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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 19423C432C3 for ; Sat, 16 Nov 2019 16:09:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D918020874 for ; Sat, 16 Nov 2019 16:09:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573920574; bh=jVnLETnGPfxAFSTB/kINL/wkeobz7QLCRb02W0EwSyE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dHttvTFL3JyqMPLZj8TR5z7bMGCRN1Q7uYAwXbsVsJJYTZGsguPzWFVE6IBuwjRN8 kqMM+NrWbnSx4RmC8GnJwflDqVfzk8kXLbCk68XUeB60FzD0+xu6yiYR9KNddcmCl7 Cb+iATq4sFqs9VZyr8kSqokib8xrkUoCUf3zSWbA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728815AbfKPPtk (ORCPT ); Sat, 16 Nov 2019 10:49:40 -0500 Received: from mail.kernel.org ([198.145.29.99]:57276 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730365AbfKPPtj (ORCPT ); Sat, 16 Nov 2019 10:49:39 -0500 Received: from sasha-vm.mshome.net (unknown [50.234.116.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E84D720885; Sat, 16 Nov 2019 15:49:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573919379; bh=jVnLETnGPfxAFSTB/kINL/wkeobz7QLCRb02W0EwSyE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J5tEZF173mxYvNXaLeKFhUWsUOtT7HWniJFQWT6vlwWNzYGuI3lpy+oRv28DECHky MMiX2qtamV54NoHzxbT+QYZwOwXHLkPhKF74/MM8FAe28aDBnNpVsRvxTYaT1XtkzB UBHFe6xbtEt1+fdNUaB+QonilT56+5NPoev1hsHk= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: =?UTF-8?q?Ernesto=20A=2E=20Fern=C3=A1ndez?= , Christoph Hellwig , Andrew Morton , Linus Torvalds , Sasha Levin , linux-fsdevel@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 095/150] hfsplus: fix BUG on bnode parent update Date: Sat, 16 Nov 2019 10:46:33 -0500 Message-Id: <20191116154729.9573-95-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191116154729.9573-1-sashal@kernel.org> References: <20191116154729.9573-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Ernesto A. Fernández [ Upstream commit 19a9d0f1acf75e8be8cfba19c1a34e941846fa2b ] Creating, renaming or deleting a file may hit BUG_ON() if the first record of both a leaf node and its parent are changed, and if this forces the parent to be split. This bug is triggered by xfstests generic/027, somewhat rarely; here is a more reliable reproducer: truncate -s 50M fs.iso mkfs.hfsplus fs.iso mount fs.iso /mnt i=1000 while [ $i -le 2400 ]; do touch /mnt/$i &>/dev/null ((++i)) done i=2400 while [ $i -ge 1000 ]; do mv /mnt/$i /mnt/$(perl -e "print $i x61") &>/dev/null ((--i)) done The issue is that a newly created bnode is being put twice. Reset new_node to NULL in hfs_brec_update_parent() before reaching goto again. Link: http://lkml.kernel.org/r/5ee1db09b60373a15890f6a7c835d00e76bf601d.1535682461.git.ernesto.mnd.fernandez@gmail.com Signed-off-by: Ernesto A. Fernández Cc: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- fs/hfsplus/brec.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/hfsplus/brec.c b/fs/hfsplus/brec.c index d3f36982f6858..0f53a486d2c18 100644 --- a/fs/hfsplus/brec.c +++ b/fs/hfsplus/brec.c @@ -448,6 +448,7 @@ static int hfs_brec_update_parent(struct hfs_find_data *fd) /* restore search_key */ hfs_bnode_read_key(node, fd->search_key, 14); } + new_node = NULL; } if (!rec && node->parent) -- 2.20.1