From patchwork Thu Aug 31 05:31:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "hch@lst.de" X-Patchwork-Id: 13370922 X-Patchwork-Delegate: paul@paul-moore.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B1F5C83F2B for ; Thu, 31 Aug 2023 05:32:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242275AbjHaFcU (ORCPT ); Thu, 31 Aug 2023 01:32:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245458AbjHaFcT (ORCPT ); Thu, 31 Aug 2023 01:32:19 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 40971CD6; Wed, 30 Aug 2023 22:32:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Sender:Reply-To:Content-ID:Content-Description; bh=uGghW2I13jI1s6iCzfvyY6VFo2KuSrw5mx3MS02ZxdA=; b=UOuGFtVdc4LyLWQQgplDozXLY+ D5qVUJ5Ocj6dI7tE1CQZZfZJxWSt0NBz3ZjqBraP9GxkW2aPqNI+GrYA6yQ8f25W0NW4AWF3kmsgX Xwjtti0FD3v0Pmubqu5DqlI2sZl4aQV9b1awL7Njenugw49DaH76pgqG/rZcRW9kcmw+hVps2qrq/ nUgmUqSVUMsy34OhQNOjxkTq4eQ9RACqgQyK19s+OWT03Ohtvghoj5EyvUmv6hc2AoRHfyIQ8fEdo 5rZttcWQCJmQLnkprYZkEq93wKHA49HYV6HztAHAO/oedD60dPSvHkAK1tOo9Zq8jfNqwk3L8jSwl iP83Di4g==; Received: from 2a02-8389-2341-5b80-39d3-4735-9a3c-88d8.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:39d3:4735:9a3c:88d8] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1qbaHr-00EgmO-07; Thu, 31 Aug 2023 05:32:11 +0000 From: Christoph Hellwig To: Alexander Viro , Christian Brauner Cc: Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Paul Moore , Stephen Smalley , Eric Paris , linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org, selinux@vger.kernel.org Subject: [PATCH 3/4] selinuxfs: free sb->s_fs_info after shutting down the super block Date: Thu, 31 Aug 2023 07:31:56 +0200 Message-Id: <20230831053157.256319-4-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230831053157.256319-1-hch@lst.de> References: <20230831053157.256319-1-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 Precedence: bulk List-ID: X-Mailing-List: selinux@vger.kernel.org sb->s_fs_info can only be safely freed after generic_shutdown_super was called and all access to the super_block has stopped. Thus only free the private data after calling kill_litter_super, which calls generic_shutdown_super internally. Also remove the duplicate freeing in the sel_fill_super error path given that ->kіll_sb is also called on ->fill_super failure. Signed-off-by: Christoph Hellwig --- security/selinux/selinuxfs.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c index 9dafb6ff110d26..8a8a532be8e767 100644 --- a/security/selinux/selinuxfs.c +++ b/security/selinux/selinuxfs.c @@ -2100,9 +2100,6 @@ static int sel_fill_super(struct super_block *sb, struct fs_context *fc) err: pr_err("SELinux: %s: failed while creating inodes\n", __func__); - - selinux_fs_info_free(sb); - return ret; } @@ -2123,8 +2120,8 @@ static int sel_init_fs_context(struct fs_context *fc) static void sel_kill_sb(struct super_block *sb) { - selinux_fs_info_free(sb); kill_litter_super(sb); + selinux_fs_info_free(sb); } static struct file_system_type sel_fs_type = {