From patchwork Fri May 8 15:36:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11536973 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4691792A for ; Fri, 8 May 2020 15:38:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23F7124953 for ; Fri, 8 May 2020 15:38:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="kXvLegnP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728115AbgEHPgr (ORCPT ); Fri, 8 May 2020 11:36:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728050AbgEHPgq (ORCPT ); Fri, 8 May 2020 11:36:46 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3AC95C061A0C; Fri, 8 May 2020 08:36:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=gdo1CI68NGJpSv9H2lBuA2msCSuabwKNVFFgXf1S+fQ=; b=kXvLegnPNvMN1Xbz6imxQGM4XM Z8HFAC7hxbTwBWprI5Zanbre5K5ZwnCBBb4002EVizfDHTsu7wogMSR3nHOL7Ph1/16Aya6Jhb4dJ Eux8v6F6qPyHNsXqCoATHO+bgojB6GwUxNrouxkwQPZklS6F4DXUwsKb7vxpKNcraqET5L2x04Rqu nEUOVezhcTYa4Zw/6XTkgLDACTmIpGAZ1rX0Rl5VqNFyF/wKFnxjiNP/rhXXEmYd753MOqRvCuUvS OO7jQSd/2NZJu8y8Qss0YVUQz5fsROiTd5y+++Ve6eHFR2VVNhw2NSaRKJVviaOwWCwlhMrw3OLBv eNQEao8g==; Received: from [2001:4bb8:180:9d3f:90d7:9df8:7cd:3504] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jX53N-00048d-Lx; Fri, 08 May 2020 15:36:46 +0000 From: Christoph Hellwig To: Alexander Viro Cc: linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, kvm@vger.kernel.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH 03/12] pidfd: use __anon_inode_getfd Date: Fri, 8 May 2020 17:36:25 +0200 Message-Id: <20200508153634.249933-4-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200508153634.249933-1-hch@lst.de> References: <20200508153634.249933-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org Use __anon_inode_getfd instead of opencoding the logic using get_unused_fd_flags + anon_inode_getfile. Signed-off-by: Christoph Hellwig --- kernel/fork.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/kernel/fork.c b/kernel/fork.c index 4385f3d639f23..31e0face01072 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2113,19 +2113,11 @@ static __latent_entropy struct task_struct *copy_process( * if the fd table isn't shared). */ if (clone_flags & CLONE_PIDFD) { - retval = get_unused_fd_flags(O_RDWR | O_CLOEXEC); + retval = __anon_inode_getfd("[pidfd]", &pidfd_fops, pid, + O_RDWR | O_CLOEXEC, &pidfile); if (retval < 0) goto bad_fork_free_pid; - pidfd = retval; - - pidfile = anon_inode_getfile("[pidfd]", &pidfd_fops, pid, - O_RDWR | O_CLOEXEC); - if (IS_ERR(pidfile)) { - put_unused_fd(pidfd); - retval = PTR_ERR(pidfile); - goto bad_fork_free_pid; - } get_pid(pid); /* held by pidfile now */ retval = put_user(pidfd, args->pidfd);