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 973333D45CB; Tue, 16 Jun 2026 18:08:24 +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=1781633305; cv=none; b=CZOtPHeB2fZvwHCcDy2/1YIOdILmFUGbgOcZ2+Qczx/Ule+clhzjcRwRy4ydQ+VFZI2tO7PYaqTpN7I/Nfe3ejhWRqWyBPrZ1Xr3Y318R7Kq4dD5TVcMC2cQVsFRLfW8raywpcBOLVJ7x1LvPmRpMYOm/pE2elPyU2gLkZrkWh0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633305; c=relaxed/simple; bh=j7qc3fkERYNHZpNElpxEFCNvrn1AtNbTTmRIJjuXPjg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CkgcosM8rDXFCLxX8RGmKOPyYYIrpj4p86OiogbZLfIwXWTVrNajtZsKt10VE27vp0xdbOC2QR9+McGbzACe95GtQKmMGxF0bmgzr+ucXozBVcCSny3OqfUWQrOs+PKXBypHXMt1Ty7Dqfdk3x6Go62GCU/673CKq/E5Tmd85Y4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=i5MTuwKv; 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="i5MTuwKv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9B92D1F000E9; Tue, 16 Jun 2026 18:08:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781633304; bh=R5o91Pju35wpGyyHH2jn3P17Ime9vIa39/90oC1Qgno=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=i5MTuwKvhgQkYcwt6MVhMlPNSPPKY5sLPazItYTBsgqJb71RtXuTK9rg5eXIn7HR5 AvS/mwrJOG+l9UmtkWXeNw9AOb2t2iUuScFi5ku7Kf+GVSX7x5lXMUrwillCj7ymOF NhM/nE1ei8g97L1TZgtljMZrDHNAKfjGEyQgkBSA= 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 5.15 020/411] ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() Date: Tue, 16 Jun 2026 20:24:18 +0530 Message-ID: <20260616145101.457048648@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145100.376842714@linuxfoundation.org> References: <20260616145100.376842714@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 5.15-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 1f22e72074fdca..a7d335ab000403 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -1415,10 +1415,10 @@ 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