/simple; bh=Vy9qsmoNU4yRnPFefra+66EZc38OMl3rqv2TqC5kfUQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LLxrIdG3W87Ech07Ihy5MYhaSFRgl1nxeUBKpXrGuzdUthOQ8k8PR1AeP0M6JElhoNRBb+xIjLtQ/mNRXblg3Awi1Sm55HWpJtw+JZbeuOBEJ6qO9dvG59zTQcan+8ZPp+FWq+RLLh/KROzM4e+T6yHqn1nhvbcxeCfxAbx4gEI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dtJ4Wr96; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="dtJ4Wr96" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38CB61F00A3A; Tue, 16 Jun 2026 17:19:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781630399; bh=IPmZxVoUGCpgz1Hu0fH/yhXWI/W1catzJxJzW36z1hk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=dtJ4Wr96lnVmC3CDuebgBTaMcEPpValrEpuO+t5aDuQ9m+bgOsNoJja2uDjIOgNnB GOKwY8nrL/1jLhMtn/LzGThv7ZlAiXQWWIoxicQYV44r6EXg5L3xahsFdfr6BTR0KU KS2V1W3YIG6zeCxN9k6wOXvJ2jp0iKfh0/uVo8vU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jian Zhou , Eric Dumazet , Cong Wang , Jason Xing , Jiayuan Chen , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.1 022/522] ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() Date: Tue, 16 Jun 2026 20:22:49 +0530 Message-ID: <20260616145126.613017281@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145125.307082728@linuxfoundation.org> References: <20260616145125.307082728@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric Dumazet [ Upstream commit 87a1e0fe7776da7ab411be332b4be58ac8840d10 ] ipv4_sysctl_exit_net() is currently freeing net->ipv4.sysctl_local_reserved_ports too soon. Only after unregister_net_sysctl_table() we can be sure no threads can possibly use the sysctls, including /proc/sys/net/ipv4/ip_local_reserved_ports. Fixes: 122ff243f5f1 ("ipv4: make ip_local_reserved_ports per netns") Reported-by: Ji'an Zhou Signed-off-by: Eric Dumazet Cc: Cong Wang Reviewed-by: Jason Xing Reviewed-by: Jiayuan Chen Link: https://patch.msgid.link/20260521122147.3584624-1-edumazet@google.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/ipv4/sysctl_net_ipv4.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index 6b4c9b0fc9abb7..ef17d0f95a9da5 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -1449,10 +1449,10 @@ static __net_exit void ipv4_sysctl_exit_net(struct net *net) { struct ctl_table *table; - kfree(net->ipv4.sysctl_local_reserved_ports); table = net->ipv4.ipv4_hdr->ctl_table_arg; unregister_net_sysctl_table(net->ipv4.ipv4_hdr); kfree(table); + kfree(net->ipv4.sysctl_local_reserved_ports); } static __net_initdata struct pernet_operations ipv4_sysctl_ops = { -- 2.53.0