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 X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1364FC47096 for ; Thu, 3 Jun 2021 17:16:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F3FA2613DE for ; Thu, 3 Jun 2021 17:16:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233627AbhFCRSS (ORCPT ); Thu, 3 Jun 2021 13:18:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:43558 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233324AbhFCROJ (ORCPT ); Thu, 3 Jun 2021 13:14:09 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 39BC461439; Thu, 3 Jun 2021 17:10:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622740255; bh=7FHT3txLUIWcHfvYeQqQl2mN7/I0q/3rhcPmbCXrO+8=; h=From:To:Cc:Subject:Date:From; b=kI0VjvTJ5GZigX1wVAOFlBmYwGaQ6P9LUk2wNGmZMJnGgpeMb4SfRzlitdHW0H9jg bxrYTDr8G7gRSU64YMVwmleKgptzxvAjP/5uYxaEx+mPdp/kuVL36VLyuqANz1MvWF wlt9XbULk+HC6uklJdytHA7sb2m+8wDKGlRvptP3Qk8gLM4EKW7Fb/HekMrCsVscfO WQjL6ZGjQGMoLUvnMszoyXLpHfmOj8YeHPdco8/X5g1tJo5f4kDy1TRV+ANHI3nwEy EdCwPesZwyc3Bi8hG0UP8FOsikqMiwUgambNLHhPPAG/aLn3ncf+5WasZlQuKzZfUk XKWYfINnC4dRg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jeimon , "David S . Miller" , Sasha Levin , linux-nfc@lists.01.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 01/17] net/nfc/rawsock.c: fix a permission check bug Date: Thu, 3 Jun 2021 13:10:36 -0400 Message-Id: <20210603171052.3169893-1-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jeimon [ Upstream commit 8ab78863e9eff11910e1ac8bcf478060c29b379e ] The function rawsock_create() calls a privileged function sk_alloc(), which requires a ns-aware check to check net->user_ns, i.e., ns_capable(). However, the original code checks the init_user_ns using capable(). So we replace the capable() with ns_capable(). Signed-off-by: Jeimon Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/nfc/rawsock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c index 92a3cfae4de8..2fba626a0125 100644 --- a/net/nfc/rawsock.c +++ b/net/nfc/rawsock.c @@ -345,7 +345,7 @@ static int rawsock_create(struct net *net, struct socket *sock, return -ESOCKTNOSUPPORT; if (sock->type == SOCK_RAW) { - if (!capable(CAP_NET_RAW)) + if (!ns_capable(net->user_ns, CAP_NET_RAW)) return -EPERM; sock->ops = &rawsock_raw_ops; } else { -- 2.30.2